Great Raveley Drain Wood Walton Fen Sluice
EA name: GT.RAVELEY DRN.WOOD WALTON FEN SLUICE
Environment Agency sampling point AN-53M46 · 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
- 12 Aug 2026, 09:5250 days 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 Planned investigation (local monitoring)
- Where
- National Grid 523500, 284800As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- Not placedGrid reference only to 100 m and no line carries the name it gives, so position alone cannot choose. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (29 samples)
Planned investigation (local monitoring) (5 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
56%
Sampled 12 Aug 2026, 50 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Aug 2026, 09:52 | 56 | 56% |
| 2 Jul 2026, 12:19 | 118.5 | 118.5% |
| 2 Jun 2026, 10:42 | 85.1 | 85.1% |
| 20 May 2026, 13:20 | 90.3 | 90.3% |
| 16 Apr 2026, 11:56 | 94.1 | 94.1% |
| 16 Mar 2026, 12:47 | 90.8 | 90.8% |
| 5 Feb 2026, 11:50 | 88.4 | 88.4% |
| 16 Jan 2026, 12:58 | 89.7 | 89.7% |
| 9 Dec 2025, 12:46 | 90.4 | 90.4% |
| 10 Nov 2025, 13:01 | 51.3 | 51.3% |
| 20 Oct 2025, 12:50 | 37.3 | 37.3% |
| 9 Sep 2025, 10:10 | 31.8 | 31.8% |
| 11 Aug 2025, 12:45 | 91.2 | 91.2% |
| 7 Jul 2025, 10:50 | 100.9 | 100.9% |
| 9 Jun 2025, 10:20 | 84.4 | 84.4% |
| 8 May 2025, 15:02 | 99.2 | 99.2% |
| 7 Apr 2025, 14:04 | 106.3 | 106.3% |
| 11 Mar 2025, 14:01 | 107.9 | 107.9% |
| 6 Feb 2025, 10:32 | 66.7 | 66.7% |
| 23 Jan 2025, 09:30 | 82.2 | 82.2% |
| 5 Dec 2024, 12:56 | 76.5 | 76.5% |
| 18 Nov 2024, 14:13 | 57 | 57% |
| 14 Oct 2024, 13:54 | 80.8 | 80.8% |
| 16 Sep 2024, 13:23 | 66.3 | 66.3% |
| 19 Aug 2024, 13:01 | 86.9 | 86.9% |
| 15 Jul 2024, 14:46 | 68.9 | 68.9% |
| 19 Jun 2024, 13:24 | 95.7 | 95.7% |
| 4 Mar 2024, 15:06 | 92.4 | 92.4% |
| 6 Feb 2024, 10:52 | 81.1 | 81.1% |
| 8 Jan 2024, 10:48 | 79.7 | 79.7% |
| 5 Dec 2023, 08:59 | 86.4 | 86.4% |
| 3 Nov 2023, 09:16 | 80.5 | 80.5% |
| 3 Oct 2023, 13:35 | 47.2 | 47.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
5 mg/l
Sampled 12 Aug 2026, 50 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Aug 2026, 09:52 | 5 | 5 mg/l |
| 2 Jul 2026, 12:19 | 10.1 | 10.1 mg/l |
| 2 Jun 2026, 10:42 | 7.68 | 7.68 mg/l |
| 20 May 2026, 13:20 | 8.88 | 8.88 mg/l |
| 16 Apr 2026, 11:56 | 9.48 | 9.48 mg/l |
| 16 Mar 2026, 12:47 | 10.6 | 10.6 mg/l |
| 5 Feb 2026, 11:50 | 11 | 11 mg/l |
| 16 Jan 2026, 12:58 | 11.3 | 11.3 mg/l |
| 9 Dec 2025, 12:46 | 10.2 | 10.2 mg/l |
| 10 Nov 2025, 13:01 | 5.55 | 5.55 mg/l |
| 20 Oct 2025, 12:50 | 3.93 | 3.93 mg/l |
| 9 Sep 2025, 10:10 | 3.09 | 3.09 mg/l |
| 11 Aug 2025, 12:45 | 8.1 | 8.1 mg/l |
| 7 Jul 2025, 10:50 | 9.24 | 9.24 mg/l |
| 9 Jun 2025, 10:20 | 7.99 | 7.99 mg/l |
| 8 May 2025, 15:02 | 10.2 | 10.2 mg/l |
| 7 Apr 2025, 14:04 | 11 | 11 mg/l |
| 11 Mar 2025, 14:01 | 12.5 | 12.5 mg/l |
| 6 Feb 2025, 10:32 | 8.89 | 8.89 mg/l |
| 23 Jan 2025, 09:30 | 10.8 | 10.8 mg/l |
| 5 Dec 2024, 12:56 | 9.11 | 9.11 mg/l |
| 18 Nov 2024, 14:13 | 6.67 | 6.67 mg/l |
| 14 Oct 2024, 13:54 | 9.04 | 9.04 mg/l |
| 16 Sep 2024, 13:23 | 6.47 | 6.47 mg/l |
