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Hanslope STW: sewage overflow history

Review available Environment Agency annual monitoring returns for Hanslope 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

2022

2023

152

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	69	983.83	99.06
2024	152	2,515.33	95.64
2023	88	1,360.68	100
2022	32	409.5	100
2021	Not reported	Not reported	Not reported

Published record details

Reference: AWS00554
Location: Tove (DS Greens Norton)
Coordinates: 52.11823, -0.84106
Watercourse: River Tove
Sewerage company: Anglian Water
Asset type: Storm tank at WwTW
Permit reference: AW1NF1066
Discharge grid reference: SP7945047290
Reporting years: 2025, 2024, 2023, 2022, 2021
Catchment: Tove (DS Greens Norton)

Location

Hanslope STW
52.11823, -0.84106

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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