River Arun downstream of Horsham Bypass A24
EA name: R ARUN D/S HORSHAM BYPASS A24 (also listed as “RIVER ARUN AT FOOTBRIDGE DOWNSTREAM OF HORSHAM BYPASS (A24)”)
Environment Agency sampling point SO-F0002804 · 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, 13:5227 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 35 since 15 Nov 2023 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 515056, 129987As published, to the nearest 1 m. Open in a map
- River, by its own name
- Arun
- River, by the map
- River ArunPlaced on the river its name gives, 0 m from the line.
- Next gauge downstream
- Alfoldean On the River Arun · 7.8 km along the river
- Nearest gauge upstream
- Tanbridge On the River Arun · 2.5 km along the river
- Why it was sampled
- Monitoring (national agency policy) (25 samples)
Environmental monitoring statutory (EU directives) (10 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
59.5%
Sampled 4 Sep 2026, 27 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:52 | 59.5 | 59.5% |
| 6 Aug 2026, 11:16 | 58.4 | 58.4% |
| 2 Jul 2026, 12:55 | 67.3 | 67.3% |
| 3 Jun 2026, 10:06 | 90.6 | 90.6% |
| 13 May 2026, 12:59 | 73.4 | 73.4% |
| 17 Apr 2026, 13:17 | 97.6 | 97.6% |
| 13 Mar 2026, 10:14 | 84 | 84% |
| 19 Feb 2026, 10:48 | 97.2 | 97.2% |
| 30 Jan 2026, 11:17 | 100.2 | 100.2% |
| 9 Dec 2025, 12:57 | 96.4 | 96.4% |
| 13 Nov 2025, 11:08 | 90.1 | 90.1% |
| 27 Oct 2025, 12:43 | 86.9 | 86.9% |
| 29 Sep 2025, 10:26 | 72 | 72% |
| 12 Aug 2025, 11:34 | 69.3 | 69.3% |
| 22 Jul 2025, 12:20 | 72.4 | 72.4% |
| 27 Jun 2025, 12:30 | 85.8 | 85.8% |
| 21 May 2025, 13:21 | 73.4 | 73.4% |
| 16 Apr 2025, 12:53 | 97 | 97% |
| 10 Mar 2025, 13:17 | 106.4 | 106.4% |
| 10 Feb 2025, 12:05 | 98.8 | 98.8% |
| 14 Jan 2025, 11:52 | 98.6 | 98.6% |
| 16 Dec 2024, 11:58 | 96.2 | 96.2% |
| 19 Nov 2024, 12:46 | 93 | 93% |
| 25 Oct 2024, 12:00 | 93 | 93% |
| 9 Sep 2024, 13:57 | 89.1 | 89.1% |
| 22 Aug 2024, 12:00 | 68.7 | 68.7% |
| 13 Aug 2024, 12:54 | 64 | 64% |
| 12 Aug 2024, 12:16 | 65.2 | 65.2% |
| 30 Jul 2024, 09:37 | 36.1 | 36.1% |
| 30 Jul 2024, 09:28 | 36.1 | 36.1% |
| 28 Jun 2024, 12:46 | 67.7 | 67.7% |
| 28 Jun 2024, 12:34 | 67.7 | 67.7% |
| 5 Mar 2024, 12:13 | 98.2 | 98.2% |
| 24 Jan 2024, 10:06 | 97 | 97% |
| 15 Nov 2023, 12:32 | 95.3 | 95.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
5.55 mg/l
Sampled 4 Sep 2026, 27 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:52 | 5.55 | 5.55 mg/l |
| 6 Aug 2026, 11:16 | 5.59 | 5.59 mg/l |
| 2 Jul 2026, 12:55 | 6.17 | 6.17 mg/l |
| 3 Jun 2026, 10:06 | 9.11 | 9.11 mg/l |
| 13 May 2026, 12:59 | 7.93 | 7.93 mg/l |
| 17 Apr 2026, 13:17 | 10.2 | 10.2 mg/l |
| 13 Mar 2026, 10:14 | 9.67 | 9.67 mg/l |
| 19 Feb 2026, 10:48 | 11.9 | 11.9 mg/l |
