Derwent upstream of Rye confluence
EA name: DERWENT U/S RYE CONFLUENCE
Environment Agency sampling point NE-49603068 · 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
- 4 Sep 2026, 13:1827 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 45 since 11 Apr 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 482139, 475892As published, to the nearest 1 m. Open in a map
- River, by its own name
- Derwent
- River, by the map
- River DerwentPlaced on the river its name gives, 7 m from the line.
- Next gauge downstream
- Malton, A64 Road Bridge On the River Derwent · 4.3 km along the river
- Nearest gauge upstream
- Low Marishes On the River Derwent · 2.5 km along the river
- Why it was sampled
- Monitoring (national agency policy) (23 samples)
Environmental monitoring statutory (EU directives) (22 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
90.6%
Sampled 4 Sep 2026, 27 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:18 | 90.6 | 90.6% |
| 13 Aug 2026, 13:53 | 106.6 | 106.6% |
| 15 Jul 2026, 11:19 | 94.5 | 94.5% |
| 24 Jun 2026, 12:07 | 90.6 | 90.6% |
| 4 Jun 2026, 13:36 | 91.2 | 91.2% |
| 29 May 2026, 09:52 | 86.6 | 86.6% |
| 7 May 2026, 14:00 | 97.7 | 97.7% |
| 7 Apr 2026, 13:49 | 98.7 | 98.7% |
| 26 Mar 2026, 13:00 | 92.3 | 92.3% |
| 9 Mar 2026, 13:20 | 90.8 | 90.8% |
| 25 Feb 2026, 10:36 | 90.4 | 90.4% |
| 28 Jan 2026, 11:48 | 80.3 | 80.3% |
| 20 Mar 2025, 12:03 | 95.4 | 95.4% |
| 5 Mar 2025, 12:17 | 96.2 | 96.2% |
| 17 Feb 2025, 14:42 | 92.8 | 92.8% |
| 3 Feb 2025, 11:27 | 90.7 | 90.7% |
| 27 Jan 2025, 11:24 | 88.1 | 88.1% |
| 14 Jan 2025, 10:18 | 92.7 | 92.7% |
| 17 Dec 2024, 13:32 | 88.4 | 88.4% |
| 4 Dec 2024, 10:50 | 88.2 | 88.2% |
| 26 Nov 2024, 11:55 | 79.8 | 79.8% |
| 7 Nov 2024, 12:54 | 91.2 | 91.2% |
| 21 Oct 2024, 12:43 | 86.1 | 86.1% |
| 4 Oct 2024, 10:01 | 77.1 | 77.1% |
| 30 Sep 2024, 13:38 | 77.8 | 77.8% |
| 13 Sep 2024, 11:07 | 92.7 | 92.7% |
| 30 Aug 2024, 11:27 | 91 | 91% |
| 12 Aug 2024, 13:45 | 91.7 | 91.7% |
| 18 Jul 2024, 15:48 | 88.8 | 88.8% |
| 2 Jul 2024, 14:37 | 94 | 94% |
| 27 Jun 2024, 12:14 | 88.6 | 88.6% |
| 12 Jun 2024, 14:40 | 94.6 | 94.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.86 mg/l
Sampled 4 Sep 2026, 27 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:18 | 8.86 | 8.86 mg/l |
| 13 Aug 2026, 13:53 | 9.57 | 9.57 mg/l |
| 15 Jul 2026, 11:19 | 8.9 | 8.9 mg/l |
| 24 Jun 2026, 12:07 | 8.01 | 8.01 mg/l |
| 4 Jun 2026, 13:36 | 9.35 | 9.35 mg/l |
| 29 May 2026, 09:52 | 8.58 | 8.58 mg/l |
