River Claw at Clawton Bridge
EA name: RIVER CLAW AT CLAWTON BRIDGE
Environment Agency sampling point SW-81201143 · 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
- 1 Sep 2026, 09:1130 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 20 since 12 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 235330, 99320As published, to the nearest 10 m. Open in a map
- River, by its own name
- Claw
- River, by the map
- River ClawPlaced on the river its name gives, 11 m from the line.
- Next gauge downstream
- Polson Bridge On the River Tamar · 21 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (13 samples)
Planned investigation (local monitoring) (7 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
84.7%
Sampled 1 Sep 2026, 30 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 09:11 | 84.7 | 84.7% |
| 14 Aug 2026, 12:53 | 77.2 | 77.2% |
| 14 Jul 2026, 12:33 | 98 | 98% |
| 8 Jun 2026, 14:11 | 95.7 | 95.7% |
| 21 May 2026, 12:13 | 100.9 | 100.9% |
| 17 Apr 2026, 11:53 | 99.2 | 99.2% |
| 5 Dec 2024, 12:10 | 97 | 97% |
| 4 Nov 2024, 12:51 | 94 | 94% |
| 2 Oct 2024, 12:05 | 95 | 95% |
| 18 Sep 2024, 11:39 | 93.8 | 93.8% |
| 2 Aug 2024, 13:35 | 100.3 | 100.3% |
| 11 Jul 2024, 08:45 | 92.9 | 92.9% |
| 3 Jun 2024, 10:11 | 97.7 | 97.7% |
| 6 Mar 2024, 10:14 | 97.7 | 97.7% |
| 1 Feb 2024, 13:03 | 97.8 | 97.8% |
| 17 Jan 2024, 12:47 | 98.5 | 98.5% |
| 15 Dec 2023, 13:44 | 96.5 | 96.5% |
| 5 Dec 2023, 10:28 | 96.6 | 96.6% |
| 3 Nov 2023, 11:18 | 91.3 | 91.3% |
| 12 Oct 2023, 13:40 | 93.2 | 93.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.65 mg/l
Sampled 1 Sep 2026, 30 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 09:11 | 8.65 | 8.65 mg/l |
| 14 Aug 2026, 12:53 | 7.13 | 7.13 mg/l |
| 14 Jul 2026, 12:33 | 8.98 | 8.98 mg/l |
| 8 Jun 2026, 14:11 | 9.86 | 9.86 mg/l |
| 21 May 2026, 12:13 | 10.4 | 10.4 mg/l |
| 17 Apr 2026, 11:53 | 10.7 | 10.7 mg/l |
| 5 Dec 2024, 12:10 | 10.7 | 10.7 mg/l |
| 4 Nov 2024, 12:51 | 10.3 | 10.3 mg/l |
| 2 Oct 2024, 12:05 | 10.1 | 10.1 mg/l |
| 18 Sep 2024, 11:39 | 9.88 | 9.88 mg/l |
| 2 Aug 2024, 13:35 | 9.71 | 9.71 mg/l |
| 11 Jul 2024, 08:45 | 9.63 | 9.63 mg/l |
| 3 Jun 2024, 10:11 | 9.96 | 9.96 mg/l |
| 6 Mar 2024, 10:14 | 12.3 | 12.3 mg/l |
| 1 Feb 2024, 13:03 | 11.6 | 11.6 mg/l |
| 17 Jan 2024, 12:47 | 13.2 | 13.2 mg/l |
| 15 Dec 2023, 13:44 | 11.2 | 11.2 mg/l |
| 5 Dec 2023, 10:28 | 11.7 | 11.7 mg/l |
| 3 Nov 2023, 11:18 | 10.2 | 10.2 mg/l |
| 12 Oct 2023, 13:40 | 9.21 | 9.21 mg/l |
Water temperature
code 0076 · °C
14.3 °C
Sampled 1 Sep 2026, 30 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 09:11 | 14.3 | 14.3 °C |
| 14 Aug 2026, 12:53 | 19.1 | 19.1 °C |
| 14 Jul 2026, 12:33 | 19.5 | 19.5 °C |
| 8 Jun 2026, 14:11 | 13.9 | 13.9 °C |
| 21 May 2026, 12:13 | 13.7 | 13.7 °C |
| 17 Apr 2026, 11:53 | 11.8 | 11.8 °C |
| 5 Dec 2024, 12:10 | 10.8 | 10.8 °C |
| 4 Nov 2024, 12:51 | 11.2 | 11.2 °C |
| 2 Oct 2024, 12:05 | 12.4 | 12.4 °C |
| 18 Sep 2024, 11:39 | 12.9 | 12.9 °C |
| 2 Aug 2024, 13:35 | 16.8 | 16.8 °C |
| 11 Jul 2024, 08:45 | 13.6 | 13.6 °C |
| 3 Jun 2024, 10:11 | 14.4 | 14.4 °C |
| 6 Mar 2024, 10:14 | 5.6 | 5.6 °C |
| 1 Feb 2024, 13:03 | 7.9 | 7.9 °C |
