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Colne Valley - 2025 Sewage

Polluted by sewage 6,534 hours in 2025 , monitoring offline 34,761 hours

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

Which Year?

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View Annual Sewage Data

You're looking at the totals that we have calculated for sewage in Colne Valley 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 - 1,497 hours , 1,313 offline
Feb - 172 hours , 1,142 offline
Mar - 0 hours , 1,264 offline
Apr - 4 hours , 1,745 offline
May - 2 hours , 2,852 offline
Jun - 3 hours , 5,525 offline
Jul - 34 hours , 5,266 offline
Aug - 2 hours , 5,208 offline
Sept - 487 hours , 3,524 offline
Oct - 304 hours , 3,040 offline
Nov - 2,023 hours , 2,241 offline
Dec - 2,001 hours , 1,588 offline
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Totals so far

Company Site Name Receiving Waterway Overflow Days Total Duration (hours) Offline/Potential Pollution
Yorkshire Water LONGLANDS ROAD/NO 2 CSO River Holme 52 992h 49m -
Yorkshire Water SINKING WOOD/NO 2 CSO New Mill Dike 71 922h 3m -
Yorkshire Water MELTHAM/STW Mag Brook 53 610h -
Yorkshire Water NEILEY/NO 2 STW River Holme 39 482h 12m -
Yorkshire Water QUEENS SQUARE/CSO River Holme 47 355h -
Yorkshire Water THIRSTIN ROAD/NO 2 CSO Mag Brook 50 348h 51m -
Yorkshire Water BARBER ROW/NO 2 CSO River Colne 58 299h 11m -
Yorkshire Water HONLEY HUDDSFLD RD/2 CSO River Holme 49 260h 29m -
Yorkshire Water LOWER HIRST/CSO Longwood Brook 18 199h 43m 2,217 h
Yorkshire Water TITANIC MILLS/CSO River Colne 44 179h 52m -
Yorkshire Water LEYMOOR ROAD/CSO Longwood Brook 55 168h 23m -
Yorkshire Water HEY CLOUGH/CSO Hey Clough 29 155h -
Yorkshire Water DOBB LANE/NO 2 CSO Stubbin Clough 29 153h 35m -
Yorkshire Water WOOD BOTTOM/CSO River Colne 48 147h 25m -
Yorkshire Water SPA MILLS BRIDGE ST/CSO River Colne 38 146h 49m -
Yorkshire Water CORN MILL/NO 2 CSO River Holme 30 120h -
Yorkshire Water MILNSBRIDGE/CSO Longwood Brook 41 91h 51m 2,730 h
Yorkshire Water GORDON TERRACE/CSO River Colne 24 88h 5m -
Yorkshire Water MELTHAM/CSO Meltham Dike 36 72h -
Yorkshire Water HOLME BOTTOM/CSO New Mill Dike 37 67h 34m 1,464 h
Yorkshire Water TOWNGATE HOLMFIRTH/2 CSO River Holme 18 65h 16m -
Yorkshire Water NEW MILL LIBRARY/CSO New Mill Dike 14 63h 42m 2,486 h
Yorkshire Water DALE STREET/CSO Longwood Brook 13 54h 58m -
Yorkshire Water BROCKHOLES LANE/CSO Culv River Holme 9 48h 6m 3,951 h
Yorkshire Water POLE MOOR/CSO Red Lane Dike 20 48h 5m -
Yorkshire Water ST GEORGES ROAD/NO 2 CSO Jackson Bridge Dike 11 41h 47m -
Yorkshire Water CAUSEWAY SIDE 12/CSO Culv'D Hoyle House Brk 9 38h 51m 200 h
Yorkshire Water BUTT LANE/CSO Rakes Dyke 33 37h 31m 23 h
Yorkshire Water JACKSON BRIDGE/NO 2 CSO Jackson Bridge Dyke 15 35h 54m -
Yorkshire Water HONLEY BRIDGE/NO 2 CSO River Holme 6 26h 34m -
Yorkshire Water FACTORY LANE/CSO River Colne 11 26h 6m 752 h
Yorkshire Water STONES LANE WAINGATE/CSO Hoyle House Brook 7 24h 38m -
Yorkshire Water MEAN BRIDGE/CSO Meltham Dike 13 23h 2m -
Yorkshire Water BURN ROAD/CSO Grimescar Dike 20 22h 39m -
Yorkshire Water MILNS SHAW LANE/NO 2 CSO River Colne 12 20h 55m -
Yorkshire Water RAMSDEN MILL/CSO River Colne 14 17h 40m -
Yorkshire Water CAUSEWAY SIDE 13/CSO Hoyle House Brook 10 15h 44m -
Yorkshire Water SCAR LANE/CSO River Colne 9 15h 30m -
Yorkshire Water SWAN BANK/NO 2 CSO River Ribble 3 8h 11m -
Yorkshire Water BARGATE/NO 2 CSO River Colne 6 7h 24m -
Yorkshire Water NEW HEY ROAD/CSO Culverted Longwood Brook 6 6h 54m -
Yorkshire Water FERNLEA GROVE/CSO River Colne 8 6h 17m -
Yorkshire Water SPRING WOOD/CSO Jackson Bridge Dike 9 5h 21m -
Yorkshire Water HONLEY NEWTOWN/NO 2 CSO River Holme 9 4h 21m -
Yorkshire Water HEPWORTH ROAD/CSO Rakes Dyke 3 3h 27m -
Yorkshire Water MORLEY LANE/CSO River Colne 5 2h 11m 1,015 h
Yorkshire Water HOLMFIRTH BRIDGE LN/CSO River Holme 2 1h 58m 3,617 h
Yorkshire Water GOLCAR BROOK LANE/CSO River Colne 1 0h 15m -
Yorkshire Water PICKFORD STREET/NO 2 CSO River Colne 0 0h 2,284 h
Yorkshire Water KIRKBRIDGE LANE/CSO New Mill Dike 0 0h -
Yorkshire Water PENISTONE RD NEW MILL/CSO New Mill Dike 0 0h -
Yorkshire Water HOLMBRIDGE MILL/CSO Digley Brook 0 0h -
Yorkshire Water HONLEY EASTGATE/CSO Culv River Holme 0 0h -
Yorkshire Water NETTLETON HILL/CSO Clay Wood Brook 0 0h 5,410 h
Yorkshire Water COOPER LANE/NO 2 CSO River Holme 0 0h -
Yorkshire Water PICKWICK MILL/CSO River Holme 0 0h -
Yorkshire Water COPLEY BANK/CSO River Colne 0 0h -
Yorkshire Water THURSTONLAND/CSO River Holme 0 0h -
Yorkshire Water HOLYWELL MANCH ROAD/CSO Tbc When Permit Issued 0 0h 8,608 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

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.