Thames at Cookham Bridge
EA name: THAMES AT COOKHAM BRIDGE
Environment Agency sampling point TH-PTHR0082 · 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
- 16 Jul 2026, 11:403 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 34 since 16 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 489800, 185600As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Thames
- River, by the map
- River ThamesPlaced on the river its name gives, 7 m from the line.
- Next gauge downstream
- Cookham Lock On the River Thames · 0.8 km along the river
- Nearest gauge upstream
- Bourne End On the River Wye · 1.4 km along the riverMarlow Lock On the River Thames · 6.3 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (32 samples)
Monitoring (national agency policy) (2 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
107.6%
Sampled 16 Jul 2026, 3 months ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jul 2026, 11:40 | 107.6 | 107.6% |
| 23 Jun 2026, 12:21 | 94.2 | 94.2% |
| 7 May 2026, 12:32 | 101.7 | 101.7% |
| 17 Apr 2026, 12:36 | 110.6 | 110.6% |
| 10 Mar 2026, 11:44 | 102.5 | 102.5% |
| 6 Feb 2026, 10:57 | 96.3 | 96.3% |
| 16 Jan 2026, 12:11 | 100.4 | 100.4% |
| 5 Dec 2025, 09:08 | 102.1 | 102.1% |
| 20 Nov 2025, 12:47 | 100.2 | 100.2% |
| 31 Oct 2025, 10:18 | 95.8 | 95.8% |
| 12 Sep 2025, 09:36 | 91.1 | 91.1% |
| 15 Aug 2025, 10:58 | 100.3 | 100.3% |
| 24 Jul 2025, 11:41 | 95.2 | 95.2% |
| 24 Jun 2025, 11:35 | 97.4 | 97.4% |
| 9 May 2025, 14:48 | 119.8 | 119.8% |
| 22 Apr 2025, 11:11 | 120.3 | 120.3% |
| 18 Mar 2025, 09:35 | 102.8 | 102.8% |
| 19 Feb 2025, 10:56 | 103.8 | 103.8% |
| 20 Jan 2025, 12:28 | 103.8 | 103.8% |
| 5 Dec 2024, 09:58 | 99.8 | 99.8% |
| 19 Nov 2024, 11:32 | 100.5 | 100.5% |
| 15 Oct 2024, 12:18 | 99.1 | 99.1% |
| 16 Sep 2024, 09:47 | 94.9 | 94.9% |
| 21 Aug 2024, 13:30 | 99.4 | 99.4% |
| 15 Jul 2024, 10:46 | 96.5 | 96.5% |
| 19 Jun 2024, 12:23 | 111.1 | 111.1% |
| 22 May 2024, 09:56 | 97.5 | 97.5% |
| 17 Apr 2024, 10:30 | 102 | 102% |
| 20 Mar 2024, 10:29 | 99.3 | 99.3% |
| 20 Feb 2024, 10:31 | 96.8 | 96.8% |
| 17 Jan 2024, 12:08 | 101 | 101% |
| 8 Dec 2023, 11:00 | 99.9 | 99.9% |
| 20 Nov 2023, 10:15 | 96.4 | 96.4% |
| 16 Oct 2023, 09:15 | 97.5 | 97.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.3 mg/l
Sampled 16 Jul 2026, 3 months ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jul 2026, 11:40 | 9.3 | 9.3 mg/l |
| 23 Jun 2026, 12:21 | 8.05 | 8.05 mg/l |
| 7 May 2026, 12:32 | 10.2 | 10.2 mg/l |
| 17 Apr 2026, 12:36 | 11.5 | 11.5 mg/l |
| 10 Mar 2026, 11:44 | 11.5 | 11.5 mg/l |
| 6 Feb 2026, 10:57 | 11.5 | 11.5 mg/l |
| 16 Jan 2026, 12:11 | 12.2 | 12.2 mg/l |
