Spill evidence · Friends of the Dart

31 Fore Street, Totnes

Combined sewer overflow · SBB00025 · feeds TOTNES STW

No rain data

The discharge

Spill day: Tuesday, 18 February 2020
Started: 18 Feb 2020, 16:32
Ended: 18 Feb 2020, 16:50
Duration: 18 minutes
Receiving water: Dart
Parish: Totnes

Rainfall evidence

Daily rainfall at the matched gauge (Harbertonford Slipperstone) 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: No rain data3-day window: No rain data4-day window: No rain data

Date	Rainfall
18/02/2020 (spill day)	no data
17/02/2020	no data
16/02/2020	no data
15/02/2020	no data
14/02/2020	no data

River flow that day: —. Verify at the EA rainfall station.

Gauge proximity

Outlet (red) vs matched rain gauge (blue), 5.8 km apart. Closer means the rainfall reading is more representative of the overflow.

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Severity & context

Bathing water: Steamer Quay, Dart Estuary
Shellfish water: Dart
Ahead of the works: Yes — the treatment works' own overflow stayed shut that day, so capacity was available. Avoidable.
EA annual return (2020): 38 counted spills · 24 h total
Monitor uptime (2020): 24% 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 SBB00025). Rainfall: EA Hydrology gauge 8d954129-924c-47e3-8750-5f29a59617b2. 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.