| 30 Jan 2026, 11:17 | 12.1 | 12.1 mg/l |
| 9 Dec 2025, 12:57 | 10.7 | 10.7 mg/l |
| 13 Nov 2025, 11:08 | 9.6 | 9.6 mg/l |
| 27 Oct 2025, 12:43 | 9.72 | 9.72 mg/l |
| 29 Sep 2025, 10:26 | 7.88 | 7.88 mg/l |
| 12 Aug 2025, 11:34 | 6.54 | 6.54 mg/l |
| 22 Jul 2025, 12:20 | 6.76 | 6.76 mg/l |
| 27 Jun 2025, 12:30 | 8 | 8 mg/l |
| 21 May 2025, 13:21 | 7.49 | 7.49 mg/l |
| 16 Apr 2025, 12:53 | 10.4 | 10.4 mg/l |
| 10 Mar 2025, 13:17 | 11.9 | 11.9 mg/l |
| 10 Feb 2025, 12:05 | 12.6 | 12.6 mg/l |
| 14 Jan 2025, 11:52 | 12.8 | 12.8 mg/l |
| 16 Dec 2024, 11:58 | 11.2 | 11.2 mg/l |
| 19 Nov 2024, 12:46 | 10.8 | 10.8 mg/l |
| 25 Oct 2024, 12:00 | 9.95 | 9.95 mg/l |
| 9 Sep 2024, 13:57 | 8.79 | 8.79 mg/l |
| 22 Aug 2024, 12:00 | 6.78 | 6.78 mg/l |
| 13 Aug 2024, 12:54 | 5.8 | 5.8 mg/l |
| 12 Aug 2024, 12:16 | 5.9 | 5.9 mg/l |
| 30 Jul 2024, 09:37 | 3.49 | 3.49 mg/l |
| 30 Jul 2024, 09:28 | 3.49 | 3.49 mg/l |
| 28 Jun 2024, 12:46 | 6.66 | 6.66 mg/l |
| 28 Jun 2024, 12:34 | 6.66 | 6.66 mg/l |
| 5 Mar 2024, 12:13 | 11.7 | 11.7 mg/l |
| 24 Jan 2024, 10:06 | 11.5 | 11.5 mg/l |
| 15 Nov 2023, 12:32 | 10.7 | 10.7 mg/l |
Water temperature
code 0076 · °C
18.6 °C
Sampled 4 Sep 2026, 27 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:52 | 18.6 | 18.6 °C |
| 6 Aug 2026, 11:16 | 17.3 | 17.3 °C |
| 2 Jul 2026, 12:55 | 19.5 | 19.5 °C |
| 3 Jun 2026, 10:06 | 15 | 15 °C |
| 13 May 2026, 12:59 | 11.8 | 11.8 °C |
| 17 Apr 2026, 13:17 | 13.2 | 13.2 °C |
| 13 Mar 2026, 10:14 | 9.1 | 9.1 °C |
| 19 Feb 2026, 10:48 | 6.7 | 6.7 °C |
| 30 Jan 2026, 11:17 | 7.1 | 7.1 °C |
| 9 Dec 2025, 12:57 | 10.6 | 10.6 °C |
| 13 Nov 2025, 11:08 | 12.4 | 12.4 °C |
| 27 Oct 2025, 12:43 | 10.3 | 10.3 °C |
| 29 Sep 2025, 10:26 | 11.2 | 11.2 °C |
| 12 Aug 2025, 11:34 | 18 | 18 °C |
| 22 Jul 2025, 12:20 | 18.5 | 18.5 °C |
| 27 Jun 2025, 12:30 | 18.6 | 18.6 °C |
| 21 May 2025, 13:21 | 14.3 | 14.3 °C |
| 16 Apr 2025, 12:53 | 11.9 | 11.9 °C |
| 10 Mar 2025, 13:17 | 10.4 | 10.4 °C |
| 10 Feb 2025, 12:05 | 5.1 | 5.1 °C |
| 14 Jan 2025, 11:52 | 4.4 | 4.4 °C |
| 16 Dec 2024, 11:58 | 8.7 | 8.7 °C |
| 19 Nov 2024, 12:46 | 8.9 | 8.9 °C |
| 25 Oct 2024, 12:00 | 12.2 | 12.2 °C |
| 9 Sep 2024, 13:57 | 15.9 | 15.9 °C |
| 22 Aug 2024, 12:00 | 15.9 | 15.9 °C |
| 13 Aug 2024, 12:54 | 20 | 20 °C |
| 12 Aug 2024, 12:16 | 20.1 | 20.1 °C |
| 30 Jul 2024, 09:37 | 16.9 | 16.9 °C |
| 30 Jul 2024, 09:28 | 16.9 | 16.9 °C |
| 28 Jun 2024, 12:46 | 16 | 16 °C |
| 28 Jun 2024, 12:34 | 16 | 16 °C |
| 5 Mar 2024, 12:13 | 7.6 | 7.6 °C |
| 24 Jan 2024, 10:06 | 7.8 | 7.8 °C |
| 15 Nov 2023, 12:32 | 10 | 10 °C |
pH
code 0061
7.46
Sampled 4 Sep 2026, 27 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:52 | 7.46 | 7.46 |
| 6 Aug 2026, 11:16 | 7.56 | 7.56 |
