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The history of water supply and sanitation is one of a
logistical Logistics is generally the detailed organization and implementation of a complex operation. In a general business sense, logistics manages the flow of goods between the point of origin and the point of consumption to meet the requirements of ...
challenge to provide
clean water Drinking water is water that is used in drink or food preparation; potable water is water that is safe to be used as drinking water. The amount of drinking water required to maintain good health varies, and depends on physical activity level, ag ...
and
sanitation Sanitation refers to public health conditions related to clean drinking water and treatment and disposal of human excreta and sewage. Preventing human contact with feces is part of sanitation, as is hand washing with soap. Sanitation systems ...
systems since the dawn of
civilization A civilization (or civilisation) is any complex society characterized by the development of a state, social stratification, urbanization, and symbolic systems of communication beyond natural spoken language (namely, a writing system). Ci ...
. Where water resources, infrastructure or sanitation systems were insufficient, diseases spread and people fell sick or died prematurely. Major human settlements could initially develop only where fresh surface water was plentiful, such as near rivers or
natural springs A spring is a point of exit at which groundwater from an aquifer flows out on top of Earth's crust (pedosphere) and becomes surface water. It is a component of the hydrosphere. Springs have long been important for humans as a source of fresh ...
. Throughout history, people have devised systems to make getting water into their communities and households and disposing of (and later also treating)
wastewater Wastewater is water generated after the use of freshwater, raw water, drinking water or saline water in a variety of deliberate applications or processes. Another definition of wastewater is "Used water from any combination of domestic, industrial ...
more convenient. The historical focus of
sewage treatment Sewage treatment (or domestic wastewater treatment, municipal wastewater treatment) is a type of wastewater treatment which aims to remove contaminants from sewage to produce an effluent that is suitable for discharge to the surrounding envi ...
was on the conveyance of raw sewage to a natural body of water, e.g. a
river A river is a natural flowing watercourse, usually freshwater, flowing towards an ocean, sea, lake or another river. In some cases, a river flows into the ground and becomes dry at the end of its course without reaching another body of wat ...
or
ocean The ocean (also the sea or the world ocean) is the body of salt water that covers approximately 70.8% of the surface of Earth and contains 97% of Earth's water. An ocean can also refer to any of the large bodies of water into which the wor ...
, where it would be diluted and dissipated. Early
human Humans (''Homo sapiens'') are the most abundant and widespread species of primate, characterized by bipedalism and exceptional cognitive skills due to a large and complex brain. This has enabled the development of advanced tools, culture, an ...
habitations were often built next to water sources. Rivers would often serve as a crude form of natural sewage disposal. Over the millennia, technology has dramatically increased the distances across which water can be relocated. Furthermore, treatment processes to purify
drinking water Drinking water is water that is used in drink or food preparation; potable water is water that is safe to be used as drinking water. The amount of drinking water required to maintain good health varies, and depends on physical activity level, ag ...
and to treat wastewater have been improved.


Prehistory

During the
Neolithic The Neolithic period, or New Stone Age, is an Old World archaeological period and the final division of the Stone Age. It saw the Neolithic Revolution, a wide-ranging set of developments that appear to have arisen independently in several part ...
era, humans dug the first permanent
water well A well is an excavation or structure created in the ground by digging, driving, or drilling to access liquid resources, usually water. The oldest and most common kind of well is a water well, to access groundwater in underground aquifers. Th ...
s, from where vessels could be filled and carried by hand. Wells dug around 6500 BC have been found in the
Jezreel Valley The Jezreel Valley (from the he, עמק יזרעאל, translit. ''ʿĒmeq Yīzrəʿēʿl''), or Marj Ibn Amir ( ar, مرج ابن عامر), also known as the Valley of Megiddo, is a large fertile plain and inland valley in the Northern Distr ...
. The size of human settlements was largely dependent on nearby available water. A primitive indoor, tree bark lined, two-channel, stone, fresh and wastewater system appears to have featured in the houses of
Skara Brae Skara Brae is a stone-built Neolithic settlement, located on the Bay of Skaill on the west coast of Mainland, the largest island in the Orkney archipelago of Scotland. Consisting of ten clustered houses, made of flagstones, in earthen dams t ...
, and the
Barnhouse Settlement The Neolithic Barnhouse Settlement is sited by the shore of Loch of Harray, Orkney Mainland, Scotland, not far from the Standing Stones of Stenness, about 5 miles north-east of Stromness. It was discovered in 1984 by Colin Richards. Excavat ...
, from around 3000 BCE, along with a cell-like enclave in a number of houses, of Skara Brae, that it has been suggested may have functioned as an early indoor
latrine A latrine is a toilet or an even simpler facility that is used as a toilet within a sanitation system. For example, it can be a communal trench in the earth in a camp to be used as emergency sanitation, a hole in the ground ( pit latrine), or ...
.


Wastewater reuse activities

Waste
water reuse Water reclamation (also called wastewater reuse, water reuse or water recycling) is the process of converting municipal wastewater (sewage) or industrial wastewater into water that can be reused for a variety of purposes. Types of reuse include: ...
is an ancient practice, which has been applied since the dawn of human history, and is connected to the development of sanitation provision. Reuse of untreated
municipal wastewater Sewage (or domestic sewage, domestic wastewater, municipal wastewater) is a type of wastewater that is produced by a community of people. It is typically transported through a sewer system. Sewage consists of wastewater discharged from residenc ...
has been practiced for many centuries with the objective of diverting
human waste Human waste (or human excreta) refers to the waste products of the human digestive system, menses, and human metabolism including urine and faeces. As part of a sanitation system that is in place, human waste is collected, transported, treated ...
outside of urban settlements. Likewise, land application of domestic wastewater is an old and common practice, which has gone through different stages of development. Domestic wastewater was used for irrigation by prehistoric civilizations (e.g.
Mesopotamia Mesopotamia ''Mesopotamíā''; ar, بِلَاد ٱلرَّافِدَيْن or ; syc, ܐܪܡ ܢܗܪ̈ܝܢ, or , ) is a historical region of Western Asia situated within the Tigris–Euphrates river system, in the northern part of the ...
n,
Indus valley The Indus ( ) is a transboundary river of Asia and a trans-Himalayan river of South and Central Asia. The river rises in mountain springs northeast of Mount Kailash in Western Tibet, flows northwest through the disputed region of Kashmi ...
, and
Minoan The Minoan civilization was a Bronze Age Aegean civilization on the island of Crete and other Aegean Islands, whose earliest beginnings were from 3500BC, with the complex urban civilization beginning around 2000BC, and then declining from 1450B ...
) since the Bronze Age (ca. 3200–1100 BC). Thereafter, wastewater was used for disposal,
irrigation Irrigation (also referred to as watering) is the practice of applying controlled amounts of water to land to help grow crops, landscape plants, and lawns. Irrigation has been a key aspect of agriculture for over 5,000 years and has been develo ...
, and
fertilization Fertilisation or fertilization (see spelling differences), also known as generative fertilisation, syngamy and impregnation, is the fusion of gametes to give rise to a new individual organism or offspring and initiate its development. Proce ...
purposes by Hellenic civilizations and later by Romans in areas surrounding cities (e.g. Athens and Rome).


Bronze and early Iron Ages


Ancient Americas

In
ancient Peru The Andean civilizations were complex societies of many cultures and peoples mainly developed in the river valleys of the coastal deserts of Peru. They stretched from the Andes of southern Colombia southward down the Andes to Chile and northwes ...
, the Nazca people employed a system of interconnected wells and an underground watercourse known as
puquios Puquios (from Quechua ''pukyu'' meaning source, spring, or water well) are ancient systems of subterranean aqueducts which allow water to be transported over long distances in hot dry climates without loss of much of the water to evapora ...
.


Ancient Near East


Mesopotamia

The Mesopotamians introduced the world to clay sewer pipes around 4000 BCE, with the earliest examples found in the Temple of Bel at
Nippur Nippur ( Sumerian: ''Nibru'', often logographically recorded as , EN.LÍLKI, "Enlil City;"The Cambridge Ancient History: Prolegomena & Prehistory': Vol. 1, Part 1. Accessed 15 Dec 2010. Akkadian: ''Nibbur'') was an ancient Sumerian city. It wa ...
and at
Eshnunna Eshnunna (modern Tell Asmar in Diyala Governorate, Iraq) was an ancient Sumerian (and later Akkadian) city and city-state in central Mesopotamia 12.6 miles northwest of Tell Agrab and 15 miles northwest of Tell Ishchali. Although situated in ...
, utilised to remove wastewater from sites, and capture rainwater, in wells. The city of
Uruk Uruk, also known as Warka or Warkah, was an ancient city of Sumer (and later of Babylonia) situated east of the present bed of the Euphrates River on the dried-up ancient channel of the Euphrates east of modern Samawah, Al-Muthannā, Iraq.Harm ...
also demonstrates the first examples of brick constructed
latrine A latrine is a toilet or an even simpler facility that is used as a toilet within a sanitation system. For example, it can be a communal trench in the earth in a camp to be used as emergency sanitation, a hole in the ground ( pit latrine), or ...
s, from 3200 BCE. Clay pipes were later used in the Hittite city of
Hattusa Hattusa (also Ḫattuša or Hattusas ; Hittite: URU''Ḫa-at-tu-ša'', Turkish: Hattuşaş , Hattic: Hattush) was the capital of the Hittite Empire in the late Bronze Age. Its ruins lie near modern Boğazkale, Turkey, within the great loop of ...
. They had easily detachable and replaceable segments, and allowed for cleaning.


Ancient Persia

The first sanitation systems within
prehistoric Iran The prehistory of the Iranian plateau, and the wider region now known as Greater Iran, as part of the prehistory of the Near East is conventionally divided into the Paleolithic, Epipaleolithic, Neolithic, Chalcolithic, Bronze Age and Iron Age per ...
were built near the city of
Zabol Zabol ( fa, , also transliterated as Zâbol or Zābul) is a city and capital of Zabol County, Sistan and Baluchestan Province, Iran. Zabol is near the border with Afghanistan. Referred to as Sistan until the late 1920s, the city was renamed Zab ...
. Persian
qanat A qanat or kārīz is a system for transporting water from an aquifer or water well to the surface, through an underground aqueduct; the system originated approximately 3,000 BC in what is now Iran. The function is essentially the same across ...
s and
ab anbar An ''ab anbar'' ( fa, آب‌انبار, literally "Cistern") is a traditional reservoir or cistern of drinking water in Greater Iran in antiquity. Structure To withstand the pressure the water exerts on the containers of the storage tank, ...
s have been used for water supply and cooling.


Ancient Egypt

The ,
Pyramid of Sahure The pyramid of Sahure () is a pyramid complex built in the late 26th to 25th century BC for the Egyptian pharaoh Sahure of the Fifth Dynasty. It introduced a period of pyramid building by Sahure's successors in Abusir, on a location earlier use ...
, and adjoining temple complex at
Abusir Abusir ( ar, ابو صير  ; Egyptian ''pr wsjr'' cop, ⲃⲟⲩⲥⲓⲣⲓ ' "the House or Temple of Osiris"; grc, Βούσιρις) is the name given to an Egyptian archaeological locality – specifically, an extensive necropolis of ...
, was discovered to have a network of copper drainage pipes.


Ancient East Asia


Ancient China

Some of the earliest evidence of water wells are located in China. The Neolithic Chinese discovered and made extensive use of deep drilled groundwater for drinking. The Chinese text '' The Book of Changes'', originally a divination text of the Western Zhou dynasty (1046–771 BC), contains an entry describing how the ancient Chinese maintained their wells and protected their sources of water. Archaeological evidence and old Chinese documents reveal that the prehistoric and ancient Chinese had the aptitude and skills for digging deep water wells for drinking water as early as 6000 to 7000 years ago. A well excavated at the Hemedu excavation site was believed to have been built during the Neolithic era. The well was caused by four rows of logs with a square frame attached to them at the top of the well. Sixty additional tile wells southwest of Beijing are also believed to have been built around 600 BC for drinking and irrigation. Plumbing is also known to have been used in
East Asia East Asia is the eastern region of Asia, which is defined in both geographical and ethno-cultural terms. The modern states of East Asia include China, Japan, Mongolia, North Korea, South Korea, and Taiwan. China, North Korea, South Korea and ...
since the Qin and
Han Han may refer to: Ethnic groups * Han Chinese, or Han People (): the name for the largest ethnic group in China, which also constitutes the world's largest ethnic group. ** Han Taiwanese (): the name for the ethnic group of the Taiwanese p ...
Dynasties of China.


Indus Valley Civilization

The
Indus Valley civilization The Indus Valley Civilisation (IVC), also known as the Indus Civilisation was a Bronze Age civilisation in the northwestern regions of South Asia, lasting from 3300  BCE to 1300 BCE, and in its mature form 2600 BCE to 1900& ...
in Asia shows early evidence of public water supply and sanitation. The system the Indus developed and managed included a number of advanced features. An exceptional example is the Indus city of
Lothal Lothal () was one of the southernmost sites of the ancient Indus Valley civilisation, located in the Bhāl region of the modern state of Gujarāt. Construction of the city is believed to have begun around 2200 BCE. Archaeological Survey of ...
(c. 2350–1810 BCE). In Lothal the ruler's house had their own private bathing platform and latrine, which was connected to an open street drain that discharged into the towns dock. A number of the other houses of the acropolis had burnished brick bathing platforms, that drained into a covered brick sewer, held together with a gypsum-based mortar, that ran to a soak pit outside the towns walls, while the lower town offered soak jars (large buried urns, with a hole in the bottom to permit liquids to drain), the latter of which were regularly emptied and cleaned. Water was supplied from two wells in the town, one in the acropolis, and the other on the edge of the dock. The urban areas of the Indus Valley civilization included public and private baths. Sewage was disposed through underground drains built with precisely laid bricks, and a sophisticated water management system with numerous reservoirs was established. In the drainage systems, drains from houses were connected to wider public drains. Many of the buildings at Mohenjo-daro had two or more stories. Water from the roof and upper storey bathrooms was carried through enclosed terracotta pipes or open chutes that emptied out onto the street drains. The earliest evidence of urban sanitation was seen in
Harappa Harappa (; Urdu/ pnb, ) is an archaeological site in Punjab, Pakistan, about west of Sahiwal. The Bronze Age Harappan civilisation, now more often called the Indus Valley Civilisation, is named after the site, which takes its name from a mode ...
,
Mohenjo-daro Mohenjo-daro (; sd, موئن جو دڙو'', ''meaning 'Mound of the Dead Men';Rakhigarhi Rakhigarhi or Rakhi Garhi is a village and an archaeological site belonging to the Indus Valley civilisation in Hisar District of the northern Indian state of Haryana, situated about 150 km northwest of Delhi. It was part of the mature ph ...
of Indus Valley civilization. This urban plan included the world's first urban sanitation systems. Within the city, individual homes or groups of homes obtained water from
wells Wells most commonly refers to: * Wells, Somerset, a cathedral city in Somerset, England * Well, an excavation or structure created in the ground * Wells (name) Wells may also refer to: Places Canada * Wells, British Columbia England * Wel ...
. From a room that appears to have been set aside for bathing, waste water was directed to covered drains, which lined the major streets. Devices such as
shadoof A shadoof or shaduf (from the Arabic word , ''šādūf'') is an irrigation tool. It is highly efficient, and has been known since 3000 BCE. Names It is also called a lift, well pole, well sweep, or simply a sweep in the US.Knight, Edward Henry ...
s were used to lift water to ground level. Ruins from the Indus Valley Civilization like
Mohenjo-daro Mohenjo-daro (; sd, موئن جو دڙو'', ''meaning 'Mound of the Dead Men';Dholavira Dholavira ( gu, ધોળાવીરા) is an archaeological site at Khadirbet in Bhachau Taluka of Kutch District, in the state of Gujarat in western India, which has taken its name from a modern-day village south of it. This village is ...
in
Gujarat Gujarat (, ) is a state along the western coast of India. Its coastline of about is the longest in the country, most of which lies on the Kathiawar peninsula. Gujarat is the fifth-largest Indian state by area, covering some ; and the ninth- ...
in India had settlements with some of the ancient world's most sophisticated sewage systems. They included drainage channels,
rainwater harvesting Rainwater harvesting (RWH) is the collection and storage of rain, rather than allowing it to run off. Rainwater is collected from a roof-like surface and redirected to a tank, cistern, deep pit (well, shaft, or borehole), aquifer, or a reservoir ...
, and street ducts.
Stepwell Stepwells (also known as vavs or baori) are wells or ponds with a long corridor of steps that descend to the water level. Stepwells played a significant role in defining subterranean architecture in western India from 7th to 19th century. So ...
s have mainly been used in the Indian subcontinent.


