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?

10 January 2019

Northumbrian Water fined for drinking water offences (PDF 295KB)

21 December 2018

Publication of Information Letter 3/2018 (PDF 127KB)"METALDEHYDE - Recent developments and actions required"

16 October 2018

Publication of the revised Guidance on the Notification of Events,

9 October 2018

DWI have entered a Memorandum of Understanding (PDF 823KB) with Lloyds Register regarding the Risk Management Assessment Scheme.

3 September 2018

Publication of revised guidance on implementing the Water Supply (Water Quality) Regulations in England and Wales

21 August 2018

Publication of Information Letter 2/2018 "Monitoring Variations under Regulation 9 and Reporting Requirements under Regulation 28"

14 August 2018

Revised ERI and CRI definitions to improve their clarity are available on the Price review process webpage.



Page last modified: 10 January 2019.
Page reviewed: 10 January 2019

Drinking Water Inspectorate