| 17 Jan 2024, 12:47 | 3 | 3 °C |
| 15 Dec 2023, 13:44 | 8.6 | 8.6 °C |
| 5 Dec 2023, 10:28 | 7 | 7 °C |
| 3 Nov 2023, 11:18 | 10.3 | 10.3 °C |
| 12 Oct 2023, 13:40 | 15.8 | 15.8 °C |
pH
code 0061
7.28
Sampled 1 Sep 2026, 30 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 09:11 | 7.28 | 7.28 |
| 14 Aug 2026, 12:53 | 7.39 | 7.39 |
| 14 Jul 2026, 12:33 | 7.42 | 7.42 |
| 8 Jun 2026, 14:11 | 7.14 | 7.14 |
| 21 May 2026, 12:13 | 7.39 | 7.39 |
| 17 Apr 2026, 11:53 | 7.53 | 7.53 |
| 5 Dec 2024, 12:10 | 7.1 | 7.1 |
| 4 Nov 2024, 12:51 | 7.32 | 7.32 |
| 2 Oct 2024, 12:05 | 7.26 | 7.26 |
| 18 Sep 2024, 11:39 | 7.28 | 7.28 |
| 2 Aug 2024, 13:35 | 7.67 | 7.67 |
| 11 Jul 2024, 08:45 | 7.07 | 7.07 |
| 3 Jun 2024, 10:11 | 7.95 | 7.95 |
| 6 Mar 2024, 10:14 | 7.08 | 7.08 |
| 1 Feb 2024, 13:03 | 7.28 | 7.28 |
| 17 Jan 2024, 12:47 | 7.35 | 7.35 |
| 15 Dec 2023, 13:44 | 7.2 | 7.2 |
| 5 Dec 2023, 10:28 | 7.08 | 7.08 |
| 3 Nov 2023, 11:18 | 7.1 | 7.1 |
| 12 Oct 2023, 13:40 | 7.43 | 7.43 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.031 mg/l
Sampled 1 Sep 2026, 30 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 09:11 | 0.031 | 0.031 mg/l |
| 14 Aug 2026, 12:53 | 0.034 | 0.034 mg/l |
| 14 Jul 2026, 12:33 | 0.045 | 0.045 mg/l |
| 8 Jun 2026, 14:11 | 0.17 | 0.17 mg/l |
| 21 May 2026, 12:13 | 0.035 | 0.035 mg/l |
| 17 Apr 2026, 11:53 | 0.062 | 0.062 mg/l |
| 5 Dec 2024, 12:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Nov 2024, 12:51 | 0.12 | 0.12 mg/l |
| 2 Oct 2024, 12:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Sep 2024, 11:39 | 0.033 | 0.033 mg/l |
| 2 Aug 2024, 13:35 | 0.041 | 0.041 mg/l |
| 11 Jul 2024, 08:45 | 0.056 | 0.056 mg/l |
| 3 Jun 2024, 10:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Mar 2024, 10:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Feb 2024, 13:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jan 2024, 12:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Dec 2023, 13:44 | 0.048 | 0.048 mg/l |
| 5 Dec 2023, 10:28 | 0.039 | 0.039 mg/l |
| 3 Nov 2023, 11:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Oct 2023, 13:40 | 0.034 | 0.034 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.96 mg/l
Sampled 1 Sep 2026, 30 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 09:11 | 1.96 | 1.96 mg/l |
| 14 Aug 2026, 12:53 | 1.77 | 1.77 mg/l |
| 14 Jul 2026, 12:33 | 1.09 | 1.09 mg/l |
| 8 Jun 2026, 14:11 | 0.72 | 0.72 mg/l |
| 21 May 2026, 12:13 | 0.764 | 0.764 mg/l |
| 17 Apr 2026, 11:53 | 0.574 | 0.574 mg/l |
| 5 Dec 2024, 12:10 | 0.366 | 0.366 mg/l |
| 4 Nov 2024, 12:51 | 0.779 | 0.779 mg/l |
| 2 Oct 2024, 12:05 | 1.1 | 1.1 mg/l |
| 18 Sep 2024, 11:39 | 0.865 | 0.865 mg/l |
| 2 Aug 2024, 13:35 | 1.66 | 1.66 mg/l |
| 11 Jul 2024, 08:45 | 0.562 | 0.562 mg/l |
| 3 Jun 2024, 10:11 | 1.18 | 1.18 mg/l |
| 6 Mar 2024, 10:14 | 0.986 | 0.986 mg/l |
| 1 Feb 2024, 13:03 | 0.576 | 0.576 mg/l |
| 17 Jan 2024, 12:47 | 0.836 | 0.836 mg/l |
| 15 Dec 2023, 13:44 | 0.966 | 0.966 mg/l |
| 5 Dec 2023, 10:28 | 0.456 | 0.456 mg/l |
| 3 Nov 2023, 11:18 | 1.3 | 1.3 mg/l |
| 12 Oct 2023, 13:40 | 0.636 | 0.636 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.1 mg/l
