Water quality


Our job is to ensure we deliver the highest quality drinking water to your taps every day.

The quality of your water supply is monitored continually, at every stage of its journey. We take samples every day and carry out thousands of tests a year at our state-of-the-art laboratory in Farnborough, Hampshire, to check your water is safe.

We operate within one of the strictest systems of regulation in the world and are closely monitored by the Drinking Water Inspectorate (DWI), which reports to the government.

The tests we carry out for the DWI check for more than 100 substances and also analyse the taste and appearance of water supplies. We test to European standards and additional, tougher standards set by the government in the UK.

Find out more:

Read our leaflet: Water Quality - making it crystal clear

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Check your water hardness and quality

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What does it mean? Read our Water Quality Explained leaflet

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