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Twyning Sewage Treatment Works: sewage overflow history

Review available Environment Agency annual monitoring returns for Twyning 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

149

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	49	533.39	99.99
2024	149	1,882.69	99.1
2023	91	1,339.76	85.8
2020	88	1,452.57	99.79

Published record details

Reference: SVT02361
Location: Avon conf Workman Br, Evesham to conf R Severn
Coordinates: 52.03072, -2.13475
Watercourse: Tributary Of River Avon
Sewerage company: Severn Trent Water
Asset type: Storm tank at WwTW
Permit reference: S/17/25353/R
Discharge grid reference: SO9085236932
Reporting years: 2025, 2024, 2023, 2020
Catchment: Avon conf Workman Br, Evesham to conf R Severn

Location

Twyning Sewage Treatment Works
52.03072, -2.13475

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

Moretons Lane CSO1.9 km Upper Strensham Pumping Station3 km Kemerton Pumping Station3.5 km Lower Mill Farm CSO3.6 km Eckington Pumping Station4 km

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