Sewage Tank Cleaning

Deva Terrace CSO: sewage overflow history

Review available Environment Agency annual monitoring returns for Deva Terrace CSO. Compare reported spill counts, total duration and monitor operation by year, with source details and gaps in the series identified.

← All records

Annual monitoring returns

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	44	78.5	96.58
2024	87	155	97.76

Published record details

Reference: DCW00042
Location: Finchetts Gutter
Coordinates: 53.19054, -2.87849
Watercourse: River Dee
Sewerage company: Dwr Cymru Welsh Water
Asset type: SO on sewer network
Permit reference: CM0124701
Discharge grid reference: SJ4140066300
Reporting years: 2025, 2024
Catchment: Finchetts Gutter

Location

Deva Terrace CSO
53.19054, -2.87849

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

Dee Lane CSO0.1 km Boathouse Inn CSO0.3 km The Groves CSO0.6 km Sandy Lane Combined Sewer Overflow0.7 km Chester Weir (South Bank) CSO0.9 km

Sewage Tank Cleaning

Need help with sewage at a property or site?

Describe the affected area and the type of assistance you are seeking, such as sewage removal, tank cleaning or pump station cleaning. Include any information already available about the source of the problem.

Discuss sewage removal