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Cold Hiendley STW: sewage overflow history

Review available Environment Agency annual monitoring returns for Cold Hiendley STW. Compare reported spill counts, total duration and monitor operation by year, with source details and gaps in the series identified.

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Annual monitoring returns

2023

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	41	328.75	100
2024	63	433.75	99.56
2023	79	1,219.25	52.69

Published record details

Reference: YWS00784
Location: Owler Beck from Source to River Calder
Coordinates: 53.62609, -1.44188
Watercourse: Cold Hiendley Reservoir
Sewerage company: Yorkshire Water
Asset type: Storm tank at WwTW
Permit reference: 431
Discharge grid reference: SE3701014540
Reporting years: 2025, 2024, 2023
Catchment: Owler Beck from Source to River Calder

Location

Cold Hiendley STW
53.62609, -1.44188

Understanding annual storm overflow figures

The Environment Agency's annual returns report storm overflow monitoring information supplied by water companies. Spill counts use the regulatory 12/24-hour block method, so a counted spill is not necessarily a single uninterrupted discharge. Duration is the reported total time in spill, rather than the volume of sewage discharged. Monitor operation indicates the percentage of the reporting period for which the monitor operated. Missing values, incomplete monitoring and changes in recorded outlet details can affect comparisons between years. These annual figures describe historical reporting periods, not live discharge conditions or the cause of sewage problems at an individual property.

Nearby records

109 Station Road1.2 km Notton Sps2.3 km Bleakley Lane No 2 CSO2.5 km Meadow Crescent CSO3.1 km Shay Lane Sewage Pumping Station3.3 km

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