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Heathfield STW, Newton Abbot

Spill evidence · Friends of the River Teign

Heathfield STW, Newton Abbot

Storm overflow at the works · SBB00557 · feeds HEATHFIELD STW
Dry spill

Evidence strength

Medium confidence
  • Dry across a 4-day antecedent window
  • Monitor 100% operational that year
  • Short discharge (<1 h) — weaker signal

The discharge

Spill day
Thursday, 12 December 2024
Started
12 Dec 2024, 00:05
Ended
12 Dec 2024, 00:20
Duration
15 minutes 18 seconds
Receiving water
Lower Bovey
Parish
Bovey Tracey

Rainfall evidence

Daily rainfall at the matched gauge (Bovey Tracey) 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: Dry spill3-day window: Dry spill4-day window: Dry spill
DateRainfall
12/12/2024 (spill day)0 mmdry
11/12/20240 mmdry
10/12/20240 mmdry
09/12/20240 mmdry
08/12/20240 mmdry

River flow that day: 6.794 m³/s. Verify at the EA rainfall station.

Gauge proximity

Outlet (red) vs matched rain gauge (blue), 5.6 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
Teign Estuary
EA annual return (2024)
145 counted spills · 2826 h total
Monitor uptime (2024)
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 SBB00557). Rainfall: EA Hydrology gauge de3285a5-0abf-4c5b-8ee2-63187f9124ae. 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 Teign Data.