Polluted by sewage 435 hours in 2026 , monitoring offline 19 hours , potential overflows 61 hours so far..
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 |
|---|---|---|---|---|---|
| United Utilities | Anchorsholme PS | Irish Sea | 25 | 267h 57m | 1 h |
| United Utilities | Rossall School PS | Unnamed Dyke | 8 | 80h 46m | 24 h |
| United Utilities | Trunnah Road PS | Royals Brook | 10 | 46h 23m | - |
| United Utilities | Chatsworth Avenue PS | Irish Sea | 13 | 37h 20m | 36 h |
| United Utilities | Dock Street Combined Sewer Overflow (Site ID 52567) (WYR0080) | Copse Brook Culvert | 3 | 2h 5m | - |
| United Utilities | South Strand CSO (52514) | Culverted Section Of Copse Brook Via A Surface Water Sewer | 1 | 0h 36m | 17 h |
| United Utilities | Dock Street CSO | Copse Brook Culvert | 2 | 0h 4m | - |
| United Utilities | Rossall School PS | Unnamed Dyke | 0 | 0h | - |
| United Utilities | South Strand CSO (52514) | Culverted Section Of Copse Brook Via A Surface Water Sewer | 0 | 0h | - |
| United Utilities | Chatsworth Avenue PS | Irish Sea | 0 | 0h | - |
| United Utilities | Trunnah Road PS | Royals Brook | 0 | 0h | - |
| United Utilities | Dock Street CSO | Copse Brook Culvert | 0 | 0h | - |
| United Utilities | Dock Street Combined Sewer Overflow (Site ID 52567) (WYR0080) | Copse Brook Culvert | 0 | 0h | - |
| United Utilities | Anchorsholme PS | Irish Sea | 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.