Sewage Tank Cleaning

Congleton STW: sewage overflow history (UUP00532)

Review available Environment Agency annual monitoring returns for Congleton STW. 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	18	103.23	100
2024	65	424.31	99.95
2023	65	326.92	85.74
2022	0	0	99.81
2021	0	0	96.66

Published record details

Reference: UUP00532
Location: Dane (Cow Brook to Wheelock)
Coordinates: 53.16822, -2.22005
Watercourse: River Dane
Sewerage company: United Utilities
Asset type: Storm tank at WwTW
Permit reference: 016810066
Discharge grid reference: SJ8538763479
Reporting years: 2025, 2024, 2023, 2022, 2021
Catchment: Dane (Cow Brook to Wheelock)

Location

Congleton STW
53.16822, -2.22005

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

Congleton STW0.1 km Dane Street CSO 131Q10.3 km Sefton Avenue CSO (Con0090)0.7 km The Grange Congleton CSO0.7 km Bromley Rd Coronation Rd CSO 131Gz1 km

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