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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 2021

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 2021 published in July 2022.

View the 2021 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?

Drinking Water 2021 Private Water Supplies published

Drinking Water 2021 Private Water Supplies is the 12th report published by the Drinking Water Inspectorate which covers private water supplies in England and Wales.

Published Guidance Note: Long term planning for the quality of drinking water supplies

A guidance note on long term planning for the quality of drinking water supplies has been published.

Drinking Water 2021 published

Drinking Water 2021 is the 32nd report published by the Drinking Water Inspectorate and covers public water supplies in England and Wales.

Publication of Information Letter 03/2022

Information Letter 03/2022 PFAS guidance has been published.

Press Release – Southern Water fined for drinking water offence

The Drinking Water Inspectorate (DWI) have issued a Press Release after sentencing took place yesterday in the case taken by DWI against Southern Water, at…

StreamLine

We are excited to launch StreamLine, the regulatory advice service for innovators and businesses in England and Wales. StreamLine is run jointly by the Drinking…
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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