River Wensum Hellesdon Meadow
EA name: R.WENSUM HELLESDON MEADOW (also listed as “RSN0357 R.WENSUM HELLESDON MEADOW”)
Environment Agency sampling point AN-RSN0357 · 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
- 2 Mar 2026, 12:277 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
- 29 since 2 Jan 2024 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 620363, 309563As published, to the nearest 1 m. Open in a map
- River, by its own name
- Wensum
- River, by the map
- River WensumPlaced on the river its name gives, 3 m from the line.
- Next gauge downstream
- Brundall On the River Yare · 20 km along the river
- Nearest gauge upstream
- Costessey Mill On the River Wensum · 6.2 km along the riverCOSTESSEY MILL SLUICE 6.2 km along the riverCOSTESSEY MILL SLUICE 6.2 km along the river
- Why it was sampled
- Monitoring (national agency policy) (25 samples)
Planned investigation (local monitoring) (4 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96%
Sampled 2 Mar 2026, 7 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:27 | 96 | 96% |
| 6 Feb 2026, 10:30 | 97.3 | 97.3% |
| 7 Jan 2026, 13:08 | 97.2 | 97.2% |
| 12 Dec 2025, 10:19 | 91.1 | 91.1% |
| 28 Nov 2025, 14:53 | 91.6 | 91.6% |
| 9 Oct 2025, 14:38 | 85.2 | 85.2% |
| 1 Sep 2025, 10:56 | 85.9 | 85.9% |
| 13 Aug 2025, 14:23 | 108.8 | 108.8% |
| 31 Jul 2025, 11:59 | 95.7 | 95.7% |
| 16 Jun 2025, 15:48 | 111.3 | 111.3% |
| 8 May 2025, 15:30 | 104.1 | 104.1% |
| 1 Apr 2025, 09:16 | 89.3 | 89.3% |
| 6 Mar 2025, 10:31 | 98.5 | 98.5% |
| 10 Feb 2025, 11:56 | 96.3 | 96.3% |
| 7 Jan 2025, 13:25 | 96.7 | 96.7% |
| 2 Dec 2024, 14:02 | 92 | 92% |
| 1 Nov 2024, 13:11 | 90 | 90% |
| 7 Oct 2024, 10:02 | 86.8 | 86.8% |
| 2 Sep 2024, 11:01 | 88.1 | 88.1% |
| 5 Aug 2024, 09:36 | 74.8 | 74.8% |
| 1 Jul 2024, 10:44 | 90.6 | 90.6% |
| 4 Jun 2024, 13:56 | 90.6 | 90.6% |
| 3 Jun 2024, 09:59 | 90 | 90% |
| 1 May 2024, 11:36 | 97.3 | 97.3% |
| 5 Apr 2024, 13:45 | 99.3 | 99.3% |
| 1 Mar 2024, 12:21 | 93.2 | 93.2% |
| 5 Feb 2024, 10:26 | 94.6 | 94.6% |
| 2 Jan 2024, 14:26 | 93.3 | 93.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.8 mg/l
Sampled 2 Mar 2026, 7 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:27 | 10.8 | 10.8 mg/l |
| 6 Feb 2026, 10:30 | 12.2 | 12.2 mg/l |
| 7 Jan 2026, 13:08 | 13.4 | 13.4 mg/l |
| 12 Dec 2025, 10:19 | 10.6 | 10.6 mg/l |
| 28 Nov 2025, 14:53 | 10.7 | 10.7 mg/l |
| 9 Oct 2025, 14:38 | 8.89 | 8.89 mg/l |
| 1 Sep 2025, 10:56 | 8.21 | 8.21 mg/l |
| 13 Aug 2025, 14:23 | 9.69 | 9.69 mg/l |
| 31 Jul 2025, 11:59 | 8.96 | 8.96 mg/l |
| 16 Jun 2025, 15:48 | 9.84 | 9.84 mg/l |
| 8 May 2025, 15:30 | 11 | 11 mg/l |
| 1 Apr 2025, 09:16 | 10.4 | 10.4 mg/l |
