Wednesday, October 7, 2026

Water Data Prize

Water Data

England's water companies ranked by pollution record, worst first

All water statistics
Environment Agency rating, 2021 to 2024: fewer stars means a worse pollution record, stars out of 16
Thames Water7Southern Water7South West Water7Anglian Water8Yorkshire Water9Wessex Water10Northumbrian Water12United Utilities13Severn Trent Water16Thames Water7Southern Water7South West Water7Anglian Water8Yorkshire Water9Wessex Water10Northumbrian Water12United Utilities13Severn Trent Water16
33
incidents
Serious pollution incidents at Thames Water in 2024, out of 75 across England
292,119
spills in 2025
Times sewage spilled from storm overflows in England in 2025
75
incidents
Serious pollution incidents by water companies in England in 2024
See the table and sources

Utilities

Rates, pipes, plants and the people who run them
All Utilities

Water Data

Statistics, charts and rankings
All Water Data