| 19 Aug 2024, 13:01 | 7.79 | 7.79 mg/l |
| 15 Jul 2024, 14:46 | 6.35 | 6.35 mg/l |
| 19 Jun 2024, 13:24 | 8.84 | 8.84 mg/l |
| 4 Mar 2024, 15:06 | 11.2 | 11.2 mg/l |
| 6 Feb 2024, 10:52 | 9.47 | 9.47 mg/l |
| 8 Jan 2024, 10:48 | 10.1 | 10.1 mg/l |
| 5 Dec 2023, 08:59 | 10.7 | 10.7 mg/l |
| 3 Nov 2023, 09:16 | 9.03 | 9.03 mg/l |
| 3 Oct 2023, 13:35 | 4.52 | 4.52 mg/l |
Water temperature
code 0076 · °C
20.8 °C
Sampled 12 Aug 2026, 50 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Aug 2026, 09:52 | 20.8 | 20.8 °C |
| 2 Jul 2026, 12:19 | 23.4 | 23.4 °C |
| 2 Jun 2026, 10:42 | 20.2 | 20.2 °C |
| 20 May 2026, 13:20 | 16 | 16 °C |
| 16 Apr 2026, 11:56 | 14.9 | 14.9 °C |
| 16 Mar 2026, 12:47 | 8.6 | 8.6 °C |
| 5 Feb 2026, 11:50 | 6 | 6 °C |
| 16 Jan 2026, 12:58 | 5.5 | 5.5 °C |
| 9 Dec 2025, 12:46 | 10.1 | 10.1 °C |
| 10 Nov 2025, 13:01 | 11.7 | 11.7 °C |
| 20 Oct 2025, 12:50 | 12.9 | 12.9 °C |
| 9 Sep 2025, 10:10 | 16.6 | 16.6 °C |
| 11 Aug 2025, 12:45 | 21.1 | 21.1 °C |
| 7 Jul 2025, 10:50 | 19.5 | 19.5 °C |
| 9 Jun 2025, 10:20 | 17.9 | 17.9 °C |
| 8 May 2025, 15:02 | 14.2 | 14.2 °C |
| 7 Apr 2025, 14:04 | 13.9 | 13.9 °C |
| 11 Mar 2025, 14:01 | 8.8 | 8.8 °C |
| 6 Feb 2025, 10:32 | 3.3 | 3.3 °C |
| 23 Jan 2025, 09:30 | 3.7 | 3.7 °C |
| 5 Dec 2024, 12:56 | 7.7 | 7.7 °C |
| 18 Nov 2024, 14:13 | 8.4 | 8.4 °C |
| 14 Oct 2024, 13:54 | 10.3 | 10.3 °C |
| 16 Sep 2024, 13:23 | 16.4 | 16.4 °C |
| 19 Aug 2024, 13:01 | 20.6 | 20.6 °C |
| 15 Jul 2024, 14:46 | 19.2 | 19.2 °C |
| 19 Jun 2024, 13:24 | 19.1 | 19.1 °C |
| 4 Mar 2024, 15:06 | 7.1 | 7.1 °C |
| 6 Feb 2024, 10:52 | 8.5 | 8.5 °C |
| 8 Jan 2024, 10:48 | 5.2 | 5.2 °C |
| 5 Dec 2023, 08:59 | 6.2 | 6.2 °C |
| 3 Nov 2023, 09:16 | 10.2 | 10.2 °C |
| 3 Oct 2023, 13:35 | 17.3 | 17.3 °C |
pH
code 0061
7.87
Sampled 20 May 2026, 4 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 13:20 | 7.87 | 7.87 |
| 16 Apr 2026, 11:56 | 8 | 8 |
| 16 Mar 2026, 12:47 | 7.85 | 7.85 |
| 5 Feb 2026, 11:50 | 7.74 | 7.74 |
| 16 Jan 2026, 12:58 | 7.67 | 7.67 |
| 9 Dec 2025, 12:46 | 7.82 | 7.82 |
| 10 Nov 2025, 13:01 | 7.55 | 7.55 |
| 20 Oct 2025, 12:50 | 7.53 | 7.53 |
| 9 Sep 2025, 10:10 | 7.38 | 7.38 |
| 11 Aug 2025, 12:45 | 7.61 | 7.61 |
| 7 Jul 2025, 10:50 | 8.31 | 8.31 |
| 9 Jun 2025, 10:20 | 7.73 | 7.73 |
| 8 May 2025, 15:02 | 8.02 | 8.02 |
| 7 Apr 2025, 14:04 | 7.96 | 7.96 |
| 11 Mar 2025, 14:01 | 8.07 | 8.07 |
| 6 Feb 2025, 10:32 | 7.42 | 7.42 |
| 23 Jan 2025, 09:30 | 7.62 | 7.62 |
| 5 Dec 2024, 12:56 | 7.52 | 7.52 |
| 18 Nov 2024, 14:13 | 7.46 | 7.46 |
| 14 Oct 2024, 13:54 | 7.75 | 7.75 |
| 16 Sep 2024, 13:23 | 7.67 | 7.67 |
| 19 Aug 2024, 13:01 | 7.81 | 7.81 |
| 15 Jul 2024, 14:46 | 7.42 | 7.42 |
| 19 Jun 2024, 13:24 | 7.81 | 7.81 |
| 4 Mar 2024, 15:06 | 7.65 | 7.65 |
| 6 Feb 2024, 10:52 | 7.7 | 7.7 |
| 8 Jan 2024, 10:48 | 7.48 | 7.48 |
| 5 Dec 2023, 08:59 | 7.59 | 7.59 |
| 3 Nov 2023, 09:16 | 7.73 | 7.73 |
| 3 Oct 2023, 13:35 | 7.43 | 7.43 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 12 Aug 2026, 50 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Aug 2026, 09:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jul 2026, 12:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jun 2026, 10:42 | 0.042 | 0.042 mg/l |
