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Wrenbury Wastewater Treatment Works: sewage overflow history

Review available Environment Agency annual monitoring returns for Wrenbury Wastewater Treatment Works. 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	12	28.38	99.81
2024	24	94.75	99.94
2023	14	37.25	100
2022	12	10.07	99.99
2021	27	88.13	99.89

Published record details

Reference: UUP02182
Location: Weaver (Marbury Brook to Barnett Brook)
Coordinates: 53.02388, -2.58621
Watercourse: River Weaver
Sewerage company: United Utilities
Asset type: Inlet SO at WwTW
Permit reference: 016810119
Discharge grid reference: SJ6077747560
Reporting years: 2025, 2024, 2023, 2022, 2021
Catchment: Weaver (Marbury Brook to Barnett Brook)

Location

Wrenbury Wastewater Treatment Works
53.02388, -2.58621

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

Wrenbury Hall Road Sps1.1 km Broomhall Sps1.5 km Newhall Pumping Station2 km Ravensmoor Pumping Station3.1 km Vicarage Road CSO6.7 km

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