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Polluted by sewage 227 times in 2025 lasting 256 hours
Monitoring was disabled in some locations, so could be more
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Donate NowHere are all the reported sewage overflow totals for Colchester 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 1 of the total 17 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway locations had reporting enabled for less than half the year. Of these 1 had zero reporting.
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| Anglian Water | Colne Estuary | COLCHESTER WATER RECYCLING CENTRE | 28 | 73 | 99.3 |
| Anglian Water | Unknown | SPORTS CENTRE MILL RD. | 72 | 69 | 99.57 |
| Anglian Water | Tendring Streams | SPORTS CENTRE MILL RD. | 49 | 36 | 82.03 |
| Anglian Water | Holland Brook | COLCHESTER ST ALBANS ROAD CSO | 19 | 16 | 99.9 |
| Anglian Water | Roman River | LAYER DE-LA-HAYE STW | 3 | 14 | 100 |
| Anglian Water | Bourne Brook | COLCHESTER-BOURNE MILL CSO | 21 | 12 | 100 |
| Anglian Water | Tidal River Colne | COLCHESTER-HAVEN ROAD CSO | 6 | 12 | 100 |
| Anglian Water | Horkesley Black Brook | IVY LODGE SPS | 2 | 11 | 100 |
| Anglian Water | River Colne | COLCHESTER-EAST BR (EAST) CSO OV | 12 | 5 | 99.5 |
| Anglian Water | River Colne | HYTHE BRIDGE | 9 | 2 | 96.1 |
| Anglian Water | Tidal River Colne | COLCHESTER HUNTING GATE CSO | 3 | 0 | 100 |
| Anglian Water | Tendring Stream | SPORTS CENTRE MILL RD. | 2 | 0 | 99.85 |
| Anglian Water | Salary Brook | COLCHESTER - SHEARWATER MEWS CSO | 1 | 0 | 99.8 |
| Anglian Water | River Colne | COLCHESTER-EAST BAY MAIN INT CSO | 0 | 0 | 100 |
| Anglian Water | River Colne | COLCHESTER-SPRING LANE CSO | 0 | 0 | 99.9 |
| Anglian Water | River Colne | EIGHT ASH GREEN - HEATHFIELDS SPS | 0 | 0 | 100 |
| Anglian Water | River Colne | WEST BERGHOLT STW | 0 | 0 | 0 |
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