| 20 May 2026, 13:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Apr 2026, 11:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Mar 2026, 12:47 | 0.23 | 0.23 mg/l |
| 5 Feb 2026, 11:50 | 0.083 | 0.083 mg/l |
| 16 Jan 2026, 12:58 | 0.049 | 0.049 mg/l |
| 9 Dec 2025, 12:46 | 0.05 | 0.05 mg/l |
| 10 Nov 2025, 13:01 | 0.26 | 0.26 mg/l |
| 20 Oct 2025, 12:50 | 0.2 | 0.2 mg/l |
| 9 Sep 2025, 10:10 | 0.047 | 0.047 mg/l |
| 11 Aug 2025, 12:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Jul 2025, 10:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jun 2025, 10:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 May 2025, 15:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Apr 2025, 14:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Mar 2025, 14:01 | 0.068 | 0.068 mg/l |
| 6 Feb 2025, 10:32 | 0.23 | 0.23 mg/l |
| 23 Jan 2025, 09:30 | 0.18 | 0.18 mg/l |
| 5 Dec 2024, 12:56 | 0.19 | 0.19 mg/l |
| 18 Nov 2024, 14:13 | 0.18 | 0.18 mg/l |
| 14 Oct 2024, 13:54 | 0.059 | 0.059 mg/l |
| 16 Sep 2024, 13:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Aug 2024, 13:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jul 2024, 14:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Jun 2024, 13:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2024, 15:06 | 0.15 | 0.15 mg/l |
| 8 Jan 2024, 10:48 | 0.29 | 0.29 mg/l |
| 5 Dec 2023, 08:59 | 0.095 | 0.095 mg/l |
| 3 Nov 2023, 09:16 | 0.076 | 0.076 mg/l |
| 3 Oct 2023, 13:35 | 0.062 | 0.062 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
below 0.196 mg/l (not detected above this)
Sampled 12 Aug 2026, 50 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Aug 2026, 09:52 | <0.196 | below 0.196 mg/l (not detected above this) |
| 2 Jul 2026, 12:19 | 0.799 | 0.799 mg/l |
| 2 Jun 2026, 10:42 | 2.97 | 2.97 mg/l |
| 20 May 2026, 13:20 | 3.08 | 3.08 mg/l |
| 16 Apr 2026, 11:56 | 5.98 | 5.98 mg/l |
| 16 Mar 2026, 12:47 | 9.8 | 9.8 mg/l |
| 5 Feb 2026, 11:50 | 14.9 | 14.9 mg/l |
| 16 Jan 2026, 12:58 | 13 | 13 mg/l |
| 9 Dec 2025, 12:46 | 25.9 | 25.9 mg/l |
| 10 Nov 2025, 13:01 | 7.23 | 7.23 mg/l |
| 20 Oct 2025, 12:50 | 0.261 | 0.261 mg/l |
| 9 Sep 2025, 10:10 | <0.196 | below 0.196 mg/l (not detected above this) |
| 11 Aug 2025, 12:45 | <0.196 | below 0.196 mg/l (not detected above this) |
| 7 Jul 2025, 10:50 | <0.196 | below 0.196 mg/l (not detected above this) |
| 9 Jun 2025, 10:20 | 1.28 | 1.28 mg/l |
| 8 May 2025, 15:02 | 4.28 | 4.28 mg/l |
| 7 Apr 2025, 14:04 | 8.67 | 8.67 mg/l |
| 11 Mar 2025, 14:01 | 13.9 | 13.9 mg/l |
| 6 Feb 2025, 10:32 | 8.29 | 8.29 mg/l |
| 23 Jan 2025, 09:30 | 12.9 | 12.9 mg/l |
| 5 Dec 2024, 12:56 | 13.9 | 13.9 mg/l |
| 18 Nov 2024, 14:13 | 5.85 | 5.85 mg/l |
| 14 Oct 2024, 13:54 | 11.9 | 11.9 mg/l |
| 16 Sep 2024, 13:23 | 0.194 | 0.194 mg/l |
| 19 Aug 2024, 13:01 | <0.196 | below 0.196 mg/l (not detected above this) |
| 15 Jul 2024, 14:46 | 2.76 | 2.76 mg/l |
| 19 Jun 2024, 13:24 | 5.45 | 5.45 mg/l |
| 4 Mar 2024, 15:06 | 11.9 | 11.9 mg/l |
