Chorley - Live Sewage

Polluted by sewage 1,577 hours in 2026 , monitoring offline 2,263 hours , potential overflows 46 hours so far..

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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 Chorley 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.

Totals for Chorley in 2026

Sewage1,577 hours
Monitoring offline2,263 hours
Potential pollution46 hours
Storm overflows63

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Daily Data

Jan - 333 hours , 30 potential
Feb - 336 hours , 0 potential
Mar - 239 hours , 0 potential
Apr - 17 hours , 720 offline
May - 32 hours , 745 offline
Jun - 0 hours , 614 offline
Jul - 0 hours
Aug - 107 hours , 1 potential
Sept - 197 hours , 6 potential
Oct - 312 hours , 6 potential
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
United Utilities Near Harrison's Farm CSO River Douglas 39 296h 43m -
United Utilities Withnell Fold PS Kyln Clough, R Lostock 50 280h 4m -
United Utilities Coppull New Road/Butterworth Brow CSO River Yarrow 60 244h 12m 1 h
United Utilities Abbey Village Pumping Station (12001) (CHR0080) River Roddlesworth 28 177h 25m -
United Utilities O/S 8 HARDY DRIVE CSO River Chor 75 105h 46m 27 h
United Utilities Chorley WwTW River Yarrow 15 100h 5m 25 h
United Utilities Chorley Lower Works PS River Yarrow 22 82h 41m -
United Utilities Adjacent Duxbury Mill Pumping Station Combined Sewer Overflow (CHR0024) River Yarrow 37 57h 30m -
United Utilities Lodge Bank PS Brinscall Brook 10 54h -
United Utilities Earls Way CSO Chapel Brook 31 45h 12m -
United Utilities Lancaster Lane CSO Mill Brook 29 25h 52m 1 h
United Utilities Clover Road/Butterworth Brow CSO Sws To River Yarrow 26 24h 9m -
United Utilities Cowling Brow CSO Black Brook 11 17h 12m -
United Utilities Eaves Green Road CSO River Yarrow 16 15h 30m -
United Utilities Moor Road/Eaves Green Road CSO River Yarrow 14 10h 38m -
United Utilities Baganley Froom CSO Black Brook River Yarrow 9 9h 42m -
United Utilities Kem Mill Lane CSO River Lostock 6 7h 34m -
United Utilities Off Bridge Street PS Kenyon Brook 2 6h 55m -
United Utilities Eaves Green Brook CSO River Yarrow 11 5h 28m -
United Utilities Duxbury Mill Farm PS River Yarrow 3 2h 10m 0 h
United Utilities Limbrick Pumping Station (12024) (CHR0030) River Yarrow 1 2h 5m -
United Utilities Grimeford Lane PS River Douglas 1 1h 44m -
United Utilities 96 COLLINGWOOD ROAD CSO Clvrted River Chor 6 1h 30m -
United Utilities Lydd Grove PS River Chor 5 1h 17m 2,254 h
United Utilities Clover Road PS River Yarrow 3 1h 9m -
United Utilities Common Bank Lane CSO River Chor Diversion Channel 1 0h 54m -
United Utilities Parklands CSO River Chor River Yarrow 0 0h -
United Utilities Chorley WwTW River Yarrow 0 0h -
United Utilities O/S 8 HARDY DRIVE CSO River Chor 0 0h -
United Utilities Parklands CSO River Chor River Yarrow 0 0h -
United Utilities Earls Way CSO Chapel Brook 0 0h -
United Utilities Coppull New Road/Butterworth Brow CSO River Yarrow 0 0h -
United Utilities Clover Road/Butterworth Brow CSO Sws To River Yarrow 0 0h -
United Utilities Eaves Green Brook CSO River Yarrow 0 0h -
United Utilities Eaves Green Road CSO River Yarrow 0 0h -
United Utilities Grimeford Lane PS River Douglas 0 0h -
United Utilities Heapey CSO Black Brook, R Yarrow 0 0h -
United Utilities Hewlett Avenue CSO Tanyard Brook 0 0h -
United Utilities Mavis Drive CSO Clancutt Brook 0 0h -
United Utilities Mavis Drive CSO Clancutt Brook 0 0h -
United Utilities Common Bank Lane CSO River Chor Diversion Channel 0 0h -
United Utilities Adjacent Duxbury Mill Pumping Station Combined Sewer Overflow (CHR0024) River Yarrow 0 0h -
United Utilities Limbrick Pumping Station (12024) (CHR0030) River Yarrow 0 0h -
United Utilities FRIDAY STREET CSO River Chor 0 0h -
United Utilities Heapey CSO Black Brook, R Yarrow 0 0h -
United Utilities Abbey Village Pumping Station (12001) (CHR0080) River Roddlesworth 0 0h -
United Utilities Duxbury Mill Farm PS River Yarrow 0 0h -
United Utilities Baganley Froom CSO Black Brook River Yarrow 0 0h -
United Utilities Chorley Lower Works PS River Yarrow 0 0h -
United Utilities Clover Road PS River Yarrow 0 0h -
United Utilities Lancaster Lane CSO Mill Brook 0 0h -
United Utilities Glencroft PS Ransnap Brook 0 0h -
United Utilities 96 COLLINGWOOD ROAD CSO Clvrted River Chor 0 0h -
United Utilities Lodge Bank PS Brinscall Brook 0 0h -
United Utilities Cowling Brow CSO Black Brook 0 0h -
United Utilities Moor Road/Eaves Green Road CSO River Yarrow 0 0h -
United Utilities Withnell Fold PS Kyln Clough, R Lostock 0 0h -
United Utilities Glencroft PS Ransnap Brook 0 0h -
United Utilities FRIDAY STREET CSO River Chor 0 0h -
United Utilities Lydd Grove PS River Chor 0 0h -
United Utilities Kem Mill Lane CSO River Lostock 0 0h -
United Utilities Off Bridge Street PS Kenyon Brook 0 0h -
United Utilities Near Harrison's Farm CSO River Douglas 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

Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.

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.