Rossendale and Darwen - 2025 Sewage

Polluted by sewage 5,802 hours in 2025

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

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Rossendale and Darwen for 2025. It is an estimate, based on very poor quality live data from the Water Companies. This may not align with the 'official' reported sewage values from the water companies, which is reported in April following then end of the year - so 2025 numbers are reported in April 2026.

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Daily Data

We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Rossendale and Darwen, 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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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Total Duration (days)
United Utilities The Glen CSO River Irwell 107 949 h 46m 39.54
United Utilities ROSSENDALE WwTW River Irwell 60 811 h 35m 33.79
United Utilities The Glen CSO River Irwell 27 433 h 14m 18.04
United Utilities ROSSENDALE WwTW River Irwell 24 393 h 58m 16.38
United Utilities 295 BACUP ROAD CSO River Irwell 22 274 h 24m 11.42
United Utilities 295 BACUP ROAD CSO River Irwell 47 197 h 46m 8.21
United Utilities Bolton Road CSO Bradshaw Brook 35 191 h 38m 7.96
United Utilities Lower Eccleshill Road CSO River Darwen 25 184 h 53m 7.67
United Utilities 100Metres East of No. XX Eastgate CSO River Spodden 36 181 h 41m 7.54
United Utilities Bacup Road/Markross Street CSO River Irwell 37 148 h 48m 6.17
United Utilities Lower Eccleshill Road CSO River Darwen 16 139 h 29m 5.79
United Utilities Newchurch Road CSO River Irwell 15 118 h 39m 4.92
United Utilities Newchurch Road CSO River Irwell 11 107 h 4.46
United Utilities Bolton Road CSO Bradshaw Brook 13 106 h 26m 4.42
United Utilities NEWCHURCH ROAD / BROOKS STREET CSO River Irwell 37 98 h 56m 4.08
United Utilities Bank Street CSO Limy Water R Irwell 32 94 h 48m 3.92
United Utilities 143 Burnley Road East CSO Whitewell Brook 20 86 h 22m 3.58
United Utilities 100Metres East of No. XX Eastgate CSO River Spodden 14 82 h 3m 3.42
United Utilities Helmshore Caravan Park combined sewer overflow Swinnel Brook 31 81 h 37m 3.38
United Utilities New Hall Hey Road CSO River Irwell 20 68 h 18m 2.83
United Utilities NEWCHURCH ROAD / BROOKS STREET CSO River Irwell 15 61 h 2.54
United Utilities Clarence Street CSO River Darwen 30 60 h 55m 2.5
United Utilities ANYON STREET / LAUREL AVENUE CSO River Darwen 40 59 h 48m 2.46
United Utilities Rushbed SSO Limy Water 13 50 h 18m 2.08
United Utilities NEWCHURCH ROAD / WESLEY PLACE CSO River Irwell 22 49 h 18m 2.04
United Utilities Balle Street CSO No.X River Darwen 38 49 h 8m 2.04
United Utilities Bank Street CSO Limy Water R Irwell 12 48 h 4m 2
United Utilities HIGHER PERRY STREET/BACK LAUREL CSO River Darwen 44 47 h 42m 1.96
United Utilities ANYON STREET / LAUREL AVENUE CSO River Darwen 15 46 h 52m 1.92
United Utilities New Hall Hey Road CSO River Irwell 10 43 h 14m 1.79
United Utilities 143 Burnley Road East CSO Whitewell Brook 6 36 h 1.5
United Utilities Waterside CSO Waterside Brook 8 33 h 42m 1.38
United Utilities Grimshaw Street Combined Sewer Overflow (Site ID 05033) (BBN0107) River Darwen 20 32 h 12m 1.33
United Utilities BALLE STREET / HILTON STREET CSO River Darwen 30 30 h 2m 1.25
United Utilities WATERBARN LANE CSO River Irwell 6 26 h 48m 1.08
