Tarrant Keyneston
EA name: TARRANT KEYNESTON
Environment Agency sampling point SW-WRPNTS39 · 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
- 20 Aug 2026, 11:3142 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 17 since 28 Apr 2025 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 392425, 103907As published, to the nearest 1 m. Open in a map
- River, by its own name
- Tarrant
- River, by the map
- The TarrantPlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- Wimborne On the River Stour · 20 km along the river
- Why it was sampled
- Monitoring (national agency policy) (17 samples)
7 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
98.9%
Sampled 26 May 2026, 4 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 May 2026, 11:47 | 98.9 | 98.9% |
| 24 Apr 2026, 11:12 | 107.1 | 107.1% |
| 24 Mar 2026, 12:08 | 102.5 | 102.5% |
| 19 Feb 2026, 12:46 | 102.6 | 102.6% |
| 28 Jan 2026, 12:53 | 99.8 | 99.8% |
| 31 Dec 2025, 15:02 | 96.6 | 96.6% |
| 18 Nov 2025, 11:48 | 90.7 | 90.7% |
| 11 Jun 2025, 13:30 | 110.5 | 110.5% |
| 29 May 2025, 12:34 | 102.2 | 102.2% |
| 28 Apr 2025, 19:17 | 106.8 | 106.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.63 mg/l
Sampled 26 May 2026, 4 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 May 2026, 11:47 | 9.63 | 9.63 mg/l |
| 24 Apr 2026, 11:12 | 11.8 | 11.8 mg/l |
| 24 Mar 2026, 12:08 | 11.4 | 11.4 mg/l |
| 19 Feb 2026, 12:46 | 11.8 | 11.8 mg/l |
| 28 Jan 2026, 12:53 | 11.6 | 11.6 mg/l |
| 31 Dec 2025, 15:02 | 11.3 | 11.3 mg/l |
| 18 Nov 2025, 11:48 | 10.6 | 10.6 mg/l |
| 11 Jun 2025, 13:30 | 10.7 | 10.7 mg/l |
| 29 May 2025, 12:34 | 10.3 | 10.3 mg/l |
| 28 Apr 2025, 19:17 | 11.6 | 11.6 mg/l |
Water temperature
code 0076 · °C
16.5 °C
Sampled 26 May 2026, 4 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 May 2026, 11:47 | 16.5 | 16.5 °C |
| 24 Apr 2026, 11:12 | 10.9 | 10.9 °C |
| 24 Mar 2026, 12:08 | 10.6 | 10.6 °C |
| 19 Feb 2026, 12:46 | 9 | 9 °C |
| 28 Jan 2026, 12:53 | 8.6 | 8.6 °C |
| 31 Dec 2025, 15:02 | 8.3 | 8.3 °C |
| 18 Nov 2025, 11:48 | 8.3 | 8.3 °C |
| 11 Jun 2025, 13:30 | 16.7 | 16.7 °C |
| 29 May 2025, 12:34 | 14.8 | 14.8 °C |
| 28 Apr 2025, 19:17 | 11.7 | 11.7 °C |
pH
code 0061
8.2
Sampled 26 May 2026, 4 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 May 2026, 11:47 | 8.2 | 8.2 |
| 24 Apr 2026, 11:12 | 8.09 | 8.09 |
| 24 Mar 2026, 12:08 | 8.02 | 8.02 |
| 19 Feb 2026, 12:46 | 7.97 | 7.97 |
| 28 Jan 2026, 12:53 | 8.01 | 8.01 |
| 31 Dec 2025, 15:02 | 7.97 | 7.97 |
| 18 Nov 2025, 11:48 | 7.99 | 7.99 |
| 11 Jun 2025, 13:30 | 8.19 | 8.19 |
| 29 May 2025, 12:34 | 8.2 | 8.2 |
| 28 Apr 2025, 19:17 | 8.16 | 8.16 |
Conductivity
at 25 °C · code 0077 · µS/cm
718 µS/cm
Sampled 26 May 2026, 4 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 May 2026, 11:47 | 718 | 718 µS/cm |
| 24 Apr 2026, 11:12 | 606 | 606 µS/cm |
| 24 Mar 2026, 12:08 | 603 | 603 µS/cm |
| 19 Feb 2026, 12:46 | 583 | 583 µS/cm |
| 28 Jan 2026, 12:53 | 568 | 568 µS/cm |
| 31 Dec 2025, 15:02 | 604 | 604 µS/cm |
| 18 Nov 2025, 11:48 | 624 | 624 µS/cm |
| 11 Jun 2025, 13:30 | 597 | 597 µS/cm |
| 29 May 2025, 12:34 | 607 | 607 µS/cm |
| 28 Apr 2025, 19:17 | 595 | 595 µS/cm |
Everything measured here
8 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 8 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 10 | Apr 2025 – May 2026 | 98.9% 26 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 10 | Apr 2025 – May 2026 | 9.63 mg/l 26 May 2026 |
| Temperature of Water 0076 | River water | 10 | Apr 2025 – May 2026 | 16.5 °C 26 May 2026 |
| pH 0061 | River water | 10 | Apr 2025 – May 2026 | 8.2 26 May 2026 |
| Conductivity at 25 C 0077 | River water | 10 | Apr 2025 – May 2026 | 718 µS/cm 26 May 2026 |
| Flow Type 2896 | River water | 17 | Apr 2025 – Aug 2026 | Dry 20 Aug 2026 |
| No flow /No sample 7668 | River water | 7 | Jul 2025 – Aug 2026 | No flow/discharge at sampling point 20 Aug 2026 |
| Photo Taken: Yes/No (1/0) 3257 | River water | 10 | Apr 2025 – May 2026 | Yes 26 May 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.