| 6 Mar 2025, 10:31 | 12 | 12 mg/l |
| 10 Feb 2025, 11:56 | 12 | 12 mg/l |
| 7 Jan 2025, 13:25 | 11.8 | 11.8 mg/l |
| 2 Dec 2024, 14:02 | 10.8 | 10.8 mg/l |
| 1 Nov 2024, 13:11 | 9.88 | 9.88 mg/l |
| 7 Oct 2024, 10:02 | 9.39 | 9.39 mg/l |
| 2 Sep 2024, 11:01 | 8.4 | 8.4 mg/l |
| 5 Aug 2024, 09:36 | 7.02 | 7.02 mg/l |
| 1 Jul 2024, 10:44 | 8.68 | 8.68 mg/l |
| 4 Jun 2024, 13:56 | 8.81 | 8.81 mg/l |
| 3 Jun 2024, 09:59 | 8.91 | 8.91 mg/l |
| 1 May 2024, 11:36 | 10.2 | 10.2 mg/l |
| 5 Apr 2024, 13:45 | 10.4 | 10.4 mg/l |
| 1 Mar 2024, 12:21 | 11.2 | 11.2 mg/l |
| 5 Feb 2024, 10:26 | 10.8 | 10.8 mg/l |
| 2 Jan 2024, 14:26 | 10.9 | 10.9 mg/l |
Water temperature
code 0076 · °C
10.1 °C
Sampled 2 Mar 2026, 7 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:27 | 10.1 | 10.1 °C |
| 6 Feb 2026, 10:30 | 5.8 | 5.8 °C |
| 7 Jan 2026, 13:08 | 2.1 | 2.1 °C |
| 12 Dec 2025, 10:19 | 8.5 | 8.5 °C |
| 28 Nov 2025, 14:53 | 8.5 | 8.5 °C |
| 9 Oct 2025, 14:38 | 13.3 | 13.3 °C |
| 1 Sep 2025, 10:56 | 17.4 | 17.4 °C |
| 13 Aug 2025, 14:23 | 20.9 | 20.9 °C |
| 31 Jul 2025, 11:59 | 18.4 | 18.4 °C |
| 16 Jun 2025, 15:48 | 21.3 | 21.3 °C |
| 8 May 2025, 15:30 | 12.6 | 12.6 °C |
| 1 Apr 2025, 09:16 | 8.7 | 8.7 °C |
| 6 Mar 2025, 10:31 | 6.7 | 6.7 °C |
| 10 Feb 2025, 11:56 | 5.8 | 5.8 °C |
| 7 Jan 2025, 13:25 | 6.6 | 6.6 °C |
| 2 Dec 2024, 14:02 | 8.3 | 8.3 °C |
| 1 Nov 2024, 13:11 | 11.1 | 11.1 °C |
| 7 Oct 2024, 10:02 | 11.7 | 11.7 °C |
| 2 Sep 2024, 11:01 | 17.5 | 17.5 °C |
| 5 Aug 2024, 09:36 | 18.3 | 18.3 °C |
| 1 Jul 2024, 10:44 | 17.3 | 17.3 °C |
| 4 Jun 2024, 13:56 | 16.6 | 16.6 °C |
| 3 Jun 2024, 09:59 | 15.7 | 15.7 °C |
| 1 May 2024, 11:36 | 13.2 | 13.2 °C |
| 5 Apr 2024, 13:45 | 13.2 | 13.2 °C |
| 1 Mar 2024, 12:21 | 7.5 | 7.5 °C |
| 5 Feb 2024, 10:26 | 9.6 | 9.6 °C |
| 2 Jan 2024, 14:26 | 8.6 | 8.6 °C |
pH
code 0061
8.08
Sampled 2 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:27 | 8.08 | 8.08 |
| 6 Feb 2026, 10:30 | 8.02 | 8.02 |
| 7 Jan 2026, 13:08 | 8.11 | 8.11 |
| 12 Dec 2025, 10:19 | 8 | 8 |
| 28 Nov 2025, 14:53 | 8 | 8 |
| 9 Oct 2025, 14:38 | 8.1 | 8.1 |
| 1 Sep 2025, 12:09 | 8.1 | 8.1 |
| 1 Sep 2025, 10:56 | 8.03 | 8.03 |
| 13 Aug 2025, 14:23 | 7.96 | 7.96 |
| 31 Jul 2025, 11:59 | 8.03 | 8.03 |
| 16 Jun 2025, 15:48 | 8.23 | 8.23 |
| 8 May 2025, 15:30 | 8.24 | 8.24 |
| 1 Apr 2025, 09:16 | 8.21 | 8.21 |
| 6 Mar 2025, 10:31 | 8.2 | 8.2 |
| 10 Feb 2025, 11:56 | 8.22 | 8.22 |
| 7 Jan 2025, 13:25 | 8.06 | 8.06 |
| 2 Dec 2024, 14:02 | 7.92 | 7.92 |
| 1 Nov 2024, 13:11 | 7.85 | 7.85 |
| 7 Oct 2024, 10:02 | 7.98 | 7.98 |
| 2 Sep 2024, 11:01 | 7.96 | 7.96 |
| 5 Aug 2024, 09:36 | 7.68 | 7.68 |
