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Hanham High Street CSO: sewage overflow history

Review available Environment Agency annual monitoring returns for Hanham High 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	99.03
2023	0	0	99.75
2022	0	0	100

Published record details

Reference: WXW00499
Location: Bristol Avon (By Bk to Netham Weir)
Coordinates: 51.44746, -2.53530
Watercourse: River Avon (Via Sws)
Sewerage company: Wessex Water
Asset type: SO on sewer network
Permit reference: 101758
Discharge grid reference: ST6289672188
Reporting years: 2025, 2024, 2023, 2022
Catchment: Bristol Avon (By Bk to Netham Weir)

Location

Hanham High Street CSO
51.44746, -2.53530

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

Polly Barnes Hill CSO0 km Lower Hanham Road CSO0 km Footshill Road CSO0 km Not Applicable0 km Not Applicable0 km

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