River Okement at South Dornaford
EA name: RIVER OKEMENT AT SOUTH DORNAFORD (also listed as “RIVER OKEMENT AT SOUTH DORNAFORD BELOW HILL BARTON STW”)
Environment Agency sampling point SW-72940158 · 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
- 7 Sep 2026, 13:2424 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 22 since 24 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring)
- Where
- National Grid 259990, 100050As published, to the nearest 10 m. Open in a map
- River, by its own name
- Okement
- River, by the map
- River OkementPlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- Jacobstowe On the River Okement · 2.8 km along the river
- Nearest gauge upstream
- Okehampton Mill Road On the East Okement River · 6.4 km along the riverMeldon On the West Okement River · 11 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (19 samples)
Planned investigation (national agency policy) (3 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
99.3%
Sampled 7 Sep 2026, 24 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:24 | 99.3 | 99.3% |
| 5 Aug 2026, 13:23 | 99.9 | 99.9% |
| 16 Jul 2026, 10:25 | 92.1 | 92.1% |
| 8 Jun 2026, 14:52 | 97.1 | 97.1% |
| 11 May 2026, 12:32 | 103 | 103% |
| 27 Apr 2026, 11:52 | 102.6 | 102.6% |
| 31 Mar 2025, 12:00 | 104.8 | 104.8% |
| 4 Feb 2025, 10:06 | 99.8 | 99.8% |
| 15 Jan 2025, 13:11 | 100.1 | 100.1% |
| 10 Dec 2024, 13:06 | 98.6 | 98.6% |
| 26 Nov 2024, 14:05 | 100.3 | 100.3% |
| 29 Oct 2024, 13:22 | 100.4 | 100.4% |
| 5 Sep 2024, 12:10 | 100 | 100% |
| 6 Aug 2024, 10:36 | 100.1 | 100.1% |
| 9 Jul 2024, 11:18 | 98.2 | 98.2% |
| 19 Jun 2024, 11:45 | 100.2 | 100.2% |
| 30 May 2024, 14:23 | 98.9 | 98.9% |
| 1 Feb 2024, 12:48 | 99.7 | 99.7% |
| 12 Jan 2024, 10:17 | 100.4 | 100.4% |
| 5 Dec 2023, 12:10 | 101.5 | 101.5% |
| 7 Nov 2023, 13:00 | 100.8 | 100.8% |
| 24 Oct 2023, 12:45 | 96.4 | 96.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.65 mg/l
Sampled 7 Sep 2026, 24 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:24 | 9.65 | 9.65 mg/l |
| 5 Aug 2026, 13:23 | 9.53 | 9.53 mg/l |
| 16 Jul 2026, 10:25 | 8.68 | 8.68 mg/l |
| 8 Jun 2026, 14:52 | 10.2 | 10.2 mg/l |
| 11 May 2026, 12:32 | 11.6 | 11.6 mg/l |
| 27 Apr 2026, 11:52 | 11.3 | 11.3 mg/l |
| 31 Mar 2025, 12:00 | 12.2 | 12.2 mg/l |
| 4 Feb 2025, 10:06 | 11.9 | 11.9 mg/l |
| 15 Jan 2025, 13:11 | 12.3 | 12.3 mg/l |
| 10 Dec 2024, 13:06 | 11.7 | 11.7 mg/l |
| 26 Nov 2024, 14:05 | 11.5 | 11.5 mg/l |
| 29 Oct 2024, 13:22 | 10.8 | 10.8 mg/l |
| 5 Sep 2024, 12:10 | 10.4 | 10.4 mg/l |
| 6 Aug 2024, 10:36 | 9.73 | 9.73 mg/l |
| 9 Jul 2024, 11:18 | 9.96 | 9.96 mg/l |
| 19 Jun 2024, 11:45 | 10.5 | 10.5 mg/l |
| 30 May 2024, 14:23 | 10.5 | 10.5 mg/l |
| 1 Feb 2024, 12:48 | 11.8 | 11.8 mg/l |
| 12 Jan 2024, 10:17 | 12.5 | 12.5 mg/l |
