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.


The Drinking Water Inspectorate is investigating the event regarding the precautionary boil water notice issued to United Utilities customers in the areas of Blackpool, Chorley, Fylde, Preston, South Ribble and Wyre. If you are in the area affected you can obtain the latest information about the status of your supply from United Utilities. To check if you need to boil your water please use the postcode checker.


What's new?

22 July 2015

New Chief Inspector of Drinking Water announced.

9 July 2015

Drinking water 2014 published.

7 July 2015

Information Letter 02/2015 - Legal Instruments - Processes for reporting on, agreeing changes to and closure/revocation

25 March 2015

Sembcorp Bournemouth Water plead guilty to supplying water unfit for human consumption and failure to adequately operate a treatment process (PDF 143KB)

27 February 2015

Information Letter 01/2015 - Regulation 28 reporting requirements


Page last modified: 12 August 2015
Page reviewed: 13 August 2015

Drinking Water Inspectorate