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St Annes Terrace CSO: sewage overflow history

Review available Environment Agency annual monitoring returns for St Annes Terrace 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	19	28.67	100
2024	32	71.2	95.95
2023	30	69.5	99.59
2022	16	15.2	99.75

Published record details

Reference: WXW01035
Location: Brislington Bk - source to conf R Avon (Brist)
Coordinates: 51.44577, -2.54334
Watercourse: Brislington Brook
Sewerage company: Wessex Water
Asset type: SO on sewer network
Permit reference: 100584/CS/01
Discharge grid reference: ST6233672005
Reporting years: 2025, 2024, 2023, 2022
Catchment: Brislington Bk - source to conf R Avon (Brist)

Location

St Annes Terrace CSO
51.44577, -2.54334

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

Not Applicable0.6 km Not Applicable0.6 km Not Applicable0.6 km Polly Barnes Hill CSO0.6 km Hanham High Street CSO0.6 km

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