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?

21 August 2017

Updates to Guidance notes on Water Supply (Water Quality) Regulations. The updates arise from various advice and guidance provided previously in Information Letters.

17 August 2017

New date announced for United Utillites sentence hearing on Franklaw drinking water event

14 August 2017

Southern Water Services Ltd plead guilty to the supply of water unfit for human consumption - see DWI Press Release (PDF 99KB)

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.


Page last modified: 17 August 2017
Page reviewed: 17 August 2017

Drinking Water Inspectorate