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Monkton Park Offices CSO: sewage overflow history

Review available Environment Agency annual monitoring returns for Monkton Park Offices 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	6	21.2	100
2024	19	96.83	99.55
2023	16	75.9	99.75
2022	14	56	100

Published record details

Reference: WXW00749
Location: Avon (Brist) conf R Marden to conf Semington Bk
Coordinates: 51.46065, -2.11530
Watercourse: River Avon
Sewerage company: Wessex Water
Asset type: SO on sewer network
Permit reference: 102551
Discharge grid reference: ST9208673526
Reporting years: 2025, 2024, 2023, 2022
Catchment: Avon (Brist) conf R Marden to conf Semington Bk

Location

Monkton Park Offices CSO
51.46065, -2.11530

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 Applicable0.2 km CSO O/S 29 High Street0.2 km Dallas Road Combined Sewer Overflow0.4 km Charter Road CSO0.5 km Mary Street Combined Sewer Overflow0.5 km

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