| 1 Jul 2024, 10:44 | 8.2 | 8.2 |
| 4 Jun 2024, 13:56 | 8.12 | 8.12 |
| 3 Jun 2024, 09:59 | 7.84 | 7.84 |
| 1 May 2024, 11:36 | 8.13 | 8.13 |
| 5 Apr 2024, 13:45 | 7.39 | 7.39 |
| 1 Mar 2024, 12:21 | 8.06 | 8.06 |
| 5 Feb 2024, 10:26 | 8.05 | 8.05 |
| 2 Jan 2024, 14:26 | 8.06 | 8.06 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 2 Mar 2026, 7 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Feb 2026, 10:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Jan 2026, 13:08 | 0.14 | 0.14 mg/l |
| 12 Dec 2025, 10:19 | 0.014 | 0.014 mg/l |
| 28 Nov 2025, 14:53 | 0.031 | 0.031 mg/l |
| 9 Oct 2025, 14:38 | 0.0064 | 0.0064 mg/l |
| 1 Sep 2025, 10:56 | 0.012 | 0.012 mg/l |
| 13 Aug 2025, 14:23 | 0.0087 | 0.0087 mg/l |
| 31 Jul 2025, 11:59 | 0.0093 | 0.0093 mg/l |
| 16 Jun 2025, 15:48 | 0.017 | 0.017 mg/l |
| 8 May 2025, 15:30 | 0.0084 | 0.0084 mg/l |
| 1 Apr 2025, 09:16 | 0.0086 | 0.0086 mg/l |
| 6 Mar 2025, 10:31 | 0.011 | 0.011 mg/l |
| 10 Feb 2025, 11:56 | 0.014 | 0.014 mg/l |
| 7 Jan 2025, 13:25 | 0.039 | 0.039 mg/l |
| 2 Dec 2024, 14:02 | 0.029 | 0.029 mg/l |
| 1 Nov 2024, 13:11 | 0.015 | 0.015 mg/l |
| 7 Oct 2024, 10:02 | 0.014 | 0.014 mg/l |
| 2 Sep 2024, 11:01 | 0.0079 | 0.0079 mg/l |
| 5 Aug 2024, 09:36 | 0.031 | 0.031 mg/l |
| 1 Jul 2024, 10:44 | 0.11 | 0.11 mg/l |
| 4 Jun 2024, 13:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jun 2024, 09:59 | 0.021 | 0.021 mg/l |
| 1 May 2024, 11:36 | 0.016 | 0.016 mg/l |
| 5 Apr 2024, 13:45 | 0.029 | 0.029 mg/l |
| 1 Mar 2024, 12:21 | 0.029 | 0.029 mg/l |
| 5 Feb 2024, 10:26 | 0.038 | 0.038 mg/l |
| 2 Jan 2024, 14:26 | 0.034 | 0.034 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
6.19 mg/l
Sampled 2 Mar 2026, 7 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:27 | 6.19 | 6.19 mg/l |
| 6 Feb 2026, 10:30 | 7.18 | 7.18 mg/l |
| 7 Jan 2026, 13:08 | 7.07 | 7.07 mg/l |
| 12 Dec 2025, 10:19 | 7.57 | 7.57 mg/l |
| 28 Nov 2025, 14:53 | 7.06 | 7.06 mg/l |
| 9 Oct 2025, 14:38 | 6.39 | 6.39 mg/l |
| 1 Sep 2025, 10:56 | 5.29 | 5.29 mg/l |
| 13 Aug 2025, 14:23 | 4.39 | 4.39 mg/l |
| 31 Jul 2025, 11:59 | 4.39 | 4.39 mg/l |
| 16 Jun 2025, 15:48 | 4.58 | 4.58 mg/l |
| 8 May 2025, 15:30 | 6.18 | 6.18 mg/l |
| 1 Apr 2025, 09:16 | 7.09 | 7.09 mg/l |
| 6 Mar 2025, 10:31 | 6.98 | 6.98 mg/l |
| 10 Feb 2025, 11:56 | 7.48 | 7.48 mg/l |
| 7 Jan 2025, 13:25 | 6.56 | 6.56 mg/l |
| 2 Dec 2024, 14:02 | 6.17 | 6.17 mg/l |
| 1 Nov 2024, 13:11 | 6.19 | 6.19 mg/l |
| 7 Oct 2024, 10:02 | 5.79 | 5.79 mg/l |
| 2 Sep 2024, 11:01 | 5.49 | 5.49 mg/l |
| 5 Aug 2024, 09:36 | 4.79 | 4.79 mg/l |
| 1 Jul 2024, 10:44 | 5.69 | 5.69 mg/l |
| 4 Jun 2024, 13:56 | 3.68 | 3.68 mg/l |
| 3 Jun 2024, 09:59 | 3.78 | 3.78 mg/l |
