Cholsey Brook 500 m below Cholsey sewage treatment works
EA name: CHOLSEY BROOK 500M BELOW CHOLSEY STW
Environment Agency sampling point TH-PTHR0016 · 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
- 9 Sep 2026, 08:3422 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 36 since 6 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 459590, 187386As published, to the nearest 1 m. Open in a map
- River, by its own name
- Cholsey Brook
- River, by the map
- Cholsey BrookPlaced on the river its name gives, 8 m from the line.
- Next gauge downstream
- Cleeve Lock On the River Thames · 7.4 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (36 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
89.1%
Sampled 9 Sep 2026, 22 days ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Sep 2026, 08:34 | 89.1 | 89.1% |
| 24 Aug 2026, 14:04 | 103.1 | 103.1% |
| 10 Jul 2026, 13:15 | 92.9 | 92.9% |
| 22 Jun 2026, 14:13 | 95.4 | 95.4% |
| 28 May 2026, 13:38 | 91.3 | 91.3% |
| 27 Apr 2026, 14:43 | 14.2 | 14.2% |
| 6 Mar 2026, 10:18 | 89.5 | 89.5% |
| 6 Feb 2026, 08:54 | 77.3 | 77.3% |
| 9 Jan 2026, 15:19 | 86.9 | 86.9% |
| 1 Dec 2025, 14:09 | 88.6 | 88.6% |
| 5 Nov 2025, 08:37 | 81.4 | 81.4% |
| 2 Oct 2025, 10:09 | 92.8 | 92.8% |
| 11 Sep 2025, 14:19 | 93.4 | 93.4% |
| 13 Aug 2025, 11:37 | 92.4 | 92.4% |
| 23 Jul 2025, 11:20 | 82.3 | 82.3% |
| 26 Jun 2025, 13:16 | 100 | 100% |
| 2 May 2025, 08:25 | 92.2 | 92.2% |
| 11 Apr 2025, 11:38 | 107.4 | 107.4% |
| 5 Mar 2025, 09:04 | 92.4 | 92.4% |
| 7 Feb 2025, 14:50 | 92.2 | 92.2% |
| 9 Jan 2025, 14:48 | 92.6 | 92.6% |
| 6 Dec 2024, 13:45 | 87.1 | 87.1% |
| 7 Nov 2024, 15:09 | 79.8 | 79.8% |
| 11 Oct 2024, 08:35 | 87.2 | 87.2% |
| 5 Sep 2024, 13:19 | 87.8 | 87.8% |
| 2 Aug 2024, 13:00 | 81.7 | 81.7% |
| 4 Jul 2024, 11:54 | 90.6 | 90.6% |
| 17 Jun 2024, 13:50 | 98.5 | 98.5% |
| 2 May 2024, 12:36 | 87.9 | 87.9% |
| 3 Apr 2024, 12:43 | 91 | 91% |
| 6 Mar 2024, 13:36 | 92.1 | 92.1% |
| 7 Feb 2024, 09:57 | 83.6 | 83.6% |
| 12 Jan 2024, 14:47 | 82.4 | 82.4% |
| 5 Dec 2023, 12:25 | 75.7 | 75.7% |
| 9 Nov 2023, 08:33 | 73.6 | 73.6% |
| 6 Oct 2023, 08:46 | 82 | 82% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.3 mg/l
Sampled 9 Sep 2026, 22 days ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Sep 2026, 08:34 | 9.3 | 9.3 mg/l |
| 24 Aug 2026, 14:04 | 9.76 | 9.76 mg/l |
| 10 Jul 2026, 13:15 | 7.97 | 7.97 mg/l |