| 5 Dec 2023, 12:10 | 12.1 | 12.1 mg/l |
| 7 Nov 2023, 13:00 | 11.1 | 11.1 mg/l |
| 24 Oct 2023, 12:45 | 10.6 | 10.6 mg/l |
Water temperature
code 0076 · °C
16.6 °C
Sampled 7 Sep 2026, 24 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:24 | 16.6 | 16.6 °C |
| 5 Aug 2026, 13:23 | 17.5 | 17.5 °C |
| 16 Jul 2026, 10:25 | 18.1 | 18.1 °C |
| 8 Jun 2026, 14:52 | 12.9 | 12.9 °C |
| 11 May 2026, 12:32 | 10 | 10 °C |
| 27 Apr 2026, 11:52 | 10.8 | 10.8 °C |
| 31 Mar 2025, 12:00 | 8.6 | 8.6 °C |
| 4 Feb 2025, 10:06 | 7.6 | 7.6 °C |
| 15 Jan 2025, 13:11 | 6.5 | 6.5 °C |
| 10 Dec 2024, 13:06 | 7.9 | 7.9 °C |
| 26 Nov 2024, 14:05 | 9.3 | 9.3 °C |
| 29 Oct 2024, 13:22 | 12.1 | 12.1 °C |
| 5 Sep 2024, 12:10 | 13.5 | 13.5 °C |
| 6 Aug 2024, 10:36 | 16.6 | 16.6 °C |
| 9 Jul 2024, 11:18 | 14.6 | 14.6 °C |
| 19 Jun 2024, 11:45 | 13.3 | 13.3 °C |
| 30 May 2024, 14:23 | 12.7 | 12.7 °C |
| 1 Feb 2024, 12:48 | 8.1 | 8.1 °C |
| 12 Jan 2024, 10:17 | 5.9 | 5.9 °C |
| 5 Dec 2023, 12:10 | 7.6 | 7.6 °C |
| 7 Nov 2023, 13:00 | 10.8 | 10.8 °C |
| 24 Oct 2023, 12:45 | 11.1 | 11.1 °C |
pH
code 0061
7.74
Sampled 7 Sep 2026, 24 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:24 | 7.74 | 7.74 |
| 5 Aug 2026, 13:23 | 7.61 | 7.61 |
| 16 Jul 2026, 10:25 | 8.17 | 8.17 |
| 8 Jun 2026, 14:52 | 7.3 | 7.3 |
| 11 May 2026, 12:32 | 7.55 | 7.55 |
| 27 Apr 2026, 11:52 | 7.37 | 7.37 |
| 31 Mar 2025, 12:00 | 7.61 | 7.61 |
| 4 Feb 2025, 10:06 | 7.39 | 7.39 |
| 15 Jan 2025, 13:11 | 7.17 | 7.17 |
| 10 Dec 2024, 13:06 | 7.12 | 7.12 |
| 26 Nov 2024, 14:05 | 7.24 | 7.24 |
| 29 Oct 2024, 13:22 | 7.31 | 7.31 |
| 5 Sep 2024, 12:10 | 7.41 | 7.41 |
| 6 Aug 2024, 10:36 | 7.83 | 7.83 |
| 9 Jul 2024, 11:18 | 7.73 | 7.73 |
| 19 Jun 2024, 11:45 | 7.48 | 7.48 |
| 30 May 2024, 14:23 | 7.47 | 7.47 |
| 1 Feb 2024, 12:48 | 7.28 | 7.28 |
| 12 Jan 2024, 10:17 | 7.17 | 7.17 |
| 5 Dec 2023, 12:10 | 6.74 | 6.74 |
| 7 Nov 2023, 13:00 | 6.8 | 6.8 |
| 24 Oct 2023, 12:45 | 7.6 | 7.6 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 7 Sep 2026, 24 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Aug 2026, 13:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jul 2026, 10:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jun 2026, 14:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 May 2026, 12:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Apr 2026, 11:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 31 Mar 2025, 12:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2025, 10:06 | 0.037 | 0.037 mg/l |
| 15 Jan 2025, 13:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Dec 2024, 13:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Nov 2024, 14:05 | 0.048 | 0.048 mg/l |