| 1 May 2024, 11:36 | 5.68 | 5.68 mg/l |
| 5 Apr 2024, 13:45 | 6.18 | 6.18 mg/l |
| 1 Mar 2024, 12:21 | 4.78 | 4.78 mg/l |
| 5 Feb 2024, 10:26 | 6.97 | 6.97 mg/l |
| 2 Jan 2024, 14:26 | 5.37 | 5.37 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.05 mg/l
Sampled 2 Mar 2026, 7 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:27 | 0.05 | 0.05 mg/l |
| 6 Feb 2026, 10:30 | 0.058 | 0.058 mg/l |
| 7 Jan 2026, 13:08 | 0.058 | 0.058 mg/l |
| 12 Dec 2025, 10:19 | 0.077 | 0.077 mg/l |
| 28 Nov 2025, 14:53 | 0.072 | 0.072 mg/l |
| 9 Oct 2025, 14:38 | 0.074 | 0.074 mg/l |
| 1 Sep 2025, 10:56 | 0.077 | 0.077 mg/l |
| 13 Aug 2025, 14:23 | 0.049 | 0.049 mg/l |
| 31 Jul 2025, 11:59 | 0.077 | 0.077 mg/l |
| 16 Jun 2025, 15:48 | 0.054 | 0.054 mg/l |
| 8 May 2025, 15:30 | 0.036 | 0.036 mg/l |
| 1 Apr 2025, 09:16 | 0.039 | 0.039 mg/l |
| 6 Mar 2025, 10:31 | 0.043 | 0.043 mg/l |
| 10 Feb 2025, 11:56 | 0.054 | 0.054 mg/l |
| 7 Jan 2025, 13:25 | 0.075 | 0.075 mg/l |
| 2 Dec 2024, 14:02 | 0.062 | 0.062 mg/l |
| 1 Nov 2024, 13:11 | 0.064 | 0.064 mg/l |
| 7 Oct 2024, 10:02 | 0.073 | 0.073 mg/l |
| 2 Sep 2024, 11:01 | 0.052 | 0.052 mg/l |
| 5 Aug 2024, 09:36 | 0.063 | 0.063 mg/l |
| 1 Jul 2024, 10:44 | 0.045 | 0.045 mg/l |
| 4 Jun 2024, 13:56 | 0.037 | 0.037 mg/l |
| 3 Jun 2024, 09:59 | 0.041 | 0.041 mg/l |
| 1 May 2024, 11:36 | 0.04 | 0.04 mg/l |
| 5 Apr 2024, 13:45 | 0.035 | 0.035 mg/l |
| 1 Mar 2024, 12:21 | 0.022 | 0.022 mg/l |
| 5 Feb 2024, 10:26 | 0.056 | 0.056 mg/l |
| 2 Jan 2024, 14:26 | 0.072 | 0.072 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
718 µS/cm
Sampled 2 Mar 2026, 7 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:27 | 718 | 718 µS/cm |
| 6 Feb 2026, 10:30 | 725 | 725 µS/cm |
| 7 Jan 2026, 13:08 | 870 | 870 µS/cm |
| 12 Dec 2025, 10:19 | 724 | 724 µS/cm |
| 28 Nov 2025, 14:53 | 752 | 752 µS/cm |
| 9 Oct 2025, 14:38 | 962 | 962 µS/cm |
| 1 Sep 2025, 10:56 | 773 | 773 µS/cm |
| 13 Aug 2025, 14:23 | 741 | 741 µS/cm |
| 31 Jul 2025, 11:59 | 733 | 733 µS/cm |
| 16 Jun 2025, 15:48 | 816 | 816 µS/cm |
| 8 May 2025, 15:30 | 752 | 752 µS/cm |
| 1 Apr 2025, 09:16 | 754 | 754 µS/cm |
| 6 Mar 2025, 10:31 | 713 | 713 µS/cm |
| 10 Feb 2025, 11:56 | 771 | 771 µS/cm |
| 7 Jan 2025, 13:25 | 746 | 746 µS/cm |
| 2 Dec 2024, 14:02 | 748 | 748 µS/cm |
| 1 Nov 2024, 13:11 | 765 | 765 µS/cm |
| 7 Oct 2024, 10:02 | 729 | 729 µS/cm |
| 2 Sep 2024, 11:01 | 743 | 743 µS/cm |
| 5 Aug 2024, 09:36 | 754 | 754 µS/cm |
| 1 Jul 2024, 10:44 | 806 | 806 µS/cm |
| 4 Jun 2024, 13:56 | 779 | 779 µS/cm |
| 3 Jun 2024, 09:59 | 664 | 664 µS/cm |
| 1 May 2024, 11:36 | 721 | 721 µS/cm |
| 5 Apr 2024, 13:45 | 818 | 818 µS/cm |
