River Otter at Otterton
EA name: RIVER OTTER AT OTTERTON
Environment Agency sampling point SW-70420102 · 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
- 13 Jul 2026, 15:003 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 34 since 3 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (UK govt policy - not GQA or RE)
- Where
- National Grid 307896, 85282As 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, 18 m from the line.
- Next gauge downstream
- Budleigh South Farm Road White Bridge On the River Otter · 2.4 km along the river
- Nearest gauge upstream
- Dotton On the River Otter · 3.8 km along the riverDOTTON 3.8 km along the river
- Why it was sampled
- Monitoring (UK govt policy - not GQA or RE) (34 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
99.1%
Sampled 5 May 2026, 5 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:05 | 99.1 | 99.1% |
| 10 Apr 2026, 09:42 | 101 | 101% |
| 5 Mar 2026, 09:53 | 92.2 | 92.2% |
| 17 Feb 2026, 12:28 | 95.2 | 95.2% |
| 28 Jan 2026, 09:09 | 98.8 | 98.8% |
| 4 Dec 2025, 12:10 | 98.3 | 98.3% |
| 20 Nov 2025, 11:37 | 95.2 | 95.2% |
| 30 Oct 2025, 10:17 | 95.5 | 95.5% |
| 5 Sep 2025, 11:18 | 94.1 | 94.1% |
| 12 Aug 2025, 10:19 | 91.9 | 91.9% |
| 18 Jul 2025, 12:24 | 101.4 | 101.4% |
| 25 Jun 2025, 09:45 | 94.2 | 94.2% |
| 28 May 2025, 15:25 | 100.4 | 100.4% |
| 22 Apr 2025, 10:39 | 99.4 | 99.4% |
| 25 Mar 2025, 11:50 | 122.3 | 122.3% |
| 20 Feb 2025, 11:23 | 99.8 | 99.8% |
| 4 Feb 2025, 14:58 | 98.8 | 98.8% |
| 20 Jan 2025, 12:14 | 96.9 | 96.9% |
| 9 Dec 2024, 09:30 | 97.3 | 97.3% |
| 25 Nov 2024, 09:54 | 97.8 | 97.8% |
| 29 Oct 2024, 15:20 | 100.2 | 100.2% |
| 16 Sep 2024, 10:54 | 97.9 | 97.9% |
| 22 Aug 2024, 10:39 | 99.2 | 99.2% |
| 21 Jun 2024, 11:27 | 100.9 | 100.9% |
| 22 Mar 2024, 11:17 | 99 | 99% |
| 19 Feb 2024, 11:06 | 97 | 97% |
| 11 Jan 2024, 14:48 | 96.2 | 96.2% |
| 5 Dec 2023, 10:05 | 98.5 | 98.5% |
| 15 Nov 2023, 10:24 | 95 | 95% |
| 3 Oct 2023, 12:46 | 99.4 | 99.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.1 mg/l
Sampled 5 May 2026, 5 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:05 | 10.1 | 10.1 mg/l |
| 10 Apr 2026, 09:42 | 11.2 | 11.2 mg/l |
| 5 Mar 2026, 09:53 | 10.6 | 10.6 mg/l |
| 17 Feb 2026, 12:28 | 11.5 | 11.5 mg/l |
| 28 Jan 2026, 09:09 | 12 | 12 mg/l |
| 4 Dec 2025, 12:10 | 11.6 | 11.6 mg/l |
| 20 Nov 2025, 11:37 | 11.9 | 11.9 mg/l |
| 30 Oct 2025, 10:17 | 10.8 | 10.8 mg/l |
| 5 Sep 2025, 11:18 | 9.57 | 9.57 mg/l |
| 12 Aug 2025, 10:19 | 8.84 | 8.84 mg/l |
| 18 Jul 2025, 12:24 | 9.54 | 9.54 mg/l |
| 25 Jun 2025, 09:45 | 8.95 | 8.95 mg/l |
| 28 May 2025, 15:25 | 9.82 | 9.82 mg/l |
