Welcome to DWI

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.


What's new?

19 July 2017

United Utilities plead guilty to the supply of water unfit for human consumption - see DWI Statement (PDF 51KB)

13 July 2017

The Drinking Water Inspectorate has published its annual report for public and private water supplies in England and Wales covering 2016. The reports covers the quality of public drinking water supplies and reports on the progress of local authorities in the regulation of private water supplies. Alongside the report are published sample results and performance statistics for companies. Also published today is the business performance report covering the activities of the Inspectorate.

3 July 2017

New date for Franklaw hearing - Following an adjournment, the Court has set a new date of 19th July for the hearing. Please see the operational note (PDF 72KB) for details

23 June 2017

Severn Trent Water Ltd have been cautioned over the Castle Donington event (PDF 266KB) where 3,700 properties received water with elevated chlorine.

8 June

DWI meets requirements of Regulatory Policy Committee (PDF 181KB)

8 May

Information Letter 02/2017 - Further guidance on Chromium in drinking water (PDF 122KB).


Page last modified: 19 July 2017
Page reviewed: 19 July 2017

Drinking Water Inspectorate