| 29 Oct 2024, 13:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Sep 2024, 12:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Aug 2024, 10:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jul 2024, 11:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Jun 2024, 11:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 May 2024, 14:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Feb 2024, 12:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Jan 2024, 10:17 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Dec 2023, 12:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Nov 2023, 13:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Oct 2023, 12:45 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.976 mg/l
Sampled 7 Sep 2026, 24 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:24 | 0.976 | 0.976 mg/l |
| 5 Aug 2026, 13:23 | 0.886 | 0.886 mg/l |
| 16 Jul 2026, 10:25 | 0.616 | 0.616 mg/l |
| 8 Jun 2026, 14:52 | 0.326 | 0.326 mg/l |
| 11 May 2026, 12:32 | 0.645 | 0.645 mg/l |
| 27 Apr 2026, 11:52 | 0.786 | 0.786 mg/l |
| 31 Mar 2025, 12:00 | 1.2 | 1.2 mg/l |
| 4 Feb 2025, 10:06 | 1.39 | 1.39 mg/l |
| 15 Jan 2025, 13:11 | 1.3 | 1.3 mg/l |
| 10 Dec 2024, 13:06 | 1.4 | 1.4 mg/l |
| 26 Nov 2024, 14:05 | 1.6 | 1.6 mg/l |
| 29 Oct 2024, 13:22 | 1.1 | 1.1 mg/l |
| 5 Sep 2024, 12:10 | 1.5 | 1.5 mg/l |
| 6 Aug 2024, 10:36 | 0.776 | 0.776 mg/l |
| 9 Jul 2024, 11:18 | 0.206 | 0.206 mg/l |
| 19 Jun 2024, 11:45 | 1.3 | 1.3 mg/l |
| 30 May 2024, 14:23 | 1.2 | 1.2 mg/l |
| 1 Feb 2024, 12:48 | 1.2 | 1.2 mg/l |
| 12 Jan 2024, 10:17 | 1.39 | 1.39 mg/l |
| 5 Dec 2023, 12:10 | 0.416 | 0.416 mg/l |
| 7 Nov 2023, 13:00 | 0.956 | 0.956 mg/l |
| 24 Oct 2023, 12:45 | 1.1 | 1.1 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.25 mg/l
Sampled 7 Sep 2026, 24 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:24 | 0.25 | 0.25 mg/l |
| 5 Aug 2026, 13:23 | 0.45 | 0.45 mg/l |
| 16 Jul 2026, 10:25 | 0.041 | 0.041 mg/l |
| 8 Jun 2026, 14:52 | 0.052 | 0.052 mg/l |
| 11 May 2026, 12:32 | 0.17 | 0.17 mg/l |
| 27 Apr 2026, 11:52 | 0.14 | 0.14 mg/l |
| 31 Mar 2025, 12:00 | 0.11 | 0.11 mg/l |
| 4 Feb 2025, 10:06 | 0.063 | 0.063 mg/l |
| 15 Jan 2025, 13:11 | 0.062 | 0.062 mg/l |
| 10 Dec 2024, 13:06 | 0.031 | 0.031 mg/l |
| 26 Nov 2024, 14:05 | 0.021 | 0.021 mg/l |
| 29 Oct 2024, 13:22 | 0.081 | 0.081 mg/l |
| 5 Sep 2024, 12:10 | 0.23 | 0.23 mg/l |
| 6 Aug 2024, 10:36 | 0.12 | 0.12 mg/l |
| 9 Jul 2024, 11:18 | 0.049 | 0.049 mg/l |
| 19 Jun 2024, 11:45 | 0.15 | 0.15 mg/l |
| 30 May 2024, 14:23 | 0.16 | 0.16 mg/l |
| 1 Feb 2024, 12:48 | 0.058 | 0.058 mg/l |
| 12 Jan 2024, 10:17 | 0.039 | 0.039 mg/l |
| 5 Dec 2023, 12:10 | 0.012 | 0.012 mg/l |
| 7 Nov 2023, 13:00 | 0.013 | 0.013 mg/l |
| 24 Oct 2023, 12:45 | 0.069 | 0.069 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
127 µS/cm
Sampled 7 Sep 2026, 24 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:24 | 127 | 127 µS/cm |