| 22 Apr 2025, 10:39 | 11 | 11 mg/l |
| 25 Mar 2025, 11:50 | 13.3 | 13.3 mg/l |
| 20 Feb 2025, 11:23 | 11.5 | 11.5 mg/l |
| 4 Feb 2025, 14:58 | 11.5 | 11.5 mg/l |
| 20 Jan 2025, 12:14 | 11.8 | 11.8 mg/l |
| 9 Dec 2024, 09:30 | 11.7 | 11.7 mg/l |
| 25 Nov 2024, 09:54 | 11.1 | 11.1 mg/l |
| 29 Oct 2024, 15:20 | 10.4 | 10.4 mg/l |
| 16 Sep 2024, 10:54 | 10.1 | 10.1 mg/l |
| 22 Aug 2024, 10:39 | 9.81 | 9.81 mg/l |
| 21 Jun 2024, 11:27 | 9.85 | 9.85 mg/l |
| 22 Mar 2024, 11:17 | 11 | 11 mg/l |
| 19 Feb 2024, 11:06 | 11 | 11 mg/l |
| 11 Jan 2024, 14:48 | 12.4 | 12.4 mg/l |
| 5 Dec 2023, 10:05 | 11.9 | 11.9 mg/l |
| 15 Nov 2023, 10:24 | 10.7 | 10.7 mg/l |
| 3 Oct 2023, 12:46 | 10 | 10 mg/l |
Water temperature
code 0076 · °C
14.3 °C
Sampled 5 May 2026, 5 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:05 | 14.3 | 14.3 °C |
| 10 Apr 2026, 09:42 | 10.8 | 10.8 °C |
| 5 Mar 2026, 09:53 | 9 | 9 °C |
| 17 Feb 2026, 12:28 | 7 | 7 °C |
| 28 Jan 2026, 09:09 | 6.8 | 6.8 °C |
| 4 Dec 2025, 12:10 | 8 | 8 °C |
| 20 Nov 2025, 11:37 | 5.9 | 5.9 °C |
| 30 Oct 2025, 10:17 | 9.8 | 9.8 °C |
| 5 Sep 2025, 11:18 | 14.5 | 14.5 °C |
| 12 Aug 2025, 10:19 | 17.1 | 17.1 °C |
| 18 Jul 2025, 12:24 | 18.2 | 18.2 °C |
| 25 Jun 2025, 09:45 | 17.7 | 17.7 °C |
| 28 May 2025, 15:25 | 16.3 | 16.3 °C |
| 22 Apr 2025, 10:39 | 10.7 | 10.7 °C |
| 25 Mar 2025, 11:50 | 11.4 | 11.4 °C |
| 20 Feb 2025, 11:23 | 9 | 9 °C |
| 4 Feb 2025, 14:58 | 8.7 | 8.7 °C |
| 20 Jan 2025, 12:14 | 6.8 | 6.8 °C |
| 9 Dec 2024, 09:30 | 7.2 | 7.2 °C |
| 25 Nov 2024, 09:54 | 9.8 | 9.8 °C |
| 29 Oct 2024, 15:20 | 13.5 | 13.5 °C |
| 16 Sep 2024, 10:54 | 13.9 | 13.9 °C |
| 22 Aug 2024, 10:39 | 15.8 | 15.8 °C |
| 21 Jun 2024, 11:27 | 16.4 | 16.4 °C |
| 22 Mar 2024, 11:17 | 10.6 | 10.6 °C |
| 19 Feb 2024, 11:06 | 9.9 | 9.9 °C |
| 11 Jan 2024, 14:48 | 4.5 | 4.5 °C |
| 5 Dec 2023, 10:05 | 7.3 | 7.3 °C |
| 15 Nov 2023, 10:24 | 10.2 | 10.2 °C |
| 3 Oct 2023, 12:46 | 15 | 15 °C |
pH
code 0061
7.93
Sampled 5 May 2026, 5 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:05 | 7.93 | 7.93 |
| 10 Apr 2026, 09:42 | 8.2 | 8.2 |
| 5 Mar 2026, 09:53 | 7.89 | 7.89 |
| 17 Feb 2026, 12:28 | 7.9 | 7.9 |
| 28 Jan 2026, 09:09 | 7.64 | 7.64 |
| 4 Dec 2025, 12:10 | 7.89 | 7.89 |
| 20 Nov 2025, 11:37 | 7.88 | 7.88 |
| 30 Oct 2025, 10:17 | 7.98 | 7.98 |
| 5 Sep 2025, 11:18 | 7.69 | 7.69 |
| 12 Aug 2025, 10:19 | 7.86 | 7.86 |
| 18 Jul 2025, 12:24 | 8.1 | 8.1 |
| 25 Jun 2025, 09:45 | 7.87 | 7.87 |
| 28 May 2025, 15:25 | 8.19 | 8.19 |
| 22 Apr 2025, 10:39 | 7.86 | 7.86 |
| 25 Mar 2025, 11:50 | 8.64 | 8.64 |
| 20 Feb 2025, 11:23 | 7.92 | 7.92 |
| 4 Feb 2025, 14:58 | 7.88 | 7.88 |
| 20 Jan 2025, 12:14 | 7.89 | 7.89 |
