Lee at Dobbs Weir
EA name: LEE AT DOBBS WEIR
Environment Agency sampling point TH-PLER0060 · 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, 11:4927 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 34 since 4 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 538507, 208136As published, to the nearest 1 m. Open in a map
- River, by its own name
- Lee
- River, by the map
- River LeaPlaced on the river its name gives, 80 m from the line.
- Next gauge downstream
- None tracedThe map stops before any gauge.
- Nearest gauge upstream
- Hoddesdon, Rye Bridge On the River Lee · 2.3 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (34 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
83.3%
Sampled 4 Sep 2026, 27 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:49 | 83.3 | 83.3% |
| 6 Aug 2026, 13:05 | 99.8 | 99.8% |
| 6 Jul 2026, 09:18 | 82.2 | 82.2% |
| 4 Jun 2026, 08:59 | 82.4 | 82.4% |
| 5 May 2026, 08:35 | 86.9 | 86.9% |
| 8 Apr 2026, 14:26 | 98.7 | 98.7% |
| 4 Mar 2026, 08:31 | 93.4 | 93.4% |
| 6 Feb 2026, 10:33 | 96.2 | 96.2% |
| 20 Jan 2026, 09:09 | 88.1 | 88.1% |
| 3 Dec 2025, 12:51 | 86.7 | 86.7% |
| 4 Nov 2025, 12:35 | 86.6 | 86.6% |
| 14 Oct 2025, 12:27 | 82.1 | 82.1% |
| 4 Sep 2025, 11:05 | 84.3 | 84.3% |
| 13 Aug 2025, 09:57 | 92.2 | 92.2% |
| 23 Jul 2025, 13:38 | 94.7 | 94.7% |
| 11 Jun 2025, 12:14 | 94.3 | 94.3% |
| 21 May 2025, 10:36 | 91.1 | 91.1% |
| 1 Apr 2025, 09:11 | 96.6 | 96.6% |
| 7 Mar 2025, 11:02 | 97.2 | 97.2% |
| 4 Feb 2025, 12:21 | 94.4 | 94.4% |
| 21 Jan 2025, 11:30 | 94.6 | 94.6% |
| 10 Dec 2024, 10:05 | 89.7 | 89.7% |
| 26 Nov 2024, 11:37 | 91.7 | 91.7% |
| 14 Oct 2024, 13:21 | 87.7 | 87.7% |
| 17 Sep 2024, 14:18 | 94.2 | 94.2% |
| 22 Aug 2024, 12:10 | 94.6 | 94.6% |
| 15 Jul 2024, 11:09 | 95.4 | 95.4% |
| 17 Jun 2024, 09:22 | 89.8 | 89.8% |
| 1 Mar 2024, 08:08 | 93.9 | 93.9% |
| 6 Feb 2024, 11:43 | 94.7 | 94.7% |
| 3 Jan 2024, 16:11 | 94.7 | 94.7% |
| 5 Dec 2023, 13:35 | 95.3 | 95.3% |
| 3 Nov 2023, 08:21 | 93.2 | 93.2% |
| 4 Oct 2023, 16:06 | 82.6 | 82.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.66 mg/l
Sampled 4 Sep 2026, 27 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:49 | 7.66 | 7.66 mg/l |
| 6 Aug 2026, 13:05 | 9.02 | 9.02 mg/l |
| 6 Jul 2026, 09:18 | 7.25 | 7.25 mg/l |
| 4 Jun 2026, 08:59 | 7.96 | 7.96 mg/l |
| 5 May 2026, 08:35 | 8.89 | 8.89 mg/l |
| 8 Apr 2026, 14:26 | 10 | 10 mg/l |
| 4 Mar 2026, 08:31 | 10.6 | 10.6 mg/l |
| 6 Feb 2026, 10:33 | 11.4 | 11.4 mg/l |
| 20 Jan 2026, 09:09 | 10.2 | 10.2 mg/l |
| 3 Dec 2025, 12:51 | 10 | 10 mg/l |
| 4 Nov 2025, 12:35 | 9.16 | 9.16 mg/l |
| 14 Oct 2025, 12:27 | 8.46 | 8.46 mg/l |