| 5 Dec 2025, 09:08 | 12.6 | 12.6 mg/l |
| 20 Nov 2025, 12:47 | 12.1 | 12.1 mg/l |
| 31 Oct 2025, 10:18 | 10.5 | 10.5 mg/l |
| 12 Sep 2025, 09:36 | 8.95 | 8.95 mg/l |
| 15 Aug 2025, 10:58 | 8.99 | 8.99 mg/l |
| 24 Jul 2025, 11:41 | 8.65 | 8.65 mg/l |
| 24 Jun 2025, 11:35 | 8.82 | 8.82 mg/l |
| 9 May 2025, 14:48 | 12.1 | 12.1 mg/l |
| 22 Apr 2025, 11:11 | 12.8 | 12.8 mg/l |
| 18 Mar 2025, 09:35 | 12.4 | 12.4 mg/l |
| 19 Feb 2025, 10:56 | 13.1 | 13.1 mg/l |
| 20 Jan 2025, 12:28 | 12.8 | 12.8 mg/l |
| 5 Dec 2024, 09:58 | 11.6 | 11.6 mg/l |
| 19 Nov 2024, 11:32 | 11.4 | 11.4 mg/l |
| 15 Oct 2024, 12:18 | 11 | 11 mg/l |
| 16 Sep 2024, 09:47 | 9.65 | 9.65 mg/l |
| 21 Aug 2024, 13:30 | 9.33 | 9.33 mg/l |
| 15 Jul 2024, 10:46 | 9.26 | 9.26 mg/l |
| 19 Jun 2024, 12:23 | 10.7 | 10.7 mg/l |
| 22 May 2024, 09:56 | 9.66 | 9.66 mg/l |
| 17 Apr 2024, 10:30 | 11.3 | 11.3 mg/l |
| 20 Mar 2024, 10:29 | 10.8 | 10.8 mg/l |
| 20 Feb 2024, 10:31 | 10.9 | 10.9 mg/l |
| 17 Jan 2024, 12:08 | 13.2 | 13.2 mg/l |
| 8 Dec 2023, 11:00 | 12.1 | 12.1 mg/l |
| 20 Nov 2023, 10:15 | 10.9 | 10.9 mg/l |
| 16 Oct 2023, 09:15 | 10.5 | 10.5 mg/l |
Water temperature
code 0076 · °C
22.5 °C
Sampled 16 Jul 2026, 3 months ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jul 2026, 11:40 | 22.5 | 22.5 °C |
| 23 Jun 2026, 12:21 | 23.1 | 23.1 °C |
| 7 May 2026, 12:32 | 15.2 | 15.2 °C |
| 17 Apr 2026, 12:36 | 13.3 | 13.3 °C |
| 10 Mar 2026, 11:44 | 10 | 10 °C |
| 6 Feb 2026, 10:57 | 7.7 | 7.7 °C |
| 16 Jan 2026, 12:11 | 6.9 | 6.9 °C |
| 5 Dec 2025, 09:08 | 6.2 | 6.2 °C |
| 20 Nov 2025, 12:47 | 7.1 | 7.1 °C |
| 31 Oct 2025, 10:18 | 11.3 | 11.3 °C |
| 12 Sep 2025, 09:36 | 16.1 | 16.1 °C |
| 15 Aug 2025, 10:58 | 20.6 | 20.6 °C |
| 24 Jul 2025, 11:41 | 19.9 | 19.9 °C |
| 24 Jun 2025, 11:35 | 20.1 | 20.1 °C |
| 9 May 2025, 14:48 | 14.7 | 14.7 °C |
| 22 Apr 2025, 11:11 | 12.5 | 12.5 °C |
| 18 Mar 2025, 09:35 | 7.3 | 7.3 °C |
| 19 Feb 2025, 10:56 | 5.4 | 5.4 °C |
| 20 Jan 2025, 12:28 | 6.3 | 6.3 °C |
| 5 Dec 2024, 09:58 | 8.6 | 8.6 °C |
| 19 Nov 2024, 11:32 | 9.7 | 9.7 °C |
| 15 Oct 2024, 12:18 | 10.8 | 10.8 °C |
| 16 Sep 2024, 09:47 | 14.5 | 14.5 °C |
| 21 Aug 2024, 13:30 | 18.3 | 18.3 °C |
| 15 Jul 2024, 10:46 | 17.2 | 17.2 °C |
| 19 Jun 2024, 12:23 | 17.2 | 17.2 °C |
| 22 May 2024, 09:56 | 15.7 | 15.7 °C |
| 17 Apr 2024, 10:30 | 10.9 | 10.9 °C |
| 20 Mar 2024, 10:29 | 11.5 | 11.5 °C |
| 20 Feb 2024, 10:31 | 10.1 | 10.1 °C |
| 17 Jan 2024, 12:08 | 4 | 4 °C |
| 8 Dec 2023, 11:00 | 7.1 | 7.1 °C |
| 20 Nov 2023, 10:15 | 9.8 | 9.8 °C |
| 16 Oct 2023, 09:15 | 12.1 | 12.1 °C |
pH
code 0061
8.12
