River Otter at Cottarson Farm

EA name: RIVER OTTER AT COTTARSON FARM
Environment Agency sampling point SW-70420211 · 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
10 Sep 2026, 11:4028 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
Samples banked
3 since 14 Jul 2026 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
Latest sample
River / running surface water Environmental monitoring statutory (EU directives) · results completed 16 Sep 2026
Where
National Grid 314817, 100735As published, to the nearest 1 m. Open in a map
River, by its own name
Otter
River, by the map
River OtterPlaced on the river its name gives, 4 m from the line.
Next gauge downstream
Fenny Bridges On the River Otter · 5.2 km along the river
Nearest gauge upstream
Honiton On the Gissage · 2.1 km along the river
Why it was sampled
Environmental monitoring statutory (EU directives) (3 samples)

Results here were completed a median of 4 days after the sample was taken (2 to 6 days, 3 samples).

Main measurements, river water

Dissolved oxygen

% saturation · code 9901 · %

100.1%

Sampled 10 Sep 2026, 28 days ago · 3 results banked

100102.5105107.5110%20242025202614 Jul 2026, 11:19: 100.6%7 Aug 2026, 15:03: 109.5%10 Sep 2026, 11:40: 100.1%
Every result (3)
SampledResult as publishedReads as
10 Sep 2026, 11:40100.1 100.1%
7 Aug 2026, 15:03109.5 109.5%
14 Jul 2026, 11:19100.6 100.6%

Dissolved oxygen

as O2 · code 9924 · mg/l

10.2 mg/l

Sampled 10 Sep 2026, 28 days ago · 3 results banked

99.51010.5mg/l20242025202614 Jul 2026, 11:19: 9.09 mg/l7 Aug 2026, 15:03: 10.4 mg/l10 Sep 2026, 11:40: 10.2 mg/l
Every result (3)
SampledResult as publishedReads as
10 Sep 2026, 11:4010.2 10.2 mg/l
7 Aug 2026, 15:0310.4 10.4 mg/l
14 Jul 2026, 11:199.09 9.09 mg/l

Water temperature

code 0076 · °C

14.2 °C

Sampled 10 Sep 2026, 28 days ago · 3 results banked

1416182022°C20242025202614 Jul 2026, 11:19: 20.2 °C7 Aug 2026, 15:03: 17.7 °C10 Sep 2026, 11:40: 14.2 °C
Every result (3)
SampledResult as publishedReads as
10 Sep 2026, 11:4014.2 14.2 °C
7 Aug 2026, 15:0317.7 17.7 °C
14 Jul 2026, 11:1920.2 20.2 °C

pH

code 0061

8.01

Sampled 10 Sep 2026, 28 days ago · 3 results banked

7.957.97588.0258.058.07520242025202614 Jul 2026, 11:19: 7.977 Aug 2026, 15:03: 8.0610 Sep 2026, 11:40: 8.01
Every result (3)
SampledResult as publishedReads as
10 Sep 2026, 11:408.01 8.01
7 Aug 2026, 15:038.06 8.06
14 Jul 2026, 11:197.97 7.97

Ammonia

ammoniacal nitrogen as N · code 0111 · mg/l

below 0.03 mg/l (not detected above this)

Sampled 10 Sep 2026, 28 days ago · 3 results banked

0.030.0350.04mg/l20242025202614 Jul 2026, 11:19: below 0.03 mg/l (not detected above this)7 Aug 2026, 15:03: 0.04 mg/l10 Sep 2026, 11:40: below 0.03 mg/l (not detected above this)
Every result (3)
SampledResult as publishedReads as
10 Sep 2026, 11:40<0.03 below 0.03 mg/l (not detected above this)
7 Aug 2026, 15:030.04 0.04 mg/l
14 Jul 2026, 11:19<0.03 below 0.03 mg/l (not detected above this)

Nitrate

as nitrogen (N) · code 0117 · mg/l

3.9 mg/l

Sampled 10 Sep 2026, 28 days ago · 3 results banked

3.544.555.5mg/l20242025202614 Jul 2026, 11:19: 5.09 mg/l7 Aug 2026, 15:03: 4.29 mg/l10 Sep 2026, 11:40: 3.9 mg/l
Every result (3)
SampledResult as publishedReads as
10 Sep 2026, 11:403.9 3.9 mg/l
7 Aug 2026, 15:034.29 4.29 mg/l
14 Jul 2026, 11:195.09 5.09 mg/l

Phosphate

orthophosphate, reactive, as P · code 0180 · mg/l

0.095 mg/l

Sampled 10 Sep 2026, 28 days ago · 3 results banked

00.10.20.30.4mg/l20242025202614 Jul 2026, 11:19: 0.34 mg/l7 Aug 2026, 15:03: 0.16 mg/l10 Sep 2026, 11:40: 0.095 mg/l
Every result (3)
SampledResult as publishedReads as
10 Sep 2026, 11:400.095 0.095 mg/l
7 Aug 2026, 15:030.16 0.16 mg/l
14 Jul 2026, 11:190.34 0.34 mg/l

Conductivity

at 25 °C · code 0077 · µS/cm

395 µS/cm

Sampled 10 Sep 2026, 28 days ago · 3 results banked

385387.5390392.5395µS/cm20242025202614 Jul 2026, 11:19: 385 µS/cm7 Aug 2026, 15:03: 386 µS/cm10 Sep 2026, 11:40: 395 µS/cm
Every result (3)
SampledResult as publishedReads as
10 Sep 2026, 11:40395 395 µS/cm
7 Aug 2026, 15:03386 386 µS/cm
14 Jul 2026, 11:19385 385 µS/cm

Everything measured here

12 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 12 rows
DeterminandMaterialResults First – lastLatest result
Oxygen, Dissolved, % Saturation 9901 River water 3 Jul 2026 – Sep 2026 100.1% 10 Sep 2026
Oxygen, Dissolved as O2 9924 River water 3 Jul 2026 – Sep 2026 10.2 mg/l 10 Sep 2026
Temperature of Water 0076 River water 3 Jul 2026 – Sep 2026 14.2 °C 10 Sep 2026
pH 0061 River water 3 Jul 2026 – Sep 2026 8.01 10 Sep 2026
Ammoniacal Nitrogen as N 0111 River water 3 Jul 2026 – Sep 2026 below 0.03 mg/l 10 Sep 2026
Nitrate as N 0117 River water 3 Jul 2026 – Sep 2026 3.9 mg/l 10 Sep 2026
Orthophosphate, reactive as P 0180 River water 3 Jul 2026 – Sep 2026 0.095 mg/l 10 Sep 2026
Conductivity at 25 C 0077 River water 3 Jul 2026 – Sep 2026 395 µS/cm 10 Sep 2026
Alkalinity to pH 4.5 as CaCO3 0162 River water 3 Jul 2026 – Sep 2026 72 mg/l 10 Sep 2026
Ammonia un-ionised as N 0119 River water 3 Jul 2026 – Sep 2026 below 0.00074 mg/l 10 Sep 2026
Nitrite as N 0118 River water 3 Jul 2026 – Sep 2026 0.0045 mg/l 10 Sep 2026
Nitrogen, Total Oxidised as N 0116 River water 3 Jul 2026 – Sep 2026 3.9 mg/l 10 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.