A report by the Chief Inspector of drinking water

The Drinking Water Inspectorate annual report Drinking water 2019 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 – Wales

Public water supplies

Annual Summary reports

Quarterly reports published

CRI and ERI

Presentation Slides

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

Wales

Drinking water quality events in 2019

Top 50 ERI scoring events (PDF 230KB) showing company actions and DWI findings
All other events (PDF 519KB)

Top 50 ERI scoring events

All other events

Company data

Company name

Sample Results

Company statistics and company performance data

Affinity Water

Download (PDF 108KB)

Download (PDF 13KB)

Albion Water

Download (PDF 106KB)

Download (PDF 13KB)

Albion Eco

Download (PDF 101KB)

Download (PDF 13KB)

Anglian Water

Download (PDF 80KB)

Download (PDF 13KB)

Bournemouth Water

Download (PDF 115KB)

Download (PDF 13KB)

Bristol Water

Download (PDF 124KB)

Download (PDF 13KB)

Cambridge Water

Download (PDF 149KB)

Download (PDF 13KB)

Dŵr Cymru Welsh Water

Download (PDF 117KB)

Download (PDF 88KB)

Essex and Suffolk Water

Download (PDF 118KB)

Download (PDF 13KB)

Hafren Dyfrdwy

Download (PDF 129KB)

Download (PDF 30KB)

Icosa Water

Download (PDF 90KB)

Download (PDF 13KB)

Independent Water Networks

Download (PDF 111KB)

Download (PDF 13KB)

Leep Water Utilities

Download (PDF 130KB)

Download (PDF 13KB)

Northumbrian Water

Download (PDF 118KB)

Download (PDF 13KB)

Portsmouth Water

Download (PDF 139KB)

Download (PDF 13KB)

Severn Trent Water

Download (PDF 130KB)

Download (PDF 29KB)

South East Water

Download (PDF 120KB)

Download (PDF 13KB)

South Staffordshire Water

Download (PDF 118KB)

Download (PDF 13KB)

South West Water

Download (PDF 115KB)

Download (PDF 30KB)

Southern Water

Download (PDF 129KB)

Download (PDF 13KB)

SSE Water

Download (PDF 132KB)

Download (PDF 13KB)

SES Water

Download (PDF 114KB)

Download (PDF 13KB)

Thames Water

Download (PDF 121KB)

Download (PDF 13KB)

United Utilities

Download (PDF 115KB)

Download (PDF 13KB)

Veolia Water Projects

Download (PDF 105KB)

Download (PDF 13KB)

Wessex Water

Download (PDF 143KB)

Download (PDF 13KB)

Yorkshire Water

Download (PDF 129KB)

Download (PDF 31KB)

Prosecution and Cautions

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