United Utilities Highfield Road CSO River Irwell 9 26 h 31m 1.08
United Utilities COTTON HALL STREET CSO River Darwen 30 26 h 22m 1.08
United Utilities Helmshore Caravan Park combined sewer overflow Swinnel Brook 12 22 h 6m 0.92
United Utilities Sudell Road CSO River Darwen 19 21 h 26m 0.88
United Utilities Bacup Road/Markross Street CSO River Irwell 10 20 h 5m 0.83
United Utilities HIGHER PERRY STREET/BACK LAUREL CSO River Darwen 12 18 h 42m 0.75
United Utilities NEWCHURCH ROAD / WESLEY PLACE CSO River Irwell 8 17 h 26m 0.71
United Utilities Hindle Street CSO River Darwen Via Sws 10 16 h 26m 0.67
United Utilities 28 Tythebarn Street CSO River Darwen 13 15 h 45m 0.62
United Utilities Burnley Road East/Booth Street CSO Whitewell Brook 15 12 h 42m 0.5
United Utilities COTTON HALL STREET CSO River Darwen 11 12 h 2m 0.5
United Utilities Balle Street CSO No.X River Darwen 10 11 h 22m 0.46
United Utilities BROADHEAD ROAD CSO Quarlton Brook 7 11 h 18m 0.46
United Utilities Cowm Park Way South River Spodden 3 11 h 14m 0.46
United Utilities Clarence Street CSO River Darwen 8 11 h 12m 0.46
United Utilities Irwell Vale PS River Ogden 5 10 h 12m 0.42
United Utilities Highfield Road CSO River Irwell 5 10 h 8m 0.42
United Utilities BALLE STREET / HILTON STREET CSO River Darwen 8 9 h 36m 0.38
United Utilities NEWCHURCH ROAD (Bacup) CSO River Irwell 5 9 h 4m 0.38
United Utilities Hammerton Street/Stanley Street CSO River Irwell 7 8 h 34m 0.33
United Utilities BURNLEY ROAD (BACUP) CSO River Irwell 3 8 h 32m 0.33
United Utilities Cowpe Road SSO River Irwell 6 7 h 38m 0.29
United Utilities Station Road (Whitworth) CSO River Spodden 3 7 h 36m 0.29
United Utilities Cranberry Lane CSO River Darwen 4 7 h 18m 0.29
United Utilities OPPOSITE 709 BACUP ROAD CSO River Irwell 3 4 h 36m 0.17
United Utilities Burnley Road East/Booth Street CSO Whitewell Brook 2 4 h 4m 0.17
United Utilities Rushbed SSO Limy Water 2 3 h 46m 0.12
United Utilities Waterside CSO Waterside Brook 4 3 h 44m 0.12
United Utilities Bolton Road/ Astley Street CSO Kebbs Brook, Riv Darwen 11 3 h 15m 0.12
United Utilities ROCKCLIFFE ROAD / RIVER STREET CSO River Irwell 2 3 h 14m 0.12
United Utilities Burnley Road East/Whitewall Bottom CSO Whitewell Brook 2 2 h 58m 0.08
United Utilities Sudell Road CSO River Darwen 4 2 h 6m 0.08
United Utilities CHURCH STREET / PARLIAMENT STREEET CSO Culverted Section River Darwen 7 2 h 6m 0.08
United Utilities SOUTH STREET / PICKUP STREET CSO River Irwell 5 1 h 32m 0.04
United Utilities Grimshaw Street Combined Sewer Overflow (Site ID 05033) (BBN0107) River Darwen 3 1 h 30m 0.04
United Utilities Lee Road CSO River Irwell 2 1 h 20m 0.04
United Utilities WATERBARN LANE CSO River Irwell 3 1 h 18m 0.04
United Utilities Kay Street River Darwen 1 1 h 4m 0.04
United Utilities Burnley Road East/Shawclough Road CSO Whitewll Brook 1 1 h 2m 0.04
United Utilities Vale Street River Darwen 1 0 h 56m 0
United Utilities NEWCHURCH ROAD (Bacup) CSO River Irwell 1 0 h 52m 0
United Utilities Burnley Road/Middlegate CSO Limy Water Irwell 13 0 h 38m 0
United Utilities REDEARTH ROAD / SUDELL ROAD CSO River Darwen 2 0 h 36m 0
United Utilities Bolton Road CSO River Darwen 2 0 h 36m 0
United Utilities Footpath Near Cross Street CSO River Darwen 1 0 h 34m 0
United Utilities Burnley Road East/Townley Arms CSO Whitewell Brook 7 0 h 14m 0
United Utilities Bolton Road/ Astley Street CSO Kebbs Brook, Riv Darwen 1 0 h 5m 0