Ancient Mediterranean


Ancient Greece

The ancient Greek civilization of
Crete Crete ( el, Κρήτη, translit=, Modern: , Ancient: ) is the largest and most populous of the Greek islands, the 88th largest island in the world and the fifth largest island in the Mediterranean Sea, after Sicily, Sardinia, Cypru ...
, known as the
Minoan civilization The Minoan civilization was a Bronze Age Aegean civilization on the island of Crete and other Aegean Islands, whose earliest beginnings were from 3500BC, with the complex urban civilization beginning around 2000BC, and then declining from 1450B ...
, built advanced underground clay pipes for sanitation and water supply. Their capital,
Knossos Knossos (also Cnossos, both pronounced ; grc, Κνωσός, Knōsós, ; Linear B: ''Ko-no-so'') is the largest Bronze Age archaeological site on Crete and has been called Europe's oldest city. Settled as early as the Neolithic period, the na ...
, had a well-organized water system for bringing in clean water, taking out waste water and storm sewage canals for overflow when there was heavy rain. People constructed flushed toilets in ancient Crete, like in ancient Egypt and before them at places of the Indus Civilization, with the facilities on Crete possibly having a first
flush Flush may refer to: Places * Flush, Kansas, a community in the United States Architecture, construction and manufacturing * Flush cut, a type of cut made with a French flush-cut saw or diagonal pliers * Flush deck, in naval architecture * F ...
installation for pouring water into, dating back to 16th century BC. These Minoan sanitation facilities were connected to stone sewers that were regularly flushed by rain, flowing in through the collection system. In addition to sophisticated water and sewer systems they devised elaborate heating systems. The Ancient Greeks of Athens and
Asia Minor Anatolia, tr, Anadolu Yarımadası), and the Anatolian plateau, also known as Asia Minor, is a large peninsula in Western Asia and the westernmost protrusion of the Asian continent. It constitutes the major part of modern-day Turkey. The re ...
also used an indoor plumbing system, used for pressurized showers. The Greek inventor
Heron The herons are long-legged, long-necked, freshwater and coastal birds in the family Ardeidae, with 72 recognised species, some of which are referred to as egrets or bitterns rather than herons. Members of the genera ''Botaurus'' and ''Ixobrychu ...
used pressurized piping for fire fighting purposes in the City of
Alexandria Alexandria ( or ; ar, ٱلْإِسْكَنْدَرِيَّةُ ; grc-gre, Αλεξάνδρεια, Alexándria) is the second largest city in Egypt, and the largest city on the Mediterranean coast. Founded in by Alexander the Great, Alexandri ...
. The Mayans were the third earliest civilization to have employed a system of indoor plumbing using pressurized water. An inverted siphon system, along with glass covered clay pipes, was used for the first time in the palaces of Crete, Greece. It is still in working condition, after about 3000 years.


Roman Empire

In ancient Rome, the
Cloaca Maxima The Cloaca Maxima ( lat, Cloāca Maxima, lit. ''Greatest Sewer'') was one of the world's earliest sewage systems. Its name derives from Cloacina, a Roman goddess. Built during either the Roman Kingdom or early Roman Republic, it was construct ...
, considered a marvel of engineering, discharged into the
Tiber The Tiber ( ; it, Tevere ; la, Tiberis) is the third-longest river in Italy and the longest in Central Italy, rising in the Apennine Mountains in Emilia-Romagna and flowing through Tuscany, Umbria, and Lazio, where it is joined by the Ri ...
. Public
latrine A latrine is a toilet or an even simpler facility that is used as a toilet within a sanitation system. For example, it can be a communal trench in the earth in a camp to be used as emergency sanitation, a hole in the ground ( pit latrine), or ...
s were built over the Cloaca Maxima. Beginning in the
Roman era In modern historiography, ancient Rome refers to Roman civilisation from the founding of the city of Rome in the 8th century BC to the collapse of the Western Roman Empire in the 5th century AD. It encompasses the Roman Kingdom (753–509 BC ...
a
water wheel A water wheel is a machine for converting the energy of flowing or falling water into useful forms of power, often in a watermill. A water wheel consists of a wheel (usually constructed from wood or metal), with a number of blades or bucke ...
device known as a
noria A noria ( ar, ناعورة, ''nā‘ūra'', plural ''nawāʿīr'', from syr, ܢܥܘܪܐ, ''nā‘orā'', lit. "growler") is a hydropowered ''scoop wheel'' used to lift water into a small aqueduct, either for the purpose of irrigation or to su ...
supplied water to
aqueducts Aqueduct may refer to: Structures *Aqueduct (bridge), a bridge to convey water over an obstacle, such as a ravine or valley *Navigable aqueduct, or water bridge, a structure to carry navigable waterway canals over other rivers, valleys, railw ...
and other water distribution systems in major cities in Europe and the Middle East. The
Roman Empire The Roman Empire ( la, Imperium Romanum ; grc-gre, Βασιλεία τῶν Ῥωμαίων, Basileía tôn Rhōmaíōn) was the post-Roman Republic, Republican period of ancient Rome. As a polity, it included large territorial holdings aro ...
had
indoor plumbing Tap water (also known as faucet water, running water, or municipal water) is water supplied through a tap, a water dispenser valve. In many countries, tap water usually has the quality of drinking water. Tap water is commonly used for drinking, ...
, meaning a system of aqueducts and pipes that terminated in homes and at public wells and fountains for people to use. Rome and other nations used
lead Lead is a chemical element with the symbol Pb (from the Latin ) and atomic number 82. It is a heavy metal that is denser than most common materials. Lead is soft and malleable, and also has a relatively low melting point. When freshly cut, l ...
pipes; while commonly thought to be the cause of lead poisoning in the Roman Empire, the combination of running water which did not stay in contact with the pipe for long and the deposition of precipitation scale actually mitigated the risk from lead pipes. Roman towns and garrisons in the
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Nor ...
between 46 BC and 400 AD had complex sewer networks sometimes constructed out of hollowed-out
elm Elms are deciduous and semi-deciduous trees comprising the flowering plant genus ''Ulmus'' in the plant family Ulmaceae. They are distributed over most of the Northern Hemisphere, inhabiting the temperate and tropical-montane regions of North ...
logs, which were shaped so that they butted together with the down-stream pipe providing a socket for the upstream pipe.


Medieval and early modern ages


Nepal

In Nepal the construction of water conduits like drinking fountains and wells is considered a pious act.UN-HABITAT, 2007. Water Movement in Patan with reference to Traditional Stone Spouts
,
Water Nepal: A Historical Perspective
GWP Nepal / Jalsrot Vikas Sanstha, September 2018, retrieved 11 September 2019
A drinking water supply system was developed starting at least as early as 550 AD.Disaster Risk Management for the Historic City of Patan, Nepal
by Rits-DMUCH, Ritsumeikan University, Kyoto, Japan and Institute of Engineering, Tribhuvan University,Kathmandu, Nepal, 2012, retrieved 16 September 2019
This ''
dhunge dhara A dhunge dhara ( ) or hiti ( Newari: ) is a traditional stone drinking fountain found in Nepal. It is an intricately carved stone waterway through which water flows uninterrupted from underground sources. Dhunge dharas are part of a comprehensive d ...
'' or ''hiti'' system consists of carved stone fountains through which water flows uninterrupted from underground sources. These are supported by numerous ponds and canals that form an elaborate network of water bodies, created as a water resource during the dry season and to help alleviate the water pressure caused by the monsoon rains. After the introduction of modern, piped water systems, starting in the late 19th century, this old system has fallen into disrepair and some parts of it are lost forever. Nevertheless, many people of Nepal still rely on the old hitis on a daily basis.Traditional stonespouts
Posted by Administrator of NGOforum.net, 28 September 2010. Retrieved 6 September 2019.
In 2008 the dhunge dharas of the Kathmandu Valley produced 2.95 million
litre The litre (international spelling) or liter (American English spelling) (SI symbols L and l, other symbol used: ℓ) is a metric unit of volume. It is equal to 1 cubic decimetre (dm3), 1000 cubic centimetres (cm3) or 0.001 cubic metre (m3) ...
s of water per day.Kathmandu Valley Groundwater Outlook
. Shrestha S., Pradhananga D., Pandey V.P. (Eds.), 2012, Asian Institute of Technology (AIT), The Small Earth Nepal (SEN), Center of Research for Environment Energy and Water (CREEW), International Research Center for River Basin Environment-University of Yamanashi (ICRE-UY), Kathmandu, Nepal
Of the 389 stone spouts found in the Kathmandu Valley in 2010, 233 were still in use, serving about 10% of Kathmandu's population. 68 had gone dry, 45 were lost entirely and 43 were connected to the municipal water supply instead of their original source.


Islamic world

Islam Islam (; ar, ۘالِإسلَام, , ) is an Abrahamic monotheistic religion centred primarily around the Quran, a religious text considered by Muslims to be the direct word of God (or '' Allah'') as it was revealed to Muhammad, the ...
stresses the importance of cleanliness and personal hygiene.
Islamic hygienical jurisprudence Purity ( ar, طهارة, ''ṭahāra(h)'') is an essential aspect of Islam. It is the opposite of ''najāsa'', the state of being ritually impure. It is achieved by first removing physical impurities (for example, urine) from the body, and then ...
, which dates back to the 7th century, has a number of elaborate rules.
Taharah Purity ( ar, طهارة, ''ṭahāra(h)'') is an essential aspect of Islam. It is the opposite of ''najāsa'', the state of being ritually impure. It is achieved by first removing physical impurities (for example, urine) from the body, and then ...
(ritual purity) involves performing
wudu Wuḍūʾ ( ar, الوضوء ' ) is the Islamic procedure for cleansing parts of the body, a type of ritual purification, or ablution. The 4 Fardh (Mandatory) acts of ''Wudu'' consists of washing the face, arms, then wiping the head and the feet ...
(ablution) for the five daily salah (prayers), as well as regularly performing
ghusl ( ar, غسل ', ) is an Arabic term to the full-body ritual purification mandatory before the performance of various rituals and prayers, for any adult Muslim after sexual intercourse/ejaculation or completion of the menstrual cycle. The washin ...
(bathing), which led to bathhouses being built across the
Islamic world The terms Muslim world and Islamic world commonly refer to the Islamic community, which is also known as the Ummah. This consists of all those who adhere to the religious beliefs and laws of Islam or to societies in which Islam is practiced. In ...
. Islamic toilet hygiene also requires washing with water after using the toilet, for purity and to minimize germs. In the
Abbasid Caliphate The Abbasid Caliphate ( or ; ar, الْخِلَافَةُ الْعَبَّاسِيَّة, ') was the third caliphate to succeed the Islamic prophet Muhammad. It was founded by a dynasty descended from Muhammad's uncle, Abbas ibn Abdul-Muttalib ...
(8th-13th centuries), its capital city of
Baghdad Baghdad (; ar, بَغْدَاد , ) is the capital of Iraq and the second-largest city in the Arab world after Cairo. It is located on the Tigris near the ruins of the ancient city of Babylon and the Sassanid Persian capital of Ctesiphon ...
(Iraq) had 65,000 baths, along with a sewer system. Cities of the
medieval Islamic world The Islamic Golden Age was a period of cultural, economic, and scientific flourishing in the history of Islam, traditionally dated from the 8th century to the 14th century. This period is traditionally understood to have begun during the reign ...
had
water supply system A water supply network or water supply system is a system of engineered hydrologic and hydraulic components that provide water supply. A water supply system typically includes the following: # A drainage basin (see water purification – source ...
s powered by
hydraulic Hydraulics (from Greek: Υδραυλική) is a technology and applied science using engineering, chemistry, and other sciences involving the mechanical properties and use of liquids. At a very basic level, hydraulics is the liquid counter ...
technology that supplied
drinking water Drinking water is water that is used in drink or food preparation; potable water is water that is safe to be used as drinking water. The amount of drinking water required to maintain good health varies, and depends on physical activity level, ag ...
along with much greater quantities of water for ritual washing, mainly in
mosques A mosque (; from ar, مَسْجِد, masjid, ; literally "place of ritual prostration"), also called masjid, is a place of prayer for Muslims. Mosques are usually covered buildings, but can be any place where prayers (sujud) are performed, in ...
and hammams (baths). Bathing establishments in various cities were rated by Arabic writers in
travel guide A guide book or travel guide is "a book of information about a place designed for the use of visitors or tourists". It will usually include information about sights, accommodation, restaurants, transportation, and activities. Maps of varying det ...
s. Medieval Islamic cities such as Baghdad, Córdoba (
Islamic Spain Al-Andalus translit. ; an, al-Andalus; ast, al-Ándalus; eu, al-Andalus; ber, ⴰⵏⴷⴰⵍⵓⵙ, label=Berber, translit=Andalus; ca, al-Àndalus; gl, al-Andalus; oc, Al Andalús; pt, al-Ândalus; es, al-Ándalus () was the Mus ...
),
Fez Fez most often refers to: * Fez (hat), a type of felt hat commonly worn in the Ottoman Empire * Fez, Morocco (or Fes), the second largest city of Morocco Fez or FEZ may also refer to: Media * ''Fez'' (Frank Stella), a 1964 painting by the moder ...
(Morocco) and
Fustat Fusṭāṭ ( ar, الفُسطاط ''al-Fusṭāṭ''), also Al-Fusṭāṭ and Fosṭāṭ, was the first capital of Egypt under Muslim rule, and the historical centre of modern Cairo. It was built adjacent to what is now known as Old Cairo by ...
(Egypt) also had sophisticated
waste disposal Waste management or waste disposal includes the processes and actions required to manage waste from its inception to its final disposal. This includes the collection, transport, treatment and disposal of waste, together with monitorin ...
and
sewage system Sewerage (or sewage system) is the infrastructure that conveys sewage or surface runoff (stormwater, meltwater, rainwater) using sewers. It encompasses components such as receiving drains, manholes, pumping stations, storm overflows, and scre ...
s with interconnected networks of sewers. The city of Fustat also had multi-storey
tenement A tenement is a type of building shared by multiple dwellings, typically with flats or apartments on each floor and with shared entrance stairway access. They are common on the British Isles, particularly in Scotland. In the medieval Old Town, i ...
buildings (with up to six floors) with
flush toilet A flush toilet (also known as a flushing toilet, water closet (WC) – see also toilet names) is a toilet that disposes of human waste (principally urine and feces) by using the force of water to ''flush'' it through a drainpipe to another loca ...
s, which were connected to a water supply system, and
flue A flue is a duct, pipe, or opening in a chimney for conveying exhaust gases from a fireplace, furnace, water heater, boiler, or generator to the outdoors. Historically the term flue meant the chimney itself. In the United States, they are ...
s on each floor carrying waste to underground channels.
Al-Karaji ( fa, ابو بکر محمد بن الحسن الکرجی; c. 953 – c. 1029) was a 10th-century Persian mathematician and engineer who flourished at Baghdad. He was born in Karaj, a city near Tehran. His three principal surviving works are ...
(c. 953–1029) wrote a book, ''The Extraction of Hidden Waters'', which presented ground-breaking ideas and descriptions of hydrological and hydrogeological perceptions such as components of the hydrological cycle, groundwater quality, and driving factors of groundwater flow. He also gave an early description of a
water filtration A water filter removes impurities by lowering contamination of water using a fine physical barrier, a chemical process, or a biological process. Filters cleanse water to different extents, for purposes such as: providing agricultural irrigation ...
process.


