Pendle and Clitheroe - 2025 Sewage

Polluted by sewage 2,712 hours in 2025 , monitoring offline 853 hours , potential overflows 106 hours

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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 Pendle and Clitheroe 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.

Totals for Pendle and Clitheroe in 2025

Sewage2,712 hours
Monitoring offline853 hours
Potential pollution106 hours
Storm overflows62

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Daily Data

Jan - 705 hours , 18 potential
Feb - 36 hours , 25 offline
Mar - 2 hours , 0 offline
Apr - 0 hours , 2 offline
May - 53 hours , 91 offline
Jun - 124 hours , 40 potential
Jul - 93 hours , 102 offline
Aug - 12 hours , 22 potential
Sept - 558 hours , 20 potential
Oct - 347 hours , 3 potential
Nov - 358 hours , 0 potential
Dec - 419 hours , 7 offline
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
United Utilities Chatburn (Ribble Lane) PS Chatburn Brook 58 526h 19m 352 h
United Utilities Colne WwTW Colne Water 54 347h 45m 35 h
Yorkshire Water EARBY/STW Earby Beck 54 234h 15m 40 h
United Utilities North West of Henthorn Road Bridge (EO for Lower Moor PS) Pendleton Brook 51 218h 13m 0 h
United Utilities Colne WwTW Colne Water 18 134h 32m 0 h
United Utilities BARNOLDSWICK WwTW Stock Beck 17 130h 39m 25 h
United Utilities Chatburn (Ribble Lane) PS Chatburn Brook 12 129h 17m -
Yorkshire Water EARBY/STW Earby Beck 41 105h 27m -
United Utilities Fleet Street CSO Walverden Water 35 104h 1m -
United Utilities Clitheroe Street CSO Pendleton Brook 27 103h 8m 0 h
United Utilities Netherfield Road CSO Walverden Water 38 84h 4m -
United Utilities Longworth Road/Railway Viaduct CSO River Calder 29 64h 32m 10 h
Yorkshire Water FOULRIDGE/CSO County Dyke 40 64h 1m -
United Utilities North West of Henthorn Road Bridge (EO for Lower Moor PS) Pendleton Brook 9 57h 20m -
United Utilities 11 NORTH PARK AVENUE CSO Pendle Water 8 53h 6m 130 h
United Utilities Rear of 273 Regent Street CSO Swinden Clough 9 46h 52m -
United Utilities BARNOLDSWICK WwTW Stock Beck 8 42h 9m -
United Utilities Longworth Road/Railway Viaduct CSO River Calder 10 40h 22m -
United Utilities Lomeshaye Way CSO Pendle Water 12 36h 21m -
United Utilities Colne Refuse Transfer Station CSO (Site ID 322YC) (PEN0059) Colne Water 10 33h 20m -
United Utilities Fleet Street CSO Walverden Water 12 32h 32m -
United Utilities Barrowford CSO Pendle Water 12 19h 43m 158 h
United Utilities Simonstone Lane CSO River Calder 5 16h 20m -
United Utilities Chapel House Road CSO Walverden Water 24 15h 8m -
United Utilities Chapel House Road CSO(32014) (PEN0084) Walverden Water 7 14h 43m -
United Utilities Hey Street CSO Hendon Brook 6 9h 44m 23 h
United Utilities Clitheroe Street CSO Pendleton Brook 6 8h 2m -
United Utilities Laneshawbridge School Lane Combined Sewer Overflow Colne Water 5 7h 32m 3 h
United Utilities Netherfield Road CSO Walverden Water 8 6h 46m -
United Utilities Lomeshaye Way CSO Pendle Water 4 4h 58m -
United Utilities Walverden Park CSO Walverden Water 4 4h 17m -
United Utilities Sabden CSO Sabden Brook 6 3h 44m 126 h
United Utilities 11 NORTH PARK AVENUE CSO Pendle Water 4 2h 33m -
United Utilities Dam Head Bridge CSO Butts Beck 7 2h 30m 24 h
United Utilities Near Butts Beck Footpath CSO Butts Beck 4 2h 4m 0 h
United Utilities Reedyford Road CSO Culvrtd Walverden Wtr 3 1h 44m -
United Utilities Colne Refuse Transfer Station CSO (Site ID 322YC) (PEN0059) Colne Water 2 1h 20m -
United Utilities Calf Hall Road CSO Calf Hall Beck 2 1h 4m 0 h
United Utilities Rear of 273 Regent Street CSO Swinden Clough 1 1h 4m -
United Utilities Barrowford CSO Pendle Water 1 0h 39m 19 h
United Utilities Chapel House Road CSO Walverden Water 2 0h 18m 1 h
United Utilities ADJ POLICE STATION KING STREET CSO Pendleton Brook By Sws 1 0h 8m 3 h
United Utilities Oxford Road/Hollins Road CSO Swinden Clough 0 0h -
United Utilities Reedyford Road CSO Culvrtd Walverden Wtr 0 0h -
United Utilities Simonstone Lane CSO River Calder 0 0h -
United Utilities Sabden CSO Sabden Brook 0 0h -
United Utilities Chapel House Road CSO(32014) (PEN0084) Walverden Water 0 0h -
United Utilities EDWARD STREET CSO Swinden Clough 0 0h -
United Utilities BRADLEY ROAD CSO Walverden Water 0 0h 1 h
United Utilities BRADLEY ROAD CSO Walverden Water 0 0h -
United Utilities Cornmill Cottages CSO Butts Beck 0 0h 0 h
United Utilities Calf Hall Road CSO Calf Hall Beck 0 0h -
United Utilities Laneshawbridge School Lane Combined Sewer Overflow Colne Water 0 0h -
United Utilities CRAWFORD STREET (Nelson) CSO Walverden Water 0 0h -
United Utilities EDWARD STREET CSO Swinden Clough 0 0h 0 h
United Utilities Oxford Road/Hollins Road CSO Swinden Clough 0 0h -
United Utilities Walverden Park CSO Walverden Water 0 0h -
United Utilities Dam Head Bridge CSO Butts Beck 0 0h -
United Utilities Cornmill Cottages CSO Butts Beck 0 0h 0 h
United Utilities ADJ POLICE STATION KING STREET CSO Pendleton Brook By Sws 0 0h -
United Utilities Near Butts Beck Footpath CSO Butts Beck 0 0h -
United Utilities Hey Street CSO Hendon Brook 0 0h -

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

Annual figures up to and including 2025 come from official water company returns. The 2026 figure is our own estimate, derived continuously from the companies' live data feeds.

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.