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?

25 October 2017

Drinking Water Inspectorate publishes investigation report into Franklaw event

The Drinking Water Inspectorate has today published the full investigation report (PDF 1.63MB) into the event in August-September 2015 when over 700,000 consumers in parts of Lancashire were required to boil their water due to the detection of Cryptosporidium in drinking water supplies

10 October 2017

United Utilities fined for drinking water offence- see DWI Press Release (PDF 45KB)

12 September 2017

Information Letter 03/2017 (PDF 119K) - Update to guidance documents including a guidance note on long term planning for drinking water quality (PDF 202KB)



Page last modified: 1 November 2017
Page reviewed: 1 November 2017

Drinking Water Inspectorate