← Compton & Marldon STW
Spill evidence · Friends of the River Teign
Compton & Marldon STW
Storm overflow at the works · SBB00300 · feeds COMPTON AND MARLDON 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
- Friday, 27 January 2023
- Started
- 27 Jan 2023, 06:36
- Ended
- 27 Jan 2023, 07:59
- Duration
- 1 hour 22 minutes
- Receiving water
- Aller Brook
- Parish
- Marldon
Rainfall evidence
Daily rainfall at the matched gauge (Torbay Compton) 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 | |
|---|---|---|
| 27/01/2023 (spill day) | 0 mm | dry |
| 26/01/2023 | 0 mm | dry |
| 25/01/2023 | 0 mm | dry |
| 24/01/2023 | 0.4 mm | rain |
| 23/01/2023 | 0 mm | dry |
River flow that day: 6.219 m³/s. Verify at the EA rainfall station.
Gauge proximity
Outlet (red) vs matched rain gauge (blue), 1.7 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 (2023)
- 45 counted spills · 685 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 SBB00300). Rainfall: EA Hydrology gauge e7e2f7d4-f497-4adc-b077-c20bc2dcedfa. 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.