Sub-Saharan Africa

In post-classical
Kilwa Kilwa Kisiwani (English: ''Kilwa Island'') is an island, national historic site, and hamlet community located in the township of Kilwa Masoko, the district seat of Kilwa District in the Tanzanian region of Lindi Region in southern Tanzania. Ki ...
plumbing was prevalent in the stone homes of the natives. The Husani Kubwa Palace as well as other buildings for the ruling elite and wealthy included the luxury of indoor plumbing. In the
Ashanti Empire The Asante Empire ( Asante Twi: ), today commonly called the Ashanti Empire, was an Akan state that lasted between 1701 to 1901, in what is now modern-day Ghana. It expanded from the Ashanti Region to include most of Ghana as well as parts of ...
, toilets were housed in two story buildings that were flushed with gallons of boiling water.


Medieval Europe

Christianity places an emphasis on hygiene. Despite the denunciation of the
mixed bathing Mixed bathing is the sharing of a pool, beach or other place by swimmers of both sexes. Mixed bathing usually refers to swimming or other water-based recreational activities in public or semi-public facilities, such as hotel or holiday resort pool ...
style of Roman pools by
early Christian Early Christianity (up to the First Council of Nicaea in 325) spread from the Levant, across the Roman Empire, and beyond. Originally, this progression was closely connected to already established Jewish centers in the Holy Land and the Jewish ...
clergy, as well as the pagan custom of women naked bathing in front of men, this did not stop the Church from urging its followers to go to public baths for bathing, which contributed to hygiene and good health according to the
Church Father The Church Fathers, Early Church Fathers, Christian Fathers, or Fathers of the Church were ancient and influential Christian theologians and writers who established the intellectual and doctrinal foundations of Christianity. The historical pe ...
s,
Clement of Alexandria Titus Flavius Clemens, also known as Clement of Alexandria ( grc , Κλήμης ὁ Ἀλεξανδρεύς; – ), was a Christian theologian and philosopher who taught at the Catechetical School of Alexandria. Among his pupils were Origen an ...
and
Tertullian Tertullian (; la, Quintus Septimius Florens Tertullianus; 155 AD – 220 AD) was a prolific early Christian author from Carthage in the Roman province of Africa. He was the first Christian author to produce an extensive corpus of La ...
. The Church built
public bathing Public baths originated when most people in population centers did not have access to private bathing facilities. Though termed "public", they have often been restricted according to gender, religious affiliation, personal membership, and other cr ...
facilities that were separate for both sexes near
monasteries A monastery is a building or complex of buildings comprising the domestic quarters and workplaces of monastics, monks or nuns, whether living in communities or alone (hermits). A monastery generally includes a place reserved for prayer which m ...
and pilgrimage sites; also, the
popes The pope ( la, papa, from el, πάππας, translit=pappas, 'father'), also known as supreme pontiff ( or ), Roman pontiff () or sovereign pontiff, is the bishop of Rome (or historically the patriarch of Rome), head of the worldwide Cathol ...
situated baths within church
basilica In Ancient Roman architecture, a basilica is a large public building with multiple functions, typically built alongside the town's forum. The basilica was in the Latin West equivalent to a stoa in the Greek East. The building gave its name t ...
s and monasteries since the early Middle Ages. Pope
Gregory the Great Pope Gregory I ( la, Gregorius I; – 12 March 604), commonly known as Saint Gregory the Great, was the bishop of Rome from 3 September 590 to his death. He is known for instigating the first recorded large-scale mission from Rome, the Gregor ...
urged his followers on value of
bathing Bathing is the act of washing the body, usually with water, or the immersion of the body in water. It may be practiced for personal hygiene, religious ritual or therapeutic purposes. By analogy, especially as a recreational activity, the term is ...
as a bodily need. Contrary to popular belief
bathing Bathing is the act of washing the body, usually with water, or the immersion of the body in water. It may be practiced for personal hygiene, religious ritual or therapeutic purposes. By analogy, especially as a recreational activity, the term is ...
and
sanitation Sanitation refers to public health conditions related to clean drinking water and treatment and disposal of human excreta and sewage. Preventing human contact with feces is part of sanitation, as is hand washing with soap. Sanitation systems ...
were not lost in Europe with the collapse of the
Roman Empire The Roman Empire ( la, Imperium Romanum ; grc-gre, Βασιλεία τῶν Ῥωμαίων, Basileía tôn Rhōmaíōn) was the post-Roman Republic, Republican period of ancient Rome. As a polity, it included large territorial holdings aro ...
. Public bathhouses were common in medieval
Christendom Christendom historically refers to the Christian states, Christian-majority countries and the countries in which Christianity dominates, prevails,SeMerriam-Webster.com : dictionary, "Christendom"/ref> or is culturally or historically intertwin ...
larger towns and cities such as Constantinople,
Paris Paris () is the capital and most populous city of France, with an estimated population of 2,165,423 residents in 2019 in an area of more than 105 km² (41 sq mi), making it the 30th most densely populated city in the world in 2020. S ...
,
Regensburg Regensburg or is a city in eastern Bavaria, at the confluence of the Danube, Naab and Regen rivers. It is capital of the Upper Palatinate subregion of the state in the south of Germany. With more than 150,000 inhabitants, Regensburg is the ...
,
Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus (Romulus and Remus, legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg ...
and
Naples Naples (; it, Napoli ; nap, Napule ), from grc, Νεάπολις, Neápolis, lit=new city. is the regional capital of Campania and the third-largest city of Italy, after Rome and Milan, with a population of 909,048 within the city's admini ...
. And great bathhouses were built in Byzantine centers such as Constantinople and
Antioch Antioch on the Orontes (; grc-gre, Ἀντιόχεια ἡ ἐπὶ Ὀρόντου, ''Antiókheia hē epì Oróntou'', Learned ; also Syrian Antioch) grc-koi, Ἀντιόχεια ἡ ἐπὶ Ὀρόντου; or Ἀντιόχεια ἡ ἐπ� ...
. There is little record of other sanitation systems (apart of
sanitation in ancient Rome Sanitation in ancient Rome, acquired from the Etruscans, was well advanced compared to other ancient cities and provided water supply and sanitation services to residents of Rome. Although there were many sewers, public latrines, baths and other s ...
) in most of Europe until the
High Middle Ages The High Middle Ages, or High Medieval Period, was the period of European history that lasted from AD 1000 to 1300. The High Middle Ages were preceded by the Early Middle Ages and were followed by the Late Middle Ages, which ended around AD 1500 ...
. Unsanitary conditions and overcrowding were widespread throughout Europe and
Asia Asia (, ) is one of the world's most notable geographical regions, which is either considered a continent in its own right or a subcontinent of Eurasia, which shares the continental landmass of Afro-Eurasia with Africa. Asia covers an area ...
during the
Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the post-classical period of global history. It began with the fall of the Western Roman Empire a ...
. This resulted in
pandemic A pandemic () is an epidemic of an infectious disease that has spread across a large region, for instance multiple continents or worldwide, affecting a substantial number of individuals. A widespread endemic disease with a stable number of in ...
s such as the
Plague of Justinian The plague of Justinian or Justinianic plague (541–549 AD) was the first recorded major outbreak of the first plague pandemic, the first Old World pandemic of plague, the contagious disease caused by the bacterium ''Yersinia pestis''. The dise ...
(541–542) and the
Black Death The Black Death (also known as the Pestilence, the Great Mortality or the Plague) was a bubonic plague pandemic occurring in Western Eurasia and North Africa from 1346 to 1353. It is the most fatal pandemic recorded in human history, causing ...
(1347–1351), which killed tens of millions of people. Very high infant and child mortality prevailed in Europe throughout
medieval In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the post-classical period of global history. It began with the fall of the Western Roman Empire a ...
times, due partly to deficiencies in sanitation. In medieval European cities, small natural waterways used for carrying off
wastewater Wastewater is water generated after the use of freshwater, raw water, drinking water or saline water in a variety of deliberate applications or processes. Another definition of wastewater is "Used water from any combination of domestic, industrial ...
were eventually covered over and functioned as sewers.
London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major s ...
's
River Fleet The River Fleet is the largest of London's subterranean rivers, all of which today contain foul water for treatment. Its headwaters are two streams on Hampstead Heath, each of which was dammed into a series of ponds—the Hampstead Ponds an ...
is such a system. Open drains, or gutters, for waste water run-off ran along the center of some streets. These were known as "kennels" (i.e., canals, channels), and in Paris were sometimes known as “split streets,” as the waste water running along the middle physically split the streets into two halves. The first closed sewer constructed in Paris was designed by Hugues Aubird in 1370 on
Rue Montmartre Boulevard Montmartre is one of the four grands boulevards of Paris. It was constructed in 1763. Contrary to what its name may suggest, the road is not situated on the hills of Montmartre. It is the easternmost of the grand boulevards. History I ...
(Montmartre Street), and was 300 meters long. The original purpose of designing and constructing a closed sewer in Paris was less-so for waste management as much as it was to hold back the stench coming from the odorous waste water.George Commair, "The Waste Water Network: and underground view of Paris," in Great Rivers History: Proceedings and Invited Papers for the EWRI Congress and History Symposium, May 17–19, 2009, Kansas City, Missouri, ed. Jerry R. Roger, (Reston: American Society of Civil Engineers, 2009), 91–96 In
Dubrovnik Dubrovnik (), historically known as Ragusa (; see notes on naming), is a city on the Adriatic Sea in the region of Dalmatia, in the southeastern semi-exclave of Croatia. It is one of the most prominent tourist destinations in the Mediterranea ...
, then known as Ragusa (Latin name), the Statute of 1272 set out the parameters for the construction of septic tanks and channels for the removal of dirty water. Throughout the 14th and 15th century the sewage system was built, and it is still operational today, with minor changes and repairs done in recent centuries.
Pail closet A pail closet or pail privy was a room used for the disposal of human excreta, under the "pail system" (or Rochdale system) of waste removal. The "closet" (a word which had long meant "toilet" in one usage) was a small outhouse (privy) which con ...
s,
outhouse An outhouse is a small structure, separate from a main building, which covers a toilet. This is typically either a pit latrine or a bucket toilet, but other forms of dry (non-flushing) toilets may be encountered. The term may also be used ...
s, and
cesspit A cesspit (or cesspool or soak pit in some contexts) is a term with various meanings: it is used to describe either an underground holding tank (sealed at the bottom) or a soak pit (not sealed at the bottom). It can be used for the temporary co ...
s were used to collect human waste. The use of human waste as
fertilizer A fertilizer (American English) or fertiliser (British English; see spelling differences) is any material of natural or synthetic origin that is applied to soil or to plant tissues to supply plant nutrients. Fertilizers may be distinct from ...
was especially important in China and Japan, where cattle manure was less available. However, most cities did not have a functioning sewer system before the
Industrial era The Industrial Revolution was the transition to new manufacturing processes in Great Britain, continental Europe, and the United States, that occurred during the period from around 1760 to about 1820–1840. This transition included going fr ...
, relying instead on nearby rivers or occasional
rain Rain is water droplets that have condensed from atmospheric water vapor and then fall under gravity. Rain is a major component of the water cycle and is responsible for depositing most of the fresh water on the Earth. It provides water fo ...
showers to wash away the sewage from the streets . In some places,
waste water Wastewater is water generated after the use of freshwater, raw water, drinking water or saline water in a variety of deliberate applications or processes. Another definition of wastewater is "Used water from any combination of domestic, industrial ...
simply ran down the streets, which had
stepping stones Stepping stones or stepstones are sets of stones arranged to form an improvised causeway that allows a pedestrian to cross a natural watercourse such as a river; or a water feature in a garden where water is allowed to flow between stone steps. ...
to keep pedestrians out of the muck, and eventually drained as runoff into the local watershed. In the 16th century, Sir John Harington invented a flush toilet as a device for
Queen Elizabeth I Elizabeth I (7 September 153324 March 1603) was Queen of England and Ireland from 17 November 1558 until her death in 1603. Elizabeth was the last of the five House of Tudor monarchs and is sometimes referred to as the "Virgin Queen". Eli ...
(his godmother) that released wastes into
cesspool A cesspit (or cesspool or soak pit in some contexts) is a term with various meanings: it is used to describe either an underground holding tank (sealed at the bottom) or a soak pit (not sealed at the bottom). It can be used for the temporary co ...
s. After the adoption of
gunpowder Gunpowder, also commonly known as black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive. It consists of a mixture of sulfur, carbon (in the form of charcoal) and potassium nitrate (saltpeter). Th ...
, municipal outhouses became an important source of raw material for the making of
saltpeter Potassium nitrate is a chemical compound with the chemical formula . This alkali metal nitrate salt is also known as Indian saltpetre (large deposits of which were historically mined in India). It is an ionic salt of potassium ions K+ and nitra ...
in European countries. In London, the contents of the city's outhouses were collected every night by commissioned wagons and delivered to the nitrite beds where it was laid into specially designed soil beds to produce earth rich in mineral nitrates. The nitrate rich-earth would be then further processed to produce saltpeter, or
potassium nitrate Potassium nitrate is a chemical compound with the chemical formula . This alkali metal nitrate salt is also known as Indian saltpetre (large deposits of which were historically mined in India). It is an ionic salt of potassium ions K+ and nitra ...
, an important ingredient in
black powder Gunpowder, also commonly known as black powder to distinguish it from modern smokeless powder, is the earliest known chemical explosive. It consists of a mixture of sulfur, carbon (in the form of charcoal) and potassium nitrate (saltpeter). Th ...
that played a part in the making of gunpowder.


