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Heywood Road CSO 091Yz: sewage overflow history

Review available Environment Agency annual monitoring returns for Heywood Road CSO 091Yz. 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

2022

2023

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	0	0	99.62
2024	2	0.6	99.12
2023	6	1.7	100
2022	0	0	97.11
2021	3	0.97	100

Published record details

Reference: UUP00952
Location: Irwell (Croal to Irk)
Coordinates: 53.53172, -2.27438
Watercourse: Prestwich Clough Via Clvrt
Sewerage company: United Utilities
Asset type: SO on sewer network
Permit reference: 016993905
Discharge grid reference: SD8191003931
Reporting years: 2025, 2024, 2023, 2022, 2021
Catchment: Irwell (Croal to Irk)

Location

Heywood Road CSO 091Yz
53.53172, -2.27438

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

Hampden Road CSO 091Xv Bry00410 km The Crescent CSO 091Ej0.3 km Bury New Road CSO0.6 km Prestwich Clough CSO 090340.8 km Clifton Rd Leach St CSO 091Kq1.3 km

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