OPP 26 MARKET STREET_CSO_BUCKFASTLEIGH

Combined sewer overflow · SBB01408 · feeds BUCKFASTLEIGH STW

Wet weather

The discharge

Spill day: Tuesday, 9 December 2025
Started: 9 Dec 2025, 00:30
Ended: 9 Dec 2025, 14:44
Duration: 14 hours 14 minutes
Receiving water: Mardle
Parish: Buckfastleigh

Rainfall evidence

Daily rainfall at the matched gauge (Austins Bridge) for the spill day and the days before. A spill is dry when every day in the window is ≤ 0.25 mm.

1-day window: Wet weather3-day window: Wet weather4-day window: Wet weather

Date	Rainfall
09/12/2025 (spill day)	8.2 mm	rain
08/12/2025	52.3 mm	rain
07/12/2025	12.3 mm	rain
06/12/2025	14.6 mm	rain
05/12/2025	37 mm	rain

River flow that day: 122.185 m³/s. Verify at the EA rainfall station.

Gauge proximity

Outlet (red) vs matched rain gauge (blue), 1.6 km apart. Closer means the rainfall reading is more representative of the overflow.

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Severity & context

Bathing water: Not Applicable
Shellfish water: Not Applicable
Ahead of the works: Yes — the treatment works' own overflow stayed shut that day, so capacity was available. Avoidable.
EA annual return (2025): 32 counted spills · 51 h total
Monitor uptime (2025): 100% operational

Method & provenance. Dry/wet classification is decided by rainfall at the nearest EA gauge — ≤ 0.25 mm on the spill day and each preceding day of the window (how we classify). Spill data: Environment Agency EDM (outlet SBB01408). Rainfall: EA Hydrology gauge fd8ea26c-8052-48c5-a1bb-bbd5ebbbb3d3_364176. A dry spill is precautionary evidence of a likely fault, not proof of an offence — we test the rainfall, not the works' flow. Generated by River Hub.