Friday, October 9, 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
A hand-dug well with a rope winch and a yellow water container in rural Kitale, Kenya Statistics

African countries ranked by access to basic drinking water

Updated October 7, 2026
Yellow jerrycans and buckets lined up at a public water tap Statistics

Clean water access statistics

Updated October 5, 2026
A row of steel hand-washing basins, each labelled water or soap Statistics

Countries ranked by reported cholera cases

Updated October 7, 2026
An old open well with a wooden winch beside a farm track Statistics

Countries where the most people lack safe drinking water

Updated October 7, 2026
Two girls carrying yellow water containers on their heads across dry land Statistics

Countries where the most people spend over 30 minutes collecting water

Updated October 7, 2026
Clear water flowing from a chrome tap Statistics

Countries with the best drinking water, ranked

Updated October 6, 2026
Dry, cracked earth where water has gone Statistics

Countries with the worst water shortage, ranked

Updated October 6, 2026
A laboratory worker in blue gloves holds a beaker of water beside testing equipment Statistics

Drinking water quality statistics

Updated October 5, 2026
A hand holding a glass under a running kitchen tap Statistics

England's drinking water companies ranked by compliance risk

Updated October 7, 2026
Pipes discharging dirty, foaming water into a river, seen from above Statistics

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

Updated October 7, 2026
Swimmers in a deep blue sea pool among white rocks on the coast Statistics

European countries ranked by bathing water quality

Updated October 6, 2026
Water dripping from a joint in a chrome pipe Statistics

European countries that lose the most water to leaks

Updated October 8, 2026
Water running from a kitchen tap into a black sink Statistics

European countries with the most expensive tap water

Updated October 8, 2026
A pipette dropping water into a laboratory test tube Statistics

US states where PFAS turns up in the most water systems

Updated October 8, 2026
A town water tower on tall legs against an evening sky Statistics

US states with the most drinking water violations

Updated October 7, 2026
Old metal pipes laid bare in a dug-up street Statistics

US states with the most lead water pipes

Updated October 8, 2026
Water meters fitted to household supply pipes Statistics

Water bills by company in England and Wales, 2026-27

Updated October 7, 2026
Water spraying from a leaking joint in a water pipe Statistics

Water companies in England ranked by leakage

Updated October 7, 2026
Dirty water pouring from two pipes into a river Statistics

Water companies in England ranked by pollution incidents

Updated October 7, 2026
A sign by the water warning of possible sewage overflows during and after heavy rain Statistics

Water companies in England ranked by sewage spills

Updated October 7, 2026
A concrete dam holding back a reservoir in a deep rocky gorge Statistics

Water statistics 2026

Updated October 5, 2026