Media Queries
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Here are all the reported sewage overflow totals for Mersey Estuary in 2025. Sometimes sewage can be being dumped for months at a time.
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| United Utilities | Mersey Estuary | WARRINGTON NORTH WWTW | 68 | 560 | 99.95 |
| United Utilities | Mersey Estuary | MERSEY VIEW ROAD CSO | 44 | 222 | 99.8 |
| United Utilities | Mersey Estuary | SOUTHERN RELIEF CSO | 46 | 159 | 100 |
| United Utilities | Mersey Estuary | THE DELL COMBINED SEWER OVERFLOW | 50 | 157 | 100 |
| United Utilities | Mersey Estuary | ST ANDREWS ROAD/ST MICHAEL CSO | 58 | 154 | 92.8 |
| United Utilities | Mersey Estuary | DINGLE COMBINED SEWER OVERFLOW | 39 | 68 | 100 |
| United Utilities | Mersey Estuary | GARSTON CSO LIVERPOOL | 23 | 62 | 100 |
| United Utilities | Mersey Estuary | WOODSIDE CSO | 14 | 60 | 100 |
| United Utilities | Mersey Estuary | WALLACRE ROAD CSO | 31 | 56 | 100 |
| United Utilities | Mersey Estuary | BANKHALL RELIEF CSO 99005 | 20 | 39 | 100 |
| United Utilities | Mersey Estuary | EASTHAM VILLAGE CSO | 25 | 29 | 99.8 |
| United Utilities | Mersey Estuary | ST PAUL'S ROAD CSO | 31 | 29 | 98.8 |
| United Utilities | Mersey Estuary | MERSEY ROAD COMBINED SEWER OVERFLOW | 12 | 23 | 100 |
| United Utilities | Mersey Estuary | THERMAL ROAD/PORT CAUSEWAY CSO | 22 | 23 | 99.8 |
| United Utilities | Mersey Estuary | JERICHO LANE CSO | 6 | 19 | 100 |
| United Utilities | Mersey Estuary | GRASSENDALE COMBINED SEWER OVERFLOW | 10 | 16 | 100 |
| United Utilities | Mersey Estuary | ST NICHOLAS STORM SEWER OVERFLOW | 7 | 3 | 100 |
| United Utilities | Mersey Estuary | BROMBOROUGH POOL VILLAGE PS 51026 | 1 | 1 | 100 |
| United Utilities | Mersey Estuary | SANDHILLS LANE CSO | 3 | 1 | 100 |
| United Utilities | Mersey Estuary | GOWER ST/KINGS DOCK CSO | 4 | 0 | 100 |
| United Utilities | Mersey Estuary | BATTERY LANE CSO | 2 | 0 | 100 |
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.
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org