Pendle and Clitheroe - 2025 Sewage

Polluted by sewage 2,321 hours in 2025

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

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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.

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Constituencies near Pendle and Clitheroe

Daily Data

We get information about overflowing CSOs since January 2025. Here is a chart of the last three months of data for Pendle and Clitheroe, 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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Daily data is experimental and data is not guaranteed to be accurate. Please inform us of any issue, we will fix.
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Total Duration (days)
United Utilities Chatburn (Ribble Lane) PS Chatburn Brook 59 549 h 53m 22.88
United Utilities Colne WwTW Colne Water 54 382 h 45m 15.92
United Utilities North West of Henthorn Road Bridge (EO for Lower Moor PS) Pendleton Brook 51 217 h 37m 9.04
United Utilities Colne WwTW Colne Water 18 134 h 32m 5.58
United Utilities Chatburn (Ribble Lane) PS Chatburn Brook 12 129 h 17m 5.38
United Utilities Fleet Street CSO Walverden Water 35 104 h 1m 4.33
United Utilities Clitheroe Street CSO Pendleton Brook 27 103 h 8m 4.29
United Utilities BARNOLDSWICK WwTW Stock Beck 15 85 h 37m 3.54
United Utilities Netherfield Road CSO Walverden Water 38 84 h 4m 3.5
United Utilities Longworth Road/Railway Viaduct CSO River Calder 29 64 h 32m 2.67
United Utilities North West of Henthorn Road Bridge (EO for Lower Moor PS) Pendleton Brook 9 57 h 20m 2.38
United Utilities 11 NORTH PARK AVENUE CSO Pendle Water 8 53 h 6m 2.21
United Utilities Rear of 273 Regent Street CSO Swinden Clough 9 46 h 52m 1.92
United Utilities BARNOLDSWICK WwTW Stock Beck 8 42 h 9m 1.75
United Utilities Longworth Road/Railway Viaduct CSO River Calder 10 40 h 22m 1.67
United Utilities Lomeshaye Way CSO Pendle Water 12 36 h 21m 1.5
United Utilities Colne Refuse Transfer Station CSO (Site ID 322YC) (PEN0059) Colne Water 10 33 h 20m 1.38
United Utilities Fleet Street CSO Walverden Water 12 32 h 32m 1.33
United Utilities Barrowford CSO Pendle Water 12 19 h 12m 0.79
United Utilities Simonstone Lane CSO River Calder 5 16 h 20m 0.67
United Utilities Chapel House Road CSO Walverden Water 24 15 h 8m 0.62
United Utilities Chapel House Road CSO(32014) (PEN0084) Walverden Water 7 14 h 43m 0.58
United Utilities Hey Street CSO Hendon Brook 6 9 h 44m 0.38
United Utilities Clitheroe Street CSO Pendleton Brook 6 8 h 2m 0.33
United Utilities Laneshawbridge School Lane Combined Sewer Overflow Colne Water 5 7 h 32m 0.29
United Utilities Netherfield Road CSO Walverden Water 8 6 h 46m 0.25
United Utilities Lomeshaye Way CSO Pendle Water 4 4 h 58m 0.17
United Utilities Walverden Park CSO Walverden Water 4 4 h 17m 0.17
United Utilities Sabden CSO Sabden Brook 6 3 h 44m 0.12
United Utilities 11 NORTH PARK AVENUE CSO Pendle Water 4 2 h 33m 0.08
United Utilities Dam Head Bridge CSO Butts Beck 7 2 h 30m 0.08
United Utilities Near Butts Beck Footpath CSO Butts Beck 4 2 h 4m 0.08
United Utilities Reedyford Road CSO Culvrtd Walverden Wtr 3 1 h 44m 0.04
United Utilities Colne Refuse Transfer Station CSO (Site ID 322YC) (PEN0059) Colne Water 2 1 h 20m 0.04
United Utilities Barrowford CSO Pendle Water 1 1 h 5m 0.04
United Utilities Rear of 273 Regent Street CSO Swinden Clough 1 1 h 4m 0.04
United Utilities Calf Hall Road CSO Calf Hall Beck 2 1 h 4m 0.04
United Utilities Chapel House Road CSO Walverden Water 2 0 h 18m 0
United Utilities ADJ POLICE STATION KING STREET CSO Pendleton Brook By Sws 1 0 h 2m 0
United Utilities BRADLEY ROAD CSO Walverden Water 0 0 h 0
United Utilities EDWARD STREET CSO Swinden Clough 0 0 h 0
United Utilities Oxford Road/Hollins Road CSO Swinden Clough 0 0 h 0
United Utilities BRADLEY ROAD CSO Walverden Water 0 0 h 0
United Utilities Oxford Road/Hollins Road CSO Swinden Clough 0 0 h 0
United Utilities Laneshawbridge School Lane Combined Sewer Overflow Colne Water 0 0 h 0
United Utilities Near Butts Beck Footpath CSO Butts Beck 0 0 h 0
United Utilities EDWARD STREET CSO Swinden Clough 0 0 h 0
United Utilities ADJ POLICE STATION KING STREET CSO Pendleton Brook By Sws 0 0 h 0
United Utilities Walverden Park CSO Walverden Water 0 0 h 0
United Utilities Hey Street CSO Hendon Brook 0 0 h 0
United Utilities Simonstone Lane CSO River Calder 0 0 h 0
United Utilities Cornmill Cottages CSO Butts Beck 0 0 h 0
United Utilities Cornmill Cottages CSO Butts Beck 0 0 h 0
United Utilities Calf Hall Road CSO Calf Hall Beck 0 0 h 0
United Utilities Chapel House Road CSO(32014) (PEN0084) Walverden Water 0 0 h 0
United Utilities CRAWFORD STREET (Nelson) CSO Walverden Water 0 0 h 0
United Utilities Sabden CSO Sabden Brook 0 0 h 0
United Utilities Reedyford Road CSO Culvrtd Walverden Wtr 0 0 h 0
United Utilities Dam Head Bridge CSO Butts Beck 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.

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© 2020-2025 Top-Of-The-Poops CC-BY-SA 4.0,
© Openstreetmap contributors, Contains OS data © Crown copyright and database right 2021-2025,
Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

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