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Sws, Stoke Road, Cobham, Surrey: sewage overflow history

Review available Environment Agency annual monitoring returns for Sws, Stoke Road, Cobham, Surrey. 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

2023

2024

2025

Year	Counted spills	Total spill duration (hours)	Monitor operation (%)
2025	6	44.67	95.66
2024	14	103.27	97.91
2023	2	9.73	100

Published record details

Reference: TWL00744
Location: Mole - Leatherhead to Hersham
Coordinates: 51.32651, -0.40428
Watercourse: River Mole
Sewerage company: Thames Water
Asset type: SO on sewer network
Permit reference: CTCR.2076
Discharge grid reference: TQ1128059810
Reporting years: 2025, 2024, 2023
Catchment: Mole - Leatherhead to Hersham

Location

Sws, Stoke Road, Cobham, Surrey
51.32651, -0.40428

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

Cobham Bridge, Adj Cobham Ps1.6 km Leatherhead WWTW3.9 km Commonside4.1 km River Lane Pumping Station4.4 km Weybridge WWTW5.6 km

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