| 7 May 2026, 14:00 | 10.9 | 10.9 mg/l |
| 7 Apr 2026, 13:49 | 11 | 11 mg/l |
| 26 Mar 2026, 13:00 | 11 | 11 mg/l |
| 9 Mar 2026, 13:20 | 10.5 | 10.5 mg/l |
| 25 Feb 2026, 10:36 | 10.4 | 10.4 mg/l |
| 28 Jan 2026, 11:48 | 10.5 | 10.5 mg/l |
| 20 Mar 2025, 12:03 | 11.4 | 11.4 mg/l |
| 5 Mar 2025, 12:17 | 11.5 | 11.5 mg/l |
| 17 Feb 2025, 14:42 | 11.5 | 11.5 mg/l |
| 3 Feb 2025, 11:27 | 11.4 | 11.4 mg/l |
| 27 Jan 2025, 11:24 | 11.2 | 11.2 mg/l |
| 14 Jan 2025, 10:18 | 11.5 | 11.5 mg/l |
| 17 Dec 2024, 13:32 | 10.3 | 10.3 mg/l |
| 4 Dec 2024, 10:50 | 11 | 11 mg/l |
| 26 Nov 2024, 11:55 | 9.65 | 9.65 mg/l |
| 7 Nov 2024, 12:54 | 10.1 | 10.1 mg/l |
| 21 Oct 2024, 12:43 | 9.43 | 9.43 mg/l |
| 4 Oct 2024, 10:01 | 8.67 | 8.67 mg/l |
| 30 Sep 2024, 13:38 | 8.48 | 8.48 mg/l |
| 13 Sep 2024, 11:07 | 10.4 | 10.4 mg/l |
| 30 Aug 2024, 11:27 | 9.25 | 9.25 mg/l |
| 12 Aug 2024, 13:45 | 8.95 | 8.95 mg/l |
| 18 Jul 2024, 15:48 | 8.58 | 8.58 mg/l |
| 2 Jul 2024, 14:37 | 9.54 | 9.54 mg/l |
| 27 Jun 2024, 12:14 | 8.43 | 8.43 mg/l |
| 12 Jun 2024, 14:40 | 9.99 | 9.99 mg/l |
Water temperature
code 0076 · °C
16.3 °C
Sampled 4 Sep 2026, 27 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:18 | 16.3 | 16.3 °C |
| 13 Aug 2026, 13:53 | 20.5 | 20.5 °C |
| 15 Jul 2026, 11:19 | 18.1 | 18.1 °C |
| 24 Jun 2026, 12:07 | 21.3 | 21.3 °C |
| 4 Jun 2026, 13:36 | 14.1 | 14.1 °C |
| 29 May 2026, 09:52 | 15.7 | 15.7 °C |
| 7 May 2026, 14:00 | 10.6 | 10.6 °C |
| 7 Apr 2026, 13:49 | 10.5 | 10.5 °C |
| 26 Mar 2026, 13:00 | 7.8 | 7.8 °C |
| 9 Mar 2026, 13:20 | 8.8 | 8.8 °C |
| 25 Feb 2026, 10:36 | 9.3 | 9.3 °C |
| 28 Jan 2026, 11:48 | 4.1 | 4.1 °C |
| 20 Mar 2025, 12:03 | 7.7 | 7.7 °C |
| 5 Mar 2025, 12:17 | 7.4 | 7.4 °C |
| 17 Feb 2025, 14:42 | 6.1 | 6.1 °C |
| 3 Feb 2025, 11:27 | 5.6 | 5.6 °C |
| 27 Jan 2025, 11:24 | 5.3 | 5.3 °C |
| 14 Jan 2025, 10:18 | 6 | 6 °C |
| 17 Dec 2024, 13:32 | 8.5 | 8.5 °C |
| 4 Dec 2024, 10:50 | 6 | 6 °C |
| 26 Nov 2024, 11:55 | 7.1 | 7.1 °C |
| 7 Nov 2024, 12:54 | 10.6 | 10.6 °C |
| 21 Oct 2024, 12:43 | 11.2 | 11.2 °C |
| 4 Oct 2024, 10:01 | 10.1 | 10.1 °C |
| 30 Sep 2024, 13:38 | 11.4 | 11.4 °C |
| 13 Sep 2024, 11:07 | 10.1 | 10.1 °C |
| 30 Aug 2024, 11:27 | 14.5 | 14.5 °C |
| 12 Aug 2024, 13:45 | 16.4 | 16.4 °C |
| 18 Jul 2024, 15:48 | 16.9 | 16.9 °C |
| 2 Jul 2024, 14:37 | 14.6 | 14.6 °C |
| 27 Jun 2024, 12:14 | 17.6 | 17.6 °C |
| 12 Jun 2024, 14:40 | 12.8 | 12.8 °C |
pH
code 0061
7.84
Sampled 4 Sep 2026, 27 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:18 | 7.84 | 7.84 |
