Spill evidence · Friends of the Dart

Townstal Tank, Dartmouth

Combined sewer overflow · SBB01269 · feeds DARTMOUTH STW

Wet weather

The discharge

Spill day: Friday, 18 April 2025
Started: 18 Apr 2025, 19:53
Ended: 19 Apr 2025, 02:00
Duration: 6 hours 6 minutes
Receiving water: —
Parish: —

Rainfall evidence

Daily rainfall at the matched gauge (Brixham) 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
18/04/2025 (spill day)	18.7 mm	rain
17/04/2025	7.4 mm	rain
16/04/2025	0 mm	dry
15/04/2025	40.3 mm	rain
14/04/2025	3.4 mm	rain

River flow that day: 54.445 m³/s. Verify at the EA rainfall station.

Gauge proximity

Outlet (red) vs matched rain gauge (blue), 6.1 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: Dart
Ahead of the works: Unknown (no works overflow data)

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 SBB01269). Rainfall: EA Hydrology gauge 9dba2bf3-f5ea-4616-ac8e-dce16dbc0dc8. 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.