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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?

DWI Job Vacancy – Principal Inspector

The Drinking Water Inspectorate is seeking a Principal Inspector to support the Senior Management Team in the delivery of the Inspectorate’s vision and strategic objectives.…

DWI Job Vacancy – Senior Policy Advisor

The Drinking Water Inspectorate is seeking an enthusiastic Senior Policy Advisor to lead on areas of policy interface to achieve its objectives. Read more in…

World Health Organization’s manual on Water Safety Planning now available

A second edition of the World Health Organization’s manual on Water Safety Planning is now available. As a practical guide to implementing Water Safety Planning…

Drinking Water 2022 – Quarter 3 published

We have published Drinking Water 2022 – Quarter 3 report.

Publication of research report “Persistent, Mobile and Toxic Substances – Risk to drinking water in England & Wales” (Phase 2)

DWI commissioned this project to understand the potential risk from 22 Persistent, Mobile and Toxic (PMT) substances to drinking water sources in England and Wales.…

Water Quality regulatory standards advisory board

The Drinking Water Inspectorate is creating an Advisory Standards Board of experts to make recommendations to Ministers on the future drinking water standards. The Inspectorate…
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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