It's a Dirty Business

Watch Channel 4's documentary about the state of the water industry, then sign the petition to bring water back to public ownership.

River Allen polluted by sewage 342 times in 2025 - lasting 3,096 hours

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024
Totals for River Allen in 2025
7 Sites polluted by South West Water
342 sewage dumps
3,096 h duration
That's 4.3 months. 6.6 times a week, on average
Constituencies along River Allen
Places along River Allen

Pollution Summary 2025

Here are all the reported sewage overflow totals for River Allen in 2025. Sometimes sewage can be being dumped for months at a time.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
South West Water River Allen DELABOLE WASTEWATER TREATMENT WORKS 159 2,910 99.4
South West Water River Allen ST TEATH WASTEWATER TREATMENT WORKS 101 101 97.6
South West Water River Allen TRELANDER HIGHWAY CSO 46 32 100
South West Water River Allen ST MABYN WWTW 7 30 99.1
South West Water River Allen OLD BRIDGE STREET CAR PARK CSO 18 17 100
South West Water River Allen PAULS TERRACE CSO 8 3 94
South West Water River Allen CAMPFIELD HILL CSO 3 1 100

Data Sources & Accuracy

EDM (Event Duration Monitoring) data and Consented Discharges to Controlled Waters with Conditions from Environment Agency & Data Map Wales, and Scottish Water

Experimental derived data from Thames Water API, Some data may be missing or inaccurate. Live sewage data from Stream Water API

Uses Environment Agency rainfall data from the real-time data API (Beta) - Rainfall data is delayed by up to two days.

This website is intended to provide an accurate representation of the Environment Agency data. The data is hard to use, and thus some errors may have been made. If you find something that is incorrect, please raise an issue at the GitHub issues page and we'll endeavour to fix it quickly.

This project is not associated, approved or endorsed by any of the companies whose logos you see here.