| 13 Aug 2026, 13:53 | 7.99 | 7.99 |
| 15 Jul 2026, 11:19 | 8.14 | 8.14 |
| 24 Jun 2026, 12:07 | 8.03 | 8.03 |
| 4 Jun 2026, 13:36 | 8.11 | 8.11 |
| 29 May 2026, 09:52 | 8.33 | 8.33 |
| 7 May 2026, 14:00 | 8.06 | 8.06 |
| 7 Apr 2026, 13:49 | 7.95 | 7.95 |
| 26 Mar 2026, 13:00 | 7.98 | 7.98 |
| 9 Mar 2026, 13:20 | 7.87 | 7.87 |
| 25 Feb 2026, 10:36 | 7.79 | 7.79 |
| 28 Jan 2026, 11:48 | 7.74 | 7.74 |
| 20 Mar 2025, 12:03 | 8 | 8 |
| 5 Mar 2025, 12:17 | 8.02 | 8.02 |
| 17 Feb 2025, 14:42 | 7.95 | 7.95 |
| 3 Feb 2025, 11:27 | 7.81 | 7.81 |
| 27 Jan 2025, 11:24 | 7.77 | 7.77 |
| 14 Jan 2025, 10:18 | 7.82 | 7.82 |
| 17 Dec 2024, 13:32 | 7.9 | 7.9 |
| 4 Dec 2024, 10:50 | 7.85 | 7.85 |
| 26 Nov 2024, 11:55 | 7.65 | 7.65 |
| 7 Nov 2024, 12:54 | 7.86 | 7.86 |
| 21 Oct 2024, 12:43 | 7.67 | 7.67 |
| 4 Oct 2024, 10:01 | 7.66 | 7.66 |
| 30 Sep 2024, 13:38 | 7.64 | 7.64 |
| 13 Sep 2024, 11:07 | 7.97 | 7.97 |
| 30 Aug 2024, 11:27 | 7.91 | 7.91 |
| 12 Aug 2024, 13:45 | 7.96 | 7.96 |
| 18 Jul 2024, 15:48 | 7.73 | 7.73 |
| 2 Jul 2024, 14:37 | 8.03 | 8.03 |
| 27 Jun 2024, 12:14 | 7.95 | 7.95 |
| 12 Jun 2024, 14:40 | 8.03 | 8.03 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 4 Sep 2026, 27 days ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Aug 2026, 13:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jul 2026, 11:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jun 2026, 12:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Jun 2026, 13:36 | 0.054 | 0.054 mg/l |
| 29 May 2026, 09:52 | 0.039 | 0.039 mg/l |
| 7 May 2026, 14:00 | 0.055 | 0.055 mg/l |
| 26 Mar 2026, 13:00 | 0.081 | 0.081 mg/l |
| 9 Mar 2026, 13:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Feb 2026, 10:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Jan 2026, 11:48 | 0.19 | 0.19 mg/l |
| 20 Mar 2025, 12:03 | 0.078 | 0.078 mg/l |
| 5 Mar 2025, 12:17 | 0.067 | 0.067 mg/l |
| 17 Feb 2025, 14:42 | 0.11 | 0.11 mg/l |
| 3 Feb 2025, 11:27 | 0.12 | 0.12 mg/l |
| 27 Jan 2025, 11:24 | 0.34 | 0.34 mg/l |
| 14 Jan 2025, 10:18 | 0.13 | 0.13 mg/l |
| 17 Dec 2024, 13:32 | 0.072 | 0.072 mg/l |
| 4 Dec 2024, 10:50 | 0.087 | 0.087 mg/l |
| 26 Nov 2024, 11:55 | 0.097 | 0.097 mg/l |
| 7 Nov 2024, 12:54 | 0.046 | 0.046 mg/l |
| 21 Oct 2024, 12:43 | 0.078 | 0.078 mg/l |
| 4 Oct 2024, 10:01 | 0.033 | 0.033 mg/l |
| 30 Sep 2024, 13:38 | 0.047 | 0.047 mg/l |
| 13 Sep 2024, 11:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Aug 2024, 11:27 | 0.044 | 0.044 mg/l |
| 12 Aug 2024, 13:45 | 0.058 | 0.058 mg/l |
| 18 Jul 2024, 15:48 | 0.055 | 0.055 mg/l |
