← Summerhill pumping station, Ilsington
Spill evidence · Friends of the River Teign
Summerhill pumping station, Ilsington
Pumping station overflow · SBB01191 · feeds HEATHFIELD STW
Dry spill
Evidence strength
Medium confidence- ✓ Sustained discharge (≥1 h)
- ✓ Dry on the EA 1-day window
- ✓ Rain gauge close (≤5 km)
- ✓ Monitor 100% operational that year
The discharge
- Spill day
- Thursday, 25 December 2025
- Started
- 25 Dec 2025, 08:46
- Ended
- 25 Dec 2025, 10:42
- Duration
- 1 hour 55 minutes
- Receiving water
- Liverton Brook
- Parish
- Ilsington
Rainfall evidence
Daily rainfall at the matched gauge (Bickington) 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: Wet weather4-day window: Wet weather
| Date | Rainfall | |
|---|---|---|
| 25/12/2025 (spill day) | 0 mm | dry |
| 24/12/2025 | 0 mm | dry |
| 23/12/2025 | 0 mm | dry |
| 22/12/2025 | 1.2 mm | rain |
| 21/12/2025 | 12.1 mm | rain |
River flow that day: 10.665 m³/s. Verify at the EA rainfall station.
Gauge proximity
Outlet (red) vs matched rain gauge (blue), 3.3 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
- Ahead of the works
- Yes — the treatment works' own overflow stayed shut that day, so capacity was available. Avoidable.
- EA annual return (2025)
- 87 counted spills · 1364 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 SBB01191). Rainfall: EA Hydrology gauge 31653dd5-c1ed-4091-a860-5e8d25936861. 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.