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Polluted by sewage 30 times in 2025 lasting 261 hours
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Donate NowHere are all the reported sewage overflow totals for Richmond upon Thames 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 % |
|---|---|---|---|---|---|
| Thames Water | River Thames Tidal | MOGDEN WWTW | 17 | 202 | 100 |
| Thames Water | Tidal Thames | West Putney S R, Home Way | 3 | 36 | 99.8 |
| Thames Water | River Thames | HAMMERSMITH PS, LONDON | 2 | 9 | 86.4 |
| Thames Water | Beverley Brook | PRIORY LANE, MORTLAKE CSO | 3 | 7 | 87.8 |
| Thames Water | River Thames | STAMFORD BROOK, HAMMERSMITH, LONDON | 1 | 3 | 100 |
| Thames Water | Hogsmill River | CSO AT ST JAMES'S ROAD | 2 | 1 | 100 |
| Thames Water | River Thames | NW. RELIEF SEWER, LOWER MALL, LONDO | 1 | 0 | 99.8 |
| Thames Water | River Thames | LOW LEVEL 1, LOWER MALL, LONDON | 1 | 0 | 100 |
| Thames Water | Thames | Kingston Main | 0 | 0 | 100 |
| Thames Water | Tidal River Thames | KEW PS, WEST HALL ROAD, KEW | 0 | 0 | 76.7 |
| Thames Water | Tidal Thames | Anyand Park Road, Twickenham | 0 | 0 | 100 |
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.
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