| 2 Jul 2024, 14:37 | 0.045 | 0.045 mg/l |
| 27 Jun 2024, 12:14 | 0.057 | 0.057 mg/l |
| 12 Jun 2024, 14:40 | 0.041 | 0.041 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
6.27 mg/l
Sampled 4 Sep 2026, 27 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:18 | 6.27 | 6.27 mg/l |
| 13 Aug 2026, 13:53 | 7.67 | 7.67 mg/l |
| 15 Jul 2026, 11:19 | 7.88 | 7.88 mg/l |
| 24 Jun 2026, 12:07 | 7.07 | 7.07 mg/l |
| 4 Jun 2026, 13:36 | 7.17 | 7.17 mg/l |
| 29 May 2026, 09:52 | 7.06 | 7.06 mg/l |
| 7 May 2026, 14:00 | 7.47 | 7.47 mg/l |
| 26 Mar 2026, 13:00 | 7.06 | 7.06 mg/l |
| 9 Mar 2026, 13:20 | 0.266 | 0.266 mg/l |
| 25 Feb 2026, 10:36 | 6.77 | 6.77 mg/l |
| 28 Jan 2026, 11:48 | 6.67 | 6.67 mg/l |
| 20 Mar 2025, 12:03 | 7.46 | 7.46 mg/l |
| 5 Mar 2025, 12:17 | 7.17 | 7.17 mg/l |
| 17 Feb 2025, 14:42 | 6.86 | 6.86 mg/l |
| 3 Feb 2025, 11:27 | 6.66 | 6.66 mg/l |
| 27 Jan 2025, 11:24 | 6.76 | 6.76 mg/l |
| 14 Jan 2025, 10:18 | 6.56 | 6.56 mg/l |
| 17 Dec 2024, 13:32 | 6.05 | 6.05 mg/l |
| 26 Nov 2024, 11:55 | 6.15 | 6.15 mg/l |
| 7 Nov 2024, 12:54 | 5.83 | 5.83 mg/l |
| 21 Oct 2024, 12:43 | 5.04 | 5.04 mg/l |
| 4 Oct 2024, 10:01 | 5.35 | 5.35 mg/l |
| 30 Sep 2024, 13:38 | 5.44 | 5.44 mg/l |
| 13 Sep 2024, 11:07 | 6.79 | 6.79 mg/l |
| 30 Aug 2024, 11:27 | 6.56 | 6.56 mg/l |
| 12 Aug 2024, 13:45 | 6.36 | 6.36 mg/l |
| 18 Jul 2024, 15:48 | 4.95 | 4.95 mg/l |
| 2 Jul 2024, 14:37 | 6.96 | 6.96 mg/l |
| 27 Jun 2024, 12:14 | 6.76 | 6.76 mg/l |
| 12 Jun 2024, 14:40 | 6.37 | 6.37 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.058 mg/l
Sampled 4 Sep 2026, 27 days ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:18 | 0.058 | 0.058 mg/l |
| 15 Jul 2026, 11:19 | 0.053 | 0.053 mg/l |
| 24 Jun 2026, 12:07 | 0.047 | 0.047 mg/l |
| 4 Jun 2026, 13:36 | 0.04 | 0.04 mg/l |
| 29 May 2026, 09:52 | 0.029 | 0.029 mg/l |
| 7 May 2026, 14:00 | 0.039 | 0.039 mg/l |
| 26 Mar 2026, 13:00 | 0.03 | 0.03 mg/l |
| 9 Mar 2026, 13:20 | <0.01 | below 0.01 mg/l (not detected above this) |
| 25 Feb 2026, 10:36 | 0.024 | 0.024 mg/l |
| 28 Jan 2026, 11:48 | 0.061 | 0.061 mg/l |
| 20 Mar 2025, 12:03 | 0.025 | 0.025 mg/l |
| 5 Mar 2025, 12:17 | 0.024 | 0.024 mg/l |
| 17 Feb 2025, 14:42 | 0.028 | 0.028 mg/l |
| 3 Feb 2025, 11:27 | 0.021 | 0.021 mg/l |
| 27 Jan 2025, 11:24 | 0.052 | 0.052 mg/l |
| 14 Jan 2025, 10:18 | 0.023 | 0.023 mg/l |
| 17 Dec 2024, 13:32 | 0.035 | 0.035 mg/l |
| 4 Dec 2024, 10:50 | 0.038 | 0.038 mg/l |
| 26 Nov 2024, 11:55 | 0.035 | 0.035 mg/l |