| 22 Jun 2026, 14:13 | 8.37 | 8.37 mg/l |
| 28 May 2026, 13:38 | 8.38 | 8.38 mg/l |
| 27 Apr 2026, 14:43 | 1.45 | 1.45 mg/l |
| 6 Mar 2026, 10:18 | 10.2 | 10.2 mg/l |
| 6 Feb 2026, 08:54 | 8.88 | 8.88 mg/l |
| 9 Jan 2026, 15:19 | 10.7 | 10.7 mg/l |
| 1 Dec 2025, 14:09 | 9.96 | 9.96 mg/l |
| 5 Nov 2025, 08:37 | 8.54 | 8.54 mg/l |
| 2 Oct 2025, 10:09 | 9.6 | 9.6 mg/l |
| 11 Sep 2025, 14:19 | 9.33 | 9.33 mg/l |
| 13 Aug 2025, 11:37 | 8.35 | 8.35 mg/l |
| 23 Jul 2025, 11:20 | 7.87 | 7.87 mg/l |
| 26 Jun 2025, 13:16 | 9.27 | 9.27 mg/l |
| 2 May 2025, 08:25 | 9.5 | 9.5 mg/l |
| 11 Apr 2025, 11:38 | 11.7 | 11.7 mg/l |
| 5 Mar 2025, 09:04 | 11.5 | 11.5 mg/l |
| 7 Feb 2025, 14:50 | 11.2 | 11.2 mg/l |
| 9 Jan 2025, 14:48 | 11.4 | 11.4 mg/l |
| 6 Dec 2024, 13:45 | 10 | 10 mg/l |
| 7 Nov 2024, 15:09 | 8.58 | 8.58 mg/l |
| 11 Oct 2024, 08:35 | 9.89 | 9.89 mg/l |
| 5 Sep 2024, 13:19 | 8.74 | 8.74 mg/l |
| 2 Aug 2024, 13:00 | 7.59 | 7.59 mg/l |
| 4 Jul 2024, 11:54 | 9.13 | 9.13 mg/l |
| 17 Jun 2024, 13:50 | 9.91 | 9.91 mg/l |
| 2 May 2024, 12:36 | 9.37 | 9.37 mg/l |
| 3 Apr 2024, 12:43 | 9.92 | 9.92 mg/l |
| 6 Mar 2024, 13:36 | 10.5 | 10.5 mg/l |
| 7 Feb 2024, 09:57 | 9.69 | 9.69 mg/l |
| 12 Jan 2024, 14:47 | 9.77 | 9.77 mg/l |
| 5 Dec 2023, 12:25 | 8.8 | 8.8 mg/l |
| 9 Nov 2023, 08:33 | 8.37 | 8.37 mg/l |
| 6 Oct 2023, 08:46 | 8.58 | 8.58 mg/l |
Water temperature
code 0076 · °C
13.3 °C
Sampled 9 Sep 2026, 22 days ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Sep 2026, 08:34 | 13.3 | 13.3 °C |
| 24 Aug 2026, 14:04 | 17.9 | 17.9 °C |
| 10 Jul 2026, 13:15 | 22.9 | 22.9 °C |
| 22 Jun 2026, 14:13 | 21.7 | 21.7 °C |
| 28 May 2026, 13:38 | 19.4 | 19.4 °C |
| 27 Apr 2026, 14:43 | 14.3 | 14.3 °C |
| 6 Mar 2026, 10:18 | 9.6 | 9.6 °C |
| 6 Feb 2026, 08:54 | 9.2 | 9.2 °C |
| 9 Jan 2026, 15:19 | 6.2 | 6.2 °C |
| 1 Dec 2025, 14:09 | 10.1 | 10.1 °C |
| 5 Nov 2025, 08:37 | 13.1 | 13.1 °C |
| 2 Oct 2025, 10:09 | 13.7 | 13.7 °C |
| 11 Sep 2025, 14:19 | 15.3 | 15.3 °C |
| 13 Aug 2025, 11:37 | 20.2 | 20.2 °C |
| 23 Jul 2025, 11:20 | 17.4 | 17.4 °C |
| 26 Jun 2025, 13:16 | 18.9 | 18.9 °C |
| 2 May 2025, 08:25 | 13.9 | 13.9 °C |
| 11 Apr 2025, 11:38 | 11.5 | 11.5 °C |
| 5 Mar 2025, 09:04 | 5.8 | 5.8 °C |
| 7 Feb 2025, 14:50 | 6.8 | 6.8 °C |
| 9 Jan 2025, 14:48 | 6.3 | 6.3 °C |
| 6 Dec 2024, 13:45 | 9.2 | 9.2 °C |
| 7 Nov 2024, 15:09 | 12 | 12 °C |
| 11 Oct 2024, 08:35 | 9.7 | 9.7 °C |
