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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 2022

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 2022 published in July 2023.

View the 2022 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?

The application of the Water Industry Act 1991, Water Supply (Water Quality) Regulations 2016 (as amended) to proposed new water recycling or desalination schemes

We have now published Information letter 03/2023.

Drinking Water 2022 – Public Supplies Wales – Annual Report Published

We have now published Drinking Water 2022 – Public Supplies Wales Annual Report.

Drinking Water 2022 – Public Supplies England – Annual Report Published

We have now published Drinking Water 2022 – Public Supplies England Annual Report.

Drinking Water 2022 – England – Private Water Supply – Annual Report Published

We have published Drinking Water 2022 – England – Private Water Supply – Annual Report.

Drinking Water 2022 – Wales – Private Water Supply – Annual Report Published

We have published Drinking Water 2022 – Wales – Private Water Supply – Annual report.

30 May 2023 – Wessex Water Services Limited fined for drinking water offence 

The Drinking Water Inspectorate has issued a press release after sentencing took place in the case taken by the Inspectorate against Wessex Water Services Limited.…
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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