| 7 Nov 2024, 12:54 | 0.028 | 0.028 mg/l |
| 21 Oct 2024, 12:43 | 0.035 | 0.035 mg/l |
| 4 Oct 2024, 10:01 | 0.043 | 0.043 mg/l |
| 30 Sep 2024, 13:38 | 0.058 | 0.058 mg/l |
| 13 Sep 2024, 11:07 | 0.036 | 0.036 mg/l |
| 30 Aug 2024, 11:27 | 0.05 | 0.05 mg/l |
| 12 Aug 2024, 13:45 | 0.04 | 0.04 mg/l |
| 18 Jul 2024, 15:48 | 0.036 | 0.036 mg/l |
| 2 Jul 2024, 14:37 | 0.035 | 0.035 mg/l |
| 27 Jun 2024, 12:14 | 0.043 | 0.043 mg/l |
| 12 Jun 2024, 14:40 | 0.034 | 0.034 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
685 µS/cm
Sampled 4 Sep 2026, 27 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:18 | 685 | 685 µS/cm |
| 13 Aug 2026, 13:53 | 669 | 669 µS/cm |
| 15 Jul 2026, 11:19 | 652 | 652 µS/cm |
| 24 Jun 2026, 12:07 | 673 | 673 µS/cm |
| 4 Jun 2026, 13:36 | 665 | 665 µS/cm |
| 29 May 2026, 09:52 | 690 | 690 µS/cm |
| 7 May 2026, 14:00 | 662 | 662 µS/cm |
| 7 Apr 2026, 13:49 | 671 | 671 µS/cm |
| 26 Mar 2026, 13:00 | 650 | 650 µS/cm |
| 9 Mar 2026, 13:20 | 683 | 683 µS/cm |
| 25 Feb 2026, 10:36 | 653 | 653 µS/cm |
| 28 Jan 2026, 11:48 | 653 | 653 µS/cm |
| 20 Mar 2025, 12:03 | 696 | 696 µS/cm |
| 5 Mar 2025, 12:17 | 724 | 724 µS/cm |
| 17 Feb 2025, 14:42 | 730 | 730 µS/cm |
| 3 Feb 2025, 11:27 | 730 | 730 µS/cm |
| 27 Jan 2025, 11:24 | 739 | 739 µS/cm |
| 14 Jan 2025, 10:18 | 723 | 723 µS/cm |
| 17 Dec 2024, 13:32 | 725 | 725 µS/cm |
| 4 Dec 2024, 10:50 | 651 | 651 µS/cm |
| 26 Nov 2024, 11:55 | 701 | 701 µS/cm |
| 7 Nov 2024, 12:54 | 698 | 698 µS/cm |
| 21 Oct 2024, 12:43 | 615 | 615 µS/cm |
| 4 Oct 2024, 10:01 | 589 | 589 µS/cm |
| 30 Sep 2024, 13:38 | 553 | 553 µS/cm |
| 13 Sep 2024, 11:07 | 659 | 659 µS/cm |
| 30 Aug 2024, 11:27 | 669 | 669 µS/cm |
| 12 Aug 2024, 13:45 | 649 | 649 µS/cm |
| 18 Jul 2024, 15:48 | 616 | 616 µS/cm |
| 2 Jul 2024, 14:37 | 645 | 645 µS/cm |
| 27 Jun 2024, 12:14 | 645 | 645 µS/cm |
| 12 Jun 2024, 14:40 | 626 | 626 µS/cm |
Everything measured here
62 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 62 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 32 | Jun 2024 – Sep 2026 | 90.6% 4 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 32 | Jun 2024 – Sep 2026 | 8.86 mg/l 4 Sep 2026 |
| Temperature of Water 0076 | River water | 32 | Jun 2024 – Sep 2026 | 16.3 °C 4 Sep 2026 |
| pH 0061 | River water | 32 | Jun 2024 – Sep 2026 | 7.84 4 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 31 | Jun 2024 – Sep 2026 | below 0.03 mg/l 4 Sep 2026 |