| 5 Sep 2024, 13:19 | 15.5 | 15.5 °C |
| 2 Aug 2024, 13:00 | 18.8 | 18.8 °C |
| 4 Jul 2024, 11:54 | 14.9 | 14.9 °C |
| 17 Jun 2024, 13:50 | 15 | 15 °C |
| 2 May 2024, 12:36 | 12.4 | 12.4 °C |
| 3 Apr 2024, 12:43 | 11.4 | 11.4 °C |
| 6 Mar 2024, 13:36 | 9.5 | 9.5 °C |
| 7 Feb 2024, 09:57 | 8.8 | 8.8 °C |
| 12 Jan 2024, 14:47 | 7.9 | 7.9 °C |
| 5 Dec 2023, 12:25 | 8.7 | 8.7 °C |
| 9 Nov 2023, 08:33 | 9.6 | 9.6 °C |
| 6 Oct 2023, 08:46 | 13.2 | 13.2 °C |
pH
code 0061
8.07
Sampled 9 Sep 2026, 22 days ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Sep 2026, 08:34 | 8.07 | 8.07 |
| 24 Aug 2026, 14:04 | 8.05 | 8.05 |
| 10 Jul 2026, 13:15 | 7.92 | 7.92 |
| 22 Jun 2026, 14:13 | 7.83 | 7.83 |
| 28 May 2026, 13:38 | 7.84 | 7.84 |
| 27 Apr 2026, 14:43 | 8.01 | 8.01 |
| 6 Mar 2026, 10:18 | 7.78 | 7.78 |
| 6 Feb 2026, 08:54 | 7.65 | 7.65 |
| 9 Jan 2026, 15:19 | 7.72 | 7.72 |
| 1 Dec 2025, 14:09 | 7.83 | 7.83 |
| 5 Nov 2025, 08:37 | 7.96 | 7.96 |
| 2 Oct 2025, 10:09 | 7.96 | 7.96 |
| 11 Sep 2025, 14:19 | 8.06 | 8.06 |
| 13 Aug 2025, 11:37 | 7.98 | 7.98 |
| 23 Jul 2025, 11:20 | 7.87 | 7.87 |
| 26 Jun 2025, 13:16 | 7.98 | 7.98 |
| 2 May 2025, 08:25 | 7.9 | 7.9 |
| 11 Apr 2025, 11:38 | 7.94 | 7.94 |
| 5 Mar 2025, 09:04 | 7.77 | 7.77 |
| 7 Feb 2025, 14:50 | 7.78 | 7.78 |
| 9 Jan 2025, 14:48 | 7.77 | 7.77 |
| 6 Dec 2024, 13:45 | 7.7 | 7.7 |
| 7 Nov 2024, 15:09 | 7.63 | 7.63 |
| 11 Oct 2024, 08:35 | 7.64 | 7.64 |
| 5 Sep 2024, 13:19 | 7.85 | 7.85 |
| 2 Aug 2024, 13:00 | 7.66 | 7.66 |
| 4 Jul 2024, 11:54 | 7.88 | 7.88 |
| 17 Jun 2024, 13:50 | 7.87 | 7.87 |
| 2 May 2024, 12:36 | 7.79 | 7.79 |
| 3 Apr 2024, 12:43 | 7.84 | 7.84 |
| 6 Mar 2024, 13:36 | 7.63 | 7.63 |
| 7 Feb 2024, 09:57 | 7.63 | 7.63 |
| 12 Jan 2024, 14:47 | 7.69 | 7.69 |
| 5 Dec 2023, 12:25 | 7.64 | 7.64 |
| 9 Nov 2023, 08:33 | 7.59 | 7.59 |
| 6 Oct 2023, 08:46 | 7.86 | 7.86 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 9 Sep 2026, 22 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Sep 2026, 08:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Aug 2026, 14:04 | 0.048 | 0.048 mg/l |
| 10 Jul 2026, 13:15 | 0.088 | 0.088 mg/l |
| 22 Jun 2026, 14:13 | 0.07 | 0.07 mg/l |
| 28 May 2026, 13:38 | 0.063 | 0.063 mg/l |
| 27 Apr 2026, 14:43 | 0.37 | 0.37 mg/l |
| 6 Mar 2026, 10:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Feb 2026, 08:54 | 0.052 | 0.052 mg/l |
| 9 Jan 2026, 15:19 | 0.047 | 0.047 mg/l |
