River Otter downstream of Otterhead 1 Reservoir
EA name: RIVER OTTER D/S OTTERHEAD 1 RESERVOIR (also listed as “RIVER OTTER DOWNSTREAM OTTERHEAD 1 RESERVOIR”)
Environment Agency sampling point SW-70420286 · 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 May 2026, 13:245 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone). Not sampled since, as far as the archive shows: the Environment Agency was asked up to 30 Sep 2026 and had nothing newer.
- Samples banked
- 24 since 18 Jun 2024 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 322600, 113200As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Otter
- River, by the map
- River OtterPlaced on the river its name gives, 91 m from the line.
- Next gauge downstream
- Fenny Bridges On the River Otter · 24 km along the river
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
102%
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 13:24 | 102 | 102% |
| 14 Apr 2026, 10:10 | 100.9 | 100.9% |
| 10 Mar 2026, 12:17 | 100.1 | 100.1% |
| 5 Feb 2026, 10:30 | 98.6 | 98.6% |
| 8 Jan 2026, 11:18 | 93.3 | 93.3% |
| 17 Dec 2025, 10:26 | 99.6 | 99.6% |
| 12 Dec 2025, 11:54 | 100.2 | 100.2% |
| 14 Oct 2025, 11:45 | 92.1 | 92.1% |
| 5 Sep 2025, 13:25 | 100 | 100% |
| 4 Aug 2025, 12:53 | 103.7 | 103.7% |
| 14 Jul 2025, 12:57 | 94.5 | 94.5% |
| 6 Jun 2025, 09:27 | 91.8 | 91.8% |
| 13 May 2025, 12:30 | 100.2 | 100.2% |
| 10 Apr 2025, 14:19 | 107.7 | 107.7% |
| 20 Mar 2025, 12:45 | 108.9 | 108.9% |
| 3 Feb 2025, 11:35 | 98.5 | 98.5% |
| 20 Jan 2025, 14:25 | 100 | 100% |
| 3 Dec 2024, 11:15 | 99.2 | 99.2% |
| 19 Nov 2024, 12:50 | 96.8 | 96.8% |
| 24 Oct 2024, 10:39 | 98.9 | 98.9% |
| 16 Sep 2024, 11:23 | 102.3 | 102.3% |
| 23 Aug 2024, 11:48 | 99.9 | 99.9% |
| 16 Jul 2024, 13:03 | 100.5 | 100.5% |
| 18 Jun 2024, 10:16 | 102 | 102% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.9 mg/l
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 13:24 | 10.9 | 10.9 mg/l |
| 14 Apr 2026, 10:10 | 11.5 | 11.5 mg/l |
| 10 Mar 2026, 12:17 | 11.5 | 11.5 mg/l |
| 5 Feb 2026, 10:30 | 11.7 | 11.7 mg/l |
| 8 Jan 2026, 11:18 | 11.8 | 11.8 mg/l |
| 17 Dec 2025, 10:26 | 11.4 | 11.4 mg/l |
| 12 Dec 2025, 11:54 | 11.3 | 11.3 mg/l |
| 14 Oct 2025, 11:45 | 9.93 | 9.93 mg/l |
| 5 Sep 2025, 13:25 | 10.4 | 10.4 mg/l |
| 4 Aug 2025, 12:53 | 10.3 | 10.3 mg/l |
| 14 Jul 2025, 12:57 | 9.46 | 9.46 mg/l |
| 6 Jun 2025, 09:27 | 9.87 | 9.87 mg/l |
| 13 May 2025, 12:30 | 10.3 | 10.3 mg/l |
| 10 Apr 2025, 14:19 | 11.7 | 11.7 mg/l |
| 20 Mar 2025, 12:45 | 12.4 | 12.4 mg/l |
| 3 Feb 2025, 11:35 | 11.7 | 11.7 mg/l |
| 20 Jan 2025, 14:25 | 12.2 | 12.2 mg/l |