| Nitrate as N 0117 | River water | 30 | Jun 2024 – Sep 2026 | 6.27 mg/l 4 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 30 | Jun 2024 – Sep 2026 | 0.058 mg/l 4 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 32 | Jun 2024 – Sep 2026 | 685 µS/cm 4 Sep 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Aug 2025 – Aug 2025 | below 0.004 µg/l 1 Aug 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Aug 2025 – Aug 2025 | 0.0066 µg/l 1 Aug 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 31 | Jun 2024 – Sep 2026 | 200 mg/l 4 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 31 | Jun 2024 – Sep 2026 | below 0.0006 mg/l 4 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 24 | Jul 2024 – Sep 2026 | below 4 mg/l 4 Sep 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 2 | Aug 2026 – Sep 2026 | 3 mg/l 4 Sep 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Aug 2025 – Aug 2025 | below 0.002 µg/l 1 Aug 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Aug 2025 – Aug 2025 | below 0.002 µg/l 1 Aug 2025 |
| Nitrite as N 0118 | River water | 31 | Jun 2024 – Sep 2026 | 0.029 mg/l 4 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 30 | Jun 2024 – Sep 2026 | 6.3 mg/l 4 Sep 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| Perfluorobutanoic acid 2995 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| Perfluorodecanoic acid 8892 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Aug 2025 – Aug 2025 | below 0.005 µg/l 1 Aug 2025 |
| Perfluorododecanoic acid 8894 | River water | 1 | Aug 2025 – Aug 2025 | below 0.002 µg/l 1 Aug 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluorohexanoic acid 8888 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluorononanoic acid 8891 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | Aug 2025 – Aug 2025 | below 0.002 µg/l 1 Aug 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluorooctanoic acid 8890 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Aug 2025 – Aug 2025 | below 0.0005 µg/l 1 Aug 2025 |
| Perfluoropentanoic acid 8887 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Aug 2025 – Aug 2025 | below 0.006 µg/l 1 Aug 2025 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Aug 2025 – Aug 2025 | below 0.002 µg/l 1 Aug 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Aug 2025 – Aug 2025 | below 0.004 µg/l 1 Aug 2025 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Aug 2025 – Aug 2025 | below 0.001 µg/l 1 Aug 2025 |
| Solids, Suspended at 105 C 0135 | River water | 22 | Apr 2024 – Mar 2025 | 21 mg/l 20 Mar 2025 |
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.