The Drinking Water Inspectorate (DWI) was formed in 1990 to provide independent reassurance that water supplies in England and Wales are safe and drinking water quality is acceptable to consumers.

Drinking Water 2019

Safe, clean drinking water is vital to public health and the wellbeing of our society, now and into the future. This is the central tenet of the vision and strategy of the Drinking Water Inspectorate published in April 2020

View the 2019 report

Highlights

What we do

Consumers

Water companies

Private water supplies

Drinking Water Products

Research

What’s new?

Publication of Information Letter 06/2020

Assessment of the limitations for chemicals and treatment products intended for the treatment of drinking water.

Drinking Water 2020 – Quarter 1 & 2 have been published

Click here to view

Publication of Information Letter 05/2020

Chloramination disinfection and associated risks of cyanide formation in treated water

Government and the water industry regulators in England have issued a joint letter to water companies

Green economic recovery – the water industry’s role in building a resilient future

Drinking Water 2019 – Quarter 4 has been published as part of the Chief Inspector’s Report 2019

The Drinking Water Inspectorate has published its annual reports for public and private water supplies in England and Wales covering 2019

The reports cover the quality of public drinking water supplies and reports on the progress of local authorities in the regulation of private water supplies.…

DWI has published Long Term Planning Guidance for water companies

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Regions in England and Wales

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Water Companies

Use our map to find your local water company

Find contact details, report a problem, look at incidents in your area.

See ongoing improvement in your area, how your water company is improving and find the water quality in your area.

Find your local company

Contact DWI

Water quality

If you are concerned about the quality of your drinking water you should contact your water company in the first instance. A number for your water company can be found here.

 

Learn more about your water

The Drinking Water Inspectorate provides information and advice to consumers on the quality of drinking water.

Advice for finding a plumber
Algae in drinking water
Animals in drinking water
Bills and compensation
Blue water/Copper in drinking water
Boil water notice
Bottled water
Chlorine

View all leaflets