| 6 Feb 2024, 10:52 | 14.9 | 14.9 mg/l |
| 8 Jan 2024, 10:48 | 12.9 | 12.9 mg/l |
| 5 Dec 2023, 08:59 | 17 | 17 mg/l |
| 3 Nov 2023, 09:16 | 19 | 19 mg/l |
| 3 Oct 2023, 13:35 | 2.27 | 2.27 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.023 mg/l
Sampled 12 Aug 2026, 50 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Aug 2026, 09:52 | 0.023 | 0.023 mg/l |
| 2 Jul 2026, 12:19 | <0.01 | below 0.01 mg/l (not detected above this) |
| 2 Jun 2026, 10:42 | <0.01 | below 0.01 mg/l (not detected above this) |
| 20 May 2026, 13:20 | <0.01 | below 0.01 mg/l (not detected above this) |
| 16 Apr 2026, 11:56 | <0.01 | below 0.01 mg/l (not detected above this) |
| 16 Mar 2026, 12:47 | 0.031 | 0.031 mg/l |
| 5 Feb 2026, 11:50 | 0.038 | 0.038 mg/l |
| 16 Jan 2026, 12:58 | 0.088 | 0.088 mg/l |
| 9 Dec 2025, 12:46 | 0.042 | 0.042 mg/l |
| 10 Nov 2025, 13:01 | 0.016 | 0.016 mg/l |
| 20 Oct 2025, 12:50 | 0.053 | 0.053 mg/l |
| 9 Sep 2025, 10:10 | 0.043 | 0.043 mg/l |
| 11 Aug 2025, 12:45 | <0.01 | below 0.01 mg/l (not detected above this) |
| 7 Jul 2025, 10:50 | 0.015 | 0.015 mg/l |
| 9 Jun 2025, 10:20 | <0.01 | below 0.01 mg/l (not detected above this) |
| 8 May 2025, 15:02 | <0.01 | below 0.01 mg/l (not detected above this) |
| 7 Apr 2025, 14:04 | <0.01 | below 0.01 mg/l (not detected above this) |
| 11 Mar 2025, 14:01 | 0.01 | 0.01 mg/l |
| 6 Feb 2025, 10:32 | 0.047 | 0.047 mg/l |
| 23 Jan 2025, 09:30 | 0.04 | 0.04 mg/l |
| 5 Dec 2024, 12:56 | 0.055 | 0.055 mg/l |
| 18 Nov 2024, 14:13 | 0.012 | 0.012 mg/l |
| 14 Oct 2024, 13:54 | 0.054 | 0.054 mg/l |
| 16 Sep 2024, 13:23 | 0.04 | 0.04 mg/l |
| 19 Aug 2024, 13:01 | 0.02 | 0.02 mg/l |
| 15 Jul 2024, 14:46 | <0.01 | below 0.01 mg/l (not detected above this) |
| 19 Jun 2024, 13:24 | <0.01 | below 0.01 mg/l (not detected above this) |
| 4 Mar 2024, 15:06 | 0.03 | 0.03 mg/l |
| 6 Feb 2024, 10:52 | 0.037 | 0.037 mg/l |
| 8 Jan 2024, 10:48 | 0.034 | 0.034 mg/l |
| 5 Dec 2023, 08:59 | 0.047 | 0.047 mg/l |
| 3 Nov 2023, 09:16 | 0.047 | 0.047 mg/l |
| 3 Oct 2023, 13:35 | 0.054 | 0.054 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
844 µS/cm
Sampled 12 Aug 2026, 50 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 12 Aug 2026, 09:52 | 844 | 844 µS/cm |
| 2 Jul 2026, 12:19 | 1067 | 1067 µS/cm |
| 2 Jun 2026, 10:42 | 1380 | 1380 µS/cm |
| 20 May 2026, 13:20 | 1454 | 1454 µS/cm |
| 16 Apr 2026, 11:56 | 1431 | 1431 µS/cm |
| 16 Mar 2026, 12:47 | 964 | 964 µS/cm |
| 5 Feb 2026, 11:50 | 917 | 917 µS/cm |
| 16 Jan 2026, 12:58 | 590 | 590 µS/cm |
| 9 Dec 2025, 12:46 | 950 | 950 µS/cm |
| 10 Nov 2025, 13:01 | 1201 | 1201 µS/cm |
| 20 Oct 2025, 12:50 | 1085 | 1085 µS/cm |
| 9 Sep 2025, 10:10 | 850 | 850 µS/cm |
| 11 Aug 2025, 12:45 | 847 | 847 µS/cm |
| 7 Jul 2025, 10:50 | 1697 | 1697 µS/cm |
| 9 Jun 2025, 10:20 | 1519 | 1519 µS/cm |
| 8 May 2025, 15:02 | 1641 | 1641 µS/cm |
| 7 Apr 2025, 14:04 | 1590 | 1590 µS/cm |
| 11 Mar 2025, 14:01 | 1239 | 1239 µS/cm |
| 6 Feb 2025, 10:32 | 1123 | 1123 µS/cm |
| 23 Jan 2025, 09:30 | 1275 | 1275 µS/cm |
| 5 Dec 2024, 12:56 | 1151 | 1151 µS/cm |
| 18 Nov 2024, 14:13 | 1440 | 1440 µS/cm |