| 9 Dec 2024, 09:30 | 7.93 | 7.93 |
| 25 Nov 2024, 09:54 | 7.62 | 7.62 |
| 29 Oct 2024, 15:20 | 7.87 | 7.87 |
| 16 Sep 2024, 10:54 | 7.85 | 7.85 |
| 22 Aug 2024, 10:39 | 7.96 | 7.96 |
| 21 Jun 2024, 11:27 | 7.98 | 7.98 |
| 22 Mar 2024, 11:17 | 7.96 | 7.96 |
| 19 Feb 2024, 11:06 | 7.77 | 7.77 |
| 11 Jan 2024, 14:48 | 7.93 | 7.93 |
| 5 Dec 2023, 10:05 | 7.52 | 7.52 |
| 15 Nov 2023, 10:24 | 7.78 | 7.78 |
| 3 Oct 2023, 12:46 | 8.09 | 8.09 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 13 Jul 2026, 3 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Jul 2026, 15:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Jun 2026, 12:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 May 2026, 12:05 | 0.04 | 0.04 mg/l |
| 10 Apr 2026, 09:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2026, 09:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Feb 2026, 12:28 | 0.077 | 0.077 mg/l |
| 28 Jan 2026, 09:09 | 0.086 | 0.086 mg/l |
| 4 Dec 2025, 12:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Nov 2025, 11:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Oct 2025, 10:17 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Sep 2025, 11:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Aug 2025, 10:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jul 2025, 12:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Jun 2025, 09:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 May 2025, 15:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Apr 2025, 10:39 | 0.045 | 0.045 mg/l |
| 25 Mar 2025, 11:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Feb 2025, 11:23 | 0.098 | 0.098 mg/l |
| 4 Feb 2025, 14:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jan 2025, 12:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Dec 2024, 09:30 | 0.14 | 0.14 mg/l |
| 25 Nov 2024, 09:54 | 0.062 | 0.062 mg/l |
| 29 Oct 2024, 15:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Sep 2024, 10:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Aug 2024, 10:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Jun 2024, 11:27 | 0.03 | 0.03 mg/l |
| 22 Mar 2024, 11:17 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Feb 2024, 11:06 | 0.043 | 0.043 mg/l |
| 11 Jan 2024, 14:48 | 0.059 | 0.059 mg/l |
| 5 Dec 2023, 10:05 | 0.059 | 0.059 mg/l |
| 15 Nov 2023, 10:24 | 0.047 | 0.047 mg/l |
| 3 Oct 2023, 12:46 | 0.045 | 0.045 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
4.87 mg/l
Sampled 13 Jul 2026, 3 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Jul 2026, 15:00 | 4.87 | 4.87 mg/l |
| 12 Jun 2026, 12:04 | 4.68 | 4.68 mg/l |
| 5 May 2026, 12:05 | 4.57 | 4.57 mg/l |
