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Polluted by sewage 2,789 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 St Helens North, 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 | West End Wharf Road CSO | Sankey Brook | 20 | 420 h 50m | 17.5 |
| United Utilities | Lodge Lane (Near Ellams Brook) CSO | Dean Dam | 17 | 399 h 42m | 16.62 |
| United Utilities | St Helens Wastewater Treatment Works (Site STHEL) (016920130) | Sankey Brook | 31 | 347 h 32m | 14.46 |
| United Utilities | BILLINGE SOUTH PUMPING STATION | Black Brook | 16 | 163 h 35m | 6.79 |
| United Utilities | Folds Road CSO | Black Brook | 55 | 161 h 33m | 6.71 |
| United Utilities | St Helens Wastewater Treatment Works (Site STHEL) (016920130) | Sankey Brook | 14 | 157 h 43m | 6.54 |
| United Utilities | Red Brow Wood CSO | Sankey Canal | 32 | 125 h 43m | 5.21 |
| United Utilities | 10 Warwick Avenue CSO | Newton Brook | 31 | 113 h 15m | 4.71 |
| United Utilities | Wharf Road CSO | Sankey Brook | 38 | 102 h 43m | 4.25 |
| United Utilities | Lodge Lane (Near Ellams Brook) CSO | Dean Dam | 13 | 80 h 17m | 3.33 |
| United Utilities | St Helens Wastewater Treatment Works (Site STHEL) (016920130) | Sankey Brook | 17 | 79 h 11m | 3.29 |
| United Utilities | West End Wharf Road CSO | Sankey Brook | 15 | 65 h 52m | 2.71 |
| United Utilities | BILLINGE SOUTH PUMPING STATION | Black Brook | 6 | 65 h 51m | 2.71 |
| United Utilities | Carr Mill Road CSO | Black Brook Via Sws | 22 | 58 h 19m | 2.42 |
| United Utilities | Washway Lane CSO | Rainford Brook | 26 | 53 h 44m | 2.21 |
| United Utilities | Malvern Road (St.Helens) CSO | Sankey Brook | 18 | 52 h 59m | 2.17 |
| United Utilities | Folds Road CSO | Black Brook | 14 | 50 h 27m | 2.08 |
| United Utilities | Red Brow Wood CSO | Sankey Canal | 7 | 47 h 56m | 1.96 |
| United Utilities | Berrys Lane | Sutton Brook Via Sws | 12 | 40 h 18m | 1.67 |
| United Utilities | Vicarage Road CSO | Clipsley Brook | 5 | 34 h 36m | 1.42 |
| United Utilities | 10 Warwick Avenue CSO | Newton Brook | 7 | 33 h 44m | 1.38 |
| United Utilities | Wharf Road CSO | Sankey Brook | 8 | 30 h 10m | 1.25 |
| United Utilities | Rudd Avenue SSO | Sankey Brook | 7 | 27 h 51m | 1.12 |
| United Utilities | St Helens Wastewater Treatment Works (Site STHEL) (016920130) | Sankey Brook | 7 | 18 h 10m | 0.75 |
| United Utilities | Penkford Bridge | Sankey Brook | 8 | 14 h 6m | 0.58 |
| United Utilities | Malvern Road (St.Helens) CSO | Sankey Brook | 6 | 13 h 2m | 0.54 |
| United Utilities | Carr Mill Road CSO | Black Brook Via Sws | 6 | 12 h 10m | 0.5 |
| United Utilities | Washway Lane CSO | Rainford Brook | 8 | 10 h 22m | 0.42 |
| United Utilities | Berrys Lane | Sutton Brook Via Sws | 2 | 5 h 20m | 0.21 |
| United Utilities | Penkford Bridge | Sankey Brook | 3 | 1 h 12m | 0.04 |
| United Utilities | Wargrave Road CSO | Newton Brook | 2 | 0 h 22m | 0 |
| United Utilities | Grange Valley | Freshwater Stteam | 2 | 0 h 18m | 0 |
| United Utilities | Troutbeck Road CSO | Millingford Brook | 1 | 0 h 14m | 0 |
| United Utilities | BILLINGE SOUTH PUMPING STATION | Black Brook | 0 | 0 h | 0 |
| United Utilities | Grange Valley | Freshwater Stteam | 0 | 0 h | 0 |
| United Utilities | Gloucester Street CSO | Sankey Brook | 0 | 0 h | 0 |
| United Utilities | BILLINGE SOUTH PUMPING STATION | Black Brook | 0 | 0 h | 0 |
| United Utilities | Wargrave Road CSO | Newton Brook | 0 | 0 h | 0 |
| United Utilities | Rudd Avenue SSO | Sankey Brook | 0 | 0 h | 0 |
| United Utilities | Vicarage Road CSO | Clipsley Brook | 0 | 0 h | 0 |
| United Utilities | Troutbeck Road CSO | Millingford Brook | 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