| 14 Oct 2024, 13:54 | 842 | 842 µS/cm |
| 16 Sep 2024, 13:23 | 1028 | 1028 µS/cm |
| 19 Aug 2024, 13:01 | 1130 | 1130 µS/cm |
| 15 Jul 2024, 14:46 | 1100 | 1100 µS/cm |
| 19 Jun 2024, 13:24 | 1196 | 1196 µS/cm |
| 4 Mar 2024, 15:06 | 947 | 947 µS/cm |
| 6 Feb 2024, 10:52 | 1387 | 1387 µS/cm |
| 8 Jan 2024, 10:48 | 966 | 966 µS/cm |
| 5 Dec 2023, 08:59 | 814 | 814 µS/cm |
| 3 Nov 2023, 09:16 | 863 | 863 µS/cm |
| 3 Oct 2023, 13:35 | 731 | 731 µS/cm |
Everything measured here
68 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 68 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 33 | Oct 2023 – Aug 2026 | 56% 12 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 33 | Oct 2023 – Aug 2026 | 5 mg/l 12 Aug 2026 |
| Temperature of Water 0076 | River water | 33 | Oct 2023 – Aug 2026 | 20.8 °C 12 Aug 2026 |
| pH 0061 | River water | 30 | Oct 2023 – May 2026 | 7.87 20 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 32 | Oct 2023 – Aug 2026 | below 0.03 mg/l 12 Aug 2026 |
| Nitrate as N 0117 | River water | 33 | Oct 2023 – Aug 2026 | below 0.196 mg/l 12 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 33 | Oct 2023 – Aug 2026 | 0.023 mg/l 12 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 33 | Oct 2023 – Aug 2026 | 844 µS/cm 12 Aug 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 19 Jun 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 19 Jun 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 19 Jun 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 19 Jun 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 19 Jun 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 19 Jun 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 19 Jun 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Jun 2024 – Jun 2024 | below 0.004 µg/l 19 Jun 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Jun 2024 – Jun 2024 | below 0.005 µg/l 19 Jun 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 19 Jun 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 19 Jun 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 19 Jun 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 19 Jun 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 30 | Oct 2023 – May 2026 | 190 mg/l 20 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 29 | Oct 2023 – May 2026 | below 0.00063 mg/l 20 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 27 | Jun 2024 – Aug 2026 | below 5 mg/l 12 Aug 2026 |
| Chemical Oxygen Demand :- {COD} 0092 | River water | 5 | Apr 2026 – Aug 2026 | 21 mg/l 12 Aug 2026 |
| Chloride 0172 | River water | 5 | Apr 2026 – Aug 2026 | 74 mg/l 12 Aug 2026 |
| Chlorophyll : Acetone Extract 7887 | River water | 5 | Apr 2026 – Aug 2026 | 11 µg/l 12 Aug 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 19 Jun 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 19 Jun 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 19 Jun 2024 |
