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 570 hours in 2026 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.
Your local MP is Alison McGovern (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 | BIRKENHEAD WwTW | River Mersey Estuary/River Birket | 42 | 445h | - |
| United Utilities | Bidston Bypass CSO | River Birkett | 18 | 70h 54m | - |
| United Utilities | BIRKENHEAD WWTW | River Mersey Estuary/River Birket | 14 | 40h 1m | - |
| United Utilities | St Pauls Road CSO | River Ribble Estuary | 16 | 11h 6m | - |
| United Utilities | Woodside CSO | Mersey Estuary | 5 | 2h 58m | - |
| United Utilities | Noctorum Avenue CSO | River Fender | 2 | 0h 30m | - |
| United Utilities | BIRKENHEAD WWTW | River Mersey Estuary/River Birket | 0 | 0h | - |
| United Utilities | Noctorum Avenue CSO | River Fender | 0 | 0h | - |
| United Utilities | Pool Lane CSO (512L8) | Fender | 0 | 0h | - |
| United Utilities | BIRKENHEAD WWTW | River Mersey Estuary/River Birket | 0 | 0h | - |
| United Utilities | Woodside CSO | Mersey Estuary | 0 | 0h | - |
| United Utilities | Stanton Road PS | Boardman Brook | 0 | 0h | - |
| United Utilities | BIRKENHEAD WwTW | River Mersey Estuary/River Birket | 0 | 0h | - |
| United Utilities | Bidston Bypass CSO | River Birkett | 0 | 0h | - |
| United Utilities | Stanton Road PS | Boardman Brook | 0 | 0h | - |
| United Utilities | BIRKENHEAD WWTW | River Mersey Estuary/River Birket | 0 | 0h | - |
| United Utilities | Pool Lane CSO (512L8) | Fender | 0 | 0h | - |
| United Utilities | St Pauls Road CSO | River Ribble 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