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Polluted by sewage 929 times in 2025 lasting 1,600 hours
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Donate NowHere are all the reported sewage overflow totals for St Helens (St. Helens) 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 | Sankey Brook | ST HELENS STW | 570 | 601 | 100 |
| United Utilities | Black Brook | BILLINGE SOUTH PS | 25 | 261 | 100 |
| United Utilities | Black Brook | FOLDS ROAD COMBINED SEWER OVERFLOW | 68 | 216 | 99.5 |
| United Utilities | Black Brook Via Sws | CARR MILL ROAD CSO | 35 | 73 | 99.4 |
| United Utilities | Sankey Brook | MALVERN ROAD CSO (42052) | 29 | 66 | 99.8 |
| United Utilities | Sutton Brook Sankey Brook | GASKELL STREET CSO | 38 | 62 | 99.3 |
| United Utilities | Rainford Brook | WASHWAY LANE | 31 | 62 | 99.8 |
| United Utilities | Sutton Brook Via Sws | BERRYS LANE COMBINED SEWER OVERFLOW | 11 | 44 | 97.4 |
| United Utilities | Unknown | VICARAGE ROAD | 5 | 34 | 95.3 |
| United Utilities | Hardshaw Brook | WARRINGTON NEW ROAD (42060) | 18 | 34 | 100 |
| United Utilities | Rainford Brook | HARESFINCH ROAD | 21 | 32 | 97.8 |
| United Utilities | Eccleston Mere | ST HELENS ROAD CSO 422SZ | 35 | 31 | 99.3 |
| United Utilities | Sankey Brook | RUDD AVENUE | 5 | 27 | 99.9 |
| United Utilities | Rainford Brook | SANKEY BROOK (ST HELENS) CSO | 16 | 25 | 100 |
| United Utilities | Hardshaw Brook | JACKSON STREET CSO | 13 | 23 | 99.5 |
| United Utilities | Hardshaw Brook | WARRINGTON NEW ROAD CSO | 6 | 2 | 100 |
| United Utilities | Sutton Mill Brook | LEACH LANE ST HELENS CSO | 1 | 1 | 84.2 |
| United Utilities | Sutton Mill Brook | 95 MILL LANE (ST. HELENS) CSO | 1 | 0 | 71.7 |
| United Utilities | Unknown | CRAB ST/DUKE ST | 1 | 0 | 86.5 |
| United Utilities | Sankey Brook | GLOUCESTER STREET | 0 | 0 | 96.3 |
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.
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Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org