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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 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?

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. Our work – Drinking Water Inspectorate

Publication of research report “Bench-Scale Water Treatment Efficacy Study of PFAS Removal”

DWI and UKWIR jointly funded research into a Bench-scale water treatment efficacy study of PFAS removal. The full report, executive summary and the preliminary review…

Advisory group report published

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

DWI Job Vacancies

Learn about our Inspector job vacancies – Work for the DWI.

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…
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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