River Dart at Holne Weir
EA name: RIVER DART AT HOLNE WEIR
Environment Agency sampling point SW-70720268 · Freshwater - rivers · listed as open (“open” does not mean it is sampled now)
These are samples taken on a date, not live readings of the river. Results reach the Environment Agency's archive days to months after the sample is taken, so the newest here may be weeks or months old. FloodRadar does not grade them.
Where and when
- Last sampled
- 18 Sep 2026, 13:0520 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 19 since 22 May 2026 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring) · results completed 22 Sep 2026
- Where
- National Grid 273207, 70593As published, to the nearest 1 m. Open in a map
- River, by its own name
- Dart
- River, by the map
- River DartPlaced on the river its name gives, 2 m from the line.
- Next gauge downstream
- Austins Bridge On the River Dart · 6.3 km along the river
- Nearest gauge upstream
- Dunnabridge On the West Dart River · 17 km along the riverBellever On the East Dart River · 18 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (19 samples)
Results here were completed a median of 4 days after the sample was taken (4 to 11 days, 19 samples).
Main measurements, river water
E. coli
confirmed, membrane filtration · code 2348 · per 100 ml
36 per 100 ml
Sampled 18 Sep 2026, 20 days ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Sep 2026, 13:05 | 36 | 36 per 100 ml |
| 7 Sep 2026, 15:25 | 27 | 27 per 100 ml |
| 1 Sep 2026, 14:48 | 36 | 36 per 100 ml |
| 21 Aug 2026, 14:55 | 27 | 27 per 100 ml |
| 17 Aug 2026, 16:08 | <10 | below 10 per 100 ml (not detected above this) |
| 7 Aug 2026, 10:01 | <10 | below 10 per 100 ml (not detected above this) |
| 3 Aug 2026, 10:43 | 27 | 27 per 100 ml |
| 21 Jul 2026, 09:26 | 18 | 18 per 100 ml |
| 18 Jul 2026, 14:56 | 45 | 45 per 100 ml |
| 10 Jul 2026, 16:15 | 18 | 18 per 100 ml |
| 5 Jul 2026, 13:10 | 18 | 18 per 100 ml |
| 26 Jun 2026, 10:40 | 36 | 36 per 100 ml |
| 23 Jun 2026, 09:55 | 27 | 27 per 100 ml |
| 19 Jun 2026, 13:25 | 27 | 27 per 100 ml |
| 11 Jun 2026, 14:23 | 72 | 72 per 100 ml |
| 8 Jun 2026, 16:10 | 150 | 150 per 100 ml |
| 4 Jun 2026, 16:18 | 550 | 550 per 100 ml |
| 26 May 2026, 16:15 | 54 | 54 per 100 ml |
| 22 May 2026, 14:08 | 27 | 27 per 100 ml |
Everything measured here
5 determinands, each kept by its code, unit and sample material: results in different units or on different materials are never mixed. A “below” result is under the laboratory's detection limit, not zero.
Show all 5 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Escherichia coli : Confirmed : MF 2348 | River water | 19 | May 2026 – Sep 2026 | 36 per 100 ml 18 Sep 2026 |
| Enterococci: Intestinal: Presumptive: MF 3722 | River water | 19 | May 2026 – Sep 2026 | 18 colony forming units / 100ml 18 Sep 2026 |
| MST Filtration 4926 | River water | 19 | May 2026 – Sep 2026 | DNA Stored 18 Sep 2026 |
| Salinity : In Situ 7608 | River water | 19 | May 2026 – Sep 2026 | 0.03 parts per thousand 18 Sep 2026 |
| Volume of Sample Filtered 4865 | River water | 19 | May 2026 – Sep 2026 | 850 millilitre 18 Sep 2026 |
FloodRadar does not grade these results: there is no overall score, and official river classifications are a separate dataset. A sample taken downstream of an overflow does not by itself show where anything in it came from. River connections and distances are traced on OS Open Rivers (edition 2026-04), which leaves out many small channels.
Water samples: Environment Agency Water Quality Archive, © Environment Agency and/or database right 2026, Open Government Licence v3.0.
Contains OS data © Crown copyright and database rights 2026.