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Hey Street (Playground) CSO (32017): sewage overflow history

Review available Environment Agency annual monitoring returns for Hey Street (Playground) CSO (32017). 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	8	9.97	94.44
2024	5	9.24	99.99
2023	0	0	100
2022	11	9.58	99.96
2021	39	519.56	99.98

Published record details

Reference: UUP00949
Location: Walverden Water
Coordinates: 53.84023, -2.20725
Watercourse: Hendon Brook
Sewerage company: United Utilities
Asset type: SO on sewer network
Permit reference: 017180621
Discharge grid reference: SD8646038240
Reporting years: 2025, 2024, 2023, 2022, 2021
Catchment: Walverden Water

Location

Hey Street (Playground) CSO (32017)
53.84023, -2.20725

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

Bradley Road CSO (328N5)0.3 km Crawford Street (Nelson) CSO 321P30.3 km Reedyford Rd CSO (32020)0.3 km Fleet Street0.6 km Chapel House Road (32014) CSO0.7 km

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