| 4 Sep 2025, 11:05 | 8.13 | 8.13 mg/l |
| 13 Aug 2025, 09:57 | 8.2 | 8.2 mg/l |
| 23 Jul 2025, 13:38 | 8.74 | 8.74 mg/l |
| 11 Jun 2025, 12:14 | 9.09 | 9.09 mg/l |
| 21 May 2025, 10:36 | 9.03 | 9.03 mg/l |
| 1 Apr 2025, 09:11 | 10.5 | 10.5 mg/l |
| 7 Mar 2025, 11:02 | 11.3 | 11.3 mg/l |
| 4 Feb 2025, 12:21 | 11.6 | 11.6 mg/l |
| 21 Jan 2025, 11:30 | 11.7 | 11.7 mg/l |
| 10 Dec 2024, 10:05 | 10.7 | 10.7 mg/l |
| 26 Nov 2024, 11:37 | 10.4 | 10.4 mg/l |
| 14 Oct 2024, 13:21 | 9.52 | 9.52 mg/l |
| 17 Sep 2024, 14:18 | 9.43 | 9.43 mg/l |
| 22 Aug 2024, 12:10 | 9.12 | 9.12 mg/l |
| 15 Jul 2024, 11:09 | 9.16 | 9.16 mg/l |
| 17 Jun 2024, 09:22 | 8.92 | 8.92 mg/l |
| 1 Mar 2024, 08:08 | 11 | 11 mg/l |
| 6 Feb 2024, 11:43 | 10.6 | 10.6 mg/l |
| 3 Jan 2024, 16:11 | 11 | 11 mg/l |
| 5 Dec 2023, 13:35 | 11.6 | 11.6 mg/l |
| 3 Nov 2023, 08:21 | 10.4 | 10.4 mg/l |
| 4 Oct 2023, 16:06 | 8.13 | 8.13 mg/l |
Water temperature
code 0076 · °C
19.3 °C
Sampled 4 Sep 2026, 27 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:49 | 19.3 | 19.3 °C |
| 6 Aug 2026, 13:05 | 20.2 | 20.2 °C |
| 6 Jul 2026, 09:18 | 21.4 | 21.4 °C |
| 4 Jun 2026, 08:59 | 16.9 | 16.9 °C |
| 5 May 2026, 08:35 | 14.2 | 14.2 °C |
| 8 Apr 2026, 14:26 | 14.5 | 14.5 °C |
| 4 Mar 2026, 08:31 | 9.8 | 9.8 °C |
| 6 Feb 2026, 10:33 | 8 | 8 °C |
| 20 Jan 2026, 09:09 | 8.7 | 8.7 °C |
| 3 Dec 2025, 12:51 | 8.9 | 8.9 °C |
| 4 Nov 2025, 12:35 | 12.7 | 12.7 °C |
| 14 Oct 2025, 12:27 | 13.9 | 13.9 °C |
| 4 Sep 2025, 11:05 | 17 | 17 °C |
| 13 Aug 2025, 09:57 | 21 | 21 °C |
| 23 Jul 2025, 13:38 | 19.1 | 19.1 °C |
| 11 Jun 2025, 12:14 | 17 | 17 °C |
| 21 May 2025, 10:36 | 15.7 | 15.7 °C |
| 1 Apr 2025, 09:11 | 11.4 | 11.4 °C |
| 7 Mar 2025, 11:02 | 8.8 | 8.8 °C |
| 4 Feb 2025, 12:21 | 6.4 | 6.4 °C |
| 21 Jan 2025, 11:30 | 6.2 | 6.2 °C |
| 10 Dec 2024, 10:05 | 7.8 | 7.8 °C |
| 26 Nov 2024, 11:37 | 9.7 | 9.7 °C |
| 14 Oct 2024, 13:21 | 11.6 | 11.6 °C |
| 17 Sep 2024, 14:18 | 15.2 | 15.2 °C |
| 22 Aug 2024, 12:10 | 17 | 17 °C |
| 15 Jul 2024, 11:09 | 17.2 | 17.2 °C |
| 17 Jun 2024, 09:22 | 15.6 | 15.6 °C |
| 1 Mar 2024, 08:08 | 8.5 | 8.5 °C |
| 6 Feb 2024, 11:43 | 10.1 | 10.1 °C |
| 3 Jan 2024, 16:11 | 8.9 | 8.9 °C |
| 5 Dec 2023, 13:35 | 7 | 7 °C |
| 3 Nov 2023, 08:21 | 10.5 | 10.5 °C |
| 4 Oct 2023, 16:06 | 16 | 16 °C |
pH
code 0061
7.76
Sampled 4 Sep 2026, 27 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:49 | 7.76 | 7.76 |
| 6 Aug 2026, 13:05 | 8.03 | 8.03 |
| 6 Jul 2026, 09:18 | 7.91 | 7.91 |
| 4 Jun 2026, 08:59 | 7.9 | 7.9 |
| 5 May 2026, 08:35 | 7.95 | 7.95 |
| 8 Apr 2026, 14:26 | 8.19 | 8.19 |
| 4 Mar 2026, 08:31 | 7.84 | 7.84 |
| 6 Feb 2026, 10:33 | 7.9 | 7.9 |