Sampled 16 Jul 2026, 3 months ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jul 2026, 11:40 | 8.12 | 8.12 |
| 23 Jun 2026, 12:21 | 7.97 | 7.97 |
| 7 May 2026, 12:32 | 8.06 | 8.06 |
| 17 Apr 2026, 12:36 | 8.27 | 8.27 |
| 10 Mar 2026, 11:44 | 8.12 | 8.12 |
| 6 Feb 2026, 10:57 | 8.07 | 8.07 |
| 16 Jan 2026, 12:11 | 8.13 | 8.13 |
| 5 Dec 2025, 09:08 | 8.21 | 8.21 |
| 20 Nov 2025, 12:47 | 8.04 | 8.04 |
| 31 Oct 2025, 10:18 | 8.02 | 8.02 |
| 12 Sep 2025, 09:36 | 7.98 | 7.98 |
| 15 Aug 2025, 10:58 | 8.09 | 8.09 |
| 24 Jul 2025, 11:41 | 7.97 | 7.97 |
| 24 Jun 2025, 11:35 | 7.96 | 7.96 |
| 9 May 2025, 14:48 | 8.24 | 8.24 |
| 22 Apr 2025, 11:11 | 8.51 | 8.51 |
| 18 Mar 2025, 09:35 | 8.29 | 8.29 |
| 19 Feb 2025, 10:56 | 8.15 | 8.15 |
| 20 Jan 2025, 12:28 | 8.16 | 8.16 |
| 5 Dec 2024, 09:58 | 8.05 | 8.05 |
| 19 Nov 2024, 11:32 | 8.19 | 8.19 |
| 15 Oct 2024, 12:18 | 8.02 | 8.02 |
| 16 Sep 2024, 09:47 | 7.7 | 7.7 |
| 21 Aug 2024, 13:30 | 8.07 | 8.07 |
| 15 Jul 2024, 10:46 | 8.16 | 8.16 |
| 19 Jun 2024, 12:23 | 8.22 | 8.22 |
| 22 May 2024, 09:56 | 8.18 | 8.18 |
| 17 Apr 2024, 10:30 | 8.2 | 8.2 |
| 20 Mar 2024, 10:29 | 8.17 | 8.17 |
| 20 Feb 2024, 10:31 | 8.11 | 8.11 |
| 17 Jan 2024, 12:08 | 8.24 | 8.24 |
| 8 Dec 2023, 11:00 | 8.15 | 8.15 |
| 20 Nov 2023, 10:15 | 8.02 | 8.02 |
| 16 Oct 2023, 09:15 | 8.08 | 8.08 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.053 mg/l
Sampled 16 Jul 2026, 3 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jul 2026, 11:40 | 0.053 | 0.053 mg/l |
| 23 Jun 2026, 12:21 | 0.26 | 0.26 mg/l |
| 7 May 2026, 12:32 | 0.039 | 0.039 mg/l |
| 17 Apr 2026, 12:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Mar 2026, 11:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Feb 2026, 10:57 | 0.051 | 0.051 mg/l |
| 16 Jan 2026, 12:11 | 0.05 | 0.05 mg/l |
| 5 Dec 2025, 09:08 | 0.03 | 0.03 mg/l |
| 20 Nov 2025, 12:47 | 0.07 | 0.07 mg/l |
| 31 Oct 2025, 10:18 | 0.055 | 0.055 mg/l |
| 12 Sep 2025, 09:36 | 0.062 | 0.062 mg/l |
| 15 Aug 2025, 10:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jul 2025, 11:41 | 0.052 | 0.052 mg/l |
| 24 Jun 2025, 11:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 May 2025, 14:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Apr 2025, 11:11 | 0.057 | 0.057 mg/l |
| 18 Mar 2025, 09:35 | 0.037 | 0.037 mg/l |
| 19 Feb 2025, 10:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jan 2025, 12:28 | 0.032 | 0.032 mg/l |
| 19 Nov 2024, 11:32 | 0.038 | 0.038 mg/l |
| 15 Oct 2024, 12:18 | 0.037 | 0.037 mg/l |
| 16 Sep 2024, 09:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Aug 2024, 13:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jul 2024, 10:46 | 0.054 | 0.054 mg/l |
