It's a Dirty Business

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Bolton South and Walkden - Live Sewage

Polluted by sewage 1,004 hours in 2026 , monitoring offline 3,648 hours , potential overflows 159 hours so far..

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

Which Year?

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✔ means we have live data (𝑥 if not)

View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Bolton South and Walkden so far for 2026. It is an estimate, based on very poor quality live data from the Water Companies. The water companies report their sewage to the Environment Agency every year in April. You can see the last reported year in the other page

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 - 106 hours , 1 potential
Feb - 841 hours , 2 potential
Mar - 56 hours , 154 potential
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
United Utilities BOLTON WwTW River Irwell 13 194 h 4m -
United Utilities BOLTON WwTW River Irwell 14 170 h 5m -
United Utilities West of Hacken Works (Syphon) CSO River Croal 32 137 h 55m -
United Utilities 91 Manchester Road CSO Croal Minor 34 81 h 20m 3 h
United Utilities WORSLEY WwTW Little Hulton Stream 16 61 h 38m 158 h
United Utilities WORSLEY WwTW Little Hulton Stream 8 58 h 49m 2 h
United Utilities HULTON LANE ENDS WwTW Unity Brook 16 52 h 33m -
United Utilities No 76 Middle Brook CSO Middle Brook 27 47 h 12m 2 h
United Utilities Clammerclough CSO River Croal 28 45 h 8m 0 h
United Utilities Blackshaw Lane CSO Middle Brook 18 44 h 26m -
United Utilities Bridgeman Park Combined Sewer Overflow River Croal 10 28 h 26m 17 h
United Utilities Weston Street CSO (073K8) Jenny Beck Culvert Via Surface Water Sewer 12 15 h 19 h
United Utilities Weston Street/Viking Street CSO Jenny Beck Rvr Croal 9 11 h 56m -
United Utilities Kearsley PS River Irwell 4 10 h 30m -
United Utilities Rishton Lane CSO Jenny Beck, Rv Croal 9 10 h 6m -
United Utilities Singing Clough CSO Clvrt Singing Clough Brook 9 9 h 1m -
United Utilities Stonehill Road CSO Culvrt Singing Clough Brook 4 5 h 28m -
United Utilities Tynesbank CSO Ellen Brook Culvert 4 4 h 38m 0 h
United Utilities Lever Street Number 3 CSO Jenny Beck 8 4 h 32m -
United Utilities Adelaide Street CSO Manchester Ship Canal 4 3 h 20m -
United Utilities WORSLEY WwTW Little Hulton Stream 4 2 h 12m 2 h
United Utilities Stonehill Road CSO Culvrt Singing Clough Brook 4 2 h 2m -
United Utilities Stonehill Trading Estate CSO Singing Clough Brook 2 1 h 6m -
United Utilities ALBERT ROAD CSO Middle Brook 4 1 h 4m -
United Utilities South of Ashawe Grove CSO Honksford Brook 2 0 h 50m -
United Utilities CHURCH WHARF CSO Clvrt Sec River Croal Minor 2 0 h 34m -
United Utilities St Peters Way/Springfield Industrial Estate CSO River Croal 4 0 h 30m -
United Utilities Church Bank (Side of Viaduct) Croal Minor 1 0 h 8m -
United Utilities Manchester Road / Corrie Drive CSO (079DB) Unity Brook 2 0 h 4m 1 h
United Utilities LITTLE HULTON CSO Astley Brook 1 0 h 2m 0 h
United Utilities Adelaide Street CSO Manchester Ship Canal 0 0 h -
United Utilities Stonehill Trading Estate CSO Singing Clough Brook 0 0 h -
United Utilities South of Ashawe Grove CSO Honksford Brook 0 0 h -
United Utilities Singing Clough CSO Clvrt River Irwell 0 0 h -
United Utilities LITTLE HULTON CSO Astley Brook 0 0 h -
United Utilities CHURCH BANK / RAILWAY VIADUCT CSO Croal Minor 0 0 h -
United Utilities No 76 Middle Brook CSO Middle Brook 0 0 h -
