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Southwell Sewage Treatment Works: sewage overflow history

Review available Environment Agency annual monitoring returns for Southwell 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

151

2023

141

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	58	639.15	99.97
2024	141	1,774.13	88.97
2023	151	2,115.71	99.7

Published record details

Reference: SVT02123
Location: Trent from Soar to The Beck
Coordinates: 53.05519, -0.89428
Watercourse: River Trent
Sewerage company: Severn Trent Water
Asset type: Storm tank at WwTW
Permit reference: NPSWQD008782
Discharge grid reference: SK7420951453
Reporting years: 2025, 2024, 2023
Catchment: Trent from Soar to The Beck

Location

Southwell Sewage Treatment Works
53.05519, -0.89428

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

Balderton Sewage Treatment Works2.3 km Farndon - Chapel Lane (SSO)2.7 km Averham - Church Lane Sps3.8 km Farndon Sewage Treatment Works3.9 km Southwell - Newark Road CSO4.1 km

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