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Polluted by sewage 753 times in 2024 lasting 2,238 hours
So far this year (as of May 29, 2025, 2:00 AM) there has been 1,166 hours of sewage overflows
Your local MP is Connor Rand (Labour) - Find out more about their interests, donors, and voting at They Work For You
We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Altrincham and Sale West, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.
Each CSO has a row, the most recent data is on the right hand side.
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Donate NowHere are all the reported sewage overflow totals for Altrincham and Sale West in 2024. 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 constituency all the declared CSOs appeared to have monitoring enabled for more than 50% of the year
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| United Utilities | River Bollin | PARK ROAD ARTHOG ROAD CSO 452LS | 128 | 488 | 98.7 |
| United Utilities | Sinderland Brook | ALTRINCHAM STW | 90 | 481 | 100 |
| United Utilities | River Bollin | POOL BANK FARM BOWDON CSO 452L6 | 89 | 353 | 95.4 |
| United Utilities | River Bollin | DUNHAM MASSEY STW | 60 | 238 | 100 |
| United Utilities | River Bollin Via Sws | DUNHAM MASSEY OUTFALL CSO (451SS) | 47 | 176 | 99.4 |
| United Utilities | Timperley Brook | GOLF ROAD PUMPING STATION | 50 | 105 | 100 |
| United Utilities | River Bollin | BARROW LANE CSO (451G7) | 57 | 85 | 99.1 |
| United Utilities | Timperley Brook | BROOK CLOSE CSO | 24 | 70 | 100 |
| United Utilities | Stromford Brook Via Sws | MANOR AVENUE CSO (45056) | 58 | 63 | 97 |
| United Utilities | Timperley Brook | OAKFIELD ST COMBINED SEWER OVERFLOW | 40 | 48 | 99.9 |
| United Utilities | Stromford Brk Rvr Mersey | THE AVENUE SYPHON CSO 452UO | 26 | 42 | 98.9 |
| United Utilities | Timperley Brook | STAMFORD NEW ROAD CSO | 38 | 34 | 100 |
| United Utilities | Manchester Ship Canal | PARKGATE FARM (WARBURTON) CSO | 28 | 28 | 98.5 |
| United Utilities | Sinderland Brook | ALTRINHAM WWTW HIGH LEVEL OVERFLOW | 9 | 10 | 99.3 |
| United Utilities | Stromford Brook | MANOR AVENUE/FIRS ROAD CSO | 6 | 8 | 98.7 |
| United Utilities | Timperley Brook | BALFOUR ROAD CSO | 1 | 0 | 99.5 |
| United Utilities | Timperley Brook | HAWTHORN ROAD CSO 451YJ | 1 | 0 | 98.8 |
| United Utilities | River Bollin | CHAPEL LANE | 1 | 0 | 94 |
| United Utilities | River Bollin Via Sws | CECIL ROAD/ASHLEY ROAD CSO | 0 | 0 | 99.2 |
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. This 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