Classic and early modern Mesoamerica

The
Classic Maya A classic is an outstanding example of a particular style; something of lasting worth or with a timeless quality; of the first or highest quality, class, or rank – something that exemplifies its class. The word can be an adjective (a '' ...
at
Palenque Palenque (; Yucatec Maya: ), also anciently known in the Itza Language as Lakamhaʼ ("Big Water or Big Waters"), was a Maya city state in southern Mexico that perished in the 8th century. The Palenque ruins date from ca. 226 BC to ca. 799 AD. A ...
had underground aqueducts and
flush toilet A flush toilet (also known as a flushing toilet, water closet (WC) – see also toilet names) is a toilet that disposes of human waste (principally urine and feces) by using the force of water to ''flush'' it through a drainpipe to another loca ...
s; the Classic Maya even used household water filters using locally abundant limestone carved into a porous cylinder, made so as to work in a manner strikingly similar to Modern ceramic water filters. In
Spain , image_flag = Bandera de España.svg , image_coat = Escudo de España (mazonado).svg , national_motto = ''Plus ultra'' (Latin)(English: "Further Beyond") , national_anthem = (English: "Royal March") , i ...
and
Spanish America Spanish America refers to the Spanish territories in the Americas during the Spanish colonization of the Americas. The term "Spanish America" was specifically used during the territories' imperial era between 15th and 19th centuries. To the e ...
, a community operated watercourse known as an acequia, combined with a simple sand filtration system, provided
potable Drinking water is water that is used in drink or food preparation; potable water is water that is safe to be used as drinking water. The amount of drinking water required to maintain good health varies, and depends on physical activity level, ag ...
water.


Sewage farms for disposal and irrigation

Sewage farm Sewage farms use sewage for irrigation and fertilizing agricultural land. The practice is common in warm, arid climates where irrigation is valuable while sources of fresh water are scarce. Suspended solids may be converted to humus by microbes a ...
s” (i.e. wastewater application to the land for disposal and agricultural use) were operated in Bunzlau (Silesia) in 1531, in Edinburgh (Scotland) in 1650, in Paris (France) in 1868, in Berlin (Germany) in 1876 and in different parts of the USA since 1871, where wastewater was used for beneficial crop production. In the following centuries (16th and 18th centuries) in many rapidly growing countries/cities of Europe (e.g. Germany, France) and the United States, “sewage farms” were increasingly seen as a solution for the disposal of large volumes of the wastewater, some of which are still in operation today. Irrigation with sewage and other wastewater effluents has a long history also in China and India; while also a large “sewage farm” was established in Melbourne, Australia, in 1897.


Modern age


Water supply

Until the
Enlightenment era The Age of Enlightenment or the Enlightenment; german: Aufklärung, "Enlightenment"; it, L'Illuminismo, "Enlightenment"; pl, Oświecenie, "Enlightenment"; pt, Iluminismo, "Enlightenment"; es, La Ilustración, "Enlightenment" was an intel ...
, little progress was made in water supply and sanitation and the engineering skills of the Romans were largely neglected throughout Europe. It was in the 18th century that a rapidly growing population fueled a boom in the establishment of private
water supply network A water supply network or water supply system is a system of engineered hydrologic and hydraulic components that provide water supply. A water supply system typically includes the following: # A drainage basin (see water purification – source ...
s in
London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major s ...
.
London water supply infrastructure London's water supply infrastructure has developed over the centuries in line with the expansion of London. For much of London's history, private companies supplied fresh water to various parts of London from wells, the River Thames and the Rive ...
developed over many centuries from early mediaeval conduits, through major 19th-century treatment works built in response to
cholera Cholera is an infection of the small intestine by some strains of the bacterium ''Vibrio cholerae''. Symptoms may range from none, to mild, to severe. The classic symptom is large amounts of watery diarrhea that lasts a few days. Vomiting and ...
threats, to modern, large-scale reservoirs. The first screw-down
water tap A tap (also spigot or faucet: see usage variations) is a valve controlling the release of a liquid or gas. Nomenclature United Kingdom * Tap is used in the United Kingdom and most of the Commonwealth for any everyday type of valve, partic ...
was patented in 1845 by Guest and Chrimes, a brass foundry in
Rotherham Rotherham () is a large minster and market town in South Yorkshire, England. The town takes its name from the River Rother which then merges with the River Don. The River Don then flows through the town centre. It is the main settlement of ...
. The first documented use of
sand filter Sand filters are used as a step in the water treatment process of water purification. There are three main types; rapid (gravity) sand filters, upward flow sand filters and slow sand filters. All three methods are used extensively in the water i ...
s to purify the water supply dates to 1804, when the owner of a bleachery in
Paisley, Scotland Paisley ( ; sco, Paisley, gd, Pàislig ) is a large town situated in the west central Lowlands of Scotland. Located north of the Gleniffer Braes, the town borders the city of Glasgow to the east, and straddles the banks of the White Cart Water ...
, John Gibb, installed an experimental filter, selling his unwanted surplus to the public. The first treated public water supply in the world was installed by engineer James Simpson for the
Chelsea Waterworks Company The Chelsea Waterworks Company was a London waterworks company founded in 1723 which supplied water to many central London locations throughout the 18th and 19th centuries until its functions were taken over by the Metropolitan Water Board in ...
in London in 1829. The practice of water treatment soon became mainstream, and the virtues of the system were made starkly apparent after the investigations of the physician
John Snow John Snow (15 March 1813 – 16 June 1858) was an English physician and a leader in the development of anaesthesia and medical hygiene. He is considered one of the founders of modern epidemiology, in part because of his work in tracing the so ...
during the 1854 Broad Street cholera outbreak demonstrated the role of the water supply in spreading the cholera epidemic.


Sewer systems

A significant development was the construction of a network of sewers to collect wastewater. In some cities, including
Rome , established_title = Founded , established_date = 753 BC , founder = King Romulus (Romulus and Remus, legendary) , image_map = Map of comune of Rome (metropolitan city of Capital Rome, region Lazio, Italy).svg ...
,
Istanbul ) , postal_code_type = Postal code , postal_code = 34000 to 34990 , area_code = +90 212 (European side) +90 216 (Asian side) , registration_plate = 34 , blank_name_sec2 = GeoTLD , blank_in ...
( Constantinople) and
Fustat Fusṭāṭ ( ar, الفُسطاط ''al-Fusṭāṭ''), also Al-Fusṭāṭ and Fosṭāṭ, was the first capital of Egypt under Muslim rule, and the historical centre of modern Cairo. It was built adjacent to what is now known as Old Cairo by ...
, networked ancient sewer systems continue to function today as collection systems for those cities' modernized sewer systems. Instead of flowing to a river or the sea, the pipes have been re-routed to modern sewer treatment facilities. Basic sewer systems were used for waste removal in ancient
Mesopotamia Mesopotamia ''Mesopotamíā''; ar, بِلَاد ٱلرَّافِدَيْن or ; syc, ܐܪܡ ܢܗܪ̈ܝܢ, or , ) is a historical region of Western Asia situated within the Tigris–Euphrates river system, in the northern part of the ...
, where vertical shafts carried the waste away into cesspools. Similar systems existed in the
Indus Valley The Indus ( ) is a transboundary river of Asia and a trans-Himalayan river of South and Central Asia. The river rises in mountain springs northeast of Mount Kailash in Western Tibet, flows northwest through the disputed region of Kashmi ...
civilization in modern-day Pakistan and in Ancient
Crete Crete ( el, Κρήτη, translit=, Modern: , Ancient: ) is the largest and most populous of the Greek islands, the 88th largest island in the world and the fifth largest island in the Mediterranean Sea, after Sicily, Sardinia, Cypru ...
and
Greece Greece,, or , romanized: ', officially the Hellenic Republic, is a country in Southeast Europe. It is situated on the southern tip of the Balkans, and is located at the crossroads of Europe, Asia, and Africa. Greece shares land borders with ...
. In the
Middle Ages In the history of Europe, the Middle Ages or medieval period lasted approximately from the late 5th to the late 15th centuries, similar to the post-classical period of global history. It began with the fall of the Western Roman Empire a ...
the sewer systems built by the
Romans Roman or Romans most often refers to: * Rome, the capital city of Italy * Ancient Rome, Roman civilization from 8th century BC to 5th century AD * Roman people, the people of ancient Rome *''Epistle to the Romans'', shortened to ''Romans'', a let ...
fell into disuse and waste was collected into cesspools that were periodically emptied by workers known as 'rakers' who would often sell it as
fertilizer A fertilizer (American English) or fertiliser (British English; see spelling differences) is any material of natural or synthetic origin that is applied to soil or to plant tissues to supply plant nutrients. Fertilizers may be distinct from ...
to farmers outside the city. Archaeological discoveries have shown that some of the earliest sewer systems were developed in the third millennium BCE in the ancient cities of
Harappa Harappa (; Urdu/ pnb, ) is an archaeological site in Punjab, Pakistan, about west of Sahiwal. The Bronze Age Harappan civilisation, now more often called the Indus Valley Civilisation, is named after the site, which takes its name from a mode ...
and
Mohenjo-daro Mohenjo-daro (; sd, موئن جو دڙو'', ''meaning 'Mound of the Dead Men';Pakistan Pakistan ( ur, ), officially the Islamic Republic of Pakistan ( ur, , label=none), is a country in South Asia. It is the world's fifth-most populous country, with a population of almost 243 million people, and has the world's second-lar ...
. The primitive sewers were carved in the ground alongside buildings. This discovery reveals the conceptual understanding of waste disposal by early civilizations. However, until the
Enlightenment era The Age of Enlightenment or the Enlightenment; german: Aufklärung, "Enlightenment"; it, L'Illuminismo, "Enlightenment"; pl, Oświecenie, "Enlightenment"; pt, Iluminismo, "Enlightenment"; es, La Ilustración, "Enlightenment" was an intel ...
, little progress was made in water supply and sanitation and the engineering skills of the Romans were largely neglected throughout Europe. This began to change in the 17th and 18th centuries with a rapid expansion in waterworks and pumping systems. The tremendous growth of cities in Europe and North America during the
Industrial Revolution The Industrial Revolution was the transition to new manufacturing processes in Great Britain, continental Europe, and the United States, that occurred during the period from around 1760 to about 1820–1840. This transition included going f ...
quickly led to crowding, which acted as a constant source for the outbreak of disease. As cities grew in the 19th century concerns were raised about
public health Public health is "the science and art of preventing disease, prolonging life and promoting health through the organized efforts and informed choices of society, organizations, public and private, communities and individuals". Analyzing the det ...
. As part of a trend of municipal
sanitation Sanitation refers to public health conditions related to clean drinking water and treatment and disposal of human excreta and sewage. Preventing human contact with feces is part of sanitation, as is hand washing with soap. Sanitation systems ...
programs in the late 19th and 20th centuries, many cities constructed extensive
gravity sewer A gravity sewer is a conduit utilizing the energy resulting from a difference in elevation to remove unwanted water. The term ''sewer'' implies removal of sewage or surface runoff rather than water intended for use;''Design and Construction of S ...
systems to help control outbreaks of
disease A disease is a particular abnormal condition that negatively affects the structure or function of all or part of an organism, and that is not immediately due to any external injury. Diseases are often known to be medical conditions that ar ...
such as
typhoid Typhoid fever, also known as typhoid, is a disease caused by ''Salmonella'' serotype Typhi bacteria. Symptoms vary from mild to severe, and usually begin six to 30 days after exposure. Often there is a gradual onset of a high fever over several d ...
and
cholera Cholera is an infection of the small intestine by some strains of the bacterium ''Vibrio cholerae''. Symptoms may range from none, to mild, to severe. The classic symptom is large amounts of watery diarrhea that lasts a few days. Vomiting and ...
.
Storm A storm is any disturbed state of the natural environment or the atmosphere of an astronomical body. It may be marked by significant disruptions to normal conditions such as strong wind, tornadoes, hail, thunder and lightning (a thunderstorm ...
and
sanitary sewer A sanitary sewer is an underground pipe or tunnel system for transporting sewage from houses and commercial buildings (but not stormwater) to a sewage treatment plant or disposal. Sanitary sewers are a type of gravity sewer and are part of an ...
s were necessarily developed along with the growth of cities. By the 1840s the luxury of
indoor plumbing Tap water (also known as faucet water, running water, or municipal water) is water supplied through a tap, a water dispenser valve. In many countries, tap water usually has the quality of drinking water. Tap water is commonly used for drinking, ...
, which mixes human waste with water and flushes it away, eliminated the need for
cesspool A cesspit (or cesspool or soak pit in some contexts) is a term with various meanings: it is used to describe either an underground holding tank (sealed at the bottom) or a soak pit (not sealed at the bottom). It can be used for the temporary co ...
s. Modern sewerage systems were first built in the mid-nineteenth century as a reaction to the exacerbation of sanitary conditions brought on by heavy
industrialization Industrialisation ( alternatively spelled industrialization) is the period of social and economic change that transforms a human group from an agrarian society into an industrial society. This involves an extensive re-organisation of an econom ...
and
urbanization Urbanization (or urbanisation) refers to the population shift from rural to urban areas, the corresponding decrease in the proportion of people living in rural areas, and the ways in which societies adapt to this change. It is predominantly the ...
. Baldwin Latham, a British civil engineer contributed to the rationalization of sewerage and house drainage systems and was a pioneer in sanitary engineering. He developed the concept of oval sewage pipe to facilitate sewer drainage and to prevent sludge deposition and flooding. Due to the contaminated water supply,
cholera Cholera is an infection of the small intestine by some strains of the bacterium ''Vibrio cholerae''. Symptoms may range from none, to mild, to severe. The classic symptom is large amounts of watery diarrhea that lasts a few days. Vomiting and ...
outbreaks occurred in 1832, 1849 and 1855 in
London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major s ...
, killing tens of thousands of people. This, combined with the
Great Stink The Great Stink was an event in Central London during July and August 1858 in which the hot weather exacerbated the smell of untreated human waste and industrial effluent that was present on the banks of the River Thames. The problem had been m ...
of 1858, when the smell of untreated human waste in the
River Thames The River Thames ( ), known alternatively in parts as the River Isis, is a river that flows through southern England including London. At , it is the longest river entirely in England and the second-longest in the United Kingdom, after the ...
became overpowering, and the report into sanitation reform of the Royal Commissioner
Edwin Chadwick Sir Edwin Chadwick KCB (24 January 18006 July 1890) was an English social reformer who is noted for his leadership in reforming the Poor Laws in England and instituting major reforms in urban sanitation and public health. A disciple of Util ...
, led to the
Metropolitan Commission of Sewers The Metropolitan Commission of Sewers was one of London's first steps towards bringing its sewer and drainage infrastructure under the control of a single public body. It was absorbed by the Metropolitan Board of Works on 1 January 1856. Format ...
appointing
Joseph Bazalgette Sir Joseph William Bazalgette CB (; 28 March 181915 March 1891) was a 19th-century English civil engineer. As chief engineer of London's Metropolitan Board of Works, his major achievement was the creation (in response to the Great Stink of ...
to construct a vast underground sewage system for the safe removal of waste. Contrary to Chadwick's recommendations, Bazalgette's system, and others later built in
Continental Europe Continental Europe or mainland Europe is the contiguous continent of Europe, excluding its surrounding islands. It can also be referred to ambiguously as the European continent, – which can conversely mean the whole of Europe – and, b ...
, did not pump the sewage onto farm land for use as fertilizer; it was simply piped to a natural waterway away from population centres, and pumped back into the environment.


