It's a Dirty Business

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

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.