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Rossendale and Darwen - 2025 Sewage

Polluted by sewage 5,694 hours in 2025 , monitoring offline 6,533 hours , potential overflows 140 hours

© 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.

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.

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Daily Data

Jan - 1,294 hours , 39 potential
Feb - 125 hours , 0 potential
Mar - 5 hours , 0 potential
Apr - 4 hours , 375 offline
May - 66 hours , 398 offline
Jun - 113 hours , 2 potential
Jul - 60 hours , 2 potential
Aug - 32 hours , 754 offline
Sept - 675 hours , 7 potential
Oct - 634 hours , 8 potential
Nov - 1,109 hours , 32 potential
Dec - 1,572 hours , 22 potential
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
United Utilities The Glen CSO River Irwell 107 928 h 29m 80 h
United Utilities ROSSENDALE WwTW River Irwell 60 811 h 1m 0 h
United Utilities The Glen CSO River Irwell 27 415 h 21m 27 h
United Utilities ROSSENDALE WwTW River Irwell 24 393 h 58m -
United Utilities 295 BACUP ROAD CSO River Irwell 22 274 h 48m -
United Utilities 295 BACUP ROAD CSO River Irwell 47 198 h 38m -
United Utilities Bolton Road CSO Bradshaw Brook 35 191 h 38m -
United Utilities Lower Eccleshill Road CSO River Darwen 25 182 h 33m 2 h
United Utilities 100Metres East of No. XX Eastgate CSO River Spodden 36 182 h 15m -
United Utilities Bacup Road/Markross Street CSO River Irwell 37 148 h 48m 10 h
United Utilities Lower Eccleshill Road CSO River Darwen 16 137 h 17m 2 h
United Utilities Newchurch Road CSO River Irwell 15 118 h 39m -
United Utilities Newchurch Road CSO River Irwell 11 107 h -
United Utilities Bolton Road CSO Bradshaw Brook 13 106 h 26m -
United Utilities Bank Street CSO Limy Water R Irwell 32 94 h 48m 0 h
United Utilities NEWCHURCH ROAD / BROOKS STREET CSO River Irwell 37 91 h 24m 8 h
United Utilities 100Metres East of No. XX Eastgate CSO River Spodden 14 87 h 5m -
United Utilities Helmshore Caravan Park combined sewer overflow Swinnel Brook 31 81 h 57m 0 h
United Utilities 143 Burnley Road East CSO Whitewell Brook 19 71 h 30m 184 h
United Utilities New Hall Hey Road CSO River Irwell 20 68 h 18m 0 h
United Utilities Clarence Street CSO River Darwen 30 62 h 19m 0 h
United Utilities NEWCHURCH ROAD / BROOKS STREET CSO River Irwell 15 61 h -
United Utilities ANYON STREET / LAUREL AVENUE CSO River Darwen 40 60 h 22m 4 h
United Utilities Rushbed SSO Limy Water 13 50 h 18m -
United Utilities NEWCHURCH ROAD / WESLEY PLACE CSO River Irwell 22 49 h 34m -
United Utilities Bank Street CSO Limy Water R Irwell 12 48 h 4m -
United Utilities Balle Street CSO No.X River Darwen 38 47 h 50m 0 h
United Utilities ANYON STREET / LAUREL AVENUE CSO River Darwen 15 46 h 52m -
United Utilities New Hall Hey Road CSO River Irwell 10 43 h 14m -
United Utilities HIGHER PERRY STREET/BACK LAUREL CSO River Darwen 44 37 h 52m 22 h
United Utilities Waterside CSO Waterside Brook 8 33 h 42m -
United Utilities Grimshaw Street Combined Sewer Overflow (Site ID 05033) (BBN0107) River Darwen 20 32 h 55m -
United Utilities Highfield Road CSO River Irwell 9 26 h 31m -
United Utilities COTTON HALL STREET CSO River Darwen 30 25 h 56m 1 h
United Utilities Helmshore Caravan Park combined sewer overflow Swinnel Brook 12 22 h 12m 1 h
United Utilities WATERBARN LANE CSO River Irwell 6 21 h 34m 5 h