| 2 Jul 2026, 12:55 | 7.71 | 7.71 |
| 3 Jun 2026, 10:06 | 7.94 | 7.94 |
| 13 May 2026, 12:59 | 7.44 | 7.44 |
| 17 Apr 2026, 13:17 | 7.68 | 7.68 |
| 13 Mar 2026, 10:14 | 7.77 | 7.77 |
| 19 Feb 2026, 10:48 | 7.63 | 7.63 |
| 30 Jan 2026, 11:17 | 7.46 | 7.46 |
| 9 Dec 2025, 12:57 | 7.5 | 7.5 |
| 13 Nov 2025, 11:08 | 7.52 | 7.52 |
| 27 Oct 2025, 12:43 | 7.47 | 7.47 |
| 29 Sep 2025, 10:26 | 7.93 | 7.93 |
| 12 Aug 2025, 11:34 | 7.55 | 7.55 |
| 22 Jul 2025, 12:20 | 7.58 | 7.58 |
| 27 Jun 2025, 12:30 | 7.46 | 7.46 |
| 21 May 2025, 13:21 | 7.58 | 7.58 |
| 16 Apr 2025, 12:53 | 7.77 | 7.77 |
| 10 Mar 2025, 13:17 | 7.73 | 7.73 |
| 10 Feb 2025, 12:05 | 7.75 | 7.75 |
| 14 Jan 2025, 11:52 | 7.63 | 7.63 |
| 16 Dec 2024, 11:58 | 7.56 | 7.56 |
| 19 Nov 2024, 12:46 | 7.73 | 7.73 |
| 25 Oct 2024, 12:00 | 7.59 | 7.59 |
| 9 Sep 2024, 13:57 | 7.62 | 7.62 |
| 22 Aug 2024, 12:00 | 7.63 | 7.63 |
| 13 Aug 2024, 12:54 | 7.91 | 7.91 |
| 12 Aug 2024, 12:16 | 7.93 | 7.93 |
| 30 Jul 2024, 09:37 | 7.4 | 7.4 |
| 30 Jul 2024, 09:28 | 7.4 | 7.4 |
| 28 Jun 2024, 12:46 | 7.77 | 7.77 |
| 28 Jun 2024, 12:34 | 7.77 | 7.77 |
| 5 Mar 2024, 12:13 | 7.4 | 7.4 |
| 24 Jan 2024, 10:06 | 7.71 | 7.71 |
| 15 Nov 2023, 12:32 | 7.46 | 7.46 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.059 mg/l
Sampled 4 Sep 2026, 27 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:52 | 0.059 | 0.059 mg/l |
| 6 Aug 2026, 11:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jul 2026, 12:55 | 0.058 | 0.058 mg/l |
| 3 Jun 2026, 10:06 | 0.084 | 0.084 mg/l |
| 13 May 2026, 12:59 | 0.058 | 0.058 mg/l |
| 17 Apr 2026, 13:17 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Mar 2026, 10:14 | 0.083 | 0.083 mg/l |
| 19 Feb 2026, 10:48 | 0.054 | 0.054 mg/l |
| 30 Jan 2026, 11:17 | 0.055 | 0.055 mg/l |
| 9 Dec 2025, 12:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Nov 2025, 11:08 | 0.058 | 0.058 mg/l |
| 27 Oct 2025, 12:43 | 0.039 | 0.039 mg/l |
| 29 Sep 2025, 10:26 | 0.04 | 0.04 mg/l |
| 12 Aug 2025, 11:34 | 0.058 | 0.058 mg/l |
| 22 Jul 2025, 12:20 | 0.063 | 0.063 mg/l |
| 27 Jun 2025, 12:30 | 0.046 | 0.046 mg/l |
| 21 May 2025, 13:21 | 0.14 | 0.14 mg/l |
| 16 Apr 2025, 12:53 | 0.033 | 0.033 mg/l |
| 10 Mar 2025, 13:17 | 0.033 | 0.033 mg/l |
| 10 Feb 2025, 12:05 | 0.21 | 0.21 mg/l |
| 14 Jan 2025, 11:52 | 0.06 | 0.06 mg/l |
| 16 Dec 2024, 11:58 | 0.035 | 0.035 mg/l |
| 19 Nov 2024, 12:46 | 0.067 | 0.067 mg/l |
| 25 Oct 2024, 12:00 | 0.031 | 0.031 mg/l |
| 9 Sep 2024, 13:57 | 0.21 | 0.21 mg/l |
| 22 Aug 2024, 12:00 | 0.033 | 0.033 mg/l |
| 13 Aug 2024, 12:54 | 0.062 | 0.062 mg/l |
| 12 Aug 2024, 12:16 | 0.059 | 0.059 mg/l |
| 30 Jul 2024, 09:37 | 2 | 2 mg/l |
| 30 Jul 2024, 09:28 | 1.9 | 1.9 mg/l |
| 28 Jun 2024, 12:46 | 0.18 | 0.18 mg/l |