| 10 Apr 2026, 09:42 | 4.38 | 4.38 mg/l |
| 5 Mar 2026, 09:53 | 3.87 | 3.87 mg/l |
| 17 Feb 2026, 12:28 | 3.17 | 3.17 mg/l |
| 28 Jan 2026, 09:09 | 2.69 | 2.69 mg/l |
| 4 Dec 2025, 12:10 | 4.28 | 4.28 mg/l |
| 20 Nov 2025, 11:37 | 4.89 | 4.89 mg/l |
| 30 Oct 2025, 10:17 | 4.79 | 4.79 mg/l |
| 5 Sep 2025, 11:18 | 3.88 | 3.88 mg/l |
| 12 Aug 2025, 10:19 | 5.48 | 5.48 mg/l |
| 18 Jul 2025, 12:24 | 5.28 | 5.28 mg/l |
| 25 Jun 2025, 09:45 | 5.58 | 5.58 mg/l |
| 28 May 2025, 15:25 | 4.98 | 4.98 mg/l |
| 22 Apr 2025, 10:39 | 4.08 | 4.08 mg/l |
| 25 Mar 2025, 11:50 | 4.49 | 4.49 mg/l |
| 20 Feb 2025, 11:23 | 2.97 | 2.97 mg/l |
| 4 Feb 2025, 14:58 | 4.68 | 4.68 mg/l |
| 20 Jan 2025, 12:14 | 4.99 | 4.99 mg/l |
| 9 Dec 2024, 09:30 | 4.06 | 4.06 mg/l |
| 25 Nov 2024, 09:54 | 2.69 | 2.69 mg/l |
| 29 Oct 2024, 15:20 | 3.78 | 3.78 mg/l |
| 16 Sep 2024, 10:54 | 5.29 | 5.29 mg/l |
| 22 Aug 2024, 10:39 | 5.39 | 5.39 mg/l |
| 21 Jun 2024, 11:27 | 5.17 | 5.17 mg/l |
| 22 Mar 2024, 11:17 | 4.37 | 4.37 mg/l |
| 19 Feb 2024, 11:06 | 2.88 | 2.88 mg/l |
| 11 Jan 2024, 14:48 | 4.65 | 4.65 mg/l |
| 5 Dec 2023, 10:05 | 2.89 | 2.89 mg/l |
| 15 Nov 2023, 10:24 | 3.27 | 3.27 mg/l |
| 3 Oct 2023, 12:46 | 4.15 | 4.15 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.078 mg/l
Sampled 13 Jul 2026, 3 months ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Jul 2026, 15:00 | 0.078 | 0.078 mg/l |
| 12 Jun 2026, 12:04 | 0.097 | 0.097 mg/l |
| 5 May 2026, 12:05 | 0.089 | 0.089 mg/l |
| 10 Apr 2026, 09:42 | 0.015 | 0.015 mg/l |
| 5 Mar 2026, 09:53 | 0.092 | 0.092 mg/l |
| 17 Feb 2026, 12:28 | 0.11 | 0.11 mg/l |
| 28 Jan 2026, 09:09 | 0.11 | 0.11 mg/l |
| 4 Dec 2025, 12:10 | 0.11 | 0.11 mg/l |
| 20 Nov 2025, 11:37 | 0.1 | 0.1 mg/l |
| 30 Oct 2025, 10:17 | 0.099 | 0.099 mg/l |
| 5 Sep 2025, 11:18 | 0.13 | 0.13 mg/l |
| 12 Aug 2025, 10:19 | 0.099 | 0.099 mg/l |
| 18 Jul 2025, 12:24 | 0.11 | 0.11 mg/l |
| 25 Jun 2025, 09:45 | 0.1 | 0.1 mg/l |
| 28 May 2025, 15:25 | 0.092 | 0.092 mg/l |
| 22 Apr 2025, 10:39 | 0.091 | 0.091 mg/l |
| 25 Mar 2025, 11:50 | 0.042 | 0.042 mg/l |
| 20 Feb 2025, 11:23 | 0.098 | 0.098 mg/l |
| 4 Feb 2025, 14:58 | 0.089 | 0.089 mg/l |
| 20 Jan 2025, 12:14 | 0.11 | 0.11 mg/l |
| 9 Dec 2024, 09:30 | 0.11 | 0.11 mg/l |
| 25 Nov 2024, 09:54 | 0.21 | 0.21 mg/l |
| 29 Oct 2024, 15:20 | 0.11 | 0.11 mg/l |
| 16 Sep 2024, 10:54 | 0.098 | 0.098 mg/l |
| 22 Aug 2024, 10:39 | 0.094 | 0.094 mg/l |
| 21 Jun 2024, 11:27 | 0.11 | 0.11 mg/l |
| 22 Mar 2024, 11:17 | 0.096 | 0.096 mg/l |
| 19 Feb 2024, 11:06 | 0.13 | 0.13 mg/l |
| 11 Jan 2024, 14:48 | 0.086 | 0.086 mg/l |
| 5 Dec 2023, 10:05 | 0.13 | 0.13 mg/l |
| 15 Nov 2023, 10:24 | 0.12 | 0.12 mg/l |
