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Gratton CSO: sewage overflow history

Review available Environment Agency annual monitoring returns for Gratton 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

151

2023

211

2024

167

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	167	2,123.83	99.94
2024	211	2,583.14	100
2023	151	1,815.7	94.19

Published record details

Reference: SBB00514
Location: Meavy
Coordinates: 50.48437, -4.07596
Watercourse: River Meavy
Sewerage company: South West Water
Asset type: SO on sewer network
Permit reference: 301897
Discharge grid reference: SX52826701
Reporting years: 2025, 2024, 2023
Catchment: Meavy

Location

Gratton CSO
50.48437, -4.07596

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

Gratton Wastewater Treatment Works0.6 km Storm overflow SBB014330.6 km CSO Adj Glenview1.1 km Lake Lane CSO1.1 km Meavy Wastewater Treatment Works1.1 km

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