| 3 Dec 2024, 11:15 | 11.6 | 11.6 mg/l |
| 19 Nov 2024, 12:50 | 11.1 | 11.1 mg/l |
| 24 Oct 2024, 10:39 | 10.8 | 10.8 mg/l |
| 16 Sep 2024, 11:23 | 10.8 | 10.8 mg/l |
| 23 Aug 2024, 11:48 | 9.98 | 9.98 mg/l |
| 16 Jul 2024, 13:03 | 10.4 | 10.4 mg/l |
| 18 Jun 2024, 10:16 | 10.6 | 10.6 mg/l |
Water temperature
code 0076 · °C
12.1 °C
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 13:24 | 12.1 | 12.1 °C |
| 14 Apr 2026, 10:10 | 9.5 | 9.5 °C |
| 10 Mar 2026, 12:17 | 9.2 | 9.2 °C |
| 5 Feb 2026, 10:30 | 8 | 8 °C |
| 8 Jan 2026, 11:18 | 5.4 | 5.4 °C |
| 17 Dec 2025, 10:26 | 9.2 | 9.2 °C |
| 12 Dec 2025, 11:54 | 10 | 10 °C |
| 14 Oct 2025, 11:45 | 11.9 | 11.9 °C |
| 5 Sep 2025, 13:25 | 13.3 | 13.3 °C |
| 4 Aug 2025, 12:53 | 15.5 | 15.5 °C |
| 14 Jul 2025, 12:57 | 15.2 | 15.2 °C |
| 6 Jun 2025, 09:27 | 12 | 12 °C |
| 13 May 2025, 12:30 | 14 | 14 °C |
| 10 Apr 2025, 14:19 | 11.5 | 11.5 °C |
| 20 Mar 2025, 12:45 | 9.6 | 9.6 °C |
| 3 Feb 2025, 11:35 | 7.9 | 7.9 °C |
| 20 Jan 2025, 14:25 | 6.7 | 6.7 °C |
| 3 Dec 2024, 11:15 | 8.4 | 8.4 °C |
| 19 Nov 2024, 12:50 | 9.4 | 9.4 °C |
| 24 Oct 2024, 10:39 | 11.3 | 11.3 °C |
| 16 Sep 2024, 11:23 | 12.7 | 12.7 °C |
| 23 Aug 2024, 11:48 | 15.3 | 15.3 °C |
| 16 Jul 2024, 13:03 | 13.7 | 13.7 °C |
| 18 Jun 2024, 10:16 | 13.5 | 13.5 °C |
pH
code 0061
7.72
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 13:24 | 7.72 | 7.72 |
| 14 Apr 2026, 10:10 | 7.51 | 7.51 |
| 10 Mar 2026, 12:17 | 7.65 | 7.65 |
| 5 Feb 2026, 10:30 | 7.46 | 7.46 |
| 8 Jan 2026, 11:18 | 7.73 | 7.73 |
| 17 Dec 2025, 10:26 | 7.29 | 7.29 |
| 12 Dec 2025, 11:54 | 7.13 | 7.13 |
| 14 Oct 2025, 11:45 | 7.43 | 7.43 |
| 5 Sep 2025, 13:25 | 7.33 | 7.33 |
| 4 Aug 2025, 12:53 | 7.78 | 7.78 |
| 14 Jul 2025, 12:57 | 7.64 | 7.64 |
| 6 Jun 2025, 09:27 | 8.13 | 8.13 |
| 13 May 2025, 12:30 | 8.35 | 8.35 |
| 10 Apr 2025, 14:19 | 8.41 | 8.41 |
| 20 Mar 2025, 12:45 | 8.02 | 8.02 |
| 3 Feb 2025, 11:35 | 7.71 | 7.71 |
| 20 Jan 2025, 14:25 | 7.55 | 7.55 |
| 3 Dec 2024, 11:15 | 7.65 | 7.65 |
| 19 Nov 2024, 12:50 | 7.47 | 7.47 |
| 24 Oct 2024, 10:39 | 7.47 | 7.47 |
| 16 Sep 2024, 11:23 | 7.81 | 7.81 |
| 23 Aug 2024, 11:48 | 8.02 | 8.02 |
| 16 Jul 2024, 13:03 | 7.57 | 7.57 |
| 18 Jun 2024, 10:16 | 7.87 | 7.87 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 7 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 13:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Apr 2026, 10:10 | 0.098 | 0.098 mg/l |
| 10 Mar 2026, 12:17 | 0.051 | 0.051 mg/l |
| 5 Feb 2026, 10:30 | 0.04 | 0.04 mg/l |
| 8 Jan 2026, 11:18 | 0.043 | 0.043 mg/l |
| 17 Dec 2025, 10:26 | 0.04 | 0.04 mg/l |
| 12 Dec 2025, 11:54 | 0.034 | 0.034 mg/l |