United Utilities BELMONT WwTW Eagley Brook 1 0 h 4m 0
United Utilities 28 Tythebarn Street CSO River Darwen 1 0 h 4m 0
United Utilities BROADHEAD ROAD CSO Quarlton Brook 1 0 h 2m 0
United Utilities CHURCH STREET / PARLIAMENT STREEET CSO Culverted Section River Darwen 1 0 h 2m 0
United Utilities Belgrave Road CSO River Darwen 1 0 h 2m 0
United Utilities Hindle Street CSO River Darwen Via Sws 1 0 h 2m 0
United Utilities 876 Burnley Road East CSO Whitewell Brook 0 0 h 0
United Utilities ROCKCLIFFE ROAD / RIVER STREET CSO River Irwell 0 0 h 0
United Utilities Burnley Road East/Townley Arms CSO Whitewell Brook 0 0 h 0
United Utilities Burnley Road East/Shawclough Road CSO Whitewll Brook 0 0 h 0
United Utilities OPPOSITE 709 BACUP ROAD CSO River Irwell 0 0 h 0
United Utilities SOUTH STREET / PICKUP STREET CSO River Irwell 0 0 h 0
United Utilities Woodvale Flats combined sewer overflow (059AF) (BBN0151) River Darwen 0 0 h 0
United Utilities WELLINGTON HOTEL CSO Culverted River Irwell 0 0 h 0
United Utilities Footpath Near Cross Street CSO River Darwen 0 0 h 0
United Utilities Lee Road CSO River Irwell 0 0 h 0
United Utilities BURNLEY ROAD (BACUP) CSO River Irwell 0 0 h 0
United Utilities WELLINGTON HOTEL CSO Culverted River Irwell 0 0 h 0
United Utilities Cranberry Lane CSO River Darwen 0 0 h 0
United Utilities New Hall Hey Bridge CSO River Irwell 0 0 h 0
United Utilities BELMONT WwTW Eagley Brook 0 0 h 0
United Utilities Bolton Road CSO River Darwen 0 0 h 0
United Utilities Sudellside Street CSO River Darwen 0 0 h 0
United Utilities Belgrave Road CSO River Darwen 0 0 h 0
United Utilities Greave Clough Drive CSO Greave Clough Via Sws 0 0 h 0
United Utilities Vale Street River Darwen 0 0 h 0
United Utilities Greave Clough Drive CSO Greave Clough Via Sws 0 0 h 0
United Utilities Bolton Road CSO River Darwen 0 0 h 0
United Utilities Cowpe Road SSO River Irwell 0 0 h 0
United Utilities REDEARTH ROAD / SUDELL ROAD CSO River Darwen 0 0 h 0
United Utilities Blackwood Road River Irwell 0 0 h 0
United Utilities Sudellside Street CSO River Darwen 0 0 h 0
United Utilities Blackwood Road River Irwell 0 0 h 0
United Utilities RAILWAY ROAD / SOUTH STREET CSO Clvrtd Section Of River Darwen 0 0 h 0
United Utilities Queen's Road CSO River Darwen 0 0 h 0
United Utilities 876 Burnley Road East CSO Whitewell Brook 0 0 h 0
United Utilities Woodvale Flats combined sewer overflow (059AF) (BBN0151) River Darwen 0 0 h 0
United Utilities Irwell Vale PS River Ogden 0 0 h 0
United Utilities TONG LANE / REED STREET CSO Gleave Clough Brook 0 0 h 0
United Utilities Hammerton Street/Stanley Street CSO River Irwell 0 0 h 0
United Utilities Cowm Park Way South River Spodden 0 0 h 0
United Utilities Burnley Road East/Whitewall Bottom CSO Whitewell Brook 0 0 h 0
United Utilities Boothfold Bridge CSO (369DI) Whitewell Brook 0 0 h 0
United Utilities Kay Street River Darwen 0 0 h 0
United Utilities RAILWAY ROAD / SOUTH STREET CSO Clvrtd Section Of River Darwen 0 0 h 0
United Utilities Station Road (Whitworth) CSO River Spodden 0 0 h 0
United Utilities Boothfold Bridge CSO (369DI) Whitewell Brook 0 0 h 0
United Utilities New Hall Hey Bridge CSO River Irwell 0 0 h 0
United Utilities Bolton Road CSO River Darwen 0 0 h 0
United Utilities Burnley Road/Middlegate CSO Limy Water Irwell 0 0 h 0

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.