| 20 Jan 2026, 09:09 | 7.72 | 7.72 |
| 3 Dec 2025, 12:51 | 7.82 | 7.82 |
| 4 Nov 2025, 12:35 | 7.67 | 7.67 |
| 14 Oct 2025, 12:27 | 7.67 | 7.67 |
| 4 Sep 2025, 11:05 | 7.85 | 7.85 |
| 13 Aug 2025, 09:57 | 7.82 | 7.82 |
| 23 Jul 2025, 13:38 | 7.9 | 7.9 |
| 11 Jun 2025, 12:14 | 7.87 | 7.87 |
| 21 May 2025, 10:36 | 7.82 | 7.82 |
| 1 Apr 2025, 09:11 | 7.94 | 7.94 |
| 7 Mar 2025, 11:02 | 7.92 | 7.92 |
| 4 Feb 2025, 12:21 | 7.91 | 7.91 |
| 21 Jan 2025, 11:30 | 7.89 | 7.89 |
| 10 Dec 2024, 10:05 | 7.6 | 7.6 |
| 26 Nov 2024, 11:37 | 7.72 | 7.72 |
| 14 Oct 2024, 13:21 | 7.66 | 7.66 |
| 17 Sep 2024, 14:18 | 7.8 | 7.8 |
| 22 Aug 2024, 12:10 | 7.85 | 7.85 |
| 15 Jul 2024, 11:09 | 7.85 | 7.85 |
| 17 Jun 2024, 09:22 | 7.81 | 7.81 |
| 1 Mar 2024, 08:08 | 7.84 | 7.84 |
| 6 Feb 2024, 11:43 | 8.04 | 8.04 |
| 3 Jan 2024, 16:11 | 7.95 | 7.95 |
| 5 Dec 2023, 13:35 | 7.94 | 7.94 |
| 3 Nov 2023, 08:21 | 7.83 | 7.83 |
| 4 Oct 2023, 16:06 | 7.69 | 7.69 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.052 mg/l
Sampled 4 Sep 2026, 27 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:49 | 0.052 | 0.052 mg/l |
| 6 Aug 2026, 13:05 | 0.033 | 0.033 mg/l |
| 6 Jul 2026, 09:18 | 0.049 | 0.049 mg/l |
| 4 Jun 2026, 08:59 | 0.063 | 0.063 mg/l |
| 5 May 2026, 08:35 | 0.069 | 0.069 mg/l |
| 8 Apr 2026, 14:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2026, 08:31 | 0.061 | 0.061 mg/l |
| 6 Feb 2026, 10:33 | 0.048 | 0.048 mg/l |
| 20 Jan 2026, 09:09 | 0.087 | 0.087 mg/l |
| 3 Dec 2025, 12:51 | 0.13 | 0.13 mg/l |
| 4 Nov 2025, 12:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Oct 2025, 12:27 | 0.067 | 0.067 mg/l |
| 4 Sep 2025, 11:05 | 0.038 | 0.038 mg/l |
| 13 Aug 2025, 09:57 | 0.032 | 0.032 mg/l |
| 23 Jul 2025, 13:38 | 0.054 | 0.054 mg/l |
| 11 Jun 2025, 12:14 | 0.033 | 0.033 mg/l |
| 21 May 2025, 10:36 | 0.045 | 0.045 mg/l |
| 7 Mar 2025, 11:02 | 0.06 | 0.06 mg/l |
| 4 Feb 2025, 12:21 | 0.052 | 0.052 mg/l |
| 21 Jan 2025, 11:30 | 0.11 | 0.11 mg/l |
| 10 Dec 2024, 10:05 | 0.047 | 0.047 mg/l |
| 26 Nov 2024, 11:37 | 0.06 | 0.06 mg/l |
| 14 Oct 2024, 13:21 | 0.042 | 0.042 mg/l |
| 17 Sep 2024, 14:18 | 0.031 | 0.031 mg/l |
| 22 Aug 2024, 12:10 | 0.035 | 0.035 mg/l |
| 15 Jul 2024, 11:09 | 0.055 | 0.055 mg/l |
| 17 Jun 2024, 09:22 | 0.051 | 0.051 mg/l |
| 1 Mar 2024, 08:08 | 0.14 | 0.14 mg/l |
| 6 Feb 2024, 11:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jan 2024, 16:11 | 0.055 | 0.055 mg/l |
| 5 Dec 2023, 13:35 | 0.045 | 0.045 mg/l |
| 3 Nov 2023, 08:21 | 0.038 | 0.038 mg/l |
| 4 Oct 2023, 16:06 | 0.04 | 0.04 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
11 mg/l
Sampled 4 Sep 2026, 27 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:49 | 11 | 11 mg/l |
