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 The Drinking Water Inspectorate (DWI) regulates public water supplies in England and Wales.

DWI is responsible for assessing the quality of drinking water in England and Wales, taking enforcement action if standards are not being met, and appropriate action when water is unfit for human consumption.

Drinking Water 2007
The DWI 18th Annual Report

Published 26th June 2008

Whats New

05 March 2009 Information Letter 04/2009 - Submission of raw water monitoring data to the Drinking Water Inspectorate.(PDF 144 KB)
27 February 2009 Information Letter 03/2009 - Further guidance on changes within the Operations team and the Inspector Liaison role.
19 January 2009 Information Letter 02/2009 - Changes to the process for assessment of drinking water quality event notifications. (PDF 106 KB)

 Consumer Information - About DWI

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Drinking Water Inspectorate

55 Whitehall, London, SW1A 2EY
Telephone : 020 7270 3370

Department for Environment,
Food & Rural Affairs (DEFRA)

The National Assembly for Wales /
Cynulliad Cenedlaethol Cymru

Website last updated
5 March 2009

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DWI strives to ensure that the information on this website is set out in an accessible and understandable manner.
We welcome any comments about our website, including suggestions for additional topics that might be useful to our customers.