| 1 Mar 2024, 12:21 | 647 | 647 µS/cm |
| 5 Feb 2024, 10:26 | 768 | 768 µS/cm |
| 2 Jan 2024, 14:26 | 790 | 790 µS/cm |
Everything measured here
118 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 118 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 28 | Jan 2024 – Mar 2026 | 96% 2 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 28 | Jan 2024 – Mar 2026 | 10.8 mg/l 2 Mar 2026 |
| Temperature of Water 0076 | River water | 28 | Jan 2024 – Mar 2026 | 10.1 °C 2 Mar 2026 |
| pH 0061 | River water | 29 | Jan 2024 – Mar 2026 | 8.08 2 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 28 | Jan 2024 – Mar 2026 | below 0.03 mg/l 2 Mar 2026 |
| Nitrate as N 0117 | River water | 28 | Jan 2024 – Mar 2026 | 6.19 mg/l 2 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 28 | Jan 2024 – Mar 2026 | 0.05 mg/l 2 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 28 | Jan 2024 – Mar 2026 | 718 µS/cm 2 Mar 2026 |
| 2,3,6-TBA :- {2,3,6-Trichlorobenzoic acid} 7726 | River water | 4 | Sep 2025 – Dec 2025 | below 0.02 µg/l 12 Dec 2025 |
| 2,4,5-T :- {2,4,5-Trichlorophenoxyacetic acid} 3546 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| 2,4-D :- {2,4-Dichlorophenoxyacetic acid} 3545 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| 2,4-DB :- {4-(2,4-dichlorophenoxy)butyric acid} 3791 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| 2-Phenoxypropionic acid :- {PPA} 6673 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| 4-Chloro-2-methylphenol :- {p-Chloro-o-cresol} 3341 | River water | 4 | Sep 2025 – Dec 2025 | below 0.05 µg/l 12 Dec 2025 |
| 4-Chlorophenoxyacetic acid 3547 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| 4-Nonylphenol Branched 9190 | River water | 3 | Sep 2025 – Dec 2025 | below 0.04 µg/l 12 Dec 2025 |
| 4-Phenoxybutyric acid :- {PBA} 6672 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| 4-tert-Octylphenol :- {p-tert-Octylphenol} 9267 | River water | 3 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Aldicarb 9344 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Aldicarb sulfoxide 8806 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Aldoxycarb :- {Aldicarb Sulfone} 8807 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 28 | Jan 2024 – Mar 2026 | 250 mg/l 2 Mar 2026 |
| Aluminium, Dissolved 6037 | River water | 4 | Sep 2025 – Dec 2025 | below 20 µg/l 12 Dec 2025 |
| Aminomethylphosphonic acid 7125 | River water | 4 | Sep 2025 – Dec 2025 | 0.13 µg/l 12 Dec 2025 |
| Ammonia un-ionised as N 0119 | River water | 28 | Jan 2024 – Mar 2026 | below 0.00055 mg/l 2 Mar 2026 |
| Asulam 3004 | River water | 4 | Sep 2025 – Dec 2025 | below 0.02 µg/l 12 Dec 2025 |
