← Harbertonford STW
Spill evidence · Friends of the Dart
Harbertonford STW
Storm overflow at the works · SBB00537 · feeds HARBERTONFORD_STW_HARBERTONFORD
Wet weather
The discharge
- Spill day
- Saturday, 29 November 2025
- Started
- 29 Nov 2025, 08:07
- Ended
- 1 Jan 2026, 00:00
- Duration
- 32 days 15 hours
- Receiving water
- Harbourne River
- Parish
- Harberton
Rainfall evidence
Daily rainfall at the matched gauge (Harbertonford Slipperstone) 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 | |
|---|---|---|
| 29/11/2025 (spill day) | 0.1 mm | dry |
| 28/11/2025 | 13.2 mm | rain |
| 27/11/2025 | 2.2 mm | rain |
| 26/11/2025 | 2.4 mm | rain |
| 25/11/2025 | 0 mm | dry |
River flow that day: 33.841 m³/s. Verify at the EA rainfall station.
Gauge proximity
Outlet (red) vs matched rain gauge (blue), 2.6 km apart. Closer means the rainfall reading is more representative of the overflow.
Loading map…
Severity & context
- Bathing water
- Not Applicable
- Shellfish water
- Not Applicable
- EA annual return (2025)
- 120 counted spills · 2494 h total
- Monitor uptime (2025)
- 98% 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 SBB00537). Rainfall: EA Hydrology gauge 8d954129-924c-47e3-8750-5f29a59617b2. 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.