Top of the Poops | Constituency Sewage Map | Colne Valley

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Live data for Colne Valley in 2026

So far this year (as of 10 Sept 2026, 11:30) there has been 4,776 hours of sewage overflows, from 59 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Sewage without rain in Colne Valley

On 4 occasions since December 2024, no rain fell anywhere in Colne Valley for days — and its CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s discharged anyway.

26 Dec 2025 1 at once · 0h 5 Jan 2026 1 at once · 0h 13 Apr 2025 1 at once · 0h

Totals for Colne Valley in 2025

52 Sites polluted by Yorkshire Water

1,512 sewage dumps

8,512 hours duration

That's 11.82 months. On average 4.1 times a day

Change Over Time

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Constituencies near Colne Valley

Waterways in Colne Valley

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Colne Valley in 2025. Sometimes sewage can be being dumped for months at a time.

Reporting refers to how much of the time the monitoring was active. In this constituency 2 of the total 59 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway locations had reporting enabled for less than half the year.

Company	Waterway	Site	Sewage Dumps	Duration (Hours)	Reporting %
Yorkshire Water	River Holme	LONGLANDS ROAD CSO	57	1,087	100
Yorkshire Water	New Mill Dike	SINKING WOOD NO2 CSO	73	1,046	100
Yorkshire Water	Mag Brook	MELTHAM STW	78	1,007	100
Yorkshire Water	River Holme	NEILEY WWTW	55	735	100
Yorkshire Water	Mag Brook	THIRSTIN ROAD NO2 CSO	60	450	100
Yorkshire Water	River Holme	QUEENS SQUARE CSO	62	364	100
Yorkshire Water	River Colne	BARBER ROW NO 2 CSO	72	351	100
Yorkshire Water	Red Lane Dike	POLE MOOR SPS	36	311	100
Yorkshire Water	River Holme	HONLEY HUDDERSFIELD ROAD NO 2	58	304	100
Yorkshire Water	Longwood Brook	LEYMOOR ROAD CSO	76	215	99.9
Yorkshire Water	River Colne	TITANIC MILLS CSO	50	212	100
Yorkshire Water	Stubbin Clough	DOBB LANE NO 2 CSO	39	207	100
Yorkshire Water	River Colne	WOOD BOTTOM CSO	57	203	99.8
Yorkshire Water	No Details	EAST COWICK SEWAGE PUMPING STATION	62	193	97.55
Yorkshire Water	River Colne	BRIDGE ST CSO	45	188	100
Yorkshire Water	Hey Clough	HEY CLOUGH SPS	34	180	99.8
Yorkshire Water	River Holme	CORN MILL NO 2 CSO	35	154	100
Yorkshire Water	Longwood Brook	MILNSBRIDGE (MARKET STREET) CSO	55	125	68.2
Yorkshire Water	New Mill Dike	HOLME BOTTOM CSO	36	110	99.2
Yorkshire Water	River Colne	GORDON TERRACE CSO	29	107	99.7
Yorkshire Water	Meltham Dike	MELTHAM CSO	37	88	68.1
Yorkshire Water	River Holme	TOWNGATE HOLMFIRTH 2 CSO	22	86	99.9
Yorkshire Water	Jackson Bridge Dike	ST GEORGE'S ROAD CSO	23	74	100
Yorkshire Water	Culv'D Hoyle House Brk	CAUSEWAY SIDE TOP CSO	17	67	93.2
Yorkshire Water	River Colne	FACTORY LANE CSO	23	60	87.6
Yorkshire Water	New Mill Dike	NEW MILL LIBRARY CSO	17	52	81.8
Yorkshire Water	Jackson Bridge Dyke	JACKSON BRIDGE NO 2 CSO	19	50	99.8
Yorkshire Water	Hoyle House Brook	STONES LANE/WAINGATE CSO	9	42	100
Yorkshire Water	Meltham Dike	MEAN BRIDGE CSO	20	41	100
Yorkshire Water	River Colne	MORLEY LANE CSO	32	41	100
Yorkshire Water	Grimescar Dike	BURN ROAD CSO	23	38	97.3
Yorkshire Water	Jackson Bridge Dike	SPRING WOOD CSO	14	34	99.9
Yorkshire Water	River Colne	MILNS SHAW LANE NO 2 CSO	20	31	99.7
Yorkshire Water	Culv River Holme	BROCKHOLES LANE CSO	9	29	99.5
Yorkshire Water	River Colne	FERNLEA GROVE CSO	16	28	100
Yorkshire Water	Longwood Brook	DALE STREET CSO	17	27	99
Yorkshire Water	Longwood Brook	LOWER HIRST CSO	13	26	68.2
Yorkshire Water	Culverted Longwood Brook	NEW HEY ROAD CSO	11	19	100
Yorkshire Water	River Colne	BARGATE CSO	8	17	100
Yorkshire Water	Hoyle House Brook	CAUSEWAY SIDE 13 C.S.O	12	17	92.7
Yorkshire Water	River Colne	SCAR LANE CSO	11	15	99.8
Yorkshire Water	River Ribble	SWAN BANK NO 2 CSO	3	13	100
Yorkshire Water	River Colne	BROOK LANE CSO	14	9	99.9
Yorkshire Water	River Holme	HONLEY NEWTOWN NO 2 CSO	18	9	100
Yorkshire Water	River Colne	RAMSDEN MILL CSO	4	8	99.6
Yorkshire Water	Rakes Dyke	HEPWORTH ROAD CSO	6	8	100
Yorkshire Water	River Holme	PICKWICK MILL CSO	1	7	100
Yorkshire Water	River Holme	HONLEY BRIDGE NO 2 CSO	11	4	100
Yorkshire Water	Rakes Dyke	BUTT LANE CSO	10	3	98.7
Yorkshire Water	River Holme	HOLMFIRTH BRIDGE LANE CSO	1	1	99.8
Yorkshire Water	River Colne	COPLEY BANK CSO	1	0	100
Yorkshire Water	River Colne	PICKFORD STREET CSO	1	0	99.8
Yorkshire Water	River Holme	COOPER LANE CSO	0	0	100
Yorkshire Water	Culv River Holme	HONLEY EASTGATE CSO	0	0	98.2
Yorkshire Water	New Mill Dike	HUDDERSFIELD ROAD	0	0	82
Yorkshire Water	New Mill Dike	KIRKBRIDGE LANE CSO	0	0	99.9
Yorkshire Water	Clay Wood Brook	NETTLETON HILL CSO	0	0	40.9
Yorkshire Water	River Holme	THURSTONLAND CSO	0	0	100
Yorkshire Water	Digley Brook	WOODHEAD ROAD CSO	0	0	48.6

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.

Analysing sewage pollution by the Water Industry

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Contains Water UK National Storm Overflow Hub Data CC-BY-SA 4.0 and analysis © 2025 Top-Of-The-Poops

Some data reproduced under Open Government Licence

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