| Azoxystrobin 5050 | River water | 4 | Sep 2025 – Dec 2025 | below 0.02 µg/l 12 Dec 2025 |
| Barium, Dissolved 9446 | River water | 4 | Sep 2025 – Dec 2025 | 35 µg/l 12 Dec 2025 |
| Benazolin 3792 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Bentazone 4065 | River water | 4 | Sep 2025 – Dec 2025 | 0.018 µg/l 12 Dec 2025 |
| Benzo(a)Pyrene 6399 | River water | 3 | Sep 2025 – Dec 2025 | 0.0032 µg/l 12 Dec 2025 |
| Benzo(b)Fluoranthene 0731 | River water | 3 | Sep 2025 – Dec 2025 | 0.0027 µg/l 12 Dec 2025 |
| Benzo(g,h,i)Perylene 0714 | River water | 3 | Sep 2025 – Dec 2025 | 0.0038 µg/l 12 Dec 2025 |
| Benzo(k)Fluoranthene 0733 | River water | 3 | Sep 2025 – Dec 2025 | 0.0014 µg/l 12 Dec 2025 |
| Boron, Dissolved 9447 | River water | 4 | Sep 2025 – Dec 2025 | below 100 µg/l 12 Dec 2025 |
| Bromoxynil 6449 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Cadmium, Dissolved 0106 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Calcium, Dissolved 0239 | River water | 4 | Sep 2025 – Dec 2025 | 120 mg/l 12 Dec 2025 |
| Carbaryl 9343 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Carbendazim 3475 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Carbetamide 9073 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Carbofuran 3086 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 24 | Jan 2024 – Dec 2025 | 6.9 mg/l 12 Dec 2025 |
| Chloridazon 6760 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Chloride 0172 | River water | 23 | Jan 2024 – Dec 2025 | 40 mg/l 12 Dec 2025 |
| Chlorotoluron 9348 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Chloroxuron 3399 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Chromium, Dissolved 3409 | River water | 4 | Sep 2025 – Dec 2025 | below 0.5 µg/l 12 Dec 2025 |
| cis-Permethrin 9341 | River water | 2 | Sep 2025 – Nov 2025 | below 0.0001 µg/l 28 Nov 2025 |
| Clopyralid 6620 | River water | 4 | Sep 2025 – Dec 2025 | 0.01 µg/l 12 Dec 2025 |
| Copper : BLM Bioavailable 4821 | River water | 3 | Sep 2025 – Dec 2025 | 0.07 µg/l 12 Dec 2025 |
| Copper, Dissolved 6450 | River water | 4 | Sep 2025 – Dec 2025 | 1.6 µg/l 12 Dec 2025 |
| Cypermethrin 0073 | River water | 3 | Sep 2025 – Dec 2025 | below 0.00002 µg/l 12 Dec 2025 |
| Cypermethrin Identification 5446 | River water | 3 | Sep 2025 – Dec 2025 | 1 text result 12 Dec 2025 |
| Di(2-ethylhexyl) phthalate :- {DEHP} 6724 | River water | 4 | Sep 2025 – Dec 2025 | below 0.2 µg/l 12 Dec 2025 |
