Thames Water was responsible for more than half a billion litres of leakage a day in 2023-24

Ten worst companies by average daily leakage 2023-24, millions of litres

LEAKAGE (in megalitres per day)

0ML

100

200

300

400

500

Thames Water 570.4

United Utilities 408.6

Severn Trent 380.7

Yorkshire Water 260

Welsh Water 249

Anglian Water 182.1

Affinity Water 153.5

Northumbrian Water 123.1

South West Water 118.5

Southern Water 107.5