GBTT

Sewage Check

How many times did your water company dump raw sewage near you? 14,275 outfalls monitored. Every spill counted. Every hour logged.

We'll find the nearest sewage outfalls and show you how often they discharged in 2024.
450,089
Total spills in 2024
3.6m
Hours of raw sewage
£10.5m
CEO pay (2024-25)

All companies ranked — worst first

Company
Outfalls
Spills
Hours

Looting The System

Customers are paying more while companies leak treated drinking water, dump raw sewage and still hand out large executive pay packages. This is what extraction looks like in the water industry: households fund the system, but too much of the money vanishes into failure instead of service.

2.5bn
Litres of clean water leaked every day
Across these ten companies, Ofwat data shows roughly 2.5 billion litres a day lost through leakage.
450,089
Raw sewage spills in 2024
That is how many times monitored storm overflows discharged into waterways in a single year.
£10.5m
CEO pay in 2024-25
Even after bonus scrutiny, senior executives still took millions out of a failing system.
Company
Bill
Leaks
Spills
CEO Pay
Verdict

The Ghost Population

Water companies plan their infrastructure for 62.3 million people in England. The ONS says 57.1 million live here. That's a gap of 5.2 million — and it's the water industry's own planning figure, not ours.

The GP register shows a remarkably similar gap — 4.9 million more patients registered than the ONS says exist. Two completely independent systems. Two different government datasets. Same answer: roughly five million more people in England than the official count.

62.3m
Water company planning population
From WRMP24 Supply-Demand Data, published by Defra. This is how many people water companies plan to serve.
57.1m
ONS official population estimate
The government's official count of how many people live in England. Used for all public service planning.
5.2m
The gap
Five million more people using the water system than the government says are here. The GP register shows a 4.9 million gap. Same story, different pipe.
Water company
WRMP pop
Water/day
Implied pop
Gap
Note

Caveat: The WRMP population is what water companies use for infrastructure planning, not a census. It includes their own growth forecasts and may overlap at boundaries. Some companies serve parts of Wales. The gap cannot be entirely attributed to uncounted population — but it is consistent with the GP register gap, the NI number discrepancies, and Policy Exchange's call for an emergency census. Two independent infrastructure systems both suggest roughly the same number of unplanned-for people.

Methodology

Sewage data: Environment Agency Event Duration Monitoring (EDM) 2024 Storm Overflow Annual Return. Published March 2025. All 10 water and sewerage companies in England.

Location: Grid references from EA permits converted to lat/lon. Distance calculated from postcode centre. Nearest outfalls shown within 5km.

CEO pay: Verified against latest company annual reports for 2024-25 and Ofwat executive pay rulings. Where Ofwat blocked bonuses, figure reflects latest verifiable amount.

Leaks: Ofwat Water Company Performance Report 2024-25. Figures shown are each company's reported 2024-25 leakage performance on Ofwat's three-year average basis, converted to approximate Ml/day from the published baseline and percentage change.

Spill count: "Counted spills using 12-24h count method" — the standard EA metric.

What this doesn't show: Permitted discharges from treatment works (legal), combined sewer overflows during extreme rainfall (may be unavoidable), or volume of discharge (EDM measures duration, not volume).