Rivington Water Treatment Works is a

water treatment Water treatment is any process that improves the quality of water to make it appropriate for a specific end-use. The end use may be drinking, industrial water supply, irrigation, river flow maintenance, water recreation or many other uses, inc ...

plant in

Rivington Rivington is a village and civil parish of the Borough of Chorley, Lancashire, England, occupying . It is about southeast of Chorley and about northwest of Bolton. Rivington is a rural area consisting primarily of agricultural grazing land, ...

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 Lancash ...

, England. It is located below the

Lower Rivington Reservoir Lower Rivington Reservoir is at the end of the Rivington chain of reservoirs in Lancashire, England, with Upper Rivington Reservoir to the north, and Rivington Water Treatment Works to the south. The Rivington chain primarily supplies 70,000 hou ...

, the last in the Rivington chain of reservoirs. The first treatment works, a slow-sand filter plant on the site opened in 1860, supplying water to Liverpool. The present works was built in 1994, and in 2007 was the largest automated three-stage plant operated by

United Utilities United Utilities Group plc (UU), the United Kingdom's largest listed water company, was founded in 1995 as a result of the merger of North West Water and NORWEB. The group manages the regulated water and waste water network in North West Engla ...

, the water is now disinfected by adding small amounts of

chlorine Chlorine is a chemical element with the symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them. Chlorine i ...

. Most of its output supplies customers in the Wigan area. Raw water from the Rivington chain of reservoirs can be supplied to the

Thirlmere Aqueduct The Thirlmere Aqueduct is a 95.9-mile-long (154.3-kilometre-long) pioneering section of water supply system in England, built by the Manchester Corporation Water Works between 1890 and 1925. Often incorrectly thought of as one of the longest tun ...

via a pipeline downstream of the Lower Rivington Reservoir embankment and treated water via a pumping main and the Treated Water Pumping Station on the Rivington Water Treatment Works site. .

References

Rivington {{Lancashire-geo-stub