The Lee Valley Reservoir Chain is located in the Lee Valley, and comprises 13 reservoirs that supply drinking water 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 majo ...

. The Reservoir Chain is a major geographic constraint; together with 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 R ...

it is one of the two significant topographic features that divide the capital and define the communities on either side. The

Lower Lea Valley The Lower Lea Valley is the southern end of the Lea Valley which surrounds the River Lea. It is part of the Thames Gateway redevelopment area and was the location of the 2012 Summer Olympics. A 2005 documentary ''What Have You Done Today, Mervyn ...

, downstream of the reservoirs, is more integrated, with better east–west transport connectivity.

Geographic significance

Aerial view of Walthamstow Reservoirs from the north

The Chain separates the London Boroughs of

Haringey The London Borough of Haringey (pronounced , same as Harringay) is a London borough in North London, classified by some definitions as part of Inner London, and by others as part of Outer London. It was created in 1965 by the amalgamation of ...

and

Enfield Enfield may refer to: Places Australia * Enfield, New South Wales * Enfield, South Australia ** Electoral district of Enfield, a state electoral district in South Australia, corresponding to the suburb ** Enfield High School (South Australia) ...

to the west, from

Waltham Forest The London Borough of Waltham Forest () is a London borough in north-east London, England. Its population is estimated to be 276,983 in 2019. It borders five other London boroughs: Enfield to the north-west, Haringey to the west, Hackney to t ...

and

Essex Essex () is a county in the East of England. One of the home counties, it borders Suffolk and Cambridgeshire to the north, the North Sea to the east, Hertfordshire to the west, Kent across the estuary of the River Thames to the south, and G ...

in the east. The corridor includes 13 reservoirs, two to three channels of the Lee, as well as marshes and parkland, up to a mile wide. During WWI, the settlements on both sides of the Lea were badly hit by Germany Army and Navy airship raids. It is believed the crews mistook the Reservoir Chain for the Thames and released their bombs on what they took to be central London. The

Boundary Commission A boundary commission is a legal entity that determines borders of nations, states, constituencies. Notable boundary commissions have included: * Afghan Boundary Commission, an Anglo-Russian Boundary Commission, of 1885 and 1893, delineated the no ...

treats the Thames and Lea as natural barriers within London. When reviewing the boundaries of London's parliamentary constituencies, it concludes that any constituency spanning either river would be artificial and not reflect local communities or identities. The 2018 review compromised on this, allowing a cross-Lea constituency further south, in the Lower Lea where the communities on each side are more integrated due to greater quantity and quality of the road and rail links across the valley. The corridor is part of the

Metropolitan Green Belt The Metropolitan Green Belt is a statutory green belt around London, England. It comprises parts of Greater London, Berkshire, Buckinghamshire, Essex, Hertfordshire, Kent and Surrey, parts of two of the three districts of Bedfordshire and a s ...

and its national and international significance for wildlife is reflected by

SSSI A Site of Special Scientific Interest (SSSI) in Great Britain or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland is a conservation designation denoting a protected area in the United Kingdom and Isle of ...

Ramsar Ramsar may refer to: * Places so named: ** Ramsar, Mazandaran, city in Iran ** Ramsar, Rajasthan, village in India * Eponyms of the Iranian city: ** Ramsar Convention concerning wetlands, signed in Ramsar, Iran ** Ramsar site, wetland listed in ...

and

SPA A spa is a location where mineral-rich spring water (and sometimes seawater) is used to give medicinal baths. Spa towns or spa resorts (including hot springs resorts) typically offer various health treatments, which are also known as balneoth ...

designations. Lying between some of Londons's most densely populated areas, the Reservoir Chain and associated open land provides a highly valued ecological, landscape and recreational resource for the people of

north North is one of the four compass points or cardinal directions. It is the opposite of south and is perpendicular to east and west. ''North'' is a noun, adjective, or adverb indicating Direction (geometry), direction or geography. Etymology T ...

and

east East or Orient is one of the four cardinal directions or points of the compass. It is the opposite direction from west and is the direction from which the Sun rises on the Earth. Etymology As in other languages, the word is formed from the fa ...

London.