| 3 Oct 2023, 12:46 | 0.13 | 0.13 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
387 µS/cm
Sampled 5 May 2026, 5 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:05 | 387 | 387 µS/cm |
| 10 Apr 2026, 09:42 | 391 | 391 µS/cm |
| 5 Mar 2026, 09:53 | 333 | 333 µS/cm |
| 17 Feb 2026, 12:28 | 291 | 291 µS/cm |
| 28 Jan 2026, 09:09 | 235 | 235 µS/cm |
| 4 Dec 2025, 12:10 | 335 | 335 µS/cm |
| 20 Nov 2025, 11:37 | 388 | 388 µS/cm |
| 30 Oct 2025, 10:17 | 418 | 418 µS/cm |
| 5 Sep 2025, 11:18 | 374 | 374 µS/cm |
| 12 Aug 2025, 10:19 | 439 | 439 µS/cm |
| 18 Jul 2025, 12:24 | 436 | 436 µS/cm |
| 25 Jun 2025, 09:45 | 438 | 438 µS/cm |
| 28 May 2025, 15:25 | 410 | 410 µS/cm |
| 22 Apr 2025, 10:39 | 357 | 357 µS/cm |
| 25 Mar 2025, 11:50 | 381 | 381 µS/cm |
| 20 Feb 2025, 11:23 | 302 | 302 µS/cm |
| 4 Feb 2025, 14:58 | 371 | 371 µS/cm |
| 20 Jan 2025, 12:14 | 387 | 387 µS/cm |
| 9 Dec 2024, 09:30 | 353 | 353 µS/cm |
| 25 Nov 2024, 09:54 | 227 | 227 µS/cm |
| 29 Oct 2024, 15:20 | 350 | 350 µS/cm |
| 16 Sep 2024, 10:54 | 421 | 421 µS/cm |
| 22 Aug 2024, 10:39 | 419 | 419 µS/cm |
| 21 Jun 2024, 11:27 | 407 | 407 µS/cm |
| 22 Mar 2024, 11:17 | 350 | 350 µS/cm |
| 19 Feb 2024, 11:06 | 266 | 266 µS/cm |
| 11 Jan 2024, 14:48 | 360 | 360 µS/cm |
| 5 Dec 2023, 10:05 | 246 | 246 µS/cm |
| 15 Nov 2023, 10:24 | 304 | 304 µS/cm |
| 3 Oct 2023, 12:46 | 393 | 393 µS/cm |
Everything measured here
80 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 80 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 30 | Oct 2023 – May 2026 | 99.1% 5 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 30 | Oct 2023 – May 2026 | 10.1 mg/l 5 May 2026 |
| Temperature of Water 0076 | River water | 30 | Oct 2023 – May 2026 | 14.3 °C 5 May 2026 |
| pH 0061 | River water | 30 | Oct 2023 – May 2026 | 7.93 5 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 32 | Oct 2023 – Jul 2026 | below 0.03 mg/l 13 Jul 2026 |
| Nitrate as N 0117 | River water | 32 | Oct 2023 – Jul 2026 | 4.87 mg/l 13 Jul 2026 |
| Orthophosphate, reactive as P 0180 | River water | 32 | Oct 2023 – Jul 2026 | 0.078 mg/l 13 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 30 | Oct 2023 – May 2026 | 387 µS/cm 5 May 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 13 | Oct 2023 – Feb 2025 | below 0.001 µg/l 20 Feb 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 13 | Oct 2023 – Feb 2025 | below 0.001 µg/l 20 Feb 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 13 | Oct 2023 – Feb 2025 | below 0.001 µg/l 20 Feb 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 13 | Oct 2023 – Feb 2025 | below 0.002 µg/l 20 Feb 