Liverpool, London and other cities in the UK

As recently as the late 19th-century sewerage systems in some parts of the rapidly industrializing
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Nor ...
were so inadequate that
water-borne disease Waterborne diseases are conditions (meaning adverse effects on human health, such as death, disability, illness or disorders) caused by pathogenic micro-organisms that are transmitted in water. These diseases can be spread while bathing, washing, ...
s such as
cholera Cholera is an infection of the small intestine by some strains of the bacterium ''Vibrio cholerae''. Symptoms may range from none, to mild, to severe. The classic symptom is large amounts of watery diarrhea that lasts a few days. Vomiting and ...
and
typhoid Typhoid fever, also known as typhoid, is a disease caused by ''Salmonella'' serotype Typhi bacteria. Symptoms vary from mild to severe, and usually begin six to 30 days after exposure. Often there is a gradual onset of a high fever over several d ...
remained a risk. From as early as 1535 there were efforts to stop polluting the
River Thames The River Thames ( ), known alternatively in parts as the River Isis, is a river that flows through southern England including London. At , it is the longest river entirely in England and the second-longest in the United Kingdom, after the ...
in
London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major s ...
. Beginning with an Act passed that year that was to prohibit the dumping of excrement into the river. Leading up to the Industrial Revolution the River Thames was identified as being thick and black due to sewage, and it was even said that the river “smells like death.” As Britain was the first country to industrialize, it was also the first to experience the disastrous consequences of major
urbanization Urbanization (or urbanisation) refers to the population shift from rural to urban areas, the corresponding decrease in the proportion of people living in rural areas, and the ways in which societies adapt to this change. It is predominantly the ...
and was the first to construct a modern sewerage system to mitigate the resultant unsanitary conditions.Abellán, Javier (2017)
"Water supply and sanitation services in modern Europe: developments in 19th–20th centuries"
12th International Congress of the Spanish Association of Economic History: University of Salamanca, Spain.
During the early 19th century, the River Thames was effectively an open sewer, leading to frequent outbreaks of
cholera Cholera is an infection of the small intestine by some strains of the bacterium ''Vibrio cholerae''. Symptoms may range from none, to mild, to severe. The classic symptom is large amounts of watery diarrhea that lasts a few days. Vomiting and ...
epidemics. Proposals to modernize the sewerage system had been made during 1856 but were neglected due to lack of funds. However, after the ''
Great Stink The Great Stink was an event in Central London during July and August 1858 in which the hot weather exacerbated the smell of untreated human waste and industrial effluent that was present on the banks of the River Thames. The problem had been m ...
'' of 1858,
Parliament In modern politics, and history, a parliament is a legislative body of government. Generally, a modern parliament has three functions: representing the electorate, making laws, and overseeing the government via hearings and inquiries. Th ...
realized the urgency of the problem and resolved to create a modern sewerage system.


= Liverpool

= However, ten years earlier and 200 miles to the north, James Newlands, a Scottish Engineer, was one of a celebrated trio of pioneering officers appointed under a private Act, the Liverpool Sanitory Act by the Borough of Liverpool Health of Towns Committee. The other officers appointed under the Act were William Henry Duncan, Medical Officer for Health, and Thomas Fresh, Inspector of Nuisances (an early antecedent of the environmental health officer). One of five applicants for the post, Newlands was appointed Borough Engineer of Liverpool on 26 January 1847. He made a careful and exact survey of Liverpool and its surroundings, involving approximately 3,000 geodetical observations, and resulting in the construction of a contour map of the town and its neighbourhood, on a scale of one inch to 20 feet (6.1 m). From this elaborate survey Newlands proceeded to lay down a comprehensive system of outlet and contributory sewers, and main and subsidiary drains, to an aggregate extent of nearly 300 miles (480 km). The details of this projected system he presented to the Corporation in April 1848. In July 1848 James Newlands' sewer construction programme began, and over the next 11 years 86 miles (138 km) of new sewers were built. Between 1856 and 1862 another 58 miles (93 km) were added. This programme was completed in 1869. Before the sewers were built, life expectancy in Liverpool was 19 years, and by the time Newlands retired it had more than doubled.


= London

=
Joseph Bazalgette Sir Joseph William Bazalgette CB (; 28 March 181915 March 1891) was a 19th-century English civil engineer. As chief engineer of London's Metropolitan Board of Works, his major achievement was the creation (in response to the Great Stink of ...
, a
civil engineer A civil engineer is a person who practices civil engineering – the application of planning, designing, constructing, maintaining, and operating infrastructure while protecting the public and environmental health, as well as improving existing ...
and Chief Engineer of the
Metropolitan Board of Works The Metropolitan Board of Works (MBW) was the principal instrument of local government in a wide area of Middlesex, Surrey, and Kent, defined by the Metropolis Management Act 1855, from December 1855 until the establishment of the London Count ...
, was given responsibility for similar work in London. He designed an extensive underground sewerage system that diverted waste to the
Thames Estuary The Thames Estuary is where the River Thames meets the waters of the North Sea, in the south-east of Great Britain. Limits An estuary can be defined according to different criteria (e.g. tidal, geographical, navigational or in terms of salini ...
, downstream of the main center of population. Six main interceptor sewers, totaling almost 100 miles (160 km) in length, were constructed, some incorporating stretches of London's 'lost' rivers. Three of these sewers were north of the river, the southernmost, low-level one being incorporated in the
Thames Embankment The Thames Embankment is a work of 19th-century civil engineering that reclaimed marshy land next to the River Thames in central London. It consists of the Victoria Embankment and Chelsea Embankment. History There had been a long history of ...
. The Embankment also allowed new roads, new public gardens, and the Circle Line of the
London Underground The London Underground (also known simply as the Underground or by its nickname the Tube) is a rapid transit system serving Greater London and some parts of the adjacent counties of Buckinghamshire, Essex and Hertfordshire in England. The Un ...
. The intercepting sewers, constructed between 1859 and 1865, were fed by 450 miles (720 km) of main sewers that, in turn, conveyed the contents of some 13,000 miles (21,000 km) of smaller local sewers. Construction of the interceptor system required 318 million bricks, 2.7 million cubic metres of excavated earth and 670,000 cubic metres of concrete.
Gravity In physics, gravity () is a fundamental interaction which causes mutual attraction between all things with mass or energy. Gravity is, by far, the weakest of the four fundamental interactions, approximately 1038 times weaker than the strong ...
allowed the sewage to flow eastwards, but in places such as
Chelsea Chelsea or Chelsey may refer to: Places Australia * Chelsea, Victoria Canada * Chelsea, Nova Scotia * Chelsea, Quebec United Kingdom * Chelsea, London, an area of London, bounded to the south by the River Thames ** Chelsea (UK Parliament const ...
,
Deptford Deptford is an area on the south bank of the River Thames in southeast London, within the London Borough of Lewisham. It is named after a ford of the River Ravensbourne. From the mid 16th century to the late 19th it was home to Deptford D ...
and Abbey Mills, pumping stations were built to raise the water and provide sufficient flow. Sewers north of the Thames feed into the
Northern Outfall Sewer The Northern Outfall Sewer (NOS) is a major gravity sewer which runs from Wick Lane in Hackney to Beckton sewage treatment works in east London; most of it was designed by Joseph Bazalgette after an outbreak of cholera in 1853 and the " Great ...
, which fed into a major treatment works at
Beckton Beckton is a suburb in east London, England, located east of Charing Cross and part of the London Borough of Newham. Adjacent to the River Thames, the area consisted of unpopulated marshland known as the East Ham Levels in the parishes of Barki ...
. South of the river, the
Southern Outfall Sewer The Southern Outfall Sewer is a major sewer taking sewage from the southern area of central London to Crossness in south-east London. Flows from three interceptory sewers combine at a pumping station in Deptford and then run under Greenwich, ...
extended to a similar facility at
Crossness Crossness is a location in the London Borough of Bexley, close to the southern bank of the River Thames, to the east of Thamesmead, west of Belvedere and north-west of Erith. The place takes its name from Cross Ness, a specific promontory on t ...
. With only minor modifications, Bazalgette's engineering achievement remains the basis for sewerage design up into the present day.


= other cities in the UK

= In
Merthyr Tydfil Merthyr Tydfil (; cy, Merthyr Tudful ) is the main town in Merthyr Tydfil County Borough, Wales, administered by Merthyr Tydfil County Borough Council. It is about north of Cardiff. Often called just Merthyr, it is said to be named after Tyd ...
, a large town in
South Wales South Wales ( cy, De Cymru) is a loosely defined region of Wales bordered by England to the east and mid Wales to the north. Generally considered to include the historic counties of Glamorgan and Monmouthshire, south Wales extends westwards t ...
, most houses discharged their sewage to individual cess-pits which persistently overflowed causing the pavements to be awash with foul sewage.


Paris, France

In 1802,
Napoleon Napoleon Bonaparte ; it, Napoleone Bonaparte, ; co, Napulione Buonaparte. (born Napoleone Buonaparte; 15 August 1769 – 5 May 1821), later known by his regnal name Napoleon I, was a French military commander and political leader who ...
built the
Ourcq canal The Canal de l'Ourcq is a long canal in the Île-de-France region (greater Paris) with 10 locks. It was built at a width of but was enlarged to 3.7 m (12 ft), which permitted use by more pleasure boats. The canal begins at Port-au ...
which brought 70,000 cubic meters of water a day to Paris, while the
Seine ) , mouth_location = Le Havre/Honfleur , mouth_coordinates = , mouth_elevation = , progression = , river_system = Seine basin , basin_size = , tributaries_left = Yonne, Loing, Eure, Risle , tributaries ...
river received up to of wastewater per day. The Paris cholera epidemic of 1832 sharpened the public awareness of the necessity for some sort of drainage system to deal with sewage and wastewater in a better and healthier way. Between 1865 and 1920 Eugene Belgrand lead the development of a large scale system for water supply and wastewater management. Between these years approximately 600 kilometers of aqueducts were built to bring in potable spring water, which freed the poor quality water to be used for flushing streets and sewers. By 1894 laws were passed which made drainage mandatory. The treatment of Paris sewage, though, was left to natural devices as 5,000 hectares of land were used to spread the waste out to be naturally purified. Further, the lack of sewage treatment left Parisian sewage pollution to become concentrated downstream in the town of Clichy, effectively forcing residents to pack up and move elsewhere. The 19th century brick-vaulted
Paris sewers The sewers of the French capital Paris date back to the year 1370 when the first underground system was constructed under Rue Montmartre. Consecutive French governments enlarged the system to cover the city's population, including expansions und ...
serve as a tourist attraction nowadays.


Hamburg and Frankfurt, Germany

The first comprehensive sewer system in a German city was built in
Hamburg, Germany (male), (female) en, Hamburger(s), Hamburgian(s) , timezone1 = Central (CET) , utc_offset1 = +1 , timezone1_DST = Central (CEST) , utc_offset1_DST = +2 , postal ...
, in the mid-19th century. Vol. I: Design of Sewers. In 1863, work began on the construction of a modern sewerage system for the rapidly growing city of
Frankfurt am Main Frankfurt, officially Frankfurt am Main (; Hessian: , " Frank ford on the Main"), is the most populous city in the German state of Hesse. Its 791,000 inhabitants as of 2022 make it the fifth-most populous city in Germany. Located on its na ...
, based on design work by
William Lindley William Lindley (7 September 1808 in London – 22 May 1900 in Blackheath, London), was an English engineer who together with his sons designed water and sewerage systems for over 30 cities across Europe. Life As a young engineer he worked to ...
. 20 years after the system's completion, the
death rate Mortality rate, or death rate, is a measure of the number of deaths (in general, or due to a specific cause) in a particular population, scaled to the size of that population, per unit of time. Mortality rate is typically expressed in units of de ...
from
typhoid Typhoid fever, also known as typhoid, is a disease caused by ''Salmonella'' serotype Typhi bacteria. Symptoms vary from mild to severe, and usually begin six to 30 days after exposure. Often there is a gradual onset of a high fever over several d ...
had fallen from 80 to 10 per 100,000 inhabitants.


United States

The first sewer systems in the United States were built in the late 1850s in Chicago and Brooklyn. In the United States, the first sewage treatment plant using
chemical precipitation In an aqueous solution, precipitation is the process of transforming a dissolved substance into an insoluble solid from a super-saturated solution. The solid formed is called the precipitate. In case of an inorganic chemical reaction leading ...
was built in Worcester, Massachusetts, in 1890.