Reservoirs

The following waters are located in the

London Borough of Enfield The London Borough of Enfield () is a London boroughs, London borough in North London. It borders the London boroughs of London Borough of Barnet, Barnet to the west, London Borough of Haringey, Haringey to the south, and London Borough of Walt ...

and are known collectively as the Chingford Reservoirs, which are a

Site of Special Scientific Interest A Site of Special Scientific Interest (SSSI) in Great Britain or an Area of Special Scientific Interest (ASSI) in the Isle of Man and Northern Ireland is a conservation designation denoting a protected area in the United Kingdom and Isle of ...

: *

King George V Reservoir The King George V Reservoir, also known as King George's Reservoir, is located in the London Borough of Enfield and is part of the Lee Valley Reservoir Chain that supplies London with drinking water. The storage reservoir is bordered by Sewardstone ...

William Girling Reservoir The William Girling Reservoir is located in the London Borough of Enfield and is part of the Lee Valley Reservoir Chain that supplies London with drinking water. It is named after William Girling OBE, a chairman of the Metropolitan Water Board (M ...

The following waters, together known as the

Walthamstow Reservoirs Walthamstow Wetlands is a nature reserve in Walthamstow, east London, adjacent to the historic Essex-Middlesex border on the River Lea. It is focused on the Walthamstow Reservoirs, built by the East London Waterworks Company between 1853 and 1 ...

, are located in the

London Borough of Waltham Forest The London Borough of Waltham Forest () is a London borough in north-east London, England. Its population is estimated to be 276,983 in 2019. It borders five other London boroughs: Enfield to the north-west, Haringey to the west, Hackney to th ...

and, with the exception of one, form a

: *

Lockwood Reservoir Lockwood Reservoir is located in Walthamstow in the London Borough of Waltham Forest. It is one of the ten Walthamstow Reservoirs, which are part of the Lee Valley Reservoir Chain. The reservoirs supply drinking water to London and are owned ...

High Maynard Reservoir High Maynard Reservoir is located in Walthamstow in the London Borough of Waltham Forest. The storage reservoir is one of the Lee Valley Reservoir Chain and supplies drinking water to London. History The reservoir was built in the mid-19th cen ...

Low Maynard Reservoir Low Maynard Reservoir is located in Walthamstow in the London Borough of Waltham Forest. The storage reservoir is part of the Lee Valley Reservoir Chain and supplies drinking water to London. History The reservoir was constructed in the mid 19t ...

East Warwick Reservoir East Warwick Reservoir is located in the London Borough of Waltham Forest at Walthamstow. The storage reservoir is part of the Lee Valley Reservoir Chain and supplies drinking water to London. The reservoir is owned by Thames Water. History The ...

West Warwick Reservoir West Warwick Reservoir is located in the London Borough of Waltham Forest at Walthamstow. The storage reservoir is part of the Lee Valley Reservoir Chain, which supplies drinking water to London. It is owned by Thames Water. History The reservo ...

* Unnamed reservoirs numbered 1 to 5 *

Banbury Reservoir Banbury Reservoir is located in the London Borough of Waltham Forest at Walthamstow. It is one of the storage reservoirs in the Lee Valley Reservoir Chain. The reservoir is owned by Thames Water. History The reservoir, which was completed in 19 ...

(The only reservoir that is not part of a SSSI) The reservoirs have the following characteristics:

Water supply

The reservoirs are fed by the following waters: *

River Lee Diversion The River Lee Diversion is located in the Lea Valley, close to Enfield Lock and to the north east corner of the King George V Reservoir. History As its name implies, the River Lea was diverted to accommodate the construction of the Chingford ...

River Lee Flood Relief Channel The Lee Flood Relief Channel (FRC) is located in the Lea Valley and flows between Ware, Hertfordshire, and Stratford, east London. Work started on the channel in 1947 following major flooding and it was fully operational by 1976. The channel in ...

* New River * The Thames-Lee Water Main

Water treatment

After being stored in the above reservoirs the water is piped to the

Coppermills Water Treatment Works The Coppermills Water Treatment Works is a large water treatment works in the Lea Valley in east London. Completed in 1969 by the Metropolitan Water Board, it is now owned and operated by Thames Water. In 2009, Coppermills was connected to the Tha ...

to be treated. In 2006 a smaller water treatment works was also built at Chingford at the edge of the William Girling and King George V reservoirs.

References

{{authority control Thames Water reservoirs Reservoirs in London

Geographic significance

Reservoirs

Water supply

Water treatment

See also

References