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Dewsbury

Polluted by sewage 590 times in 2025 lasting 2,596 hours

Monitoring fell below 50% in some locations so could be more

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Totals for Dewsbury in 2025

28 Sites polluted by Yorkshire Water

590 sewage dumps

2,596 hours duration

That's 3.61 months. On average 1.6 times a day

Change Over Time

Constituency for Dewsbury

Nearby Constituencies

Waterways in Dewsbury

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Dewsbury 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 place 1 of the total 33 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 Calder And River Spen	SPENBOROUGH SPS STORM TANK SITE	77	563	100
Yorkshire Water	River Calder	MITCHELL LAITHES WWTW	61	523	100
Yorkshire Water	Calder	EAST COWICK SEWAGE PUMPING STATION	41	224	99.6
Yorkshire Water	River Spen	HECKMONDWIKE NO 2 CSO	23	199	100
Yorkshire Water	Batley Beck	WARWICK ROAD NO2 CSO	69	187	98.2
Yorkshire Water	River Calder	THORNHILL DEWSBURY NO1 CSO	36	173	75.2
Yorkshire Water	River Calder	RAVENS HUDDERSFIELD RD CSO	27	121	93.6
Yorkshire Water	Pildacre Mill Beck	PILDACRE LANE CSO	28	94	100
Yorkshire Water	River Spen	DEWSBURY MOOR CSO	38	86	100
Yorkshire Water	River Calder	FIR COTTAGE CSO	7	69	100
Yorkshire Water	River Calder	THORNHILL SYPHON CSO	16	66	100
Yorkshire Water	Culverted River Calder	BREWERY LANE CSO	14	50	100
Yorkshire Water	River Calder	RAILWAY STREET (B TO D) CSO	13	49	58
Yorkshire Water	Culverted Spen River	HIGH STREET HECKMONDWIKE NO 2 CSO	35	38	99.8
Yorkshire Water	Smithy Brook	EAST COWICK SEWAGE PUMPING STATION	3	33	26.6
Yorkshire Water	Hey Beck	HAIGH HALL CSO	14	30	100
Yorkshire Water	River Spen	CHAPEL LANE NO 2 CSO	26	27	100
Yorkshire Water	Dewsbury Beck	WOOD STREET COMBINED SEWER OVERFLOW	11	20	99.8
Yorkshire Water	Batley Carr Dyke Culverted	UPPER ROAD CSO	17	13	100
Yorkshire Water	Calder	COMBS HILL CSO	14	11	69.4
Yorkshire Water	Spen River	SCOUTHILL CSO	1	5	100
Yorkshire Water	River Calder	SOUTH STREET CSO	7	2	100
Yorkshire Water	River Calder	CALDER BANK ROAD CSO	3	2	84.3
Yorkshire Water	Bushy Beck	GAWTHORPE MAIN STREET CSO	3	1	100
Yorkshire Water	Varies With Outlet	EAST COWICK SEWAGE PUMPING STATION	2	0	88
Yorkshire Water	River Calder	THORNHILL PARK AVENUE CSO	1	0	88.6
Yorkshire Water	Greenhill Dike Culverted	BATLEY GRANGE ROAD CSO	2	0	96.1
Yorkshire Water	Chickenley Beck	SYKE ING NO 2 CSO	1	0	98.5
Yorkshire Water	Batley Beck	BATLEY MOUNT STREET CSO	0	0	68.8
Yorkshire Water	River Calder	FIDDLERS HILL	0	0	100
Yorkshire Water	Howroyd Beck	WHITLEY ROAD STORM BALANCING TANK	0	0	100
Yorkshire Water	River Spen	BATLEY ROAD NO 2 CSO	0	0	97.5
Yorkshire Water	Unna. Cul. Of Spen River	HECK CEMETERY ROAD NO 2 CSO	0	0	100

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.

Analysing sewage pollution by the Water Industry

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