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Spen Valley

Polluted by sewage 476 times in 2025 lasting 2,201 hours

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

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Live data for Spen Valley in 2026

So far this year (as of 18 May 2026, 12:00) there has been 813 hours of sewage overflows, from 23 CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s

Totals for Spen Valley in 2025

20 Sites polluted by Yorkshire Water
476 sewage dumps
2,201 hours duration
That's 3.06 months. On average 1.3 times a day

Change Over Time

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Waterways in Spen Valley

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Pollution Summary 2025

Here are all the reported sewage overflow totals for Spen 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 all the declared CSO Combined Sewage Overflow - a device that, when operating, pours combined rainwater & sewage into a waterway s appeared to have monitoring enabled for more than 50% of the year

Company Waterway Site Sewage Dumps Duration (Hours) Reporting %
Yorkshire Water River Spen LISTING MILL FARM CSO 74 603 100
Yorkshire Water River Calder And River Spen SPENBOROUGH SPS STORM TANK SITE 77 563 100
Yorkshire Water River Spen ST PEG LANE CSO 39 209 100
Yorkshire Water River Spen HECKMONDWIKE NO 2 CSO 23 199 100
Yorkshire Water River Spen MORRISONS CAR PARK CSO 43 160 53.3
Yorkshire Water River Colne BOG GREEN LANE 54 149 86.7
Yorkshire Water Nutter Beck BIRKENSHAW CSO 10 86 100
Yorkshire Water Lodge Beck EAST BIERLEY CSO 28 61 100
Yorkshire Water Hunsworth Beck NORTH BIERLEY CSO 12 39 100
Yorkshire Water Culverted Spen River HIGH STREET HECKMONDWIKE NO 2 CSO 35 38 99.8
Yorkshire Water River Spen CHAPEL LANE NO 2 CSO 26 27 100
Yorkshire Water Hunsworth Upper Lane Beck HUNSWORTH LANE NO 2 CSO 10 22 100
Yorkshire Water Wormalds Drain OLD LANE NO 2 CSO 12 11 100
Yorkshire Water Smithies Beck BIRSTALL CSO 12 10 100
Yorkshire Water River Calder NEWGATE CSO 1 8 100
Yorkshire Water Syke Beck HIGHTOWN ROAD CSO 13 6 100
Yorkshire Water High Royds Beck RAIKES LANE CSO 2 2 93.8
Yorkshire Water Helliwell Syke HELLIWELL SYKE CSO 1 2 100
Yorkshire Water River Spen WHITEHALL ROAD CSO 3 0 100
Yorkshire Water River Spen BALME ROAD NO 2 CSO 1 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.

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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 ยฉ 2025 Top-Of-The-Poops

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