Thames Water

Thames Water supplies water and sewerage services to London and a large proportion of central Southern England.

Thames Water is part of RWE, a leading water corporation in the UK, Germany, central Eastern Europe and the USA, providing clean water and sanitation for 70 million customers worldwide.

Thames Water employs 6,800 people and provides water and sewerage services to 13 million customers in London and the Thames Valley region, and an additional one and half million billed customers across Wales.

Thames Water derives 76% of its water supplies from rivers and reservoirs and the other 24% from boreholes and aquifers. Thames Water then supplies the water via 101 treatment works, 368 reservoirs and 31,300km of water mains (source: Drinking Water Inspectorate).

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, 541,902 tests were carried out on samples taken by Thames Water. 99.91% of these tests complied with the Regulations (source: http://www.dwi.gov.uk).

Thames Water is generally a soft water area. However water hardness levels can vary within each area. Thames Water can provide you with further information about water hardness in your particular area.