| 5 Sep 2025, 13:25 | 0.075 | 0.075 mg/l |
| 4 Aug 2025, 12:53 | 0.031 | 0.031 mg/l |
| 14 Jul 2025, 12:57 | 0.084 | 0.084 mg/l |
| 6 Jun 2025, 09:27 | 0.068 | 0.068 mg/l |
| 13 May 2025, 12:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Apr 2025, 14:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Mar 2025, 12:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Feb 2025, 11:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jan 2025, 14:25 | 0.11 | 0.11 mg/l |
| 3 Dec 2024, 11:15 | 0.038 | 0.038 mg/l |
| 19 Nov 2024, 12:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Oct 2024, 10:39 | 0.043 | 0.043 mg/l |
| 16 Sep 2024, 11:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Aug 2024, 11:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jul 2024, 13:03 | 0.041 | 0.041 mg/l |
| 18 Jun 2024, 10:16 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.39 mg/l
Sampled 7 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 13:24 | 3.39 | 3.39 mg/l |
| 14 Apr 2026, 10:10 | 3.18 | 3.18 mg/l |
| 10 Mar 2026, 12:17 | 3.69 | 3.69 mg/l |
| 5 Feb 2026, 10:30 | 2.9 | 2.9 mg/l |
| 8 Jan 2026, 11:18 | 3.69 | 3.69 mg/l |
| 17 Dec 2025, 10:26 | 4.9 | 4.9 mg/l |
| 12 Dec 2025, 11:54 | 5.4 | 5.4 mg/l |
| 5 Sep 2025, 13:25 | 2.47 | 2.47 mg/l |
| 4 Aug 2025, 12:53 | 2.77 | 2.77 mg/l |
| 14 Jul 2025, 12:57 | 2.77 | 2.77 mg/l |
| 6 Jun 2025, 09:27 | 2.88 | 2.88 mg/l |
| 13 May 2025, 12:30 | 2.99 | 2.99 mg/l |
| 10 Apr 2025, 14:19 | 3.29 | 3.29 mg/l |
| 20 Mar 2025, 12:45 | 3.59 | 3.59 mg/l |
| 3 Feb 2025, 11:35 | 3.79 | 3.79 mg/l |
| 20 Jan 2025, 14:25 | 3.79 | 3.79 mg/l |
| 19 Nov 2024, 12:50 | 3.29 | 3.29 mg/l |
| 24 Oct 2024, 10:39 | 3.78 | 3.78 mg/l |
| 16 Sep 2024, 11:23 | 3.08 | 3.08 mg/l |
| 23 Aug 2024, 11:48 | 2.98 | 2.98 mg/l |
| 16 Jul 2024, 13:03 | 2.98 | 2.98 mg/l |
| 18 Jun 2024, 10:16 | 3.39 | 3.39 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.021 mg/l
Sampled 7 May 2026, 5 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 13:24 | 0.021 | 0.021 mg/l |
| 14 Apr 2026, 10:10 | 0.031 | 0.031 mg/l |
| 10 Mar 2026, 12:17 | 0.042 | 0.042 mg/l |
| 5 Feb 2026, 10:30 | 0.044 | 0.044 mg/l |
| 8 Jan 2026, 11:18 | 0.036 | 0.036 mg/l |
| 17 Dec 2025, 10:26 | 0.048 | 0.048 mg/l |
| 12 Dec 2025, 11:54 | 0.049 | 0.049 mg/l |
| 5 Sep 2025, 13:25 | 0.038 | 0.038 mg/l |
| 4 Aug 2025, 12:53 | 0.028 | 0.028 mg/l |
| 14 Jul 2025, 12:57 | 0.036 | 0.036 mg/l |
| 6 Jun 2025, 09:27 | 0.034 | 0.034 mg/l |
| 13 May 2025, 12:30 | 0.025 | 0.025 mg/l |
| 10 Apr 2025, 14:19 | <0.01 | below 0.01 mg/l (not detected above this) |
| 20 Mar 2025, 12:45 | 0.017 | 0.017 mg/l |