United Utilities Sudell Road CSO River Darwen 19 21 h 26m 2 h
United Utilities Bacup Road/Markross Street CSO River Irwell 10 20 h 5m -
United Utilities BALLE STREET / HILTON STREET CSO River Darwen 30 19 h 56m 24 h
United Utilities HIGHER PERRY STREET/BACK LAUREL CSO River Darwen 12 18 h 8m 2 h
United Utilities NEWCHURCH ROAD / WESLEY PLACE CSO River Irwell 8 17 h 36m -
United Utilities Hindle Street CSO River Darwen Via Sws 10 16 h 26m -
United Utilities 28 Tythebarn Street CSO River Darwen 13 15 h 46m -
United Utilities 143 Burnley Road East CSO Whitewell Brook 5 14 h 34m 283 h
United Utilities Burnley Road East/Booth Street CSO Whitewell Brook 15 12 h 46m 1 h
United Utilities COTTON HALL STREET CSO River Darwen 11 12 h 10m -
United Utilities BROADHEAD ROAD CSO Quarlton Brook 7 11 h 38m 4 h
United Utilities Balle Street CSO No.X River Darwen 10 11 h 22m -
United Utilities Cowm Park Way South River Spodden 3 11 h 14m -
United Utilities Clarence Street CSO River Darwen 8 11 h 12m -
United Utilities Irwell Vale PS River Ogden 5 10 h 12m 3,056 h
United Utilities Highfield Road CSO River Irwell 5 10 h 8m -
United Utilities Hammerton Street/Stanley Street CSO River Irwell 7 9 h 8m 9 h
United Utilities NEWCHURCH ROAD (Bacup) CSO River Irwell 5 9 h 4m -
United Utilities BURNLEY ROAD (BACUP) CSO River Irwell 3 8 h 32m 8 h
United Utilities Cowpe Road SSO River Irwell 6 7 h 40m 9 h
United Utilities Station Road (Whitworth) CSO River Spodden 3 7 h 36m 0 h
United Utilities Cranberry Lane CSO River Darwen 4 7 h 18m -
United Utilities BALLE STREET / HILTON STREET CSO River Darwen 8 6 h 6m 3 h
United Utilities OPPOSITE 709 BACUP ROAD CSO River Irwell 3 4 h 36m -
United Utilities Burnley Road East/Booth Street CSO Whitewell Brook 2 3 h 48m 24 h
United Utilities Rushbed SSO Limy Water 2 3 h 46m -
United Utilities Waterside CSO Waterside Brook 4 3 h 44m -
United Utilities Bolton Road/ Astley Street CSO Kebbs Brook, Riv Darwen 11 3 h 15m -
United Utilities Burnley Road East/Whitewall Bottom CSO Whitewell Brook 2 2 h 58m -
United Utilities ROCKCLIFFE ROAD / RIVER STREET CSO River Irwell 2 2 h 44m 2 h
United Utilities CHURCH STREET / PARLIAMENT STREEET CSO Culverted Section River Darwen 7 2 h 6m 1 h
United Utilities Sudell Road CSO River Darwen 4 2 h 6m -
United Utilities SOUTH STREET / PICKUP STREET CSO River Irwell 5 1 h 32m 0 h
United Utilities Grimshaw Street Combined Sewer Overflow (Site ID 05033) (BBN0107) River Darwen 3 1 h 30m -
United Utilities WATERBARN LANE CSO River Irwell 3 1 h 22m 1 h
United Utilities Lee Road CSO River Irwell 2 1 h 20m -
United Utilities Kay Street River Darwen 1 1 h 4m -
United Utilities Burnley Road East/Shawclough Road CSO Whitewll Brook 1 1 h 2m -
United Utilities Vale Street River Darwen 1 0 h 56m -
United Utilities NEWCHURCH ROAD (Bacup) CSO River Irwell 1 0 h 52m -
United Utilities Burnley Road/Middlegate CSO Limy Water Irwell 13 0 h 38m -
United Utilities REDEARTH ROAD / SUDELL ROAD CSO River Darwen 2 0 h 36m -
United Utilities Bolton Road CSO River Darwen 2 0 h 36m -
United Utilities Footpath Near Cross Street CSO River Darwen 1 0 h 34m -
United Utilities BELMONT WwTW Eagley Brook 1 0 h 15m 1,214 h
United Utilities Burnley Road East/Townley Arms CSO Whitewell Brook 7 0 h 14m 0 h
United Utilities Bolton Road/ Astley Street CSO Kebbs Brook, Riv Darwen 1 0 h 5m -
United Utilities 28 Tythebarn Street CSO River Darwen 1 0 h 4m -
