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Chorley

Polluted by sewage 892 times in 2025 lasting 4,050 hours

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

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Live data for Chorley in 2026

So far this year (as of 10 Aug 2026, 20:31) there has been 966 hours of sewage overflows, from 63 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Totals for Chorley in 2025

28 Sites polluted by United Utilities
892 sewage dumps
4,050 hours duration
That's 5.62 months. On average 2.4 times a day

Change Over Time

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Chorley in 2025. 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 all the declared CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s appeared to have monitoring enabled for more than 50% of the year

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
United Utilities Kyln Clough, R Lostock WITHNELL FOLD NETWORK PUMPING STATI 88 960 99.8
United Utilities River Douglas NR HARRISONS FARM 63 739 99.6
United Utilities River Yarrow COPPULL NEW RD/BUTTERWORTH RD CSO 83 421 99.7
United Utilities River Roddlesworth ABBEY VILLAGE PUMPING STATION 41 342 99.8
United Utilities Brinscall Brook LODGE BANK PUMPING STN 27 292 84.1
United Utilities River Yarrow CHORLEY LOWER WORKS PS 48 265 99.8
United Utilities River Chor O/S 8 HARDY DRIVE CSO 99 196 99.1
United Utilities River Yarrow ADJ DUXBURY MILL P.S. CSO ID 12006 61 171 99.9
United Utilities Chapel Brook EARLS WAY CSO 12066 51 121 99.2
United Utilities River Yarrow CHORLEY WASTE WATER TREATMENT WORKS 18 105 95.7
United Utilities Black Brook COWLING BROW CSO CHORL 43 69 100
United Utilities Bow Brook LANCASTER LANE CSO 12045 53 64 99.7
United Utilities River Douglas HARRISON ROAD WAGON AND HORSE CSO 43 55 99.5
United Utilities Sws To River Yarrow CLOVER ROAD BUTTERWORTH BROW CSO 37 53 96.7
United Utilities Tanyard Brook HEWLETT AVENUE CSO 27 32 100
United Utilities Kenyon Brook OFF BRIDGE ST 3 27 100
United Utilities River Chor LYDD GROVE PS 9 19 100
United Utilities River Yarrow EAVES GREEN RD CSO 12 19 96.8
United Utilities River Lostock KERN MILL LANE CSO 122BI 6 16 91.4
United Utilities River Douglas GRIMEFORD LANE PS 12007 2 15 99.9
United Utilities Plock Wood Stream EAVES GREEN RD CSO 24 11 99.5
United Utilities Black Brook River Yarrow BAGANLEY FROOM CSO 121CW 12 10 100
United Utilities River Yarrow MOOR ROAD EAVES GREEN RD CSO 122GB 23 9 99.8
United Utilities Clvrted River Chor 96 COLLINGWOOD ROAD CSO 121PB 10 8 99.9
United Utilities River Yarrow CLOVER ROAD PUMPING STATION 4 8 100
United Utilities River Chor Diversion Channel COMMON BANK LANE CSO CHORL 1 8 99.3
United Utilities River Chor River Yarrow PARKLANDS CSO 123JR CHR0015 2 3 97.5
United Utilities River Yarrow LIMBRICK PUMPING STATION 2 0 99.9
United Utilities River Chor FRIDAY STREET CSO 121UY 0 0 96.8
United Utilities Ransnap Brook GLENCROFT PUMPING STATION 0 0 95.6
United Utilities Black Brook, R Yarrow HEAPEY ROAD CSO 121YP 0 0 99.4

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.

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