Polluted by sewage 168 hours in 2025 , potential overflows 412 hours
What's a potential overflow? If the CSO goes 'Offline' while its Overflowing, we don't know if it stopped overflowing until we get a 'Stop' event.
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Donate Now| Company | Site Name | Receiving Waterway | Overflow Days | Total Duration (hours) | Offline/Potential Pollution |
|---|---|---|---|---|---|
| Anglian Water | BILLERICAY STW | River Crouch | 14 | 41h 4m | - |
| Anglian Water | BILLERICAY EAST-OUTWOOD COMM | Outwood Common R Crouch | 10 | 38h 49m | 412 h |
| Anglian Water | WICKFORD-WOOLSHOTS A and B SP | River Crouch | 3 | 37h 59m | - |
| Anglian Water | BILLERICAY STW | River Crouch | 3 | 25h 34m | - |
| Anglian Water | BARLEYLAND SO | Upper River Crouch | 8 | 14h 54m | - |
| Anglian Water | BILLERICAY-ST AGNES RD SP | River Crouch | 2 | 9h 15m | - |
| Anglian Water | BURSTEAD-NOAK BRIDGE SO | Upper River Crouch | 1 | 0h 15m | - |
| Anglian Water | BILLERICAY EAST-OUTWOOD COMM | Outwood Common R Crouch | 1 | 0h 15m | - |
| Anglian Water | BILLERICAY STW | River Crouch | 0 | 0h | - |
| Anglian Water | WICKFORD-WOOLSHOTS A and B SP | River Crouch | 0 | 0h | - |
| Anglian Water | BILLERICAY STW | River Crouch | 0 | 0h | - |
| Anglian Water | BILLERICAY-ST AGNES RD SP | River Crouch | 0 | 0h | - |
| Anglian Water | BARLEYLAND SO | Upper River Crouch | 0 | 0h | - |
| Anglian Water | BURSTEAD-NOAK BRIDGE SO | Upper River Crouch | 0 | 0h | - |
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.