Chorley was polluted by sewage 1,818 times in 2023
lasting 10,144 hours - that's 1.17 years!
- but monitoring was disabled in some locations, so could be more

© OpenStreetMap contributors
Contains OS Data © Crown copyright & database right 2021-2023
© Top of the Poops 2021-2023
✔ means we have experimental daily data since 2023
Totals for Chorley in 2023
33 Sites polluted by United Utilities
1,818 sewage dumps
10,144 h duration
That's 1.17 years! On average 5 times a day
Change Over Time
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Pollution Summary 2023

Here are all the reported sewage overflow totals for Chorley in 2023. Sometimes sewage can be being dumped for months at a time.

Reporting refers to how much of the time the monitoring was active. In this constituency 1 of the total 36 CSO locations had reporting enabled for less than half the year, of which 1 had zero reporting.

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
United Utilities Kyln Clough, R Lostock WITHNELL FOLD NETWORK PUMPING STATI 172 2,833 100
United Utilities Clancutt Brook COWLING FARM CSO 88 1,354 100
United Utilities Clancutt Brook MAVIS DRIVE 142 1,013 100
United Utilities River Douglas NR HARRISONS FARM 69 586 95.4
United Utilities River Yarrow COPPULL NEW RD/BUTTERWORTH RD CSO 110 439 100
United Utilities River Roddlesworth ABBEY VILLAGE PUMPING STATION 53 381 100
United Utilities Black Brook River Yarrow BAGANLEY FROOM CSO 121CW 62 367 100
United Utilities Unnamed Syd Brook BROOK LANE PUMPING STATION 51 361 100
United Utilities River Yarrow CHORLEY LOWER WORKS PS 45 299 100
United Utilities Sws To River Yarrow CLOVER ROAD BUTTERWORTH BROW CSO 95 290 99.9
United Utilities River Yarrow 39 PARK AVENUE CSO 109 283 100
United Utilities River Yarrow ADJ DUXBURY MILL P.S. CSO ID 12006 82 251 100
United Utilities Kenyon Brook OFF BRIDGE ST 18 250 100
United Utilities River Chor O/S 8 HARDY DRIVE CSO 126 234 100
United Utilities Chapel Brook EARLS WAY CSO 12066 83 222 36.8
United Utilities River Yarrow CHORLEY WASTE WATER TREATMENT WORKS 36 193 96.9
United Utilities Brinscall Brook LODGE BANK PUMPING STN 25 146 100
United Utilities Black Brook COWLING BROW CSO CHORL 57 121 100
United Utilities Bow Brook LANCASTER LANE CSO 12045 63 87 100
United Utilities River Lostock KERN MILL LANE CSO 122BI 36 81 100
United Utilities River Douglas HARRISON ROAD WAGON AND HORSE CSO 44 79 94.6
United Utilities River Yarrow CLOVER ROAD PUMPING STATION 17 52 100
United Utilities Plock Wood Stream EAVES GREEN RD CSO 43 52 100
United Utilities Tanyard Brook HEWLETT AVENUE CSO 41 49 99
United Utilities River Yarrow MOOR ROAD EAVES GREEN RD CSO 122GB 62 41 100
United Utilities River Douglas GRIMEFORD LANE PS 12007 13 25 100
United Utilities River Yarrow EAVES GREEN RD CSO 25 18 100
United Utilities River Chor LYDD GROVE PS 12 10 100
United Utilities Clvrted River Chor 96 COLLINGWOOD ROAD CSO 121PB 25 8 100
United Utilities River Yarrow LIMBRICK PUMPING STATION 9 3 100
United Utilities River Chor Diversion Channel COMMON BANK LANE CSO CHORL 2 0 100
United Utilities River Chor River Yarrow PARKLANDS CSO 123JR CHR0015 2 0 100
United Utilities Black Brook, R Yarrow HEAPEY ROAD CSO 121YP 1 0 100
United Utilities Syd Brook SOUTH PARK HALL/STOCKS LANE HESKIN 0 0 0
United Utilities River Chor FRIDAY STREET CSO 121UY 0 0 96.3
United Utilities Ransnap Brook GLENCROFT PUMPING STATION 0 0 96.1

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. This 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.