| 1 Dec 2025, 14:09 | 0.18 | 0.18 mg/l |
| 5 Nov 2025, 08:37 | 0.096 | 0.096 mg/l |
| 2 Oct 2025, 10:09 | 0.063 | 0.063 mg/l |
| 11 Sep 2025, 14:19 | 0.032 | 0.032 mg/l |
| 13 Aug 2025, 11:37 | 0.13 | 0.13 mg/l |
| 23 Jul 2025, 11:20 | 0.053 | 0.053 mg/l |
| 26 Jun 2025, 13:16 | 0.22 | 0.22 mg/l |
| 2 May 2025, 08:25 | 0.061 | 0.061 mg/l |
| 11 Apr 2025, 11:38 | 0.046 | 0.046 mg/l |
| 5 Mar 2025, 09:04 | 0.049 | 0.049 mg/l |
| 7 Feb 2025, 14:50 | 0.047 | 0.047 mg/l |
| 9 Jan 2025, 14:48 | 0.043 | 0.043 mg/l |
| 7 Nov 2024, 15:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Oct 2024, 08:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Sep 2024, 13:19 | 0.054 | 0.054 mg/l |
| 2 Aug 2024, 13:00 | 0.047 | 0.047 mg/l |
| 4 Jul 2024, 11:54 | 0.041 | 0.041 mg/l |
| 17 Jun 2024, 13:50 | 0.062 | 0.062 mg/l |
| 2 May 2024, 12:36 | 0.051 | 0.051 mg/l |
| 3 Apr 2024, 12:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Mar 2024, 13:36 | 0.042 | 0.042 mg/l |
| 7 Feb 2024, 09:57 | 0.039 | 0.039 mg/l |
| 12 Jan 2024, 14:47 | 0.066 | 0.066 mg/l |
| 5 Dec 2023, 12:25 | 0.03 | 0.03 mg/l |
| 9 Nov 2023, 08:33 | 0.046 | 0.046 mg/l |
| 6 Oct 2023, 08:46 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
14 mg/l
Sampled 9 Sep 2026, 22 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Sep 2026, 08:34 | 14 | 14 mg/l |
| 24 Aug 2026, 14:04 | 23 | 23 mg/l |
| 10 Jul 2026, 13:15 | 15.9 | 15.9 mg/l |
| 22 Jun 2026, 14:13 | 18.9 | 18.9 mg/l |
| 28 May 2026, 13:38 | 15.9 | 15.9 mg/l |
| 27 Apr 2026, 14:43 | 13.9 | 13.9 mg/l |
| 6 Mar 2026, 10:18 | 11 | 11 mg/l |
| 6 Feb 2026, 08:54 | 8.37 | 8.37 mg/l |
| 9 Jan 2026, 15:19 | 8.37 | 8.37 mg/l |
| 1 Dec 2025, 14:09 | 11.9 | 11.9 mg/l |
| 5 Nov 2025, 08:37 | 11.9 | 11.9 mg/l |
| 2 Oct 2025, 10:09 | 18 | 18 mg/l |
| 11 Sep 2025, 14:19 | 14 | 14 mg/l |
| 13 Aug 2025, 11:37 | 20 | 20 mg/l |
| 23 Jul 2025, 11:20 | 19 | 19 mg/l |
| 26 Jun 2025, 13:16 | 18.9 | 18.9 mg/l |
| 2 May 2025, 08:25 | 13 | 13 mg/l |
| 11 Apr 2025, 11:38 | 15 | 15 mg/l |
| 5 Mar 2025, 09:04 | 9.97 | 9.97 mg/l |
| 7 Feb 2025, 14:50 | 9.78 | 9.78 mg/l |
| 9 Jan 2025, 14:48 | 8.98 | 8.98 mg/l |
| 7 Nov 2024, 15:09 | 11 | 11 mg/l |
| 11 Oct 2024, 08:35 | 8.58 | 8.58 mg/l |
| 5 Sep 2024, 13:19 | 19 | 19 mg/l |
| 2 Aug 2024, 13:00 | 11.9 | 11.9 mg/l |
| 4 Jul 2024, 11:54 | 18 | 18 mg/l |
| 17 Jun 2024, 13:50 | 15.9 | 15.9 mg/l |
| 2 May 2024, 12:36 | 9.77 | 9.77 mg/l |