| Dicamba 3550 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Dichlorprop :- {2,4-DP} 3551 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Diflurobenzuron 9345 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Diuron 3811 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Ethiofencarb 6955 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Ethirimol 5047 | River water | 4 | Sep 2025 – Dec 2025 | below 0.05 µg/l 12 Dec 2025 |
| Fenoprop 3552 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Fenuron 9339 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Flow Type 2896 | River water | 15 | Jul 2024 – Dec 2025 | High Flow 12 Dec 2025 |
| Fluoranthene 0736 | River water | 3 | Sep 2025 – Dec 2025 | 0.0051 µg/l 12 Dec 2025 |
| Fluroxypyr 4064 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| GCMS Screen : Target Based multi-residue screening : Semi Quantitative 4994 | River water | 4 | Sep 2025 – Dec 2025 | 1 text result 12 Dec 2025 |
| Glyphosate 3007 | River water | 4 | Sep 2025 – Dec 2025 | below 0.1 µg/l 12 Dec 2025 |
| Hardness, Calcium 0163 | River water | 4 | Sep 2025 – Dec 2025 | 300 mg/l 12 Dec 2025 |
| Hardness, Total as CaCO3 0158 | River water | 4 | Sep 2025 – Dec 2025 | 315 mg/l 12 Dec 2025 |
| Imazapyr 7025 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Indeno(1,2,3-cd)pyrene 0746 | River water | 4 | Sep 2025 – Dec 2025 | 0.0036 µg/l 12 Dec 2025 |
| Ioxynil 9068 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Iron, Dissolved 6460 | River water | 4 | Sep 2025 – Dec 2025 | 32 µg/l 12 Dec 2025 |
| Isoproturon 3117 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Lead : BLM Bioavailable 3377 | River water | 3 | Sep 2025 – Dec 2025 | 0.01 µg/l 12 Dec 2025 |
| Lead, Dissolved 0052 | River water | 4 | Sep 2025 – Dec 2025 | below 0.1 µg/l 12 Dec 2025 |
| Linuron 3118 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Lithium, Dissolved 4201 | River water | 4 | Sep 2025 – Dec 2025 | below 100 µg/l 12 Dec 2025 |
| Magnesium, Dissolved 0235 | River water | 4 | Sep 2025 – Dec 2025 | 3.8 mg/l 12 Dec 2025 |
| Manganese : BLM Bioavailable 4820 | River water | 3 | Sep 2025 – Dec 2025 | 2.8 µg/l 12 Dec 2025 |
| Manganese, Dissolved 6458 | River water | 4 | Sep 2025 – Dec 2025 | below 10 µg/l 12 Dec 2025 |
| MCPA :- {4-Chloro-2-methylphenoxyacetic acid} 3548 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| MCPB :- {4-Chloro-2-methylphenoxybutyric acid} 3790 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Mecoprop 3549 | River water | 4 | Sep 2025 – Dec 2025 | 0.0078 µg/l 12 Dec 2025 |
