It's a Dirty Business

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Bolton West - Live Sewage

Polluted by sewage 586 hours in 2026 , monitoring offline 687 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 West 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 - 78 hours , 0 potential
Feb - 370 hours , 50 offline
Mar - 80 hours , 308 offline
Apr - 25 hours , 288 offline
May - 31 hours , 18 offline
Jun - 0 hours
Jul - 0 hours
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
United Utilities WESTHOUGHTON WwTW Hall Lee Brook 34 238h 45m 20 h
United Utilities CHORLEY NEW ROAD / DEVONSHIRE ROAD CSO Middle Brook 36 128h 42m -
United Utilities ALBION TERRACE CSO Astley Brook 23 90h 28m -
United Utilities Chorley Old Road/Chorley New Road CSO Astley Brook 28 34h 32m -
United Utilities HORWICH WwTW Pearl Brook 9 31h 26m -
United Utilities HORWICH WwTW Pearl Brook 3 15h 9m -
United Utilities Wood Barn Farm CSO Unnamed River Douglas 17 14h 42m 0 h
United Utilities WESTHOUGHTON WwTW Hall Lee Brook 9 12h 6m -
United Utilities Harrisons Road Wagon & Horses CSO River Tame 10 5h 46m -
United Utilities Regent Road Bessy Brook Via Sws 8 5h 38m -
United Utilities PARK HALL FARM CSO Middle Brook 7 4h 14m 58 h
United Utilities Brook Dean Close (Smithhills Dean Road) Combined Sewer Overflow Dean Brook 3 1h 58m -
United Utilities Ladybridge Lane (Near Ladybridge Brow) CSO Middle Brook 4 1h 24m -
United Utilities Moss Bank Way/Chippings Road CSO Astley Brook 1 1h 20m -
United Utilities GISBURN AVENUE CSO Astley Brook 1 0h 14m -
United Utilities Heaton Bridge CSO Middle Brook 1 0h 14m -
United Utilities CHORLEY NEW ROAD CSO Middle Brook 1 0h 10m -
United Utilities Ash Grove/Southfield Drive CSO Culverted Cunningham Brk 1 0h 6m -
United Utilities Manchester Road/Hope Street CSO River Croal 1 0h 2m -
United Utilities CHORLEY NEW ROAD / TELFORD STREET CSO Middle Brook 0 0h -
United Utilities LIGHTBOUNDS ROAD / LOUVAINE AVENUE CSO Astley Brook 0 0h -
United Utilities Thompson Road Combined Sewer Overflow (Site ID 07055) (BOL0053) Captains Clough 0 0h -
United Utilities WESTHOUGHTON WwTW Hall Lee Brook 0 0h -
United Utilities St Johns Road CSO Middle Brook 0 0h -
United Utilities Junction of Manchester/Station Road CSO Middle Brook 0 0h -
United Utilities Brook Dean Close (Smithhills Dean Road) Combined Sewer Overflow Dean Brook 0 0h -
United Utilities Moss Bank Way/Chippings Road CSO Astley Brook 0 0h -
United Utilities Chorley New Road/Beaumont Road CSO Pearl Brook 0 0h -
United Utilities Ladybridge Lane CSO Middle Brook 0 0h -
United Utilities Manchester Road/Hope Street CSO River Croal 0 0h -
United Utilities CHORLEY NEW ROAD CSO Middle Brook 0 0h -
United Utilities Downstream of No. 56 Barrow Bridge Road CSO Dean Brook 0 0h -
United Utilities Lostock Junction Lane CSO Bessy Brook 0 0h -
United Utilities CHORLEY NEW ROAD / DEVONSHIRE ROAD CSO Middle Brook 0 0h -
United Utilities Downstream of No. 56 Barrow Bridge Road CSO Dean Brook 0 0h -
United Utilities Chorley New Road/Beaumont Road CSO Pearl Brook 0 0h -
United Utilities GISBURN AVENUE CSO Astley Brook 0 0h -
United Utilities Regent Road Bessy Brook Via Sws 0 0h -
United Utilities Wood Barn Farm CSO Unnamed River Douglas 0 0h -
United Utilities Thompson Road Combined Sewer Overflow (Site ID 07055) (BOL0053) Captains Clough 0 0h 607 h
United Utilities Lostock Junction Lane CSO Bessy Brook 0 0h -
United Utilities PARK HALL FARM CSO Middle Brook 0 0h -
United Utilities Heaton Bridge CSO Middle Brook 0 0h -
United Utilities LIGHTBOUNDS ROAD / LOUVAINE AVENUE CSO Astley Brook 0 0h 0 h
United Utilities Ladybridge Lane CSO Middle Brook 0 0h -
United Utilities St Johns Road CSO Middle Brook 0 0h -
United Utilities Chorley Old Road/Chorley New Road CSO Astley Brook 0 0h -
United Utilities ALBION TERRACE CSO Astley Brook 0 0h -
United Utilities Ladybridge Lane (Near Ladybridge Brow) CSO Middle Brook 0 0h -
United Utilities Ash Grove/Southfield Drive CSO Culverted Cunningham Brk 0 0h -
United Utilities CHORLEY NEW ROAD / TELFORD STREET CSO Middle Brook 0 0h -
United Utilities Harrisons Road Wagon & Horses CSO River Tame 0 0h -
United Utilities Junction of Manchester/Station Road CSO Middle Brook 0 0h -
United Utilities HORWICH WwTW Pearl Brook 0 0h -
United Utilities HORWICH WwTW Pearl Brook 0 0h -
United Utilities WESTHOUGHTON WwTW Hall Lee Brook 0 0h -

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.