Sewage treatment

Initially the gravity sewer systems discharged sewage directly to
surface water Surface water is water located on top of land forming terrestrial (inland) waterbodies, and may also be referred to as ''blue water'', opposed to the seawater and waterbodies like the ocean. The vast majority of surface water is produced by pr ...
s without treatment. Later, cities attempted to treat the sewage before discharge in order to prevent
water pollution Water pollution (or aquatic pollution) is the contamination of water bodies, usually as a result of human activities, so that it negatively affects its uses. Water bodies include lakes, rivers, oceans, aquifers, reservoirs and groundwater. Wate ...
and
waterborne diseases Waterborne diseases are conditions (meaning adverse effects on human health, such as death, disability, illness or disorders) caused by pathogenic micro-organisms that are transmitted in water. These diseases can be spread while bathing, washing ...
. During the half-century around 1900, these
public health Public health is "the science and art of preventing disease, prolonging life and promoting health through the organized efforts and informed choices of society, organizations, public and private, communities and individuals". Analyzing the det ...
interventions succeeded in drastically reducing the incidence of water-borne diseases among the urban population, and were an important cause in the increases of
life expectancy Life expectancy is a statistical measure of the average time an organism is expected to live, based on the year of its birth, current age, and other demographic factors like sex. The most commonly used measure is life expectancy at birth ...
experienced at the time.


Application on agricultural land

Early techniques for
sewage treatment Sewage treatment (or domestic wastewater treatment, municipal wastewater treatment) is a type of wastewater treatment which aims to remove contaminants from sewage to produce an effluent that is suitable for discharge to the surrounding envi ...
involved land application of sewage on agricultural land. One of the first attempts at diverting sewage for use as a fertilizer in the farm was made by the
cotton mill A cotton mill is a building that houses spinning or weaving machinery for the production of yarn or cloth from cotton, an important product during the Industrial Revolution in the development of the factory system. Although some were driven ...
owner James Smith in the 1840s. He experimented with a piped distribution system initially proposed by James Vetch that collected sewage from his factory and pumped it into the outlying farms, and his success was enthusiastically followed by Edwin Chadwick and supported by organic chemist
Justus von Liebig Justus Freiherr von Liebig (12 May 1803 – 20 April 1873) was a German scientist who made major contributions to agricultural and biological chemistry, and is considered one of the principal founders of organic chemistry. As a professor at the ...
. The idea was officially adopted by the Health of Towns Commission, and various schemes (known as
sewage farm Sewage farms use sewage for irrigation and fertilizing agricultural land. The practice is common in warm, arid climates where irrigation is valuable while sources of fresh water are scarce. Suspended solids may be converted to humus by microbes a ...
s) were trialled by different municipalities over the next 50 years. At first, the heavier solids were channeled into ditches on the side of the farm and were covered over when full, but soon flat-bottomed tanks were employed as reservoirs for the sewage; the earliest patent was taken out by William Higgs in 1846 for "tanks or reservoirs in which the contents of sewers and drains from cities, towns and villages are to be collected and the solid animal or vegetable matters therein contained, solidified and dried..." Improvements to the design of the tanks included the introduction of the horizontal-flow tank in the 1850s and the radial-flow tank in 1905. These tanks had to be manually de-sludged periodically, until the introduction of automatic mechanical de-sludgers in the early 1900s.


Chemical treatment and sedimentation

As
pollution Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of any substance (solid, liquid, or gas) or energy (such as radioactivity, heat, sound, or light). Pollutants, the ...
of water bodies became a concern, cities attempted to treat the sewage before discharge. In the late 19th century some cities began to add chemical treatment and
sedimentation Sedimentation is the deposition of sediments. It takes place when particles in suspension settle out of the fluid in which they are entrained and come to rest against a barrier. This is due to their motion through the fluid in response to the ...
systems to their sewers. In the United States, the first sewage treatment plant using
chemical precipitation In an aqueous solution, precipitation is the process of transforming a dissolved substance into an insoluble solid from a super-saturated solution. The solid formed is called the precipitate. In case of an inorganic chemical reaction leading ...
was built in Worcester, Massachusetts in 1890. During the half-century around 1900, these
public health Public health is "the science and art of preventing disease, prolonging life and promoting health through the organized efforts and informed choices of society, organizations, public and private, communities and individuals". Analyzing the det ...
interventions succeeded in drastically reducing the incidence of water-borne diseases among the urban population, and were an important cause in the increases of
life expectancy Life expectancy is a statistical measure of the average time an organism is expected to live, based on the year of its birth, current age, and other demographic factors like sex. The most commonly used measure is life expectancy at birth ...
experienced at the time. Odor was considered the big problem in waste disposal and to address it, sewage could be drained to a
lagoon A lagoon is a shallow body of water separated from a larger body of water by a narrow landform, such as reefs, barrier islands, barrier peninsulas, or isthmuses. Lagoons are commonly divided into ''coastal lagoons'' (or ''barrier lagoons'' ...
, or "settled" and the solids removed, to be disposed of separately. This process is now called "primary treatment" and the settled solids are called "sludge." At the end of the 19th century, since primary treatment still left odor problems, it was discovered that bad odors could be prevented by introducing oxygen into the decomposing sewage. This was the beginning of the biological aerobic and anaerobic treatments which are fundamental to wastewater processes. The precursor to the modern
septic tank A septic tank is an underground chamber made of concrete, fiberglass, or plastic through which domestic wastewater ( sewage) flows for basic sewage treatment. Settling and anaerobic digestion processes reduce solids and organics, but the treatm ...
was the
cesspool A cesspit (or cesspool or soak pit in some contexts) is a term with various meanings: it is used to describe either an underground holding tank (sealed at the bottom) or a soak pit (not sealed at the bottom). It can be used for the temporary co ...
in which the water was sealed off to prevent contamination and the solid waste was slowly liquified due to anaerobic action; it was invented by L.H Mouras in France in the 1860s. Donald Cameron, as City Surveyor for
Exeter Exeter () is a city in Devon, South West England. It is situated on the River Exe, approximately northeast of Plymouth and southwest of Bristol. In Roman Britain, Exeter was established as the base of Legio II Augusta under the personal c ...
patented an improved version in 1895, which he called a 'septic tank'; septic having the meaning of 'bacterial'. These are still in worldwide use, especially in rural areas unconnected to large-scale sewage systems.


Biological treatment

It was not until the late 19th century that it became possible to treat the sewage by biologically decomposing the organic components through the use of
microorganism A microorganism, or microbe,, ''mikros'', "small") and ''organism'' from the el, ὀργανισμός, ''organismós'', "organism"). It is usually written as a single word but is sometimes hyphenated (''micro-organism''), especially in olde ...
s and removing the pollutants. Land treatment was also steadily becoming less feasible, as cities grew and the volume of sewage produced could no longer be absorbed by the farmland on the outskirts.
Edward Frankland Sir Edward Frankland, (18 January 18259 August 1899) was an English chemist. He was one of the originators of organometallic chemistry and introduced the concept of combining power or valence. An expert in water quality and analysis, he was a ...
conducted experiments at the sewage farm in
Croydon Croydon is a large town in south London, England, south of Charing Cross. Part of the London Borough of Croydon, a local government district of Greater London. It is one of the largest commercial districts in Greater London, with an extensive ...
, England, during the 1870s and was able to demonstrate that filtration of sewage through porous gravel produced a nitrified effluent (the ammonia was converted into nitrate) and that the filter remained unclogged over long periods of time. This established the then revolutionary possibility of biological treatment of sewage using a contact bed to oxidize the waste. This concept was taken up by the chief chemist for the London
Metropolitan Board of Works The Metropolitan Board of Works (MBW) was the principal instrument of local government in a wide area of Middlesex, Surrey, and Kent, defined by the Metropolis Management Act 1855, from December 1855 until the establishment of the London Count ...
, William Libdin, in 1887: :...in all probability the true way of purifying sewage...will be first to separate the sludge, and then turn into neutral effluent... retain it for a sufficient period, during which time it should be fully aerated, and finally discharge it into the stream in a purified condition. This is indeed what is aimed at and imperfectly accomplished on a sewage farm. From 1885 to 1891 filters working on this principle were constructed throughout the UK and the idea was also taken up in the US at the
Lawrence Experiment Station The Lawrence Experiment Station, now known as the Senator William X. Wall Experiment Station, was the world's first trial station for drinking water purification and sewage treatment. It was established in 1887 in Lawrence, Massachusetts. A new, ...
in
Massachusetts Massachusetts (Massachusett language, Massachusett: ''Muhsachuweesut assachusett writing systems, məhswatʃəwiːsət'' English: , ), officially the Commonwealth of Massachusetts, is the most populous U.S. state, state in the New England ...
, where Frankland's work was confirmed. In 1890 the LES developed a '
trickling filter A trickling filter is a type of wastewater treatment system. It consists of a fixed bed of rocks, coke, gravel, slag, polyurethane foam, sphagnum peat moss, ceramic, or plastic media over which sewage or other wastewater flows downward an ...
' that gave a much more reliable performance. Contact beds were developed in
Salford Salford () is a city and the largest settlement in the City of Salford metropolitan borough in Greater Manchester, England. In 2011, Salford had a population of 103,886. It is also the second and only other city in the metropolitan county afte ...
,
Lancashire Lancashire ( , ; abbreviated Lancs) is the name of a historic county, ceremonial county, and non-metropolitan county in North West England. The boundaries of these three areas differ significantly. The non-metropolitan county of Lancashi ...
and by scientists working for the
London City Council London City Council is the governing body of the city of London, Ontario, Canada. Composition London is divided into 14 wards, with residents in each ward electing one councillor. The mayor is elected citywide, who along with the councillors for ...
in the early 1890s. According to Christopher Hamlin, this was part of a conceptual revolution that replaced the philosophy that saw "sewage purification as the prevention of decomposition with one that tried to facilitate the biological process that destroy sewage naturally." Contact beds were tanks containing an inert substance, such as stones or slate, that maximized the surface area available for the microbial growth to break down the sewage. The sewage was held in the tank until it was fully decomposed and it was then filtered out into the ground. This method quickly became widespread, especially in the UK, where it was used in
Leicester Leicester ( ) is a city, unitary authority and the county town of Leicestershire in the East Midlands of England. It is the largest settlement in the East Midlands. The city lies on the River Soar and close to the eastern end of the National ...
,
Sheffield Sheffield is a city in South Yorkshire, England, whose name derives from the River Sheaf which runs through it. The city serves as the administrative centre of the City of Sheffield. It is historically part of the West Riding of Yorkshire and ...
,
Manchester Manchester () is a city in Greater Manchester, England. It had a population of 552,000 in 2021. It is bordered by the Cheshire Plain to the south, the Pennines to the north and east, and the neighbouring city of Salford to the west. The tw ...
and
Leeds Leeds () is a city and the administrative centre of the City of Leeds district in West Yorkshire, England. It is built around the River Aire and is in the eastern foothills of the Pennines. It is also the third-largest settlement (by populati ...
. The bacterial bed was simultaneously developed by Joseph Corbett as Borough Engineer in
Salford Salford () is a city and the largest settlement in the City of Salford metropolitan borough in Greater Manchester, England. In 2011, Salford had a population of 103,886. It is also the second and only other city in the metropolitan county afte ...
and experiments in 1905 showed that his method was superior in that greater volumes of sewage could be purified better for longer periods of time than could be achieved by the contact bed. The Royal Commission on Sewage Disposal published its eighth report in 1912 that set what became the international standard for sewage discharge into rivers; the '20:30 standard', which allowed "''2 parts per hundred thousand"'' of
Biochemical oxygen demand Biochemical oxygen demand (BOD) is the amount of dissolved oxygen (DO) needed (i.e. demanded) by aerobic biological organisms to break down organic material present in a given water sample at a certain temperature over a specific time period. T ...
and ''"3 parts per hundred thousand"'' of suspended solid.


=Activated sludge process

= Most cities in the Western world added more effective systems for sewage treatment in the early 20th century, after scientists at the
University of Manchester , mottoeng = Knowledge, Wisdom, Humanity , established = 2004 – University of Manchester Predecessor institutions: 1956 – UMIST (as university college; university 1994) 1904 – Victoria University of Manchester 1880 – Victoria Univer ...
discovered the sewage treatment process of
activated sludge The activated sludge process is a type of biological wastewater treatment process for treating sewage or industrial wastewaters using aeration and a biological floc composed of bacteria and protozoa. It uses air (or oxygen) and microorganisms to ...
in 1912.


Toilets

With the onset of the
Industrial Revolution The Industrial Revolution was the transition to new manufacturing processes in Great Britain, continental Europe, and the United States, that occurred during the period from around 1760 to about 1820–1840. This transition included going f ...
and related advances in technology, the
flush toilet A flush toilet (also known as a flushing toilet, water closet (WC) – see also toilet names) is a toilet that disposes of human waste (principally urine and feces) by using the force of water to ''flush'' it through a drainpipe to another loca ...
began to emerge into its modern form in the late 18th century, (''See'' Development of the modern flush toilet.) In urban areas, toilets are typically connected to a municipal
sanitary sewer A sanitary sewer is an underground pipe or tunnel system for transporting sewage from houses and commercial buildings (but not stormwater) to a sewage treatment plant or disposal. Sanitary sewers are a type of gravity sewer and are part of an ...
system, while in more rural areas they are usually connected to an
onsite sewage facility Onsite sewage facilities (OSSF), also called septic systems, are wastewater systems designed to treat and dispose of effluent on the same property that produces the wastewater, in areas not served by public sewage infrastructure. A septic tank a ...
(septic system). Where this is not feasible or desired,
dry toilet A dry toilet (or non-flush toilet, no flush toilet or toilet without a flush) is a toilet which, unlike a flush toilet, does not use flush water. Dry toilets do not use water to move excreta along or block odors. They do not produce sewage, and a ...
s are an alternative option.