| 3 Apr 2024, 12:43 | 7.78 | 7.78 mg/l |
| 6 Mar 2024, 13:36 | 9.38 | 9.38 mg/l |
| 7 Feb 2024, 09:57 | 8.18 | 8.18 mg/l |
| 12 Jan 2024, 14:47 | 8.58 | 8.58 mg/l |
| 5 Dec 2023, 12:25 | 7.88 | 7.88 mg/l |
| 9 Nov 2023, 08:33 | 8.77 | 8.77 mg/l |
| 6 Oct 2023, 08:46 | 11 | 11 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.28 mg/l
Sampled 9 Sep 2026, 22 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Sep 2026, 08:34 | 0.28 | 0.28 mg/l |
| 24 Aug 2026, 14:04 | 0.45 | 0.45 mg/l |
| 10 Jul 2026, 13:15 | 0.62 | 0.62 mg/l |
| 22 Jun 2026, 14:13 | 0.49 | 0.49 mg/l |
| 28 May 2026, 13:38 | 0.45 | 0.45 mg/l |
| 27 Apr 2026, 14:43 | 0.26 | 0.26 mg/l |
| 6 Mar 2026, 10:18 | 0.18 | 0.18 mg/l |
| 6 Feb 2026, 08:54 | 0.14 | 0.14 mg/l |
| 9 Jan 2026, 15:19 | 0.15 | 0.15 mg/l |
| 1 Dec 2025, 14:09 | 0.24 | 0.24 mg/l |
| 5 Nov 2025, 08:37 | 0.22 | 0.22 mg/l |
| 2 Oct 2025, 10:09 | 0.54 | 0.54 mg/l |
| 11 Sep 2025, 14:19 | 0.43 | 0.43 mg/l |
| 13 Aug 2025, 11:37 | 0.5 | 0.5 mg/l |
| 23 Jul 2025, 11:20 | 0.71 | 0.71 mg/l |
| 26 Jun 2025, 13:16 | 0.52 | 0.52 mg/l |
| 2 May 2025, 08:25 | 0.24 | 0.24 mg/l |
| 11 Apr 2025, 11:38 | 0.29 | 0.29 mg/l |
| 5 Mar 2025, 09:04 | 0.13 | 0.13 mg/l |
| 7 Feb 2025, 14:50 | 0.14 | 0.14 mg/l |
| 9 Jan 2025, 14:48 | 0.15 | 0.15 mg/l |
| 7 Nov 2024, 15:09 | 0.2 | 0.2 mg/l |
| 11 Oct 2024, 08:35 | 0.14 | 0.14 mg/l |
| 5 Sep 2024, 13:19 | 0.44 | 0.44 mg/l |
| 2 Aug 2024, 13:00 | 0.32 | 0.32 mg/l |
| 4 Jul 2024, 11:54 | 0.33 | 0.33 mg/l |
| 17 Jun 2024, 13:50 | 0.27 | 0.27 mg/l |
| 2 May 2024, 12:36 | 0.2 | 0.2 mg/l |
| 3 Apr 2024, 12:43 | 0.12 | 0.12 mg/l |
| 6 Mar 2024, 13:36 | 0.12 | 0.12 mg/l |
| 7 Feb 2024, 09:57 | 0.14 | 0.14 mg/l |
| 12 Jan 2024, 14:47 | 0.11 | 0.11 mg/l |
| 5 Dec 2023, 12:25 | 0.16 | 0.16 mg/l |
| 9 Nov 2023, 08:33 | 0.16 | 0.16 mg/l |
| 6 Oct 2023, 08:46 | 0.23 | 0.23 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
752 µS/cm
Sampled 9 Sep 2026, 22 days ago · 36 results banked
Every result (36)
| Sampled | Result as published | Reads as |
|---|---|---|
| 9 Sep 2026, 08:34 | 752 | 752 µS/cm |
| 24 Aug 2026, 14:04 | 1000 | 1000 µS/cm |
| 10 Jul 2026, 13:15 | 907 | 907 µS/cm |
| 22 Jun 2026, 14:13 | 819 | 819 µS/cm |
| 28 May 2026, 13:38 | 800 | 800 µS/cm |
| 27 Apr 2026, 14:43 | 750 | 750 µS/cm |
| 6 Mar 2026, 10:18 | 755 | 755 µS/cm |
| 6 Feb 2026, 08:54 | 704 | 704 µS/cm |
| 9 Jan 2026, 15:19 | 809 | 809 µS/cm |
