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Rolleston Road CSO 05029 Bbn0041: sewage overflow history

Review available Environment Agency annual monitoring returns for Rolleston Road CSO 05029 Bbn0041. 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

2021

2023

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	12	18.82	99.9
2024	20	19.42	99.89
2023	25	27.91	99.99
2021	19	13.34	99.99

Published record details

Reference: UUP02074
Location: Blakewater
Coordinates: 53.74455, -2.50451
Watercourse: The River Blakewater, a tributary of the River Darwen
Sewerage company: United Utilities
Asset type: SO on sewer network
Permit reference: 017180641
Discharge grid reference: SD6682427693
Reporting years: 2025, 2024, 2023, 2021
Catchment: Blakewater

Location

Rolleston Road CSO 05029 Bbn0041
53.74455, -2.50451

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

Witton Tanks CSO0.2 km Manor Road CSO (052Er)0.2 km Apple Street CSO0.3 km Addison Close CSO0.7 km Fielden Street CSO0.7 km

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