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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 2024

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 2024 published in July 2025.

View the 2024 report

Triennial Reports 2020-2022

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 2024 – Public Supplies England – Annual Report Published

We have published Drinking Water 2024 – Public Supplies England Annual Report on our website.

Publication of research report “Organophosphorus Flame Retardants – Risk to Drinking Water in England and Wales – Phase 2”

The DWI commissioned a follow up study on the risk to drinking water from Organophosphorus Flame Retardants. The full report and executive summary can be…

DWI Job Vacancies

Read more about our Inspector job vacancies – DWI Job Vacancies.

Advisory group report published

Drinking water quality standards in England and Wales: Advisory group recommendations and full report has been published on our website.

Independent Water Commission – Review of the water sector

The Inspectorate has published a response to the Independent Water Commission’s review of the water sector. Independent Water Commission: review of the water sector –…

Chlorine podcast published

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