| 19 Jun 2024, 12:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 May 2024, 09:56 | 0.056 | 0.056 mg/l |
| 17 Apr 2024, 10:30 | 0.042 | 0.042 mg/l |
| 20 Mar 2024, 10:29 | 0.034 | 0.034 mg/l |
| 20 Feb 2024, 10:31 | 0.033 | 0.033 mg/l |
| 17 Jan 2024, 12:08 | 0.051 | 0.051 mg/l |
| 8 Dec 2023, 11:00 | 0.055 | 0.055 mg/l |
| 20 Nov 2023, 10:15 | 0.04 | 0.04 mg/l |
| 16 Oct 2023, 09:15 | 0.031 | 0.031 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
7.27 mg/l
Sampled 16 Jul 2026, 3 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jul 2026, 11:40 | 7.27 | 7.27 mg/l |
| 23 Jun 2026, 12:21 | 6.84 | 6.84 mg/l |
| 7 May 2026, 12:32 | 7.67 | 7.67 mg/l |
| 17 Apr 2026, 12:36 | 7.29 | 7.29 mg/l |
| 10 Mar 2026, 11:44 | 6.38 | 6.38 mg/l |
| 6 Feb 2026, 10:57 | 5.46 | 5.46 mg/l |
| 16 Jan 2026, 12:11 | 6.57 | 6.57 mg/l |
| 5 Dec 2025, 09:08 | 7.89 | 7.89 mg/l |
| 20 Nov 2025, 12:47 | 7.17 | 7.17 mg/l |
| 31 Oct 2025, 10:18 | 8.77 | 8.77 mg/l |
| 12 Sep 2025, 09:36 | 8.17 | 8.17 mg/l |
| 15 Aug 2025, 10:58 | 7.88 | 7.88 mg/l |
| 24 Jul 2025, 11:41 | 7.55 | 7.55 mg/l |
| 24 Jun 2025, 11:35 | 7.38 | 7.38 mg/l |
| 9 May 2025, 14:48 | 7.68 | 7.68 mg/l |
| 22 Apr 2025, 11:11 | 7.18 | 7.18 mg/l |
| 18 Mar 2025, 09:35 | 7.68 | 7.68 mg/l |
| 19 Feb 2025, 10:56 | 6.48 | 6.48 mg/l |
| 20 Jan 2025, 12:28 | 6.78 | 6.78 mg/l |
| 19 Nov 2024, 11:32 | 7.28 | 7.28 mg/l |
| 15 Oct 2024, 12:18 | 4.19 | 4.19 mg/l |
| 16 Sep 2024, 09:47 | 6.88 | 6.88 mg/l |
| 21 Aug 2024, 13:30 | 7.39 | 7.39 mg/l |
| 15 Jul 2024, 10:46 | 6.68 | 6.68 mg/l |
| 19 Jun 2024, 12:23 | 6.89 | 6.89 mg/l |
| 22 May 2024, 09:56 | 6.48 | 6.48 mg/l |
| 17 Apr 2024, 10:30 | 6.18 | 6.18 mg/l |
| 20 Mar 2024, 10:29 | 5.17 | 5.17 mg/l |
| 20 Feb 2024, 10:31 | 3.97 | 3.97 mg/l |
| 17 Jan 2024, 12:08 | 6.87 | 6.87 mg/l |
| 8 Dec 2023, 11:00 | 5.37 | 5.37 mg/l |
| 20 Nov 2023, 10:15 | 4.58 | 4.58 mg/l |
| 16 Oct 2023, 09:15 | 6.58 | 6.58 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.14 mg/l
Sampled 16 Jul 2026, 3 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jul 2026, 11:40 | 0.14 | 0.14 mg/l |
| 23 Jun 2026, 12:21 | 0.14 | 0.14 mg/l |
| 7 May 2026, 12:32 | 0.071 | 0.071 mg/l |
| 17 Apr 2026, 12:36 | 0.051 | 0.051 mg/l |
| 10 Mar 2026, 11:44 | 0.073 | 0.073 mg/l |
| 6 Feb 2026, 10:57 | 0.091 | 0.091 mg/l |
| 16 Jan 2026, 12:11 | 0.11 | 0.11 mg/l |
| 5 Dec 2025, 09:08 | 0.13 | 0.13 mg/l |
| 20 Nov 2025, 12:47 | 0.22 | 0.22 mg/l |
| 31 Oct 2025, 10:18 | 0.2 | 0.2 mg/l |
| 12 Sep 2025, 09:36 | 0.18 | 0.18 mg/l |
| 15 Aug 2025, 10:58 | 0.14 | 0.14 mg/l |
| 24 Jul 2025, 11:41 | 0.15 | 0.15 mg/l |
| 24 Jun 2025, 11:35 | 0.14 | 0.14 mg/l |