| 28 Jun 2024, 12:34 | 0.18 | 0.18 mg/l |
| 5 Mar 2024, 12:13 | 0.037 | 0.037 mg/l |
| 24 Jan 2024, 10:06 | 0.057 | 0.057 mg/l |
| 15 Nov 2023, 12:32 | 0.048 | 0.048 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.486 mg/l
Sampled 4 Sep 2026, 27 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:52 | 0.486 | 0.486 mg/l |
| 6 Aug 2026, 11:16 | 0.626 | 0.626 mg/l |
| 2 Jul 2026, 12:55 | 0.436 | 0.436 mg/l |
| 3 Jun 2026, 10:06 | 0.933 | 0.933 mg/l |
| 13 May 2026, 12:59 | 0.66 | 0.66 mg/l |
| 17 Apr 2026, 13:17 | 0.881 | 0.881 mg/l |
| 13 Mar 2026, 10:14 | 1.68 | 1.68 mg/l |
| 19 Feb 2026, 10:48 | 1.59 | 1.59 mg/l |
| 30 Jan 2026, 11:17 | 1.99 | 1.99 mg/l |
| 9 Dec 2025, 12:57 | 2.29 | 2.29 mg/l |
| 13 Nov 2025, 11:08 | 3.37 | 3.37 mg/l |
| 27 Oct 2025, 12:43 | 4.65 | 4.65 mg/l |
| 29 Sep 2025, 10:26 | 0.57 | 0.57 mg/l |
| 12 Aug 2025, 11:34 | 0.667 | 0.667 mg/l |
| 22 Jul 2025, 12:20 | 0.675 | 0.675 mg/l |
| 27 Jun 2025, 12:30 | 0.557 | 0.557 mg/l |
| 21 May 2025, 13:21 | 0.781 | 0.781 mg/l |
| 16 Apr 2025, 12:53 | 1.18 | 1.18 mg/l |
| 10 Mar 2025, 13:17 | 2.59 | 2.59 mg/l |
| 10 Feb 2025, 12:05 | 2.38 | 2.38 mg/l |
| 14 Jan 2025, 11:52 | 3.09 | 3.09 mg/l |
| 16 Dec 2024, 11:58 | 2.79 | 2.79 mg/l |
| 19 Nov 2024, 12:46 | 1.78 | 1.78 mg/l |
| 25 Oct 2024, 12:00 | 2.38 | 2.38 mg/l |
| 9 Sep 2024, 13:57 | 2.51 | 2.51 mg/l |
| 22 Aug 2024, 12:00 | 0.522 | 0.522 mg/l |
| 13 Aug 2024, 12:54 | 0.617 | 0.617 mg/l |
| 12 Aug 2024, 12:16 | 0.687 | 0.687 mg/l |
| 30 Jul 2024, 09:37 | 0.83 | 0.83 mg/l |
| 30 Jul 2024, 09:28 | 0.811 | 0.811 mg/l |
| 28 Jun 2024, 12:46 | 0.951 | 0.951 mg/l |
| 28 Jun 2024, 12:34 | 0.901 | 0.901 mg/l |
| 5 Mar 2024, 12:13 | 2.19 | 2.19 mg/l |
| 15 Nov 2023, 12:32 | 2.28 | 2.28 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.15 mg/l
Sampled 4 Sep 2026, 27 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:52 | 0.15 | 0.15 mg/l |
| 6 Aug 2026, 11:16 | 0.14 | 0.14 mg/l |
| 2 Jul 2026, 12:55 | 0.27 | 0.27 mg/l |
| 3 Jun 2026, 10:06 | 0.11 | 0.11 mg/l |
| 13 May 2026, 12:59 | 0.068 | 0.068 mg/l |
| 17 Apr 2026, 13:17 | 0.041 | 0.041 mg/l |
| 13 Mar 2026, 10:14 | 0.048 | 0.048 mg/l |
| 19 Feb 2026, 10:48 | 0.052 | 0.052 mg/l |
| 30 Jan 2026, 11:17 | 0.052 | 0.052 mg/l |
| 9 Dec 2025, 12:57 | 0.063 | 0.063 mg/l |
| 13 Nov 2025, 11:08 | 0.065 | 0.065 mg/l |
| 27 Oct 2025, 12:43 | 0.064 | 0.064 mg/l |
| 29 Sep 2025, 10:26 | 0.089 | 0.089 mg/l |
| 12 Aug 2025, 11:34 | 0.11 | 0.11 mg/l |
| 22 Jul 2025, 12:20 | 0.19 | 0.19 mg/l |
| 27 Jun 2025, 12:30 | 0.11 | 0.11 mg/l |
| 21 May 2025, 13:21 | 0.1 | 0.1 mg/l |
| 16 Apr 2025, 12:53 | 0.037 | 0.037 mg/l |
| 10 Mar 2025, 13:17 | 0.026 | 0.026 mg/l |
| 10 Feb 2025, 12:05 | 0.052 | 0.052 mg/l |
| 14 Jan 2025, 11:52 | 0.038 | 0.038 mg/l |