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 13 | Oct 2023 – Feb 2025 | below 0.001 µg/l 20 Feb 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 13 | Oct 2023 – Feb 2025 | below 0.004 µg/l 20 Feb 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 13 | Oct 2023 – Feb 2025 | below 0.005 µg/l 20 Feb 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 13 | Oct 2023 – Feb 2025 | 0.013 µg/l 20 Feb 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 13 | Oct 2023 – Feb 2025 | below 0.001 µg/l 20 Feb 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 30 | Oct 2023 – May 2026 | 110 mg/l 5 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 30 | Oct 2023 – May 2026 | 0.00085 mg/l 5 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – May 2026 | 1.4 mg/l 5 May 2026 |
| Cadmium 0108 | River water | 33 | Oct 2023 – Jun 2026 | 0.013 µg/l 12 Jun 2026 |
| Copper 6452 | River water | 33 | Oct 2023 – Jun 2026 | 1.3 µg/l 12 Jun 2026 |
| GCMS Screen : Target Based multi-residue screening : Semi Quantitative 4994 | River water | 4 | Apr 2026 – Jul 2026 | 1 text result 13 Jul 2026 |
| HCH -gamma :- {Lindane} 0499 | River water | 31 | Oct 2023 – Jul 2026 | below 0.003 µg/l 13 Jul 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 13 | Oct 2023 – Feb 2025 | below 0.001 µg/l 20 Feb 2025 |
| LCMS Screen : Semi Quantitative 7299 | River water | 1 | May 2026 – May 2026 | 1 text result 5 May 2026 |
| Lead 0050 | River water | 33 | Oct 2023 – Jun 2026 | 0.38 µg/l 12 Jun 2026 |
| Mercury 0105 | River water | 34 | Oct 2023 – Jul 2026 | below 0.01 µg/l 13 Jul 2026 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 13 | Oct 2023 – Feb 2025 | below 0.002 µg/l 20 Feb 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 13 | Oct 2023 – Feb 2025 | below 0.002 µg/l 20 Feb 2025 |
| Nickel 6462 | River water | 29 | Feb 2024 – Jun 2026 | 1.4 µg/l 12 Jun 2026 |
| Nitrite as N 0118 | River water | 32 | Oct 2023 – Jul 2026 | 0.03 mg/l 13 Jul 2026 |
| Nitrogen, Total as N 9686 | River water | 27 | Oct 2023 – Jul 2026 | 5.3 mg/l 13 Jul 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 32 | Oct 2023 – Jul 2026 | 4.9 mg/l 13 Jul 2026 |
| PCB - 028 9768 | River water | 31 | Oct 2023 – Jun 2026 | below 0.001 µg/l 12 Jun 2026 |
| PCB - 052 9769 | River water | 31 | Oct 2023 – Jul 2026 | below 0.001 µg/l 13 Jul 2026 |
| PCB - 101 9770 | River water | 32 | Oct 2023 – Jul 2026 | below 0.001 µg/l 13 Jul 2026 |
| PCB - 118 9771 | River water | 33 | Oct 2023 – Jul 2026 | below 0.001 µg/l 13 Jul 2026 |
| PCB - 138 9772 | River water | 33 | Oct 2023 – Jul 2026 | below 0.001 µg/l 13 Jul 2026 |
