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Welcome to the

Drinking Water Inspectorate

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 2023

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. Drinking Water 2023 published in July 2024.

View the 2023 report

Triennial Reports 2017-2019

Three yearly report for both England and Wales on the quality of drinking water to inform consumers

View the triennial reports

Highlights

What we do

Consumers

Water companies

Private water supplies

Drinking Water Products

Research

What’s new?

Chlorine podcast published

We have published our second On Tap podcast on our website.

Lead podcast published

We have published our first On Tap podcast on our website.

Publication of Research report “Cyanotoxins in raw surface waters”

The DWI commissioned research into cyantoxins in raw surface waters to determine the scientific relevance of any prescribed standard for Microcystin-LR (MC-LR), its occurrence in…

Drinking Water 2023 – Public Supplies Wales – Annual Report Published

We have published Drinking Water 2023 – Public Supplies Wales Annual Report.

Drinking Water 2023 – Wales – Private Water Supplies – Annual Report Published

We have now published the Drinking Water 2023 – Wales – Private Water Supplies report on our website.

Drinking Water 2023 – Public Supplies England – Annual Report Published

We have published Drinking Water 2023 – Public Supplies England Annual Report. Drinking water quality in England is excellent, with public supplies consistently meeting the…

Statement from the Chief Inspector of Drinking Water – May 2024

The Drinking Water Inspectorate was notified of the contamination of drinking water supplies in Brixham, in Devon, by South West Water, and we are continuing…

Water supply issues in Brixham area

The latest information can be found on the .GOV.UK website at Water supply issues in Brixham area – GOV.UK (www.gov.uk)

Drinking Water 2023 – England – Private Water Supply – Annual Report Published

We have now published the Drinking Water 2023 – England – Private Water Supply report on our website.
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Regions in England and Wales

25

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 Us

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