← BLACKBROOK NORTH_CSO_PRINCETOWN
Spill evidence · Friends of the Dart
BLACKBROOK NORTH_CSO_PRINCETOWN
Combined sewer overflow · SBB00119 · feeds PRINCETOWN STW
Wet weather
The discharge
- Spill day
- Friday, 21 August 2026
- Started
- 21 Aug 2026, 03:00
- Ended
- 21 Aug 2026, 10:18
- Duration
- 7 hours 18 minutes
- Receiving water
- Blackbrook River
- Parish
- Dartmoor Forest
Rainfall evidence
Daily rainfall at the matched gauge (Princetown) 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 | |
|---|---|---|
| 21/08/2026 (spill day) | no data | |
| 20/08/2026 | 7 mm | rain |
| 19/08/2026 | 4.8 mm | rain |
| 18/08/2026 | 17.4 mm | rain |
| 17/08/2026 | 7 mm | rain |
River flow that day: 1.338 m³/s. Verify at the EA rainfall station.
Gauge proximity
Outlet (red) vs matched rain gauge (blue), 0.7 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
- Ahead of the works
- Yes — the treatment works' own overflow stayed shut that day, so capacity was available. Avoidable.
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 SBB00119). Rainfall: EA Hydrology gauge f0676423-f697-4dec-8958-440f335cce9a. 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.