United Utilities Fern Street CSO River Croal 0 0 h -
United Utilities Walkden Road/Hoylake Road CSO Worsley Brook 0 0 h -
United Utilities Croft Lane / Manchester Road CSO Jenny Beck Culvert River Croal 0 0 h -
United Utilities Lever Street Number 1 CSO A Culverted Section Jenny Beck 0 0 h -
United Utilities Croft Lane / Manchester Road CSO Jenny Beck Culvert River Croal 0 0 h -
United Utilities WORSLEY WwTW Little Hulton Stream 0 0 h -
United Utilities Fern Street CSO River Croal 0 0 h -
United Utilities Rishton Lane CSO Jenny Beck, Rv Croal 0 0 h -
United Utilities Orlando Street CSO Croal Minor 0 0 h -
United Utilities CHURCH BANK / RAILWAY VIADUCT CSO Croal Minor 0 0 h -
United Utilities Prestolee PS River Irwell 0 0 h -
United Utilities Orlando Street CSO Croal Minor 0 0 h -
United Utilities St Peters Way/Springfield Industrial Estate CSO River Croal 0 0 h -
United Utilities Singing Clough CSO Clvrt River Irwell 0 0 h -
United Utilities CHURCH WHARF CSO Clvrt Sec River Croal Minor 0 0 h -
United Utilities Beech Grove CSO Honksford Brook Via Sws 0 0 h 1,799 h
United Utilities Blackshaw Lane CSO Middle Brook 0 0 h -
United Utilities Bridgeman Street/Higher Swan Lane CSO Jenny Beck 0 0 h -
United Utilities Tynesbank CSO Ellen Brook Culvert 0 0 h -
United Utilities Stonehill Road CSO Culvrt Singing Clough Brook 0 0 h -
United Utilities Lever Street Number 3 CSO Jenny Beck 0 0 h -
United Utilities Singing Clough CSO Clvrt Singing Clough Brook 0 0 h -
United Utilities Riverside CSO River Irwell 0 0 h -
United Utilities Kearsley PS River Irwell 0 0 h -
United Utilities Lever Street Number 1 CSO A Culverted Section Jenny Beck 0 0 h -
United Utilities Hall Lane Combined Sewer Overflow (Site ID 07035) (BOL0145) River Croal 0 0 h -
United Utilities Clammerclough CSO River Croal 0 0 h -
United Utilities ALBERT ROAD CSO Middle Brook 0 0 h -
United Utilities BOLTON WwTW River Irwell 0 0 h -
United Utilities WORSLEY WwTW Little Hulton Stream 0 0 h -
United Utilities Manchester Road / Corrie Drive CSO (079DB) Unity Brook 0 0 h -
United Utilities WORSLEY WwTW Little Hulton Stream 0 0 h -
United Utilities Riverside CSO River Irwell 0 0 h -
United Utilities West of Hacken Works (Syphon) CSO River Croal 0 0 h -
United Utilities Church Bank (Side of Viaduct) Croal Minor 0 0 h -
United Utilities Walkden Road/Hoylake Road CSO Worsley Brook 0 0 h 0 h
United Utilities Bridgeman Park Combined Sewer Overflow River Croal 0 0 h -
United Utilities Weston Street CSO (073K8) Jenny Beck Culvert Via Surface Water Sewer 0 0 h -
United Utilities HULTON LANE ENDS WwTW Unity Brook 0 0 h -
United Utilities Lever Street Number 5 CSO Jenny Beck Rvr Croal 0 0 h -
United Utilities Bridgeman Street/Higher Swan Lane CSO Jenny Beck 0 0 h -
United Utilities South of Ashawe Grove CSO Honksford Brook 0 0 h -
United Utilities BOLTON WwTW River Irwell 0 0 h -
United Utilities Prestolee PS River Irwell 0 0 h 1,799 h
United Utilities Hall Lane Combined Sewer Overflow (Site ID 07035) (BOL0145) River Croal 0 0 h -
United Utilities South of Ashawe Grove CSO Honksford Brook 0 0 h -
United Utilities Beech Grove CSO Honksford Brook Via Sws 0 0 h -
United Utilities 91 Manchester Road CSO Croal Minor 0 0 h -
United Utilities Weston Street/Viking Street CSO Jenny Beck Rvr Croal 0 0 h -
United Utilities Lever Street Number 5 CSO Jenny Beck Rvr Croal 0 0 h -
United Utilities Stonehill Road CSO Culvrt Singing Clough 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.