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Swanwick Sewage Treatment Works: sewage overflow history

Review available Environment Agency annual monitoring returns for Swanwick 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

2023

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	41	165.44	99.57
2024	11	18.56	95.95
2023	8	42.67	100
2020	86	1,222.78	99.98

Published record details

Reference: SVT02264
Location: Amber from Alfreton Brook to Derwent
Coordinates: 53.06637, -1.40110
Watercourse: Tributary Of Hartshay Brook
Sewerage company: Severn Trent Water
Asset type: Storm tank at WwTW
Permit reference: T/41/45656/R
Discharge grid reference: SK4022952293
Reporting years: 2025, 2024, 2023, 2020
Catchment: Amber from Alfreton Brook to Derwent

Location

Swanwick Sewage Treatment Works
53.06637, -1.40110

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

Outside Goodwin CSO0.3 km Swanwick - Hickton Road Sps0.3 km Padley Hall CSO0.9 km Toll Road Combined Sewer Overflow0.9 km Pentrich Sps1.2 km

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