| 16 Dec 2024, 11:58 | 0.053 | 0.053 mg/l |
| 19 Nov 2024, 12:46 | 0.093 | 0.093 mg/l |
| 25 Oct 2024, 12:00 | 0.061 | 0.061 mg/l |
| 9 Sep 2024, 13:57 | 0.1 | 0.1 mg/l |
| 22 Aug 2024, 12:00 | 0.11 | 0.11 mg/l |
| 13 Aug 2024, 12:54 | 0.1 | 0.1 mg/l |
| 12 Aug 2024, 12:16 | 0.12 | 0.12 mg/l |
| 30 Jul 2024, 09:37 | 0.17 | 0.17 mg/l |
| 30 Jul 2024, 09:28 | 0.18 | 0.18 mg/l |
| 28 Jun 2024, 12:46 | 0.1 | 0.1 mg/l |
| 28 Jun 2024, 12:34 | 0.093 | 0.093 mg/l |
| 5 Mar 2024, 12:13 | 0.044 | 0.044 mg/l |
| 24 Jan 2024, 10:06 | 0.037 | 0.037 mg/l |
| 15 Nov 2023, 12:32 | 0.043 | 0.043 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
385 µS/cm
Sampled 4 Sep 2026, 27 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:52 | 385 | 385 µS/cm |
| 6 Aug 2026, 11:16 | 425 | 425 µS/cm |
| 2 Jul 2026, 12:55 | 575 | 575 µS/cm |
| 3 Jun 2026, 10:06 | 344 | 344 µS/cm |
| 13 May 2026, 12:59 | 379 | 379 µS/cm |
| 17 Apr 2026, 13:17 | 385 | 385 µS/cm |
| 13 Mar 2026, 10:14 | 296 | 296 µS/cm |
| 19 Feb 2026, 10:48 | 266 | 266 µS/cm |
| 30 Jan 2026, 11:17 | 247 | 247 µS/cm |
| 9 Dec 2025, 12:57 | 258 | 258 µS/cm |
| 13 Nov 2025, 11:08 | 351 | 351 µS/cm |
| 27 Oct 2025, 12:43 | 380 | 380 µS/cm |
| 29 Sep 2025, 10:26 | 660 | 660 µS/cm |
| 12 Aug 2025, 11:34 | 357 | 357 µS/cm |
| 22 Jul 2025, 12:20 | 318 | 318 µS/cm |
| 27 Jun 2025, 12:30 | 438 | 438 µS/cm |
| 21 May 2025, 13:21 | 411 | 411 µS/cm |
| 16 Apr 2025, 12:53 | 383 | 383 µS/cm |
| 10 Mar 2025, 13:17 | 297 | 297 µS/cm |
| 10 Feb 2025, 12:05 | 400 | 400 µS/cm |
| 14 Jan 2025, 11:52 | 307 | 307 µS/cm |
| 16 Dec 2024, 11:58 | 286 | 286 µS/cm |
| 19 Nov 2024, 12:46 | 322 | 322 µS/cm |
| 25 Oct 2024, 12:00 | 288 | 288 µS/cm |
| 9 Sep 2024, 13:57 | 359 | 359 µS/cm |
| 22 Aug 2024, 12:00 | 421 | 421 µS/cm |
| 13 Aug 2024, 12:54 | 433 | 433 µS/cm |
| 12 Aug 2024, 12:16 | 525 | 525 µS/cm |
| 30 Jul 2024, 09:37 | 520 | 520 µS/cm |
| 30 Jul 2024, 09:28 | 520 | 520 µS/cm |
| 28 Jun 2024, 12:46 | 605 | 605 µS/cm |
| 28 Jun 2024, 12:34 | 605 | 605 µS/cm |
| 5 Mar 2024, 12:13 | 275 | 275 µS/cm |
| 24 Jan 2024, 10:06 | 340 | 340 µS/cm |
| 15 Nov 2023, 12:32 | 250 | 250 µS/cm |
Everything measured here
77 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 77 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 35 | Nov 2023 – Sep 2026 | 59.5% 4 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 35 | Nov 2023 – Sep 2026 | 5.55 mg/l 4 Sep 2026 |
| Temperature of Water 0076 | River water | 35 | Nov 2023 – Sep 2026 | 18.6 °C 4 Sep 2026 |
| pH 0061 | River water | 35 | Nov 2023 – Sep 2026 | 7.46 4 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 35 | Nov 2023 – Sep 2026 | 0.059 mg/l 4 Sep 2026 |