| 5 Aug 2026, 13:23 | 114 | 114 µS/cm |
| 16 Jul 2026, 10:25 | 95 | 95 µS/cm |
| 8 Jun 2026, 14:52 | 57 | 57 µS/cm |
| 11 May 2026, 12:32 | 118 | 118 µS/cm |
| 27 Apr 2026, 11:52 | 99 | 99 µS/cm |
| 31 Mar 2025, 12:00 | 122 | 122 µS/cm |
| 4 Feb 2025, 10:06 | 119 | 119 µS/cm |
| 15 Jan 2025, 13:11 | 120 | 120 µS/cm |
| 10 Dec 2024, 13:06 | 107 | 107 µS/cm |
| 26 Nov 2024, 14:05 | 118 | 118 µS/cm |
| 29 Oct 2024, 13:22 | 106 | 106 µS/cm |
| 5 Sep 2024, 12:10 | 109 | 109 µS/cm |
| 6 Aug 2024, 10:36 | 103 | 103 µS/cm |
| 9 Jul 2024, 11:18 | 143 | 143 µS/cm |
| 19 Jun 2024, 11:45 | 111 | 111 µS/cm |
| 30 May 2024, 14:23 | 107 | 107 µS/cm |
| 1 Feb 2024, 12:48 | 115 | 115 µS/cm |
| 12 Jan 2024, 10:17 | 118 | 118 µS/cm |
| 5 Dec 2023, 12:10 | 58 | 58 µS/cm |
| 7 Nov 2023, 13:00 | 85 | 85 µS/cm |
| 24 Oct 2023, 12:45 | 87 | 87 µS/cm |
E. coli
confirmed, membrane filtration · code 2348 · per 100 ml
2400 per 100 ml
Sampled 5 Dec 2023, 2.8 years ago · 3 results banked
Every result (3)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Dec 2023, 12:10 | 2400 | 2400 per 100 ml |
| 7 Nov 2023, 13:00 | 3000 | 3000 per 100 ml |
| 24 Oct 2023, 12:45 | 2500 | 2500 per 100 ml |
Everything measured here
15 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 15 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 22 | Oct 2023 – Sep 2026 | 99.3% 7 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | Oct 2023 – Sep 2026 | 9.65 mg/l 7 Sep 2026 |
| Temperature of Water 0076 | River water | 22 | Oct 2023 – Sep 2026 | 16.6 °C 7 Sep 2026 |
| pH 0061 | River water | 22 | Oct 2023 – Sep 2026 | 7.74 7 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 22 | Oct 2023 – Sep 2026 | below 0.03 mg/l 7 Sep 2026 |
| Nitrate as N 0117 | River water | 22 | Oct 2023 – Sep 2026 | 0.976 mg/l 7 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 22 | Oct 2023 – Sep 2026 | 0.25 mg/l 7 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 22 | Oct 2023 – Sep 2026 | 127 µS/cm 7 Sep 2026 |
| Escherichia coli : Confirmed : MF 2348 | River water | 3 | Oct 2023 – Dec 2023 | 2400 per 100 ml 5 Dec 2023 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 21 | Oct 2023 – Sep 2026 | 12 mg/l 7 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Oct 2023 – Sep 2026 | below 0.00049 mg/l 7 Sep 2026 |
| Enterococci: Intestinal: Confirmed: MF 3723 | River water | 3 | Oct 2023 – Dec 2023 | 29000 colony forming units / 100ml 5 Dec 2023 |
| Enterococci: Intestinal: Presumptive: MF 3722 | River water | 3 | Oct 2023 – Dec 2023 | 29000 colony forming units / 100ml 5 Dec 2023 |
| Nitrite as N 0118 | River water | 22 | Oct 2023 – Sep 2026 | below 0.004 mg/l 7 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 22 | Oct 2023 – Sep 2026 | 0.98 mg/l 7 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.