| 1 Dec 2025, 14:09 | 842 | 842 µS/cm |
| 5 Nov 2025, 08:37 | 824 | 824 µS/cm |
| 2 Oct 2025, 10:09 | 914 | 914 µS/cm |
| 11 Sep 2025, 14:19 | 769 | 769 µS/cm |
| 13 Aug 2025, 11:37 | 876 | 876 µS/cm |
| 23 Jul 2025, 11:20 | 871 | 871 µS/cm |
| 26 Jun 2025, 13:16 | 841 | 841 µS/cm |
| 2 May 2025, 08:25 | 738 | 738 µS/cm |
| 11 Apr 2025, 11:38 | 780 | 780 µS/cm |
| 5 Mar 2025, 09:04 | 757 | 757 µS/cm |
| 7 Feb 2025, 14:50 | 748 | 748 µS/cm |
| 9 Jan 2025, 14:48 | 756 | 756 µS/cm |
| 6 Dec 2024, 13:45 | 748 | 748 µS/cm |
| 7 Nov 2024, 15:09 | 763 | 763 µS/cm |
| 11 Oct 2024, 08:35 | 761 | 761 µS/cm |
| 5 Sep 2024, 13:19 | 826 | 826 µS/cm |
| 2 Aug 2024, 13:00 | 676 | 676 µS/cm |
| 4 Jul 2024, 11:54 | 813 | 813 µS/cm |
| 17 Jun 2024, 13:50 | 772 | 772 µS/cm |
| 2 May 2024, 12:36 | 749 | 749 µS/cm |
| 3 Apr 2024, 12:43 | 729 | 729 µS/cm |
| 6 Mar 2024, 13:36 | 748 | 748 µS/cm |
| 7 Feb 2024, 09:57 | 701 | 701 µS/cm |
| 12 Jan 2024, 14:47 | 771 | 771 µS/cm |
| 5 Dec 2023, 12:25 | 772 | 772 µS/cm |
| 9 Nov 2023, 08:33 | 801 | 801 µS/cm |
| 6 Oct 2023, 08:46 | 771 | 771 µS/cm |
Everything measured here
13 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 13 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 36 | Oct 2023 – Sep 2026 | 89.1% 9 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 36 | Oct 2023 – Sep 2026 | 9.3 mg/l 9 Sep 2026 |
| Temperature of Water 0076 | River water | 36 | Oct 2023 – Sep 2026 | 13.3 °C 9 Sep 2026 |
| pH 0061 | River water | 36 | Oct 2023 – Sep 2026 | 8.07 9 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 35 | Oct 2023 – Sep 2026 | below 0.03 mg/l 9 Sep 2026 |
| Nitrate as N 0117 | River water | 35 | Oct 2023 – Sep 2026 | 14 mg/l 9 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 35 | Oct 2023 – Sep 2026 | 0.28 mg/l 9 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 36 | Oct 2023 – Sep 2026 | 752 µS/cm 9 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 35 | Oct 2023 – Sep 2026 | 200 mg/l 9 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 35 | Oct 2023 – Sep 2026 | below 0.0007 mg/l 9 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – Mar 2026 | 1.6 mg/l 6 Mar 2026 |
| Nitrite as N 0118 | River water | 35 | Oct 2023 – Sep 2026 | 0.048 mg/l 9 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 35 | Oct 2023 – Sep 2026 | 14 mg/l 9 Sep 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.