| Nitrate as N 0117 | River water | 34 | Nov 2023 – Sep 2026 | 0.486 mg/l 4 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 35 | Nov 2023 – Sep 2026 | 0.15 mg/l 4 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 35 | Nov 2023 – Sep 2026 | 385 µS/cm 4 Sep 2026 |
| (Perfluorohexanesulfonyl)[3-(trimethylazaniumyl)propyl]azanide 2890 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| 10:2 Fluorotelomer sulfonic acid 2994 | River water | 1 | Feb 2026 – Feb 2026 | below 0.002 µg/l 19 Feb 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Aug 2025 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Aug 2025 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Aug 2025 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Aug 2025 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| 2H-Perfluoro-2-decenoic acid 2888 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Aug 2025 – Feb 2026 | below 0.004 µg/l 19 Feb 2026 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Aug 2025 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| 5:1:2 Fluorotelomer betaine 2887 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| 5:3 Fluorotelomer betaine 2886 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| 6:2 Fluorotelomer phosphate diester 2986 | River water | 1 | Feb 2026 – Feb 2026 | below 0.004 µg/l 19 Feb 2026 |
| 6:2 Fluorotelomer sulfonamide amine oxide (6:2 FTNO) (Capstone A) 2841 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| 6:2 Fluorotelomer sulfonamide betaine 2985 | River water | 1 | Feb 2026 – Feb 2026 | 0.0038 µg/l 19 Feb 2026 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Aug 2025 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| 6:2/8:2 Fluorotelomer phosphate diester 2884 | River water | 1 | Feb 2026 – Feb 2026 | below 0.01 µg/l 19 Feb 2026 |
| 6:6 Perfluorophosphinic acid 2883 | River water | 1 | Feb 2026 – Feb 2026 | below 0.004 µg/l 19 Feb 2026 |
| 6:8 Perfluorophosphinic acid 2882 | River water | 1 | Feb 2026 – Feb 2026 | below 0.01 µg/l 19 Feb 2026 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Aug 2025 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| 8:8 Perfluorophosphinic acid 2879 | River water | 1 | Feb 2026 – Feb 2026 | below 0.01 µg/l 19 Feb 2026 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 35 | Nov 2023 – Sep 2026 | 120 mg/l 4 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 35 | Nov 2023 – Sep 2026 | 0.00059 mg/l 4 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 32 | Jun 2024 – Sep 2026 | below 4 mg/l 4 Sep 2026 |
| Chloride 0172 | River water | 21 | Jun 2024 – Mar 2026 | 24 mg/l 13 Mar 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Aug 2025 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| Hexafluoropropylene oxide trimer acid 2980 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Aug 2025 – Feb 2026 | below 0.002 µg/l 19 Feb 2026 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Aug 2025 – Feb 2026 | below 0.002 µg/l 19 Feb 2026 |