Water supply

An ambitious engineering project to bring fresh water from
Hertfordshire Hertfordshire ( or ; often abbreviated Herts) is one of the home counties in southern England. It borders Bedfordshire and Cambridgeshire to the north, Essex to the east, Greater London to the south, and Buckinghamshire to the west. For gover ...
to
London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major s ...
was undertaken by
Hugh Myddleton Sir Hugh Myddelton (or Middleton), 1st Baronet (1560 – 10 December 1631) was a Welsh clothmaker, entrepreneur, mine-owner, goldsmith, banker and self-taught engineer. The spelling of his name is inconsistently reproduced, but Myddelton appear ...
, who oversaw the construction of the New River between 1609 and 1613. The
New River Company The New River Company, formally The Governor and Company of the New River brought from Chadwell and Amwell to London, was a privately-owned water supply company in London, England, originally formed around 1609 and incorporated in 1619 by roy ...
became one of the largest private water companies of the time, supplying the City of London and other central areas. The first civic system of piped water in England was established in
Derby Derby ( ) is a city and unitary authority area in Derbyshire, England. It lies on the banks of the River Derwent in the south of Derbyshire, which is in the East Midlands Region. It was traditionally the county town of Derbyshire. Derby g ...
in 1692, using wooden pipes, which was common for several centuries. The Derby Waterworks included waterwheel-powered pumps for raising water out of the River Derwent and storage tanks for distribution. It was in the 18th century that a rapidly growing population fueled a boom in the establishment of private water supply networks in
London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major s ...
. The
Chelsea Waterworks Company The Chelsea Waterworks Company was a London waterworks company founded in 1723 which supplied water to many central London locations throughout the 18th and 19th centuries until its functions were taken over by the Metropolitan Water Board in ...
was established in 1723 "for the better supplying the City and
Liberties Liberty is the ability to do as one pleases, or a right or immunity enjoyed by prescription or by grant (i.e. privilege). It is a synonym for the word freedom. In modern politics, liberty is understood as the state of being free within society f ...
of
Westminster Westminster is an area of Central London, part of the wider City of Westminster. The area, which extends from the River Thames to Oxford Street, has many visitor attractions and historic landmarks, including the Palace of Westminster, Bucki ...
and parts adjacent with water".''The London Encyclopaedia'', Ben Weinreb & Christopher Hibbert, Macmillan, 1995, The company created extensive ponds in the area bordering
Chelsea Chelsea or Chelsey may refer to: Places Australia * Chelsea, Victoria Canada * Chelsea, Nova Scotia * Chelsea, Quebec United Kingdom * Chelsea, London, an area of London, bounded to the south by the River Thames ** Chelsea (UK Parliament const ...
and
Pimlico Pimlico () is an area of Central London in the City of Westminster, built as a southern extension to neighbouring Belgravia. It is known for its garden squares and distinctive Regency architecture. Pimlico is demarcated to the north by Victori ...
using water from the tidal Thames. Other waterworks were established in London, including at
West Ham West Ham is an area in East London, located east of Charing Cross in the west of the modern London Borough of Newham. The area, which lies immediately to the north of the River Thames and east of the River Lea, was originally an ancient p ...
in 1743, at
Lea Bridge Lea Bridge is a district in the London Borough of Hackney and the London Borough of Waltham Forest in London, England. It lies 7 miles (11.3 km) northeast of Charing Cross. The area it takes its name from a bridge built over the River Le ...
before 1767,
Lambeth Waterworks Company The Lambeth Waterworks Company was a utility company supplying water to parts of south London in England. The company was established in 1785 with works in north Lambeth and became part of the publicly owned Metropolitan Water Board in 1904. ...
in 1785, West Middlesex Waterworks Company in 1806 and
Grand Junction Waterworks Company The Grand Junction Waterworks Company was a utility company supplying water to parts of west London in England. The company was formed as an offshoot of the Grand Junction Canal Company in 1811 and became part of the publicly owned Metropoli ...
in 1811. The S-bend
pipe Pipe(s), PIPE(S) or piping may refer to: Objects * Pipe (fluid conveyance), a hollow cylinder following certain dimension rules ** Piping, the use of pipes in industry * Smoking pipe ** Tobacco pipe * Half-pipe and quarter pipe, semi-circular ...
was invented by
Alexander Cummings Alexander Cumming FRSE (sometimes referred to as Alexander Cummings; 1733 – 8 March 1814) was a Scottish watchmaker and instrument inventor, who was the first to patent a design of the flush toilet in 1775, which had been pioneered by Sir Jo ...
in 1775 but became known as the U-bend following the introduction of the U-shaped trap by
Thomas Crapper Thomas Crapper (baptised 28 September 1836; died 27 January 1910) was an English plumber and businessman. He founded Thomas Crapper & Co in London, a plumbing equipment company. His notability with regard to toilets has often been overstated, mo ...
in 1880. The first screw-down
water tap A tap (also spigot or faucet: see usage variations) is a valve controlling the release of a liquid or gas. Nomenclature United Kingdom * Tap is used in the United Kingdom and most of the Commonwealth for any everyday type of valve, partic ...
was patented in 1845 by Guest and Chrimes, a brass foundry in
Rotherham Rotherham () is a large minster and market town in South Yorkshire, England. The town takes its name from the River Rother which then merges with the River Don. The River Don then flows through the town centre. It is the main settlement of ...
.


Water treatment


Sand filter

Sir
Francis Bacon Francis Bacon, 1st Viscount St Alban (; 22 January 1561 – 9 April 1626), also known as Lord Verulam, was an English philosopher and statesman who served as Attorney General and Lord Chancellor of England. Bacon led the advancement of both ...
attempted to desalinate sea water by passing the flow through a
sand filter Sand filters are used as a step in the water treatment process of water purification. There are three main types; rapid (gravity) sand filters, upward flow sand filters and slow sand filters. All three methods are used extensively in the water i ...
. Although his experiment did not succeed, it marked the beginning of a new interest in the field. The first documented use of
sand filter Sand filters are used as a step in the water treatment process of water purification. There are three main types; rapid (gravity) sand filters, upward flow sand filters and slow sand filters. All three methods are used extensively in the water i ...
s to purify the water supply dates to 1804, when the owner of a bleachery in
Paisley, Scotland Paisley ( ; sco, Paisley, gd, Pàislig ) is a large town situated in the west central Lowlands of Scotland. Located north of the Gleniffer Braes, the town borders the city of Glasgow to the east, and straddles the banks of the White Cart Water ...
, John Gibb, installed an experimental filter, selling his unwanted surplus to the public. This method was refined in the following two decades by engineers working for private water companies, and it culminated in the first treated public water supply in the world, installed by engineer James Simpson for the
Chelsea Waterworks Company The Chelsea Waterworks Company was a London waterworks company founded in 1723 which supplied water to many central London locations throughout the 18th and 19th centuries until its functions were taken over by the Metropolitan Water Board in ...
in London in 1829. This installation provided filtered water for every resident of the area, and the network design was widely copied throughout the
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Nor ...
in the ensuing decades. The Metropolis Water Act introduced the regulation of the
water supply Water supply is the provision of water by public utilities, commercial organisations, community endeavors or by individuals, usually via a system of pumps and pipes. Public water supply systems are crucial to properly functioning societies. Thes ...
companies in
London London is the capital and largest city of England and the United Kingdom, with a population of just under 9 million. It stands on the River Thames in south-east England at the head of a estuary down to the North Sea, and has been a major s ...
, including minimum standards of water quality for the first time. The Act "made provision for securing the supply to the Metropolis of pure and wholesome water", and required that all water be "effectually filtered" from 31 December 1855. This was followed up with legislation for the mandatory inspection of water quality, including comprehensive chemical analyses, in 1858. This legislation set a worldwide precedent for similar state public health interventions across Europe. The
Metropolitan Commission of Sewers The Metropolitan Commission of Sewers was one of London's first steps towards bringing its sewer and drainage infrastructure under the control of a single public body. It was absorbed by the Metropolitan Board of Works on 1 January 1856. Format ...
was formed at the same time, water filtration was adopted throughout the country, and new water intakes on the
Thames The River Thames ( ), known alternatively in parts as the River Isis, is a river that flows through southern England including London. At , it is the longest river entirely in England and the second-longest in the United Kingdom, after the ...
were established above
Teddington Lock Teddington Lock is a complex of three locks and a weir on the River Thames between Ham and Teddington in the London Borough of Richmond upon Thames, England. Historically in Middlesex, it was first built in 1810. The limit of legal powe ...
. Automatic pressure filters, where the water is forced under pressure through the filtration system, were innovated in 1899 in England.


Water chlorination

In what may have been one of the first attempts to use chlorine, William Soper used chlorinated lime to treat the sewage produced by
typhoid Typhoid fever, also known as typhoid, is a disease caused by ''Salmonella'' serotype Typhi bacteria. Symptoms vary from mild to severe, and usually begin six to 30 days after exposure. Often there is a gradual onset of a high fever over several d ...
patients in 1879. In a paper published in 1894,
Moritz Traube Moritz Traube (12 February 1826 in Ratibor, Province of Silesia, Prussia (now Racibórz, Poland) – 28 June 1894 in Berlin, German Empire) was a German chemist (physiological chemistry) and universal private scholar. Traube worked on chemical ...
formally proposed the addition of chloride of lime (
calcium hypochlorite Calcium hypochlorite is an inorganic compound with formula Ca(OCl)2. It is the main active ingredient of commercial products called bleaching powder, chlorine powder, or chlorinated lime, used for water treatment and as a bleaching agent. This ...
) to water to render it "germ-free." Two other investigators confirmed Traube's findings and published their papers in 1895. Early attempts at implementing water chlorination at a water treatment plant were made in 1893 in
Hamburg (male), (female) en, Hamburger(s), Hamburgian(s) , timezone1 = Central (CET) , utc_offset1 = +1 , timezone1_DST = Central (CEST) , utc_offset1_DST = +2 , postal ...
, Germany, and in 1897 the town of
Maidstone Maidstone is the largest town in Kent, England, of which it is the county town. Maidstone is historically important and lies 32 miles (51 km) east-south-east of London. The River Medway runs through the centre of the town, linking it with ...
, in
Kent Kent is a county in South East England and one of the home counties. It borders Greater London to the north-west, Surrey to the west and East Sussex to the south-west, and Essex to the north across the estuary of the River Thames; it faces the ...
, England, was the first to have its entire water supply treated with chlorine. Permanent water chlorination began in 1905, when a faulty
slow sand filter Slow sand filters are used in water purification for treating raw water to produce a potable product. They are typically deep, can be rectangular or cylindrical in cross section and are used primarily to treat surface water. The length and brea ...
and a contaminated water supply led to a serious typhoid fever epidemic in Lincoln, England. Dr. Alexander Cruickshank Houston used chlorination of the water to stem the epidemic. His installation fed a concentrated solution of chloride of lime to the water being treated. The chlorination of the water supply helped stop the epidemic and as a precaution, the chlorination was continued until 1911 when a new water supply was instituted. The first continuous use of chlorine in the
United States The United States of America (U.S.A. or USA), commonly known as the United States (U.S. or US) or America, is a country primarily located in North America. It consists of 50 states, a federal district, five major unincorporated territo ...
for disinfection took place in 1908 at Boonton Reservoir (on the
Rockaway River The Rockaway River is a tributary of the Passaic River, approximately 35 mi (56 km) long, in northern New Jersey in the United States. The upper course of the river flows through a wooded mountainous valley, whereas the lower course flo ...
), which served as the supply for
Jersey City, New Jersey Jersey City is the second-most populous city in the U.S. state of New Jersey, after Newark.calcium hypochlorite Calcium hypochlorite is an inorganic compound with formula Ca(OCl)2. It is the main active ingredient of commercial products called bleaching powder, chlorine powder, or chlorinated lime, used for water treatment and as a bleaching agent. This ...
) at doses of 0.2 to 0.35 ppm. The treatment process was conceived by Dr. John L. Leal and the chlorination plant was designed by George Warren Fuller. Over the next few years, chlorine disinfection using chloride of lime were rapidly installed in drinking water systems around the world. The technique of purification of drinking water by use of compressed liquefied chlorine gas was developed by a British officer in the
Indian Medical Service The Indian Medical Service (IMS) was a military medical service in British India, which also had some civilian functions. It served during the two World Wars, and remained in existence until the independence of India in 1947. Many of its officer ...
, Vincent B. Nesfield, in 1903. According to his own account, "It occurred to me that chlorine gas might be found satisfactory ... if suitable means could be found for using it.... The next important question was how to render the gas portable. This might be accomplished in two ways: By liquefying it, and storing it in lead-lined iron vessels, having a jet with a very fine capillary canal, and fitted with a tap or a screw cap. The tap is turned on, and the cylinder placed in the amount of water required. The chlorine bubbles out, and in ten to fifteen minutes the water is absolutely safe. This method would be of use on a large scale, as for service water carts."
U.S. Army The United States Army (USA) is the land service branch of the United States Armed Forces. It is one of the eight U.S. uniformed services, and is designated as the Army of the United States in the U.S. Constitution.Article II, section 2, ...
Major Major (commandant in certain jurisdictions) is a military rank of commissioned officer status, with corresponding ranks existing in many military forces throughout the world. When used unhyphenated and in conjunction with no other indicators ...
Carl Rogers Darnall Brigadier General Carl Rogers Darnall (December 25, 1867 in Weston, Texas – January 18, 1941 in Washington, D.C.) was a United States Army chemist and surgeon credited with originating the technique of liquid chlorination of drinking wate ...
, Professor of Chemistry at the
Army Medical School Founded by U.S. Army Brigadier General George Miller Sternberg, MD in 1893, the Army Medical School (AMS) was by some reckonings the world's first school of public health and preventive medicine. (The other institution vying for this distinctio ...
, gave the first practical demonstration of this in 1910. Shortly thereafter, Major William J. L. Lyster of the Army Medical Department used a solution of
calcium hypochlorite Calcium hypochlorite is an inorganic compound with formula Ca(OCl)2. It is the main active ingredient of commercial products called bleaching powder, chlorine powder, or chlorinated lime, used for water treatment and as a bleaching agent. This ...
in a linen bag to treat water. For many decades, Lyster's method remained the standard for U.S. ground forces in the field and in camps, implemented in the form of the familiar Lyster Bag (also spelled Lister Bag). This work became the basis for present day systems of municipal water purification.


Fluoridation

Water fluoridation Water fluoridation is the controlled adjustment of fluoride to a public water supply solely to reduce tooth decay. Fluoridated water contains fluoride at a level that is effective for preventing cavities; this can occur naturally or by adding ...
is a practice adding fluoride to drinking water for the purpose of decreasing
tooth decay Tooth decay, also known as cavities or caries, is the breakdown of teeth due to acids produced by bacteria. The cavities may be a number of different colors from yellow to black. Symptoms may include pain and difficulty with eating. Complicati ...
. The architect of these first fluoride studies was Dr. H. Trendley Dean, head of the Dental Hygiene Unit at the National Institute of Health (NIH). Dean began investigating the epidemiology of fluorosis in 1931. By the late 1930s, he and his staff had made a critical discovery. Namely, fluoride levels of up to 1.0 ppm in drinking water did not cause enamel fluorosis in most people and only mild enamel fluorosis in a small percentage of people. Proof That Fluoride Prevents Caries This finding sent Dean's thoughts spiraling in a new direction. He recalled from reading McKay's and Black's studies on fluorosis that mottled tooth enamel is unusually resistant to decay. Dean wondered whether adding fluoride to drinking water at physically and cosmetically safe levels would help fight tooth decay. This hypothesis, Dean told his colleagues, would need to be tested. In 1944, Dean got his wish. That year, the City Commission of Grand Rapids, Michigan-after numerous discussions with researchers from the PHS, the Michigan Department of Health, and other public health organizations-voted to add fluoride to its public water supply the following year. In 1945, Grand Rapids became the first city in the world to fluoridate its drinking water. The Grand Rapids water fluoridation study was originally sponsored by the U.S. Surgeon General, but was taken over by the NIDR shortly after the institute's inception in 1948.