| Methabenzthiazuron 7053 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Methiocarb 6971 | River water | 4 | Sep 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| Methomyl 6972 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Metoxuron 3130 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Metsulfuron-methyl 9861 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Monolinuron 3925 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Monuron 3400 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Neburon 9756 | River water | 4 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Nickel : BLM Bioavailable 3878 | River water | 3 | Sep 2025 – Dec 2025 | 0.37 µg/l 12 Dec 2025 |
| Nickel, Dissolved 3410 | River water | 4 | Sep 2025 – Dec 2025 | 1.2 µg/l 12 Dec 2025 |
| Nitrite as N 0118 | River water | 28 | Jan 2024 – Mar 2026 | 0.011 mg/l 2 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 28 | Jan 2024 – Mar 2026 | 6.2 mg/l 2 Mar 2026 |
| Oxamyl 6980 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Perfluorooctanoate anion 9274 | River water | 4 | Sep 2025 – Dec 2025 | 0.00066 µg/l 12 Dec 2025 |
| Perfluorooctylsulphonate anion 9276 | River water | 4 | Sep 2025 – Dec 2025 | 0.00063 µg/l 12 Dec 2025 |
| Phenoxyacetic acid :- {PAA} 6671 | River water | 4 | Sep 2025 – Dec 2025 | 0.019 µg/l 12 Dec 2025 |
| Phosphorus, Total as P 0348 | River water | 24 | Jan 2024 – Dec 2025 | 0.13 mg/l 12 Dec 2025 |
| Picloram 9883 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Potassium, Dissolved 0209 | River water | 4 | Sep 2025 – Dec 2025 | 4.2 mg/l 12 Dec 2025 |
| Propoxur 6987 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Silica, reactive as SiO2 0182 | River water | 24 | Jan 2024 – Dec 2025 | 12 mg/l 12 Dec 2025 |
| Sodium, Dissolved 0205 | River water | 4 | Sep 2025 – Dec 2025 | 20 mg/l 12 Dec 2025 |
| Solids, Suspended at 105 C 0135 | River water | 1 | Dec 2025 – Dec 2025 | 15 mg/l 12 Dec 2025 |
| Strontium, Filtered 6693 | River water | 4 | Sep 2025 – Dec 2025 | 330 µg/l 12 Dec 2025 |
| Sulcotrione 5042 | River water | 4 | Sep 2025 – Dec 2025 | below 0.1 µg/l 12 Dec 2025 |
| Sulphate, Dissolved as SO4 7859 | River water | 4 | Sep 2025 – Dec 2025 | 59 mg/l 12 Dec 2025 |
| trans-Permethrin 9342 | River water | 3 | Sep 2025 – Dec 2025 | below 0.0001 µg/l 12 Dec 2025 |
| Tributyl Tin as Cation 8944 | River water | 4 | Sep 2025 – Dec 2025 | below 0.00002 µg/l 12 Dec 2025 |
| Triclopyr 3555 | River water | 4 | Sep 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Triclosan 5889 | River water | 3 | Sep 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| Triphenyl Tin as Cation 5732 | River water | 4 | Sep 2025 – Dec 2025 | below 0.00002 µg/l 12 Dec 2025 |
| Zinc : BLM Bioavailable 4822 | River water | 3 | Sep 2025 – Dec 2025 | 0.42 µg/l 12 Dec 2025 |
| Zinc, Dissolved 3408 | River water | 4 | Sep 2025 – Dec 2025 | 1.4 µg/l 12 Dec 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.