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Here are all the reported sewage overflow totals for River Bollin in 2025. Sometimes sewage can be being dumped for months at a time.
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| United Utilities | River Bollin | HALE STORM TANKS & PUMPING STATION | 129 | 996 | 99.9 |
| United Utilities | River Bollin | BOWDON WASTEWATER TREATMENT WORKS | 61 | 604 | 98.4 |
| United Utilities | River Bollin | MACCLESFIELD WWTW | 56 | 373 | 98.9 |
| United Utilities | River Bollin | POOL BANK FARM BOWDON CSO 452L6 | 71 | 286 | 83.5 |
| United Utilities | River Bollin | DUNHAM MASSEY STW | 43 | 237 | 100 |
| United Utilities | River Bollin | PARK ROAD ARTHOG ROAD CSO 452LS | 74 | 203 | 99.9 |
| United Utilities | River Bollin | CSO AT 18/20 BEECH FARM DRIVE | 66 | 119 | 99.9 |
| United Utilities | River Bollin | WESTMINSTER ROAD CSO | 61 | 95 | 100 |
| United Utilities | River Bollin | CHANCEL LANE CSO 271I4 | 45 | 94 | 100 |
| United Utilities | River Bollin | BARROW LANE CSO (451G7) | 52 | 70 | 96.1 |
| United Utilities | River Bollin | QUARRY BANK MILL CSO 272M4 | 15 | 61 | 99.3 |
| United Utilities | River Bollin | GREEN DRAGON HOTEL CSO 481EC | 19 | 60 | 99.4 |
| United Utilities | River Bollin | HIBEL ROAD CSO 27075 | 18 | 56 | 100 |
| United Utilities | River Bollin | ROEWOODS OUTFALL SEWER | 31 | 42 | 88.1 |
| United Utilities | River Bollin | BOLLIN WALK CSO 27074 | 21 | 41 | 96.4 |
| United Utilities | River Bollin | WILMSLOW PARK SOUTH CSO | 2 | 9 | 99 |
| United Utilities | River Bollin | THE CARRS COMBINED SEWER OVERFLOW | 2 | 8 | 95.2 |
| United Utilities | River Bollin | OPP RIVER ST CSO (273BY) | 3 | 7 | 99.5 |
| United Utilities | River Bollin | CARTMEL CLOSE CSO | 9 | 3 | 100 |
| United Utilities | River Bollin | WATERS GREEN (DAMS VALLEY) CSO | 5 | 1 | 100 |
| United Utilities | River Bollin | CHAPEL LANE | 2 | 0 | 69.8 |
| United Utilities | River Bollin | BEECH BRIDGE SOUTH CSO | 1 | 0 | 99.8 |
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