| 3 Feb 2025, 11:35 | 0.033 | 0.033 mg/l |
| 20 Jan 2025, 14:25 | 0.044 | 0.044 mg/l |
| 19 Nov 2024, 12:50 | 0.03 | 0.03 mg/l |
| 24 Oct 2024, 10:39 | 0.037 | 0.037 mg/l |
| 16 Sep 2024, 11:23 | 0.029 | 0.029 mg/l |
| 23 Aug 2024, 11:48 | 0.026 | 0.026 mg/l |
| 16 Jul 2024, 13:03 | 0.027 | 0.027 mg/l |
| 18 Jun 2024, 10:16 | 0.02 | 0.02 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
190 µS/cm
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 13:24 | 190 | 190 µS/cm |
| 14 Apr 2026, 10:10 | 172 | 172 µS/cm |
| 10 Mar 2026, 12:17 | 195 | 195 µS/cm |
| 5 Feb 2026, 10:30 | 169 | 169 µS/cm |
| 8 Jan 2026, 11:18 | 194 | 194 µS/cm |
| 17 Dec 2025, 10:26 | 146 | 146 µS/cm |
| 12 Dec 2025, 11:54 | 154 | 154 µS/cm |
| 14 Oct 2025, 11:45 | 200 | 200 µS/cm |
| 5 Sep 2025, 13:25 | 184 | 184 µS/cm |
| 4 Aug 2025, 12:53 | 197 | 197 µS/cm |
| 14 Jul 2025, 12:57 | 187 | 187 µS/cm |
| 6 Jun 2025, 09:27 | 193 | 193 µS/cm |
| 13 May 2025, 12:30 | 192 | 192 µS/cm |
| 10 Apr 2025, 14:19 | 192 | 192 µS/cm |
| 20 Mar 2025, 12:45 | 197 | 197 µS/cm |
| 3 Feb 2025, 11:35 | 197 | 197 µS/cm |
| 20 Jan 2025, 14:25 | 197 | 197 µS/cm |
| 3 Dec 2024, 11:15 | 191 | 191 µS/cm |
| 19 Nov 2024, 12:50 | 184 | 184 µS/cm |
| 24 Oct 2024, 10:39 | 189 | 189 µS/cm |
| 16 Sep 2024, 11:23 | 193 | 193 µS/cm |
| 23 Aug 2024, 11:48 | 191 | 191 µS/cm |
| 16 Jul 2024, 13:03 | 188 | 188 µS/cm |
| 18 Jun 2024, 10:16 | 193 | 193 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 | 24 | Jun 2024 – May 2026 | 102% 7 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Jun 2024 – May 2026 | 10.9 mg/l 7 May 2026 |
| Temperature of Water 0076 | River water | 24 | Jun 2024 – May 2026 | 12.1 °C 7 May 2026 |
| pH 0061 | River water | 24 | Jun 2024 – May 2026 | 7.72 7 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 23 | Jun 2024 – May 2026 | below 0.03 mg/l 7 May 2026 |
| Nitrate as N 0117 | River water | 22 | Jun 2024 – May 2026 | 3.39 mg/l 7 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 22 | Jun 2024 – May 2026 | 0.021 mg/l 7 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Jun 2024 – May 2026 | 190 µS/cm 7 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 23 | Jun 2024 – May 2026 | 43 mg/l 7 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 23 | Jun 2024 – May 2026 | below 0.00034 mg/l 7 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 21 | Jun 2024 – May 2026 | 1.1 mg/l 7 May 2026 |
| Nitrite as N 0118 | River water | 23 | Jun 2024 – May 2026 | 0.015 mg/l 7 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 22 | Jun 2024 – May 2026 | 3.4 mg/l 7 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.