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Bishopthorpe Road CSO: sewage overflow history

Review available Environment Agency annual monitoring returns for Bishopthorpe Road 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	52	74.93	100
2024	65	132.58	100
2023	78	112.33	100
2022	49	42.42	100

Published record details

Reference: WXW00139
Location: Trym - source to conf R Avon (Brist)
Coordinates: 51.49322, -2.60413
Watercourse: Trib Of River Trym Via Sws
Sewerage company: Wessex Water
Asset type: SO on sewer network
Permit reference: 100464
Discharge grid reference: ST5815577315
Reporting years: 2025, 2024, 2023, 2022
Catchment: Trym - source to conf R Avon (Brist)

Location

Bishopthorpe Road CSO
51.49322, -2.60413

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

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