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Polluted by sewage 961 times in 2025 lasting 5,561 hours
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Donate NowHere are all the reported sewage overflow totals for Birkenhead in 2025. Sometimes sewage can be being dumped for months at a time.
Reporting refers to how much of the time the monitoring was active. In this place all the declared CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s appeared to have monitoring enabled for more than 50% of the year
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| United Utilities | River Mersey Estuary | BROMBOROUGH WWTW | 216 | 2,092 | 99.95 |
| United Utilities | River Mersey Estuary/River Birket | BIRKENHEAD WWTW BIRKE | 146 | 1,498 | 100 |
| United Utilities | River Mersey Estuary | WALLASEY WW PUMPING STATION | 212 | 907 | 99.97 |
| United Utilities | River Fender | REAR OF 25 WHEATFIELD CLOSE CSO | 47 | 258 | 98 |
| United Utilities | Mersey Estuary | THE DELL COMBINED SEWER OVERFLOW | 50 | 157 | 100 |
| United Utilities | Arrowe Brook River Birket | ARROWEBROOK LANE CSO | 36 | 128 | 98.7 |
| United Utilities | River Fender | NOCTORUM AVENUE CSO 512IB | 58 | 95 | 99.9 |
| United Utilities | River Fender | HOYLAKE ROAD/CHAPELHILL CSO | 26 | 93 | 89.4 |
| United Utilities | Mersey Estuary | WOODSIDE CSO | 14 | 60 | 100 |
| United Utilities | River Birkett | BIDSTON BY-PASS CSO | 13 | 47 | 72.4 |
| United Utilities | River Fender | UPTON ROAD CSO 513N8 | 28 | 42 | 98.8 |
| United Utilities | Arrowe Brook | SAUGHALL MASSIE RD/DEVONSHIRE RDCSO | 12 | 38 | 98.4 |
| United Utilities | Arrowe Brook | OUTSIDE 81 WODLANE CSO 513OI | 24 | 37 | 99.6 |
| United Utilities | Mersey Estuary | ST PAUL'S ROAD CSO | 31 | 29 | 98.8 |
| United Utilities | Arrowe Brook | GREASBY ROAD/CORTSWAY CSO 511WQ | 7 | 23 | 100 |
| United Utilities | Arrowe Brook | 389 HOYLAKE ROAD CSO | 6 | 18 | 99.8 |
| United Utilities | Arrowe Brook | 97 WOOD LANE CSO | 15 | 12 | 82.6 |
| United Utilities | Arrowe Brook | GARRICK AVENUE CSO | 3 | 5 | 99.4 |
| United Utilities | Arrowe Brook | ACTON LANE COMBINED SEWER OVERFLOW | 3 | 5 | 90.4 |
| United Utilities | River Fender | BRISCOE DRIVE CSO 511G9 | 7 | 4 | 100 |
| United Utilities | Bidston Stream | STATION RD COMBINED SEWER OVERFLOW | 6 | 3 | 99.4 |
| United Utilities | Arrowe Brook | KINGFISHER WAY CSO | 1 | 0 | 100 |
| United Utilities | Arrowe Brook River Birkett | WOOD LANE/GLENTREE CLOSE CSO | 0 | 0 | 72.6 |
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
Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.
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.
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org