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Hunmanby Sewage Treatment Works - T: sewage overflow history

Review available Environment Agency annual monitoring returns for Hunmanby Sewage Treatment Works - T. 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	23	155.25	99.95
2024	23	122.75	99.8
2023	33	175.75	99.93

Published record details

Reference: YWS01051
Location: Hertford from Source to River Derwent
Coordinates: 54.18509, -0.30928
Watercourse: Trib Of River Hertford
Sewerage company: Yorkshire Water
Asset type: Storm tank at WwTW
Permit reference: QR27/27/0017
Discharge grid reference: TA1043077910
Reporting years: 2025, 2024, 2023
Catchment: Hertford from Source to River Derwent

Location

Hunmanby Sewage Treatment Works - T
54.18509, -0.30928

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.

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