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Polluted by sewage 1,328 times in 2024 lasting 6,532 hours
Monitoring fell below 50% in some locations so could be more
So far this year (as of May 29, 2025, 1:15 AM) there has been 1,512 hours of sewage overflows
Your local MP is Lindsay Hoyle (Speaker) - Find out more about their interests, donors, and voting at They Work For You
We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Chorley, here you can see overflows in red, the darker the red, the more the CSO overflowed that day.
Each CSO has a row, the most recent data is on the right hand side.
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Donate NowHere are all the reported sewage overflow totals for Chorley in 2024. 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 2 of the total 32 CSO locations had reporting enabled for less than half the year.
| Company | Waterway | Site | Sewage Dumps | Duration (Hours) | Reporting % |
|---|---|---|---|---|---|
| United Utilities | Kyln Clough, R Lostock | WITHNELL FOLD NETWORK PUMPING STATI | 160 | 2,010 | 13.3 |
| United Utilities | River Douglas | NR HARRISONS FARM | 113 | 947 | 99.6 |
| United Utilities | Clancutt Brook | MAVIS DRIVE | 39 | 499 | 97.8 |
| United Utilities | River Yarrow | CHORLEY LOWER WORKS PS | 58 | 349 | 100 |
| United Utilities | River Yarrow | COPPULL NEW RD/BUTTERWORTH RD CSO | 106 | 341 | 99.3 |
| United Utilities | River Roddlesworth | ABBEY VILLAGE PUMPING STATION | 40 | 339 | 100 |
| United Utilities | River Lostock | KERN MILL LANE CSO 122BI | 41 | 292 | 98.8 |
| United Utilities | River Yarrow | ADJ DUXBURY MILL P.S. CSO ID 12006 | 72 | 236 | 99.4 |
| United Utilities | River Chor | O/S 8 HARDY DRIVE CSO | 127 | 201 | 95.8 |
| United Utilities | Black Brook River Yarrow | BAGANLEY FROOM CSO 121CW | 40 | 193 | 98.2 |
| United Utilities | Sws To River Yarrow | CLOVER ROAD BUTTERWORTH BROW CSO | 71 | 177 | 99.6 |
| United Utilities | River Yarrow | CHORLEY WASTE WATER TREATMENT WORKS | 20 | 134 | 100 |
| United Utilities | Brinscall Brook | LODGE BANK PUMPING STN | 25 | 133 | 100 |
| United Utilities | Chapel Brook | EARLS WAY CSO 12066 | 41 | 125 | 99.1 |
| United Utilities | Black Brook | COWLING BROW CSO CHORL | 62 | 120 | 99 |
| United Utilities | River Douglas | HARRISON ROAD WAGON AND HORSE CSO | 34 | 88 | 99.8 |
| United Utilities | Kenyon Brook | OFF BRIDGE ST | 10 | 65 | 100 |
| United Utilities | Bow Brook | LANCASTER LANE CSO 12045 | 30 | 59 | 13.3 |
| United Utilities | Tanyard Brook | HEWLETT AVENUE CSO | 27 | 35 | 100 |
| United Utilities | River Douglas | GRIMEFORD LANE PS 12007 | 15 | 33 | 100 |
| United Utilities | Plock Wood Stream | EAVES GREEN RD CSO | 29 | 28 | 99.1 |
| United Utilities | River Yarrow | MOOR ROAD EAVES GREEN RD CSO 122GB | 52 | 27 | 98.5 |
| United Utilities | River Chor River Yarrow | PARKLANDS CSO 123JR CHR0015 | 48 | 24 | 90.3 |
| United Utilities | River Yarrow | EAVES GREEN RD CSO | 18 | 22 | 99.2 |
| United Utilities | River Chor | LYDD GROVE PS | 14 | 19 | 100 |
| United Utilities | Clvrted River Chor | 96 COLLINGWOOD ROAD CSO 121PB | 18 | 9 | 99.1 |
| United Utilities | River Yarrow | CLOVER ROAD PUMPING STATION | 7 | 7 | 100 |
| United Utilities | River Chor Diversion Channel | COMMON BANK LANE CSO CHORL | 3 | 3 | 100 |
| United Utilities | Black Brook, R Yarrow | HEAPEY ROAD CSO 121YP | 2 | 1 | 99.1 |
| United Utilities | River Yarrow | LIMBRICK PUMPING STATION | 5 | 0 | 99.9 |
| United Utilities | Ransnap Brook | GLENCROFT PUMPING STATION | 1 | 0 | 99.4 |
| United Utilities | River Chor | FRIDAY STREET CSO 121UY | 0 | 0 | 98.4 |
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.
Get in touch if you have queries or want to discuss our data.
press [at] top-of-the-poops.org