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Polluted by sewage 2,798 hours in 2025
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We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Southport, 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.
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Donate Now| Company | Site Name | Receiving Waterway | Overflow Days | Total Duration (hours) | Total Duration (days) |
|---|---|---|---|---|---|
| United Utilities | MERE BROW WwTW | Tarleton Runner | 92 | 1,158 h 35m | 48.25 |
| United Utilities | MERE BROW WwTW | Tarleton Runner | 32 | 422 h 4m | 17.58 |
| United Utilities | Liverpool Road PS (49039) | River Douglas | 26 | 386 h 26m | 16.08 |
| United Utilities | HESKETH BANK WwTW | Douglas Estuary | 15 | 220 h 51m | 9.17 |
| United Utilities | MERE BROW WwTW | Tarleton Runner | 16 | 133 h 43m | 5.54 |
| United Utilities | Crowland Street PS | Three Pools Waterway | 17 | 109 h 54m | 4.54 |
| United Utilities | O/S 119 Rufford Road CSO | Three Pools Waterway | 23 | 80 h 6m | 3.33 |
| United Utilities | SOUTHPORT WwTW | Crossens Pool | 12 | 71 h 45m | 2.96 |
| United Utilities | SOUTHPORT WwTW | Crossens Pool | 11 | 55 h 2m | 2.29 |
| United Utilities | Shore Road Wastewater Network PS(Site ID 49065) (WLN0008) | Dunkirk Dib | 23 | 43 h 36m | 1.79 |
| United Utilities | Balmoral Drive/North Road CSO | River Ribble | 6 | 26 h 26m | 1.08 |
| United Utilities | The Crescent CSO (383KE) | Three Pool'S Waterway | 7 | 24 h 43m | 1 |
| United Utilities | Liverpool Road PS (49039) | River Douglas | 8 | 22 h 25m | 0.92 |
| United Utilities | O/S 119 Rufford Road CSO | Three Pools Waterway | 8 | 13 h 10m | 0.54 |
| United Utilities | Shore Road Wastewater Network PS(Site ID 49065) (WLN0008) | Dunkirk Dib | 7 | 11 h 48m | 0.46 |
| United Utilities | Crowland Street PS | Three Pools Waterway | 2 | 5 h 3m | 0.21 |
| United Utilities | HESKETH LANE CSO | River Douglas | 9 | 4 h 50m | 0.17 |
| United Utilities | MERE BROW WwTW | Tarleton Runner | 1 | 3 h 56m | 0.12 |
| United Utilities | Janes Brook Road PS | Fine Jane'S Brook | 4 | 2 h 44m | 0.08 |
| United Utilities | Weld Road CSO | Irish Sea | 2 | 0 h 37m | 0 |
| United Utilities | Weld Road CSO | Irish Sea | 1 | 0 h 35m | 0 |
| United Utilities | HESKETH LANE CSO | River Douglas | 1 | 0 h 26m | 0 |
| United Utilities | Balmoral Drive/North Road CSO | River Ribble | 0 | 0 h | 0 |
| United Utilities | HESKETH BANK WwTW | Douglas Estuary | 0 | 0 h | 0 |
| United Utilities | Janes Brook Road PS | Fine Jane'S Brook | 0 | 0 h | 0 |
| United Utilities | The Crescent CSO (383KE) | Three Pool'S Waterway | 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.
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org