← Trusham STW, Teign Valley
Spill evidence · Friends of the River Teign
Trusham STW, Teign Valley
Storm overflow at the works · SBB01288 · feeds TRUSHAM_STW_TEIGN VALLEY
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, 25 May 2023
- Started
- 25 May 2023, 19:13
- Ended
- 25 May 2023, 19:42
- Duration
- 29 minutes 12 seconds
- Receiving water
- Teign (Lower)
- Parish
- Trusham
Rainfall evidence
Daily rainfall at the matched gauge (Ashcombe) 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
| Date | Rainfall | |
|---|---|---|
| 25/05/2023 (spill day) | 0 mm | dry |
| 24/05/2023 | 0 mm | dry |
| 23/05/2023 | 0 mm | dry |
| 22/05/2023 | 0 mm | dry |
| 21/05/2023 | 0 mm | dry |
River flow that day: 2.212 m³/s. Verify at the EA rainfall station.
Gauge proximity
Outlet (red) vs matched rain gauge (blue), 7.2 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
- EA annual return (2023)
- 134 counted spills · 1901 h total
- Monitor uptime (2023)
- 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 SBB01288). Rainfall: EA Hydrology gauge 4e00b4e3-af60-47cf-afe7-b36ac774ca82. 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.