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Polluted by sewage 418 times in 2025 lasting 2,658 hours
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Donate NowHere are all the reported sewage overflow totals for Wilmslow 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 Dean | WILMSLOW STW | 122 | 926 | 99.75 |
| United Utilities | Whitehall Brook | ALDERLEY EDGE WWTW ALDYE | 91 | 908 | 100 |
| United Utilities | Carr Brook | ALDERLEY EDGE WWTW CSO | 60 | 479 | 100 |
| United Utilities | River Bollin | CHANCEL LANE CSO 271I4 | 45 | 94 | 100 |
| United Utilities | Whitehall Brook Via Sws | FULSHAW CROSS CSO 271U4 | 37 | 68 | 91.3 |
| United Utilities | River Bollin | QUARRY BANK MILL CSO 272M4 | 15 | 61 | 99.3 |
| United Utilities | River Dean | REEMAN COURT MANHOLE H4 CSO 272NY | 9 | 47 | 99.5 |
| 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 | Clvrt'D River Bollin | HAWTHORN LANE CSO | 9 | 5 | 99.5 |
| United Utilities | River Dean | DEAN ROAD CSO 278A2 | 2 | 1 | 99.6 |
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
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