| PCB - 153 9773 | River water | 33 | Oct 2023 – Jul 2026 | below 0.001 µg/l 13 Jul 2026 |
| PCB - 180 9774 | River water | 33 | Oct 2023 – Jul 2026 | below 0.002 µg/l 13 Jul 2026 |
| PCB : Total 0753 | River water | 30 | Oct 2023 – Jun 2026 | below 0.008 µg/l 12 Jun 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 12 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 11 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 13 | Oct 2023 – Feb 2025 | below 0.001 µg/l 20 Feb 2025 |
| Perfluorobutanoic acid 2995 | River water | 12 | Oct 2023 – Feb 2025 | 0.0015 µg/l 20 Feb 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 13 | Oct 2023 – Feb 2025 | below 0.002 µg/l 20 Feb 2025 |
| Perfluorodecanoic acid 8892 | River water | 13 | Oct 2023 – Feb 2025 | below 0.002 µg/l 20 Feb 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 12 | Oct 2023 – Feb 2025 | below 0.005 µg/l 20 Feb 2025 |
| Perfluorododecanoic acid 8894 | River water | 13 | Oct 2023 – Feb 2025 | below 0.002 µg/l 20 Feb 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluoroheptanoic acid 8889 | River water | 13 | Oct 2023 – Feb 2025 | below 0.001 µg/l 20 Feb 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluorohexanoic acid 8888 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluorononanoic acid 8891 | River water | 12 | Oct 2023 – Feb 2025 | below 0.001 µg/l 20 Feb 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 13 | Oct 2023 – Feb 2025 | below 0.002 µg/l 20 Feb 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 13 | Oct 2023 – Feb 2025 | below 0.001 µg/l 20 Feb 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 12 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluorooctanoic acid 8890 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 13 | Oct 2023 – Feb 2025 | below 0.0005 µg/l 20 Feb 2025 |
| Perfluoropentanoic acid 8887 | River water | 13 | Oct 2023 – Feb 2025 | below 0.001 µg/l 20 Feb 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 13 | Oct 2023 – Feb 2025 | below 0.006 µg/l 20 Feb 2025 |
| Perfluorotridecanoic acid 2955 | River water | 13 | Oct 2023 – Feb 2025 | below 0.005 µg/l 20 Feb 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 13 | Oct 2023 – Feb 2025 | below 0.004 µg/l 20 Feb 2025 |
| Perfluoroundecanoic acid 8893 | River water | 13 | Oct 2023 – Feb 2025 | below 0.002 µg/l 20 Feb 2025 |
| Phosphorus, Total as P 0348 | River water | 27 | Oct 2023 – Jul 2026 | 0.1 mg/l 13 Jul 2026 |
| Solids, Suspended at 105 C 0135 | River water | 29 | Oct 2023 – Jul 2026 | 4.5 mg/l 13 Jul 2026 |
| Zinc 6455 | River water | 33 | Oct 2023 – Jun 2026 | 2.1 µg/l 12 Jun 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.