| Nitrite as N 0118 | River water | 33 | Oct 2023 – Aug 2026 | below 0.004 mg/l 12 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 33 | Oct 2023 – Aug 2026 | below 0.2 mg/l 12 Aug 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 19 Jun 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 19 Jun 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 19 Jun 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 19 Jun 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 19 Jun 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Jun 2024 – Jun 2024 | 0.0037 µg/l 19 Jun 2024 |
| Perfluorobutanoic acid 2995 | River water | 1 | Jun 2024 – Jun 2024 | 0.011 µg/l 19 Jun 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Jun 2024 – Jun 2024 | 0.00054 µg/l 19 Jun 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 19 Jun 2024 |
| Perfluorodecanoic acid 8892 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 19 Jun 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Jun 2024 – Jun 2024 | below 0.005 µg/l 19 Jun 2024 |
| Perfluorododecanoic acid 8894 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 19 Jun 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 19 Jun 2024 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Jun 2024 – Jun 2024 | 0.0021 µg/l 19 Jun 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 19 Jun 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Jun 2024 – Jun 2024 | 0.00097 µg/l 19 Jun 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Jun 2024 – Jun 2024 | 0.0031 µg/l 19 Jun 2024 |
| Perfluorohexanoic acid 8888 | River water | 1 | Jun 2024 – Jun 2024 | 0.0047 µg/l 19 Jun 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 19 Jun 2024 |
| Perfluorononanoic acid 8891 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 19 Jun 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 19 Jun 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 19 Jun 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Jun 2024 – Jun 2024 | 0.0019 µg/l 19 Jun 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Jun 2024 – Jun 2024 | 0.0013 µg/l 19 Jun 2024 |
| Perfluorooctanoate anion 9274 | River water | 5 | Nov 2023 – Mar 2024 | 0.00092 µg/l 4 Mar 2024 |
| Perfluorooctanoic acid 8890 | River water | 1 | Jun 2024 – Jun 2024 | 0.0022 µg/l 19 Jun 2024 |
| Perfluorooctylsulphonate anion 9276 | River water | 4 | Nov 2023 – Mar 2024 | 0.0017 µg/l 4 Mar 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 19 Jun 2024 |
| Perfluoropentanoic acid 8887 | River water | 1 | Jun 2024 – Jun 2024 | below 0.009 µg/l 19 Jun 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Jun 2024 – Jun 2024 | below 0.006 µg/l 19 Jun 2024 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Jun 2024 – Jun 2024 | below 0.005 µg/l 19 Jun 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Jun 2024 – Jun 2024 | below 0.004 µg/l 19 Jun 2024 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 19 Jun 2024 |
| Phosphorus, Total as P 0348 | River water | 6 | Oct 2023 – Mar 2024 | 0.08 mg/l 4 Mar 2024 |
| Silica, reactive as SiO2 0182 | River water | 5 | Apr 2026 – Aug 2026 | 0.27 mg/l 12 Aug 2026 |
| Solids, Suspended at 105 C 0135 | River water | 5 | Apr 2026 – Aug 2026 | 4.3 mg/l 12 Aug 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.