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St Helens South and Whiston - 2025 Sewage

Polluted by sewage 335 hours in 2025 , monitoring offline 2,966 hours , potential overflows 41 hours

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2024
© Top of the Poops 2021-2024

Which Year?

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in St Helens South and Whiston for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

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.

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Daily Data

Jan - 112 hours , 12 potential
Feb - 2 hours , 1 offline
Mar - 0 hours , 348 offline
Apr - 0 hours , 721 offline
May - 32 hours , 745 offline
Jun - 7 hours , 369 offline
Jul - 1 hours , 13 potential
Aug - 0 hours , 14 potential
Sept - 88 hours , 1 potential
Oct - 20 hours , 377 offline
Nov - 35 hours , 0 potential
Dec - 32 hours , 0 offline
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
United Utilities Watery Lane CSO Chain Caul Storm Culvert 14 75 h 12m 3 h
United Utilities Sankey Brook (St Helens) CSO Rainford Brook 16 44 h 29m -
United Utilities Gaskell Street CSO Sutton Brook Sankey Brook 26 44 h 6m 467 h
United Utilities St Helens Road CSO Eccleston Mere 21 43 h 34m 5 h
United Utilities Warrington New Road CSO Hardshaw Brook 14 29 h 55m 27 h
United Utilities Jackson Street CSO Hardshaw Brook 12 22 h 20m -
United Utilities Haresfinch Road CSO Rainford Brook 17 20 h 32m 1 h
United Utilities Haresfinch Road CSO Rainford Brook 6 14 h 2m 1 h
United Utilities Gaskell Street CSO Sutton Brook Sankey Brook 6 11 h 58m -
United Utilities Watery Lane CSO Chain Caul Storm Culvert 2 11 h 52m -
United Utilities Warrington New Road CSO Hardshaw Brook 5 7 h 45m 0 h
United Utilities Leach Lane (St. Helens) CSO Sutton Mill Brook 6 3 h 28m 147 h
United Utilities Warrington New Road CSO Hardshaw Brook 4 3 h 2m -
United Utilities St Helens Road CSO Eccleston Mere 5 1 h 44m 0 h
United Utilities Jackson Street CSO Hardshaw Brook 1 0 h 42m 0 h
United Utilities Sankey Brook (St Helens) CSO Rainford Brook 1 0 h 32m -
United Utilities 95 Mill Lane (St.Helens) CSO River Tame 1 0 h 18m 2,352 h
United Utilities 95 Mill Lane (St.Helens) CSO River Tame 0 0 h -
United Utilities Warrington New Road CSO Hardshaw Brook 0 0 h -
United Utilities Cooper Street Hardshaw Brook 0 0 h -
United Utilities Liverpool Road CSO (42062) Hardshaw Brook 0 0 h -
United Utilities Cooper Street Hardshaw Brook 0 0 h -
United Utilities Leach Lane (St. Helens) CSO Sutton Mill Brook 0 0 h -
United Utilities Liverpool Road CSO (42062) Hardshaw Brook 0 0 h -

Data Sources & Accuracy

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.