Sampled 1 Sep 2026, 30 days ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 09:11 | 0.1 | 0.1 mg/l |
| 14 Jul 2026, 12:33 | 0.059 | 0.059 mg/l |
| 8 Jun 2026, 14:11 | 0.043 | 0.043 mg/l |
| 21 May 2026, 12:13 | 0.028 | 0.028 mg/l |
| 17 Apr 2026, 11:53 | 0.03 | 0.03 mg/l |
| 5 Dec 2024, 12:10 | 0.033 | 0.033 mg/l |
| 4 Nov 2024, 12:51 | 0.03 | 0.03 mg/l |
| 2 Oct 2024, 12:05 | 0.035 | 0.035 mg/l |
| 18 Sep 2024, 11:39 | 0.053 | 0.053 mg/l |
| 2 Aug 2024, 13:35 | 0.083 | 0.083 mg/l |
| 11 Jul 2024, 08:45 | 0.043 | 0.043 mg/l |
| 3 Jun 2024, 10:11 | 0.038 | 0.038 mg/l |
| 6 Mar 2024, 10:14 | 0.019 | 0.019 mg/l |
| 1 Feb 2024, 13:03 | 0.014 | 0.014 mg/l |
| 17 Jan 2024, 12:47 | 0.015 | 0.015 mg/l |
| 15 Dec 2023, 13:44 | <0.01 | below 0.01 mg/l (not detected above this) |
| 5 Dec 2023, 10:28 | 0.021 | 0.021 mg/l |
| 3 Nov 2023, 11:18 | 0.025 | 0.025 mg/l |
| 12 Oct 2023, 13:40 | 0.032 | 0.032 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
235 µS/cm
Sampled 1 Sep 2026, 30 days ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 09:11 | 235 | 235 µS/cm |
| 14 Aug 2026, 12:53 | 298 | 298 µS/cm |
| 14 Jul 2026, 12:33 | 259 | 259 µS/cm |
| 8 Jun 2026, 14:11 | 135 | 135 µS/cm |
| 21 May 2026, 12:13 | 168 | 168 µS/cm |
| 17 Apr 2026, 11:53 | 178 | 178 µS/cm |
| 5 Dec 2024, 12:10 | 117 | 117 µS/cm |
| 4 Nov 2024, 12:51 | 175 | 175 µS/cm |
| 2 Oct 2024, 12:05 | 158 | 158 µS/cm |
| 18 Sep 2024, 11:39 | 192 | 192 µS/cm |
| 2 Aug 2024, 13:35 | 225 | 225 µS/cm |
| 11 Jul 2024, 08:45 | 144 | 144 µS/cm |
| 3 Jun 2024, 10:11 | 197 | 197 µS/cm |
| 6 Mar 2024, 10:14 | 141 | 141 µS/cm |
| 1 Feb 2024, 13:03 | 165 | 165 µS/cm |
| 17 Jan 2024, 12:47 | 180 | 180 µS/cm |
| 15 Dec 2023, 13:44 | 157 | 157 µS/cm |
| 5 Dec 2023, 10:28 | 115 | 115 µS/cm |
| 3 Nov 2023, 11:18 | 154 | 154 µS/cm |
| 12 Oct 2023, 13:40 | 168 | 168 µS/cm |
Everything measured here
13 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 13 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 20 | Oct 2023 – Sep 2026 | 84.7% 1 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 20 | Oct 2023 – Sep 2026 | 8.65 mg/l 1 Sep 2026 |
| Temperature of Water 0076 | River water | 20 | Oct 2023 – Sep 2026 | 14.3 °C 1 Sep 2026 |
| pH 0061 | River water | 20 | Oct 2023 – Sep 2026 | 7.28 1 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 20 | Oct 2023 – Sep 2026 | 0.031 mg/l 1 Sep 2026 |
| Nitrate as N 0117 | River water | 20 | Oct 2023 – Sep 2026 | 1.96 mg/l 1 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 19 | Oct 2023 – Sep 2026 | 0.1 mg/l 1 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 20 | Oct 2023 – Sep 2026 | 235 µS/cm 1 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 20 | Oct 2023 – Sep 2026 | 32 mg/l 1 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 20 | Oct 2023 – Sep 2026 | 0.00015 mg/l 1 Sep 2026 |
| Nitrite as N 0118 | River water | 20 | Oct 2023 – Sep 2026 | 0.039 mg/l 1 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 20 | Oct 2023 – Sep 2026 | 2 mg/l 1 Sep 2026 |
| Solids, Suspended at 105 C 0135 | River water | 7 | Oct 2023 – Mar 2024 | 8.5 mg/l 6 Mar 2024 |
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.