| 9 May 2025, 14:48 | 0.089 | 0.089 mg/l |
| 22 Apr 2025, 11:11 | <0.01 | below 0.01 mg/l (not detected above this) |
| 18 Mar 2025, 09:35 | 0.08 | 0.08 mg/l |
| 19 Feb 2025, 10:56 | 0.078 | 0.078 mg/l |
| 20 Jan 2025, 12:28 | 0.092 | 0.092 mg/l |
| 19 Nov 2024, 11:32 | 0.11 | 0.11 mg/l |
| 15 Oct 2024, 12:18 | 0.08 | 0.08 mg/l |
| 16 Sep 2024, 09:47 | 0.16 | 0.16 mg/l |
| 21 Aug 2024, 13:30 | 0.15 | 0.15 mg/l |
| 15 Jul 2024, 10:46 | 0.17 | 0.17 mg/l |
| 19 Jun 2024, 12:23 | 0.11 | 0.11 mg/l |
| 22 May 2024, 09:56 | 0.11 | 0.11 mg/l |
| 17 Apr 2024, 10:30 | 0.072 | 0.072 mg/l |
| 20 Mar 2024, 10:29 | 0.073 | 0.073 mg/l |
| 20 Feb 2024, 10:31 | 0.08 | 0.08 mg/l |
| 17 Jan 2024, 12:08 | 0.087 | 0.087 mg/l |
| 8 Dec 2023, 11:00 | 0.14 | 0.14 mg/l |
| 20 Nov 2023, 10:15 | 0.094 | 0.094 mg/l |
| 16 Oct 2023, 09:15 | 0.21 | 0.21 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
707 µS/cm
Sampled 16 Jul 2026, 3 months ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Jul 2026, 11:40 | 707 | 707 µS/cm |
| 23 Jun 2026, 12:21 | 663 | 663 µS/cm |
| 7 May 2026, 12:32 | 657 | 657 µS/cm |
| 17 Apr 2026, 12:36 | 644 | 644 µS/cm |
| 10 Mar 2026, 11:44 | 618 | 618 µS/cm |
| 6 Feb 2026, 10:57 | 551 | 551 µS/cm |
| 16 Jan 2026, 12:11 | 601 | 601 µS/cm |
| 5 Dec 2025, 09:08 | 642 | 642 µS/cm |
| 20 Nov 2025, 12:47 | 587 | 587 µS/cm |
| 31 Oct 2025, 10:18 | 746 | 746 µS/cm |
| 12 Sep 2025, 09:36 | 701 | 701 µS/cm |
| 15 Aug 2025, 10:58 | 705 | 705 µS/cm |
| 24 Jul 2025, 11:41 | 688 | 688 µS/cm |
| 24 Jun 2025, 11:35 | 693 | 693 µS/cm |
| 9 May 2025, 14:48 | 676 | 676 µS/cm |
| 22 Apr 2025, 11:11 | 630 | 630 µS/cm |
| 18 Mar 2025, 09:35 | 657 | 657 µS/cm |
| 19 Feb 2025, 10:56 | 652 | 652 µS/cm |
| 20 Jan 2025, 12:28 | 646 | 646 µS/cm |
| 5 Dec 2024, 09:58 | 593 | 593 µS/cm |
| 19 Nov 2024, 11:32 | 669 | 669 µS/cm |
| 15 Oct 2024, 12:18 | 574 | 574 µS/cm |
| 16 Sep 2024, 09:47 | 659 | 659 µS/cm |
| 21 Aug 2024, 13:30 | 669 | 669 µS/cm |
| 15 Jul 2024, 10:46 | 645 | 645 µS/cm |
| 19 Jun 2024, 12:23 | 658 | 658 µS/cm |
| 22 May 2024, 09:56 | 643 | 643 µS/cm |
| 17 Apr 2024, 10:30 | 619 | 619 µS/cm |
| 20 Mar 2024, 10:29 | 593 | 593 µS/cm |
| 20 Feb 2024, 10:31 | 515 | 515 µS/cm |
| 17 Jan 2024, 12:08 | 628 | 628 µS/cm |
| 8 Dec 2023, 11:00 | 573 | 573 µS/cm |
| 20 Nov 2023, 10:15 | 584 | 584 µS/cm |
| 16 Oct 2023, 09:15 | 650 | 650 µS/cm |
Everything measured here
66 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 66 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 34 | Oct 2023 – Jul 2026 | 107.6% 16 Jul 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 34 | Oct 2023 – Jul 2026 | 9.3 mg/l 16 Jul 2026 |