Trends

The
Sustainable Development Goal 6 Sustainable Development Goal 6 (SDG 6 or Global Goal 6) is about "clean water and sanitation for all". It is one of 17 Sustainable Development Goals established by the United Nations General Assembly in 2015, the official wording is: "Ensure ava ...
formulated in 2015 includes targets on access to water supply and sanitation at a global level. In
developing countries A developing country is a sovereign state with a lesser developed industrial base and a lower Human Development Index (HDI) relative to other countries. However, this definition is not universally agreed upon. There is also no clear agree ...
,
self-supply of water and sanitation Self-supply of water and sanitation (also called household-led water supply or individual supply) refers to an approach of incremental improvements to water and sanitation services, which are mainly financed by the user. People around the world ...
is used as an approach of incremental improvements to water and sanitation services, which are mainly financed by the user.
Decentralized wastewater system Decentralized wastewater systems (also referred to as decentralized wastewater treatment systems) convey, treat and dispose or reuse wastewater from small and low-density communities, buildings and dwellings in remote areas, individual public or ...
s are also growing in importance to achieve
sustainable sanitation Sustainable sanitation is a sanitation system designed to meet certain criteria and to work well over the long-term. Sustainable sanitation systems consider the entire "sanitation value chain", from the experience of the user, excreta and waste ...
.


Understanding of health aspects

The Greek historian
Thucydides Thucydides (; grc, , }; BC) was an Athenian historian and general. His ''History of the Peloponnesian War'' recounts the fifth-century BC war between Sparta and Athens until the year 411 BC. Thucydides has been dubbed the father of " scientif ...
(c. 460 – c. 400 BC) was the first person to write, in his account of the
plague of Athens The Plague of Athens ( grc, Λοιμὸς τῶν Ἀθηνῶν}, ) was an epidemic that devastated the city-state of Athens in ancient Greece during the second year (430 BC) of the Peloponnesian War when an Athenian victory still seemed within r ...
, that diseases could spread from an infected person to others. The Mosaic Law, within the first five books of the Hebrew Bible, contains the earliest recorded thoughts of contagion in the spread of disease. Specifically, it presents instructions on quarantine and washing in relation to leprosy and venereal disease One theory of the spread of contagious diseases that were not spread by direct contact was that they were spread by
spore In biology, a spore is a unit of sexual or asexual reproduction that may be adapted for dispersal and for survival, often for extended periods of time, in unfavourable conditions. Spores form part of the life cycles of many plants, algae, ...
-like "seeds" (
Latin Latin (, or , ) is a classical language belonging to the Italic branch of the Indo-European languages. Latin was originally a dialect spoken in the lower Tiber area (then known as Latium) around present-day Rome, but through the power of the ...
: ''semina'') that were present in and dispersible through the air. In his poem, '' De rerum natura'' (On the Nature of Things, c. 56 BC), the Roman poet
Lucretius Titus Lucretius Carus ( , ;  – ) was a Roman poet and philosopher. His only known work is the philosophical poem ''De rerum natura'', a didactic work about the tenets and philosophy of Epicureanism, and which usually is translated into E ...
(c. 99 BC – c. 55 BC) stated that the world contained various "seeds", some of which could sicken a person if they were inhaled or ingested. The Roman statesman
Marcus Terentius Varro Marcus Terentius Varro (; 116–27 BC) was a Roman polymath and a prolific author. He is regarded as ancient Rome's greatest scholar, and was described by Petrarch as "the third great light of Rome" (after Vergil and Cicero). He is sometimes call ...
(116–27 BC) wrote, in his ''Rerum rusticarum libri III'' (Three Books on Agriculture, 36 BC): "Precautions must also be taken in the neighborhood of swamps ... because there are bred certain minute creatures which cannot be seen by the eyes, which float in the air and enter the body through the mouth and nose and there cause serious diseases." The Greek physician Galen (AD 129 – c. 200/216) speculated in his ''On Initial Causes'' (c. 175 AD that some patients might have "seeds of fever". In his ''On the Different Types of Fever'' (c. 175 AD), Galen speculated that plagues were spread by "certain seeds of plague", which were present in the air. And in his ''Epidemics'' (c. 176–178 AD), Galen explained that patients might relapse during recovery from fever because some "seed of the disease" lurked in their bodies, which would cause a recurrence of the disease if the patients did not follow a physician's therapeutic regimen. The
fiqh ''Fiqh'' (; ar, فقه ) is Islamic jurisprudence. Muhammad-> Companions-> Followers-> Fiqh. The commands and prohibitions chosen by God were revealed through the agency of the Prophet in both the Quran and the Sunnah (words, deeds, and ex ...
scholar
Ibn al-Haj al-Abdari Moḥammed ibn al-Hajj al-Abdari al-Fasi (or Mohammed Ibn Mohammed ibn Mohammed Abu Abdallah Ibn al-Hajj al-Abdari al-Maliki al-Fassi; ar, إبن الحاج العبدري الفاسي) also known simply as Ibn al-Haj or Ibn al-Hajj was a Morocca ...
(c. 1250–1336), while discussing Islamic diet and hygiene, gave advice and warnings about impurities that contaminate water, food, and garments, and could spread through the water supply. Long before studies had established the
germ theory of disease The germ theory of disease is the currently accepted scientific theory for many diseases. It states that microorganisms known as pathogens or "germs" can lead to disease. These small organisms, too small to be seen without magnification, invade ...
, or any advanced understanding of the nature of water as a vehicle for transmitting disease, traditional beliefs had cautioned against the consumption of water, rather favoring processed beverages such as beer,
wine Wine is an alcoholic drink typically made from fermented grapes. Yeast consumes the sugar in the grapes and converts it to ethanol and carbon dioxide, releasing heat in the process. Different varieties of grapes and strains of yeasts are ...
and
tea Tea is an aromatic beverage prepared by pouring hot or boiling water over cured or fresh leaves of ''Camellia sinensis'', an evergreen shrub native to East Asia which probably originated in the borderlands of southwestern China and norther ...
. For example, in the
camel caravan A camel train or caravan is a series of camels carrying passengers and goods on a regular or semi-regular service between points. Despite rarely travelling faster than human walking speed, for centuries camels' ability to withstand harsh condi ...
s that crossed Central Asia along the
Silk Road The Silk Road () was a network of Eurasian trade routes active from the second century BCE until the mid-15th century. Spanning over 6,400 kilometers (4,000 miles), it played a central role in facilitating economic, cultural, political, and rel ...
, the explorer
Owen Lattimore Owen Lattimore (July 29, 1900 – May 31, 1989) was an American Orientalist and writer. He was an influential scholar of History of China, China and Central Asia, especially Mongolia. Although he never earned a college degree, in the 1930s he was ...
noted, "The reason we drank so much tea was because of the bad water. Water alone, unboiled, is never drunk. There is a superstition that it causes blisters on the feet." One of the earliest understandings of waterborne diseases in Europe arose during the 19th century, when the Industrial Revolution took over Europe.
Waterborne diseases Waterborne diseases are conditions (meaning adverse effects on human health, such as death, disability, illness or disorders) caused by pathogenic micro-organisms that are transmitted in water. These diseases can be spread while bathing, washing ...
, such as
cholera Cholera is an infection of the small intestine by some strains of the bacterium ''Vibrio cholerae''. Symptoms may range from none, to mild, to severe. The classic symptom is large amounts of watery diarrhea that lasts a few days. Vomiting and ...
, were once wrongly explained by the
miasma theory The miasma theory (also called the miasmatic theory) is an Superseded scientific theories#Biology, obsolete medical theory that opinion, held that diseases—such as cholera, Chlamydia infection, chlamydia, or the Black Death—were caused by a ...
, the theory that bad air causes the spread of diseases. However, people started to find a correlation between
water quality Water quality refers to the chemical, physical, and biological characteristics of water based on the standards of its usage. It is most frequently used by reference to a set of standards against which compliance, generally achieved through tr ...
and waterborne diseases, which led to different
water purification Water purification is the process of removing undesirable chemicals, biological contaminants, suspended solids, and gases from water. The goal is to produce water that is fit for specific purposes. Most water is purified and disinfected for hu ...
methods, such as
sand filter Sand filters are used as a step in the water treatment process of water purification. There are three main types; rapid (gravity) sand filters, upward flow sand filters and slow sand filters. All three methods are used extensively in the water i ...
ing and chlorinating their drinking water. Founders of
microscopy Microscopy is the technical field of using microscopes to view objects and areas of objects that cannot be seen with the naked eye (objects that are not within the resolution range of the normal eye). There are three well-known branches of mic ...
,
Antonie van Leeuwenhoek Antonie Philips van Leeuwenhoek ( ; ; 24 October 1632 – 26 August 1723) was a Dutch microbiologist and microscopist in the Golden Age of Dutch science and technology. A largely self-taught man in science, he is commonly known as " the ...
and
Robert Hooke Robert Hooke FRS (; 18 July 16353 March 1703) was an English polymath active as a scientist, natural philosopher and architect, who is credited to be one of two scientists to discover microorganisms in 1665 using a compound microscope that h ...
, used the newly invented microscope to observe for the first time small material particles that were suspended in the water, laying the groundwork for the future understanding of waterborne pathogens and
waterborne diseases Waterborne diseases are conditions (meaning adverse effects on human health, such as death, disability, illness or disorders) caused by pathogenic micro-organisms that are transmitted in water. These diseases can be spread while bathing, washing ...
. In the 19th century, Britain was the center for rapid
urbanization Urbanization (or urbanisation) refers to the population shift from rural to urban areas, the corresponding decrease in the proportion of people living in rural areas, and the ways in which societies adapt to this change. It is predominantly the ...
, and as a result, many health and sanitation problems manifested, for example
cholera outbreaks and pandemics Seven cholera pandemics have occurred in the past 200 years, with the first pandemic originating in India in 1817. The seventh cholera pandemic is officially a current pandemic and has been ongoing since 1961, according to a World Health Organizat ...
. This resulted in Britain playing a large role in the development for public health. Before discovering the link between contaminated drinking water and diseases, such as cholera and other waterborne diseases, the
miasma theory The miasma theory (also called the miasmatic theory) is an Superseded scientific theories#Biology, obsolete medical theory that opinion, held that diseases—such as cholera, Chlamydia infection, chlamydia, or the Black Death—were caused by a ...
was used to justify the outbreaks of these illnesses. Miasma theory is the theory that certain diseases and illnesses are the products of "bad airs". The investigations of the physician
John Snow John Snow (15 March 1813 – 16 June 1858) was an English physician and a leader in the development of anaesthesia and medical hygiene. He is considered one of the founders of modern epidemiology, in part because of his work in tracing the so ...
in the
United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Europe, off the north-western coast of the continental mainland. It comprises England, Scotland, Wales and Nor ...
during the 1854 Broad Street cholera outbreak clarified the connections between waterborne diseases and polluted drinking water. Although the
germ theory of disease The germ theory of disease is the currently accepted scientific theory for many diseases. It states that microorganisms known as pathogens or "germs" can lead to disease. These small organisms, too small to be seen without magnification, invade ...
had not yet been developed, Snow's observations led him to discount the prevailing miasma theory. His 1855 essay ''On the Mode of Communication of Cholera'' conclusively demonstrated the role of the water supply in spreading the cholera epidemic in
Soho Soho is an area of the City of Westminster, part of the West End of London. Originally a fashionable district for the aristocracy, it has been one of the main entertainment districts in the capital since the 19th century. The area was develop ...
,''Concepts and practice of humanitarian medicine'' (2008) Par S. William Gunn, M. Masellis


with the use of a dot distribution map and statistical proof to illustrate the connection between the quality of the water source and cholera cases. During the 1854 epidemic, he collected and analyzed data establishing that people who drank water from contaminated sources such as the Broad Street pump died of cholera at much higher rates than those who got water elsewhere. His data convinced the local council to disable the water pump, which promptly ended the outbreak.
Edwin Chadwick Sir Edwin Chadwick KCB (24 January 18006 July 1890) was an English social reformer who is noted for his leadership in reforming the Poor Laws in England and instituting major reforms in urban sanitation and public health. A disciple of Util ...
, in particular, played a key role in Britain's sanitation movement, using the miasma theory to back up his plans for improving the sanitation situation in Britain. Although Chadwick brought contributions to developing public health in the 19th century, it was
John Snow John Snow (15 March 1813 – 16 June 1858) was an English physician and a leader in the development of anaesthesia and medical hygiene. He is considered one of the founders of modern epidemiology, in part because of his work in tracing the so ...
and William Budd who introduced the idea that cholera was the consequence of contaminated water, presenting the idea that diseases could be transmitted through drinking water. People found that purifying and filtering their water improved the water quality and limited the cases of waterborne diseases. In the German town Altona this finding was first illustrated by using a sand filtering system for its
water supply Water supply is the provision of water by public utilities, commercial organisations, community endeavors or by individuals, usually via a system of pumps and pipes. Public water supply systems are crucial to properly functioning societies. Thes ...
. A nearby town that didn't use any filtering system for their water suffered from the outbreak while Altona remained unaffected by the disease, providing evidence that the quality of water had something to do with the diseases. After this discovery, Britain and the rest of Europe took into account to filter their drinking water, as well as chlorinating them to fight off waterborne diseases like cholera.


See also

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List of water supply and sanitation by country This list of water supply and sanitation by country provides information on the status of water supply and sanitation at a national or, in some cases, also regional level. Water supply and sanitation by country * Water supply and sanitation in Afg ...
* History of water filters *
Laundry Laundry refers to the washing of clothing and other textiles, and, more broadly, their drying and ironing as well. Laundry has been part of history since humans began to wear clothes, so the methods by which different cultures have dealt with ...
*
Night soil Night soil is a historically used euphemism for human excreta collected from cesspools, privies, pail closets, pit latrines, privy middens, septic tanks, etc. This material was removed from the immediate area, usually at night, by workers employ ...
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Rainwater harvesting Rainwater harvesting (RWH) is the collection and storage of rain, rather than allowing it to run off. Rainwater is collected from a roof-like surface and redirected to a tank, cistern, deep pit (well, shaft, or borehole), aquifer, or a reservoir ...
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Water industry The water industry provides drinking water and wastewater services (including sewage treatment) to residential, commercial, and industrial sectors of the economy. Typically public utilities operate water supply networks. The water industry doe ...


References


Further reading

* * Juuti, Petri S., Tapio S. Katko, and Heikki S. Vuorinen. ''Environmental history of water: global views on community water supply and sanitation'' (IWA Publishing, 2007) * {{wastewater Plumbing Bathrooms Human ecology