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Kilsby Sewage Treatment Works: sewage overflow history

Review available Environment Agency annual monitoring returns for Kilsby Sewage Treatment Works. 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

2020

2021

2022

2023

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	12	95.7	99.72
2024	37	257.46	99.99
2023	35	438.7	91.6
2022	19	141.98	99.88
2021	34	454.36	99.53
2020	22	173.95	99.69

Published record details

Reference: SVT01261
Location: Rains Bk - source to conf R Leam
Coordinates: 52.33691, -1.18828
Watercourse: Rains Brook
Sewerage company: Severn Trent Water
Asset type: Storm tank at WwTW
Permit reference: S/12/26563/R
Discharge grid reference: SP5540471291
Reporting years: 2025, 2024, 2023, 2022, 2021, 2020
Catchment: Rains Bk - source to conf R Leam

Location

Kilsby Sewage Treatment Works
52.33691, -1.18828

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

Crick Pumping Station3 km Ashby St.Ledgers Sps3.7 km Hillmorton Storm Tanks4.1 km Braunston STW6.1 km Lilbourne Sewage Treatment Works6.2 km

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