Three Valleys Water

Three Valleys Water supplies water services to parts of Bedfordshire, Berkshire, Buckinghamshire, Essex, Hertfordshire, Surrey, and the London Boroughs of Barnet, Brent, Ealing, Harrow, Hillingdon and Enfield.

Three Valleys Water was formed when Colne Valley, Rickmansworth and Lee Valley Water companies merged in 1994. Three Valleys Water later merged with North Surrey Water in 2000.

Three Valleys Water is owned by Veolia Water, which owns two other water supply companies in the South East of England - Folkestone and Dover Water and Tendring Hundred Water. Together, these companies provide 900 million litres of water a day to a population of 3.2 million. They employ around 1,050 people and have a total turnover of £186 million.

Three Valleys Water is the largest water only supplier in the UK. It provides over 800 million litres of water every day to over three million customers. 42% of Three Valleys Water is derived from rivers and reservoirs and 58% from boreholes and aquifers. Three Valleys Water then supplies water via 83 treatment works, 137 service reservoirs and 14,277km water mains (source: Drinking Water Inspectorate).

Three Valleys Water is a water only supplier, so Three Valleys Water customers will have their sewerage services supplied by Anglian Water or Thames Water, depending on where they live in the water supply region.

As two separate companies provide water and sewerage services, Three Valleys Water customers may receive separate bills for each service or Three Valleys Water may bill them for both services and collect the money on behalf of the sewerage company.

To be classed as wholesome, water must comply with the water quality standards set out in the Water Supply (Water Quality) Regulations 1989.

In 2003, 75,711 tests were carried out on samples taken by Three Valleys Water. 99.89% of these tests complied with the Regulations (source: http://www.dwi.gov.uk).

Three Valleys Water is generally a hard water area. However, water hardness levels can vary within each area. Three Valleys Water can provide you with further information about water hardness in your particular area.

Three Valleys Water sets out levels of service domestic customers can expect. If Three Valleys Water fails to meet these levels then customers may be entitled to compensation.