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Long Street CSO: sewage overflow history

Review available Environment Agency annual monitoring returns for Long Street CSO. 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

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	0	0	100
2024	0	0	99.39
2023	1	0.2	99.91
2022	3	0.53	99.99

Published record details

Reference: WXW00641
Location: Yeo
Coordinates: 50.94532, -2.51114
Watercourse: River Yeo Via Sws
Sewerage company: Wessex Water
Asset type: SO on sewer network
Permit reference: 070886
Discharge grid reference: ST6418716334
Reporting years: 2025, 2024, 2023, 2022
Catchment: Yeo

Location

Long Street CSO
50.94532, -2.51114

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

Newland Combined Sewer Overflow0 km 63 Cheap Street CSO0.1 km Ludborne Road CSO0.1 km Thorn Bank CSO0.1 km Abbey Road Combined Sewer Overflow0.5 km

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