| Temperature of Water 0076 | River water | 34 | Oct 2023 – Jul 2026 | 22.5 °C 16 Jul 2026 |
| pH 0061 | River water | 34 | Oct 2023 – Jul 2026 | 8.12 16 Jul 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 33 | Oct 2023 – Jul 2026 | 0.053 mg/l 16 Jul 2026 |
| Nitrate as N 0117 | River water | 33 | Oct 2023 – Jul 2026 | 7.27 mg/l 16 Jul 2026 |
| Orthophosphate, reactive as P 0180 | River water | 33 | Oct 2023 – Jul 2026 | 0.14 mg/l 16 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 34 | Oct 2023 – Jul 2026 | 707 µS/cm 16 Jul 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 | 33 | Oct 2023 – Jul 2026 | 220 mg/l 16 Jul 2026 |
| Ammonia un-ionised as N 0119 | River water | 33 | Oct 2023 – Jul 2026 | 0.00239 mg/l 16 Jul 2026 |
| BOD : 5 Day ATU 0085 | River water | 30 | Oct 2023 – Mar 2026 | 1.6 mg/l 10 Mar 2026 |
| Cadmium, Dissolved 0106 | River water | 2 | Oct 2023 – Jan 2024 | below 0.01 µg/l 17 Jan 2024 |
| Calcium, Dissolved 0239 | River water | 2 | Oct 2023 – Jan 2024 | 110 mg/l 17 Jan 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 2 | Oct 2023 – Jan 2024 | 3.5 mg/l 17 Jan 2024 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 19 Jun 2024 |
| Magnesium, Dissolved 0235 | River water | 2 | Oct 2023 – Jan 2024 | 4 mg/l 17 Jan 2024 |
| Mercury, Dissolved 0103 | River water | 2 | Oct 2023 – Jan 2024 | below 0.01 µg/l 17 Jan 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 – Jul 2026 | 0.03 mg/l 16 Jul 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 33 | Oct 2023 – Jul 2026 | 7.3 mg/l 16 Jul 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 | 0.0021 µg/l 19 Jun 2024 |
| Perfluorobutanoic acid 2995 | River water | 1 | Jun 2024 – Jun 2024 | 0.0021 µg/l 19 Jun 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Jun 2024 – Jun 2024 | 0.0005 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 | 0.0011 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 | 0.0005 µg/l 19 Jun 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Jun 2024 – Jun 2024 | 0.0024 µg/l 19 Jun 2024 |
| Perfluorohexanoic acid 8888 | River water | 1 | Jun 2024 – Jun 2024 | 0.0028 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 | 0.0017 µg/l 19 Jun 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Jun 2024 – Jun 2024 | 0.0024 µg/l 19 Jun 2024 |
| Perfluorooctanoic acid 8890 | River water | 1 | Jun 2024 – Jun 2024 | 0.0016 µg/l 19 Jun 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 0.003 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 | 9 | Apr 2025 – Mar 2026 | 0.095 mg/l 10 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.