| 6 Aug 2026, 13:05 | 11 | 11 mg/l |
| 6 Jul 2026, 09:18 | 12.9 | 12.9 mg/l |
| 4 Jun 2026, 08:59 | 9.96 | 9.96 mg/l |
| 5 May 2026, 08:35 | 11 | 11 mg/l |
| 8 Apr 2026, 14:26 | 7.69 | 7.69 mg/l |
| 4 Mar 2026, 08:31 | 9.35 | 9.35 mg/l |
| 6 Feb 2026, 10:33 | 11 | 11 mg/l |
| 20 Jan 2026, 09:09 | 12 | 12 mg/l |
| 3 Dec 2025, 12:51 | 11.9 | 11.9 mg/l |
| 4 Nov 2025, 12:35 | 14 | 14 mg/l |
| 14 Oct 2025, 12:27 | 15 | 15 mg/l |
| 4 Sep 2025, 11:05 | 12 | 12 mg/l |
| 13 Aug 2025, 09:57 | 13 | 13 mg/l |
| 23 Jul 2025, 13:38 | 9.56 | 9.56 mg/l |
| 11 Jun 2025, 12:14 | 12 | 12 mg/l |
| 21 May 2025, 10:36 | 13 | 13 mg/l |
| 7 Mar 2025, 11:02 | 9.94 | 9.94 mg/l |
| 4 Feb 2025, 12:21 | 9.37 | 9.37 mg/l |
| 21 Jan 2025, 11:30 | 9.97 | 9.97 mg/l |
| 10 Dec 2024, 10:05 | 9.97 | 9.97 mg/l |
| 26 Nov 2024, 11:37 | 9.97 | 9.97 mg/l |
| 14 Oct 2024, 13:21 | 11 | 11 mg/l |
| 17 Sep 2024, 14:18 | 11 | 11 mg/l |
| 22 Aug 2024, 12:10 | 11 | 11 mg/l |
| 15 Jul 2024, 11:09 | 8.47 | 8.47 mg/l |
| 17 Jun 2024, 09:22 | 11 | 11 mg/l |
| 1 Mar 2024, 08:08 | 9.37 | 9.37 mg/l |
| 3 Jan 2024, 16:11 | 7.18 | 7.18 mg/l |
| 5 Dec 2023, 13:35 | 9.88 | 9.88 mg/l |
| 3 Nov 2023, 08:21 | 9.58 | 9.58 mg/l |
| 4 Oct 2023, 16:06 | 9.27 | 9.27 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.32 mg/l
Sampled 4 Sep 2026, 27 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:49 | 0.32 | 0.32 mg/l |
| 6 Aug 2026, 13:05 | 0.25 | 0.25 mg/l |
| 6 Jul 2026, 09:18 | 0.38 | 0.38 mg/l |
| 4 Jun 2026, 08:59 | 0.28 | 0.28 mg/l |
| 5 May 2026, 08:35 | 0.24 | 0.24 mg/l |
| 8 Apr 2026, 14:26 | 0.074 | 0.074 mg/l |
| 4 Mar 2026, 08:31 | 0.12 | 0.12 mg/l |
| 6 Feb 2026, 10:33 | 0.13 | 0.13 mg/l |
| 20 Jan 2026, 09:09 | 0.14 | 0.14 mg/l |
| 3 Dec 2025, 12:51 | 0.18 | 0.18 mg/l |
| 4 Nov 2025, 12:35 | 0.25 | 0.25 mg/l |
| 14 Oct 2025, 12:27 | 0.24 | 0.24 mg/l |
| 4 Sep 2025, 11:05 | 0.3 | 0.3 mg/l |
| 13 Aug 2025, 09:57 | 0.29 | 0.29 mg/l |
| 23 Jul 2025, 13:38 | 0.28 | 0.28 mg/l |
| 11 Jun 2025, 12:14 | 0.3 | 0.3 mg/l |
| 21 May 2025, 10:36 | 0.22 | 0.22 mg/l |
| 7 Mar 2025, 11:02 | 0.091 | 0.091 mg/l |
| 4 Feb 2025, 12:21 | 0.11 | 0.11 mg/l |
| 21 Jan 2025, 11:30 | 0.12 | 0.12 mg/l |
| 10 Dec 2024, 10:05 | 0.17 | 0.17 mg/l |
| 26 Nov 2024, 11:37 | 0.17 | 0.17 mg/l |
| 14 Oct 2024, 13:21 | 0.22 | 0.22 mg/l |
| 17 Sep 2024, 14:18 | 0.26 | 0.26 mg/l |
| 22 Aug 2024, 12:10 | 0.23 | 0.23 mg/l |
| 15 Jul 2024, 11:09 | 0.3 | 0.3 mg/l |
| 17 Jun 2024, 09:22 | 0.26 | 0.26 mg/l |
| 1 Mar 2024, 08:08 | 0.16 | 0.16 mg/l |
| 6 Feb 2024, 11:43 | 0.16 | 0.16 mg/l |
| 3 Jan 2024, 16:11 | 0.14 | 0.14 mg/l |
| 5 Dec 2023, 13:35 | 0.16 | 0.16 mg/l |
