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Runcorn and Helsby - 2025 Sewage

Polluted by sewage 2,801 hours in 2025 , monitoring offline 6,199 hours , potential overflows 5 hours

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

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Runcorn and Helsby 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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Constituencies near Runcorn and Helsby

Daily Data

Jan - 1,007 hours , 1 potential
Feb - 10 hours , 726 offline
Mar - 5 hours , 1,017 offline
Apr - 11 hours , 740 offline
May - 46 hours , 744 offline
Jun - 35 hours , 721 offline
Jul - 17 hours , 663 offline
Aug - 2 hours , 1 offline
Sept - 256 hours , 2 potential
Oct - 53 hours , 12 offline
Nov - 888 hours , 1 potential
Dec - 466 hours , 0 potential
Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
Please note: We don't have rainfall data for Wales. If you know where to source it please let us know!
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
United Utilities ELLESMERE PORT WwTW Thornton Brook/River Gowy 59 812 h 57m -
United Utilities Mickle Trafford PS Stanney Mill Brook 32 386 h 24m -
United Utilities RUNCORN WwTW M/C Ship Canal 16 174 h 36m 1 h
United Utilities Newtown PS River Weaver 28 171 h 22m -
United Utilities Mickle Trafford PS Stanney Mill Brook 13 164 h 10m -
United Utilities Mickle Trafford PS Stanney Mill Brook 28 150 h 37m 0 h
United Utilities Expressway 8, Runcorn (Weston Point, Point R) CSO Manchester Ship Canal 41 113 h 34m -
United Utilities ELLESMERE PORT WwTW Thornton Brook/River Gowy 16 96 h 58m -
United Utilities Hardwick Street CSO Manchester Ship Canal 28 91 h 4m 0 h
United Utilities Town PS Manchester Ship Canal 7 70 h 15m 5,000 h
United Utilities HELSBY WwTW Hornsmill Brook 6 69 h 30m 4 h
United Utilities Penn Lane (Weston Point, Point R) combined sewer overflow (202LE) (HAL0060) Manchester Ship Canal 40 59 h 54m 24 h
United Utilities Halton Brow CSO Manchester Ship Canal 41 56 h 20m 2 h
United Utilities RUNCORN WwTW M/C Ship Canal 6 43 h 42m -
United Utilities Off Well Lane Kingsley CSO Kingsley Brook 15 43 h 40m 0 h
United Utilities Elton PS West Central Drain, Mersey Est 12 40 h 6m -
United Utilities Off Well Lane Kingsley CSO Kingsley Brook 21 36 h 56m 62 h
United Utilities Town PS Manchester Ship Canal 6 29 h 15m 691 h
United Utilities Mickle Trafford PS Stanney Mill Brook 6 29 h 8m -
United Utilities Newtown PS River Weaver 4 25 h 7m -
United Utilities Waterside Drive CSO River Weaver 18 24 h 32m 30 h
United Utilities HELSBY WwTW Hornsmill Brook 5 16 h 57m 85 h
United Utilities Expressway 8, Runcorn (Weston Point, Point R) CSO Manchester Ship Canal 10 16 h 26m -
United Utilities Hardwick Street CSO Manchester Ship Canal 4 14 h 48m 0 h
United Utilities High Street/Moors Lane CSO Main Drain 10 11 h 52m 0 h
United Utilities Runcorn Town Hall CSO Willow Brook 5 8 h 54m -
United Utilities Penn Lane (Weston Point, Point R) combined sewer overflow (202LE) (HAL0060) Manchester Ship Canal 7 8 h 32m 0 h
United Utilities RUNCORN ROAD CSO Manchester Ship Canal 7 7 h 6m 0 h
United Utilities Halton Brow CSO Manchester Ship Canal 8 6 h 48m -
United Utilities Trentham Street PS River Mersey 8 6 h 45m 0 h
United Utilities The Brow CSO Manchester Ship Canal 3 3 h 2m 30 h
United Utilities HELSBY WwTW Hornsmill Brook 1 2 h 37m -
United Utilities Daresbury CSO River Mersey 6 2 h 8m 230 h
United Utilities Hatley Lane Frodsham Marsh Ditch 6 1 h 16m -
United Utilities Whitby Road CSO Manchester Ship Canal 5 1 h 6m -
United Utilities Waterside Drive CSO River Weaver 1 0 h 54m 0 h
United Utilities Waterloo Road Sewer Manchester Ship Canal 5 0 h 50m 32 h
United Utilities Trentham Street PS River Mersey 2 0 h 39m -
United Utilities Bridge Lane River Weaver 3 0 h 28m -
United Utilities Windsor Grove CSO Willow Brook 1 0 h 18m -
United Utilities RUNCORN ROAD CSO Manchester Ship Canal 1 0 h 14m -
United Utilities High Street/Moors Lane CSO Main Drain 0 0 h -
United Utilities Whitby Road CSO Manchester Ship Canal 0 0 h -
United Utilities Windsor Grove CSO Willow Brook 0 0 h -
United Utilities Bridge Lane River Weaver 0 0 h -
United Utilities South Parade CSO Weaver Navigation 0 0 h 3 h
United Utilities ICI Saltworks PS Manchester Ship Canal Via Sws 0 0 h -
United Utilities Waterloo Road Sewer Manchester Ship Canal 0 0 h -
United Utilities Runcorn Town Hall CSO Willow Brook 0 0 h -
United Utilities South Parade CSO Weaver Navigation 0 0 h -
United Utilities Downs Road CSO Bridgewater Canal Via Sws 0 0 h -
United Utilities Downs Road CSO Bridgewater Canal Via Sws 0 0 h 0 h
United Utilities Daresbury CSO River Mersey 0 0 h -
United Utilities Hatley Lane Frodsham Marsh Ditch 0 0 h -
United Utilities HELSBY WwTW Hornsmill Brook 0 0 h -
United Utilities Elton PS West Central Drain, Mersey Est 0 0 h -
United Utilities Hapsford PS Hornsmill Brook 0 0 h -
United Utilities Hapsford PS Hornsmill Brook 0 0 h -
United Utilities ICI Saltworks PS Manchester Ship Canal Via Sws 0 0 h -
United Utilities The Brow CSO Manchester Ship Canal 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.

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© Openstreetmap contributors, Contains OS data © Crown copyright and database right 2021-2025,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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