United Utilities Belgrave Road CSO River Darwen 1 0 h 4m -
United Utilities BROADHEAD ROAD CSO Quarlton Brook 1 0 h 2m -
United Utilities Hindle Street CSO River Darwen Via Sws 1 0 h 2m -
United Utilities CHURCH STREET / PARLIAMENT STREEET CSO Culverted Section River Darwen 1 0 h 2m -
United Utilities Bolton Road CSO River Darwen 0 0 h -
United Utilities New Hall Hey Bridge CSO River Irwell 0 0 h -
United Utilities Kay Street River Darwen 0 0 h -
United Utilities Irwell Vale PS River Ogden 0 0 h -
United Utilities Bolton Road CSO River Darwen 0 0 h -
United Utilities Blackwood Road River Irwell 0 0 h 359 h
United Utilities Hammerton Street/Stanley Street CSO River Irwell 0 0 h -
United Utilities 876 Burnley Road East CSO Whitewell Brook 0 0 h 1 h
United Utilities WELLINGTON HOTEL CSO Culverted River Irwell 0 0 h -
United Utilities Blackwood Road River Irwell 0 0 h -
United Utilities 876 Burnley Road East CSO Whitewell Brook 0 0 h -
United Utilities ROCKCLIFFE ROAD / RIVER STREET CSO River Irwell 0 0 h -
United Utilities Cowm Park Way South River Spodden 0 0 h -
United Utilities Woodvale Flats combined sewer overflow (059AF) (BBN0151) River Darwen 0 0 h -
United Utilities SOUTH STREET / PICKUP STREET CSO River Irwell 0 0 h -
United Utilities Burnley Road East/Shawclough Road CSO Whitewll Brook 0 0 h 0 h
United Utilities BURNLEY ROAD (BACUP) CSO River Irwell 0 0 h 84 h
United Utilities Bolton Road CSO River Darwen 0 0 h -
United Utilities Sudellside Street CSO River Darwen 0 0 h -
United Utilities Belgrave Road CSO River Darwen 0 0 h -
United Utilities Woodvale Flats combined sewer overflow (059AF) (BBN0151) River Darwen 0 0 h 35 h
United Utilities New Hall Hey Bridge CSO River Irwell 0 0 h 1 h
United Utilities Lee Road CSO River Irwell 0 0 h 1 h
United Utilities Cowpe Road SSO River Irwell 0 0 h -
United Utilities Greave Clough Drive CSO Greave Clough Via Sws 0 0 h -
United Utilities RAILWAY ROAD / SOUTH STREET CSO Clvrtd Section Of River Darwen 0 0 h -
United Utilities Boothfold Bridge CSO (369DI) Whitewell Brook 0 0 h -
United Utilities Footpath Near Cross Street CSO River Darwen 0 0 h 7 h
United Utilities Station Road (Whitworth) CSO River Spodden 0 0 h -
United Utilities Cranberry Lane CSO River Darwen 0 0 h -
United Utilities Greave Clough Drive CSO Greave Clough Via Sws 0 0 h 2 h
United Utilities TONG LANE / REED STREET CSO Gleave Clough Brook 0 0 h -
United Utilities BELMONT WwTW Eagley Brook 0 0 h -
United Utilities Burnley Road East/Townley Arms CSO Whitewell Brook 0 0 h -
United Utilities Boothfold Bridge CSO (369DI) Whitewell Brook 0 0 h -
United Utilities Burnley Road/Middlegate CSO Limy Water Irwell 0 0 h -
United Utilities Burnley Road East/Whitewall Bottom CSO Whitewell Brook 0 0 h -
United Utilities OPPOSITE 709 BACUP ROAD CSO River Irwell 0 0 h -
United Utilities Queen's Road CSO River Darwen 0 0 h 403 h
United Utilities WELLINGTON HOTEL CSO Culverted River Irwell 0 0 h -
United Utilities TONG LANE / REED STREET CSO Gleave Clough Brook 0 0 h 0 h
United Utilities Queen's Road CSO River Darwen 0 0 h -
United Utilities RAILWAY ROAD / SOUTH STREET CSO Clvrtd Section Of River Darwen 0 0 h -
United Utilities Vale Street River Darwen 0 0 h -
United Utilities REDEARTH ROAD / SUDELL ROAD CSO River Darwen 0 0 h -
United Utilities Sudellside Street CSO River Darwen 0 0 h 773 h

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.