| 3 Nov 2023, 08:21 | 0.16 | 0.16 mg/l |
| 4 Oct 2023, 16:06 | 0.24 | 0.24 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
896 µS/cm
Sampled 4 Sep 2026, 27 days ago · 34 results banked
Every result (34)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:49 | 896 | 896 µS/cm |
| 6 Aug 2026, 13:05 | 915 | 915 µS/cm |
| 6 Jul 2026, 09:18 | 915 | 915 µS/cm |
| 4 Jun 2026, 08:59 | 807 | 807 µS/cm |
| 5 May 2026, 08:35 | 853 | 853 µS/cm |
| 8 Apr 2026, 14:26 | 903 | 903 µS/cm |
| 4 Mar 2026, 08:31 | 786 | 786 µS/cm |
| 6 Feb 2026, 10:33 | 747 | 747 µS/cm |
| 20 Jan 2026, 09:09 | 864 | 864 µS/cm |
| 3 Dec 2025, 12:51 | 890 | 890 µS/cm |
| 4 Nov 2025, 12:35 | 870 | 870 µS/cm |
| 14 Oct 2025, 12:27 | 949 | 949 µS/cm |
| 4 Sep 2025, 11:05 | 842 | 842 µS/cm |
| 13 Aug 2025, 09:57 | 949 | 949 µS/cm |
| 23 Jul 2025, 13:38 | 789 | 789 µS/cm |
| 11 Jun 2025, 12:14 | 834 | 834 µS/cm |
| 21 May 2025, 10:36 | 864 | 864 µS/cm |
| 1 Apr 2025, 09:11 | 837 | 837 µS/cm |
| 7 Mar 2025, 11:02 | 827 | 827 µS/cm |
| 4 Feb 2025, 12:21 | 805 | 805 µS/cm |
| 21 Jan 2025, 11:30 | 834 | 834 µS/cm |
| 10 Dec 2024, 10:05 | 610 | 610 µS/cm |
| 26 Nov 2024, 11:37 | 711 | 711 µS/cm |
| 14 Oct 2024, 13:21 | 789 | 789 µS/cm |
| 17 Sep 2024, 14:18 | 828 | 828 µS/cm |
| 22 Aug 2024, 12:10 | 854 | 854 µS/cm |
| 15 Jul 2024, 11:09 | 778 | 778 µS/cm |
| 17 Jun 2024, 09:22 | 817 | 817 µS/cm |
| 1 Mar 2024, 08:08 | 780 | 780 µS/cm |
| 6 Feb 2024, 11:43 | 846 | 846 µS/cm |
| 3 Jan 2024, 16:11 | 525 | 525 µS/cm |
| 5 Dec 2023, 13:35 | 817 | 817 µS/cm |
| 3 Nov 2023, 08:21 | 565 | 565 µS/cm |
| 4 Oct 2023, 16:06 | 798 | 798 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 – Sep 2026 | 83.3% 4 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 34 | Oct 2023 – Sep 2026 | 7.66 mg/l 4 Sep 2026 |
| Temperature of Water 0076 | River water | 34 | Oct 2023 – Sep 2026 | 19.3 °C 4 Sep 2026 |
| pH 0061 | River water | 34 | Oct 2023 – Sep 2026 | 7.76 4 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 33 | Oct 2023 – Sep 2026 | 0.052 mg/l 4 Sep 2026 |
| Nitrate as N 0117 | River water | 32 | Oct 2023 – Sep 2026 | 11 mg/l 4 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 33 | Oct 2023 – Sep 2026 | 0.32 mg/l 4 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 34 | Oct 2023 – Sep 2026 | 896 µS/cm 4 Sep 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Nov 2023 – Mar 2024 | below 0.001 µg/l 1 Mar 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Nov 2023 – Mar 2024 | below 0.001 µg/l 1 Mar 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Nov 2023 – Mar 2024 | below 0.001 µg/l 1 Mar 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Nov 2023 – Mar 2024 | below 0.002 µg/l 1 Mar 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Nov 2023 – Mar 2024 | below 0.0005 µg/l 1 Mar 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Nov 2023 – Mar 2024 | below 0.001 µg/l 1 Mar 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Nov 2023 – Mar 2024 | below 0.0005 µg/l 1 Mar 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Nov 2023 – Mar 2024 | below 0.004 µg/l 1 Mar 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Nov 2023 – Mar 2024 | below 0.005 µg/l 1 Mar 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Nov 2023 – Mar 2024 | below 0.0005 µg/l 1 Mar 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Nov 2023 – Mar 2024 | below 0.001 µg/l 1 Mar 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Nov 2023 – Mar 2024 | below 0.001 µg/l 1 Mar 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Nov 2023 – Mar 2024 | below 0.0005 µg/l 1 Mar 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 32 | Oct 2023 – Sep 2026 | 210 mg/l 4 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 33 | Oct 2023 – Sep 2026 | 0.00109 mg/l 4 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – May 2026 | 1.6 mg/l 5 May 2026 |
| Calcium, Dissolved 0239 | River water | 2 | Nov 2023 – Feb 2024 | 130 mg/l 6 Feb 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 2 | Nov 2023 – Feb 2024 | 2.7 mg/l 6 Feb 2024 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Nov 2023 – Mar 2024 | below 0.001 µg/l 1 Mar 2024 |
| Lead : BLM Bioavailable 3377 | River water | 2 | Nov 2023 – Feb 2024 | 0.04 µg/l 6 Feb 2024 |
| Lead, Dissolved 0052 | River water | 2 | Nov 2023 – Feb 2024 | 0.11 µg/l 6 Feb 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Nov 2023 – Mar 2024 | below 0.002 µg/l 1 Mar 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Nov 2023 – Mar 2024 | below 0.002 µg/l 1 Mar 2024 |
| Nickel : BLM Bioavailable 3878 | River water | 2 | Nov 2023 – Feb 2024 | 1.5 µg/l 6 Feb 2024 |
| Nickel, Dissolved 3410 | River water | 2 | Nov 2023 – Feb 2024 | 2.7 µg/l 6 Feb 2024 |
| Nitrite as N 0118 | River water | 33 | Oct 2023 – Sep 2026 | 0.048 mg/l 4 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 32 | Oct 2023 – Sep 2026 | 11 mg/l 4 Sep 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Nov 2023 – Mar 2024 | below 0.0005 µg/l 1 Mar 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Nov 2023 – Mar 2024 | below 0.0005 µg/l 1 Mar 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Nov 2023 – Mar 2024 | below 0.0005 µg/l 1 Mar 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Nov 2023 – Mar 2024 | below 0.0005 µg/l 1 Mar 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Nov 2023 – Mar 2024 | 0.00086 µg/l 1 Mar 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Nov 2023 – Mar 2024 | 0.0054 µg/l 1 Mar 2024 |
