Media Queries
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org
Please Support Us
We rely on donations to fund our work. Please support us if you can
Polluted by sewage 309 hours in 2025 , monitoring offline 2,610 hours , potential overflows 28 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.
Your local MP is Paula Barker (Labour) - Find out more about their interests, donors, and voting at They Work For You
Please consider a one-off or small recurring donation. We need your help to keep this site going.
Donate Now| Company | Site Name | Receiving Waterway | Overflow Days | Total Duration (hours) | Offline/Potential Pollution |
|---|---|---|---|---|---|
| United Utilities | Southern Relief CSO | Mersey Estuary | 36 | 127h 50m | 0 h |
| United Utilities | Dingle CSO | Mersey Estuary | 29 | 56h 52m | - |
| United Utilities | Southern Relief CSO | Mersey Estuary | 10 | 30h 3m | - |
| United Utilities | Mersey Road CSO | Mersey Estuary | 10 | 20h 51m | - |
| United Utilities | Jericho Lane CSO | Mersey Estuary | 5 | 18h 53m | 5 h |
| United Utilities | Windbourne CSO | River Mersey Estuary | 7 | 17h 37m | 9 h |
| United Utilities | Grassendale CSO | Mersey Estuary | 7 | 15h 21m | 1,123 h |
| United Utilities | Dingle CSO | Mersey Estuary | 8 | 9h 59m | - |
| United Utilities | Fulwood CSO | River Mersey Estuary | 6 | 5h 12m | 1,499 h |
| United Utilities | Mersey Road CSO | Mersey Estuary | 1 | 2h 34m | - |
| United Utilities | Windbourne CSO | River Mersey Estuary | 2 | 2h 17m | - |
| United Utilities | Grassendale CSO | Mersey Estuary | 1 | 1h 39m | - |
| United Utilities | Jericho Lane CSO | Mersey Estuary | 0 | 0h | - |
| United Utilities | Fulwood CSO | River Mersey Estuary | 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
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