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Tolvaddon Downs CSO: sewage overflow history

Review available Environment Agency annual monitoring returns for Tolvaddon Downs CSO. 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	69	505.14	100
2024	35	49.04	100
2023	41	54.02	100
2022	32	28.88	100
2021	45	192.46	100

Published record details

Reference: SBB01249
Location: Red River (Upper)
Coordinates: 50.22869, -5.28633
Watercourse: Tolvaddon Stream (S)
Sewerage company: South West Water
Asset type: SO on sewer network
Permit reference: 301807
Discharge grid reference: SW65714169
Reporting years: 2025, 2024, 2023, 2022, 2021
Catchment: Red River (Upper)

Location

Tolvaddon Downs CSO
50.22869, -5.28633

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

Storm overflow SBB014211.1 km St Martins Crescent CSO2 km Reskadinnick Pumping Station2.3 km Tolskithey Lane CSO2.5 km Knave-Go-Bye Combined Sewer Overflo3 km

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