| Perfluorobutanoic acid 2995 | River water | 2 | Nov 2023 – Mar 2024 | 0.0039 µg/l 1 Mar 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Nov 2023 – Mar 2024 | 0.00062 µg/l 1 Mar 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Nov 2023 – Mar 2024 | below 0.002 µg/l 1 Mar 2024 |
| Perfluorodecanoic acid 8892 | River water | 2 | Nov 2023 – Mar 2024 | below 0.002 µg/l 1 Mar 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Nov 2023 – Mar 2024 | below 0.005 µg/l 1 Mar 2024 |
| Perfluorododecanoic acid 8894 | River water | 2 | Nov 2023 – Mar 2024 | below 0.002 µg/l 1 Mar 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Nov 2023 – Mar 2024 | below 0.0005 µg/l 1 Mar 2024 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Nov 2023 – Mar 2024 | 0.0018 µg/l 1 Mar 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Nov 2023 – Mar 2024 | below 0.0005 µg/l 1 Mar 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Nov 2023 – Mar 2024 | 0.00076 µg/l 1 Mar 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Nov 2023 – Mar 2024 | 0.003 µg/l 1 Mar 2024 |
| Perfluorohexanoic acid 8888 | River water | 2 | Nov 2023 – Mar 2024 | 0.0038 µg/l 1 Mar 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Nov 2023 – Mar 2024 | below 0.0005 µg/l 1 Mar 2024 |
| Perfluorononanoic acid 8891 | River water | 2 | Nov 2023 – Mar 2024 | below 0.001 µg/l 1 Mar 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Nov 2023 – Mar 2024 | below 0.002 µg/l 1 Mar 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Nov 2023 – Mar 2024 | below 0.001 µg/l 1 Mar 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Nov 2023 – Mar 2024 | 0.0023 µg/l 1 Mar 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Nov 2023 – Mar 2024 | 0.0028 µg/l 1 Mar 2024 |
| Perfluorooctanoic acid 8890 | River water | 2 | Nov 2023 – Mar 2024 | 0.0022 µg/l 1 Mar 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Nov 2023 – Mar 2024 | below 0.0005 µg/l 1 Mar 2024 |
| Perfluoropentanoic acid 8887 | River water | 2 | Nov 2023 – Mar 2024 | 0.0043 µg/l 1 Mar 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Nov 2023 – Mar 2024 | below 0.006 µg/l 1 Mar 2024 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Nov 2023 – Mar 2024 | below 0.005 µg/l 1 Mar 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Nov 2023 – Mar 2024 | below 0.004 µg/l 1 Mar 2024 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Nov 2023 – Mar 2024 | below 0.002 µg/l 1 Mar 2024 |
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.