Sewage Tank Cleaning

16 High Street CSO: sewage overflow history

Review available Environment Agency annual monitoring returns for 16 High Street 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

2022

2023

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	29	234.33	99.94
2024	43	359.5	99.93
2023	65	624.5	99.97
2022	27	84.75	98.34

Published record details

Reference: WXW00009
Location: Frome Dorset (Lower) u/s Louds Mill Dorchester
Coordinates: 50.71558, -2.43154
Watercourse: Dorchester Mill Stream
Sewerage company: Wessex Water
Asset type: SO on sewer network
Permit reference: 400683
Discharge grid reference: SY6963090750
Reporting years: 2025, 2024, 2023, 2022
Catchment: Frome Dorset (Lower) u/s Louds Mill Dorchester

Location

16 High Street CSO
50.71558, -2.43154

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

Victoria Road CSO0.1 km CSO At Top Of South Walks0.1 km CSO At Princes Bridge0.4 km CSO At 97 High Street0.5 km 35 Kings Road0.5 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