Polluted by sewage 4,490 hours in 2025
Your local MP is Justin Madders (Labour) - Find out more about their interests, donors, and voting at They Work For You
We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Ellesmere Port and Bromborough, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.
Each CSO has a row, the most recent data is on the right hand side.
We managed to raise ยฃ150 in 2024. That's not enough to keep the site running. Please consider a one-off or small recurring donation.
Donate Now| Company | Site Name | Receiving Waterway | Overflow Days | Total Duration (hours) | Total Duration (days) |
|---|---|---|---|---|---|
| United Utilities | BROMBOROUGH WwTW | River Mersey Estuary | 90 | 1,028 h 18m | 42.83 |
| United Utilities | Dock Road South PS, Bromborough | River Mersey Estuary | 68 | 562 h 4m | 23.42 |
| United Utilities | BROMBOROUGH WwTW | River Mersey Estuary | 76 | 540 h 12m | 22.5 |
| United Utilities | BROMBOROUGH WwTW | River Mersey Estuary | 27 | 396 h 43m | 16.5 |
| United Utilities | Mayfield Drive PS1 CSO (512EZ) | River Mersey Estuary | 68 | 347 h 41m | 14.46 |
| United Utilities | Rivacre Valley Park CSO | Rivacre Brook | 51 | 335 h 17m | 13.96 |
| United Utilities | Dock Road South PS, Bromborough | River Mersey Estuary | 23 | 233 h 52m | 9.71 |
| United Utilities | Dock Road South | Mersey Estuary | 35 | 189 h 11m | 7.88 |
| United Utilities | BROMBOROUGH WwTW | River Mersey Estuary | 19 | 174 h 10m | 7.25 |
| United Utilities | The Dell CSO | Mersey Estuary | 36 | 131 h 23m | 5.46 |
| United Utilities | Power House Road PS | Manchester Ship Canal | 31 | 126 h 5m | 5.25 |
| United Utilities | Rivacre Valley Park CSO (182OG) (ELL0010) | Rivacre Brook | 12 | 74 h 24m | 3.08 |
| United Utilities | Mayfield Drive PS1 CSO (512EZ) | River Mersey Estuary | 14 | 61 h 37m | 2.54 |
| United Utilities | Dock Road South | Mersey Estuary | 13 | 58 h 10m | 2.42 |
| United Utilities | Eastham Rake Combined Sewer Overflow (Site ID 51068) (WIR0111) | Dibbinsdale Brook | 9 | 48 h 42m | 2 |
| United Utilities | Little Stanney SO | Stanney Brook | 8 | 38 h 20m | 1.58 |
| United Utilities | Rivacre Valley Park CSO (182OG) (ELL0010) | Rivacre Brook | 7 | 24 h 54m | 1 |
| United Utilities | The Dell CSO | Mersey Estuary | 12 | 24 h 16m | 1 |
| United Utilities | Eastham Village CSO | Mersey Estuary | 20 | 23 h 54m | 0.96 |
| United Utilities | Thermal Road Port, Causeway | Mersey Estuary | 15 | 20 h 32m | 0.83 |
| United Utilities | Rivacre Valley Park CSO | Rivacre Brook | 12 | 18 h 28m | 0.75 |
| United Utilities | Power House Road PS | Manchester Ship Canal | 6 | 16 h 56m | 0.67 |
| United Utilities | Eastham Village CSO | Mersey Estuary | 4 | 4 h 6m | 0.17 |
| United Utilities | Bromborough Pool Village PS | Mersey Estuary | 2 | 3 h 59m | 0.12 |
| United Utilities | Rear of Valley Drive CSO | Rivacre Brook | 3 | 3 h 16m | 0.12 |
| United Utilities | Eastham Rake Combined Sewer Overflow (Site ID 51068) (WIR0111) | Dibbinsdale Brook | 1 | 2 h 49m | 0.08 |
| United Utilities | Thermal Road Port, Causeway | Mersey Estuary | 2 | 1 h 6m | 0.04 |
| United Utilities | Mayfield Drive Ww Ntwk PS | River Mersey | 0 | 0 h | 0 |
| United Utilities | Rear of Valley Drive CSO | Rivacre Brook | 0 | 0 h | 0 |
| United Utilities | No 3 Park Road CSO | Manchester Ship Canal | 0 | 0 h | 0 |
| United Utilities | No 3 Park Road CSO | Manchester Ship Canal | 0 | 0 h | 0 |
| United Utilities | Mayfield Drive Ww Ntwk PS | River Mersey | 0 | 0 h | 0 |
| United Utilities | Bromborough Pool Village PS | Mersey Estuary | 0 | 0 h | 0 |
| United Utilities | Little Stanney SO | Stanney Brook | 0 | 0 h | 0 |
| United Utilities | Port Causeway/Crossway CSO | Bromborough Pool | 0 | 0 h | 0 |
| United Utilities | Port Causeway/Crossway CSO | Bromborough Pool | 0 | 0 h | 0 |
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.