Drinking water 2015

A report by the Chief Inspector of drinking water

This report is in PDF format. The Adobe® Acrobat Reader® can be freely downloaded here.

The Drinking Water Inspectorate annual report Drinking water 2015 provides an overview of the quality of public and private water supplies in England and Wales. It comprises of the following:

Chief Inspector's Letter to Ministers (for England and Wales)

The letters from the Chief Inspector to the Ministers in England and in Wales contain a high level overview of findings for the year.

Letter to Minister - England (PDF 109KB)
Letter to Minister - Wales (PDF 109KB)

Summary reports

Summary of the Chief Inspector’s report for drinking water in England (PDF 836KB)
Summary of the Chief Inspector’s report for drinking water in Wales (in English) (PDF 782KB)
Summary of the Chief Inspector’s report for drinking water in Wales (in Welsh) (PDF 837KB)

Public water supplies - regional reports

The regional reports cover four regions of England and additionally Wales and summarise the testing and results of water quality tests, events and technical audit activity in the region.

Central and Eastern region (PDF 2.6MB)
London and South East region (PDF 2.5MB)
Northern region (PDF 2.5MB)
Western region (PDF 2.1MB)
Wales (in English)  (PDF 2.4MB)
Wales (in Welsh) (PDF 2.3MB)

Private water supplies

Presented as separate reports for England and Wales and publishing numbers and types of supplies, a summary of monitoring results and case studies.

England (PDF 3.7MB)
Wales (in English) (PDF3.5MB)
Wales (in Welsh) (PDF3.7MB)

Company data look up tables

Affinity Water (PDF 55KB)
Albion Water (PDF 100KB)
Anglian Water (PDF 111KB)
Bournemouth Water (PDF 84KB)
Bristol Water (PDF 85KB)
Cambridge Water (PDF 80KB)
Cholderton and District Water (PDF 113KB)
Dee Valley Water (PDF 57KB)
Dŵr Cymru Welsh Water (PDF 128KB)
Essex and Suffolk Water (PDF 108KB)
Hartlepool Water (PDF 83KB)
Independent Water Networks (PDF 124KB)
Northumbrian Water (PDF 82KB)
Peel Water Networks (PDF 83KB)
Portsmouth Water (PDF 86KB)
Severn Trent Water (PDF 131KB)
South East Water (PDF 79KB)
South Staffordshire Water (PDF 74KB)
South West Water (PDF 77KB)
Southern Water (PDF 78KB)
SSE Water (PDF 110KB)
Sutton and East Surrey Water (PDF 56KB)
Thames Water (PDF 76KB)
United Utilities (PDF 89KB)
Veolia Water Projects (PDF 84KB)
Wessex Water (PDF 107KB)
Yorkshire Water (PDF 111KB)

Water company statistics (PDF 493KB)

Drinking water quality events in 2015 (PDF 1.2MB)

Prosecution and Cautions (PDF 258KB)


Page reviewed: 14 July 2016
Page modified: 5 August 2016

Drinking Water Inspectorate