| Nitrite as N 0118 | River water | 35 | Nov 2023 – Sep 2026 | 0.014 mg/l 4 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 34 | Nov 2023 – Sep 2026 | 0.5 mg/l 4 Sep 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Aug 2025 – Feb 2026 | 0.002 µg/l 19 Feb 2026 |
| Perfluorobutanoic acid 2995 | River water | 2 | Aug 2025 – Feb 2026 | 0.0022 µg/l 19 Feb 2026 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Aug 2025 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| Perfluorodecanoic acid 8892 | River water | 2 | Aug 2025 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Aug 2025 – Feb 2026 | below 0.005 µg/l 19 Feb 2026 |
| Perfluorododecanoic acid 8894 | River water | 2 | Aug 2025 – Feb 2026 | below 0.002 µg/l 19 Feb 2026 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Aug 2025 – Feb 2026 | 0.0016 µg/l 19 Feb 2026 |
| Perfluorohexane sulfonamido amine 2874 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Aug 2025 – Feb 2026 | 0.00065 µg/l 19 Feb 2026 |
| Perfluorohexanoic acid 8888 | River water | 2 | Aug 2025 – Feb 2026 | 0.0032 µg/l 19 Feb 2026 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| Perfluorononanoic acid 8891 | River water | 2 | Aug 2025 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Aug 2025 – Feb 2026 | below 0.002 µg/l 19 Feb 2026 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Aug 2025 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Aug 2025 – Feb 2026 | 0.0011 µg/l 19 Feb 2026 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Aug 2025 – Feb 2026 | 0.00095 µg/l 19 Feb 2026 |
| Perfluorooctanesulfonic acid (total) 2958 | River water | 1 | Feb 2026 – Feb 2026 | 0.0021 µg/l 19 Feb 2026 |
| Perfluorooctanoic acid 8890 | River water | 2 | Aug 2025 – Feb 2026 | 0.003 µg/l 19 Feb 2026 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Aug 2025 – Feb 2026 | below 0.0005 µg/l 19 Feb 2026 |
| Perfluoropentanoic acid 8887 | River water | 2 | Aug 2025 – Feb 2026 | 0.0032 µg/l 19 Feb 2026 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Aug 2025 – Feb 2026 | below 0.006 µg/l 19 Feb 2026 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Aug 2025 – Feb 2026 | below 0.002 µg/l 19 Feb 2026 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Aug 2025 – Feb 2026 | below 0.004 µg/l 19 Feb 2026 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Aug 2025 – Feb 2026 | below 0.001 µg/l 19 Feb 2026 |
| Silica, reactive as SiO2 0182 | River water | 22 | Jun 2024 – Mar 2026 | 6.3 mg/l 13 Mar 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.