Lee at Waterhall
EA name: LEE AT WATERHALL
Environment Agency sampling point TH-PLER0076 · 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
- 6 Aug 2026, 15:0256 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 35 since 3 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 529900, 209900As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Lee
- River, by the map
- River LeaPlaced on the river its name gives, 43 m from the line.
- Next gauge downstream
- Tumbling Bay Weir On the Amwell Loop · 9.9 km along the riverBeside Waterhall: too close to say above or below.
- Nearest gauge upstream
- Harpenden On the River Lee · 23 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (33 samples)
Planned investigation (local monitoring) (2 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
101.1%
Sampled 6 Aug 2026, 56 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Aug 2026, 15:02 | 101.1 | 101.1% |
| 9 Jul 2026, 13:40 | 98.6 | 98.6% |
| 3 Jun 2026, 14:21 | 83.2 | 83.2% |
| 19 May 2026, 13:39 | 93.8 | 93.8% |
| 8 Apr 2026, 11:45 | 119.9 | 119.9% |
| 2 Mar 2026, 09:58 | 95.8 | 95.8% |
| 4 Feb 2026, 13:38 | 95.2 | 95.2% |
| 12 Jan 2026, 14:44 | 96.1 | 96.1% |
| 4 Dec 2025, 14:52 | 90 | 90% |
| 5 Nov 2025, 13:02 | 90.4 | 90.4% |
| 9 Oct 2025, 14:15 | 93 | 93% |
| 24 Sep 2025, 12:29 | 91.7 | 91.7% |
| 8 Aug 2025, 13:47 | 97.7 | 97.7% |
| 9 Jul 2025, 14:10 | 94 | 94% |
| 17 Jun 2025, 11:55 | 100.6 | 100.6% |
| 8 May 2025, 11:50 | 102.2 | 102.2% |
| 23 Apr 2025, 15:04 | 97.1 | 97.1% |
| 10 Mar 2025, 14:31 | 99.1 | 99.1% |
| 4 Feb 2025, 14:52 | 96 | 96% |
| 21 Jan 2025, 13:45 | 94.3 | 94.3% |
| 12 Dec 2024, 12:49 | 92.7 | 92.7% |
| 20 Nov 2024, 09:58 | 92.4 | 92.4% |
| 16 Oct 2024, 14:48 | 91.5 | 91.5% |
| 23 Sep 2024, 13:58 | 84.9 | 84.9% |
| 22 Aug 2024, 13:15 | 93.3 | 93.3% |
| 18 Jul 2024, 15:42 | 95.6 | 95.6% |
| 18 Jun 2024, 12:51 | 99.4 | 99.4% |
| 1 Mar 2024, 11:55 | 93.6 | 93.6% |
| 2 Feb 2024, 11:25 | 95.1 | 95.1% |
| 10 Jan 2024, 10:44 | 93.2 | 93.2% |
| 5 Dec 2023, 08:33 | 91.8 | 91.8% |
| 1 Nov 2023, 13:57 | 88.6 | 88.6% |
| 3 Oct 2023, 09:23 | 79.9 | 79.9% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.52 mg/l
Sampled 6 Aug 2026, 56 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Aug 2026, 15:02 | 9.52 | 9.52 mg/l |
| 9 Jul 2026, 13:40 | 8.38 | 8.38 mg/l |
| 3 Jun 2026, 14:21 | 8.11 | 8.11 mg/l |
| 19 May 2026, 13:39 | 9.61 | 9.61 mg/l |
| 8 Apr 2026, 11:45 | 12.7 | 12.7 mg/l |
| 2 Mar 2026, 09:58 | 10.6 | 10.6 mg/l |
| 4 Feb 2026, 13:38 | 10.9 | 10.9 mg/l |
| 12 Jan 2026, 14:44 | 11.5 | 11.5 mg/l |
| 4 Dec 2025, 14:52 | 10.6 | 10.6 mg/l |
| 5 Nov 2025, 13:02 | 9.43 | 9.43 mg/l |
| 9 Oct 2025, 14:15 | 9.81 | 9.81 mg/l |
| 24 Sep 2025, 12:29 | 9.66 | 9.66 mg/l |
| 8 Aug 2025, 13:47 | 9.09 | 9.09 mg/l |
| 9 Jul 2025, 14:10 | 8.66 | 8.66 mg/l |
| 17 Jun 2025, 11:55 | 9.23 | 9.23 mg/l |
| 8 May 2025, 11:50 | 10.7 | 10.7 mg/l |
| 23 Apr 2025, 15:04 | 10.3 | 10.3 mg/l |
| 10 Mar 2025, 14:31 | 11.1 | 11.1 mg/l |
| 4 Feb 2025, 14:52 | 11.3 | 11.3 mg/l |
| 21 Jan 2025, 13:45 | 11.5 | 11.5 mg/l |
| 12 Dec 2024, 12:49 | 10.9 | 10.9 mg/l |
| 20 Nov 2024, 09:58 | 11.3 | 11.3 mg/l |
| 16 Oct 2024, 14:48 | 9.38 | 9.38 mg/l |
| 23 Sep 2024, 13:58 | 8.14 | 8.14 mg/l |
| 22 Aug 2024, 13:15 | 9.14 | 9.14 mg/l |
| 18 Jul 2024, 15:42 | 8.79 | 8.79 mg/l |
| 18 Jun 2024, 12:51 | 9.6 | 9.6 mg/l |
| 1 Mar 2024, 11:55 | 10.8 | 10.8 mg/l |
| 2 Feb 2024, 11:25 | 10.9 | 10.9 mg/l |
| 10 Jan 2024, 10:44 | 12 | 12 mg/l |
| 5 Dec 2023, 08:33 | 11.1 | 11.1 mg/l |
| 1 Nov 2023, 13:57 | 9.59 | 9.59 mg/l |
| 3 Oct 2023, 09:23 | 7.99 | 7.99 mg/l |
Water temperature
code 0076 · °C
18.1 °C
Sampled 6 Aug 2026, 56 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Aug 2026, 15:02 | 18.1 | 18.1 °C |
| 9 Jul 2026, 13:40 | 23.3 | 23.3 °C |
| 3 Jun 2026, 14:21 | 16.4 | 16.4 °C |
| 19 May 2026, 13:39 | 14.1 | 14.1 °C |
| 8 Apr 2026, 11:45 | 12.8 | 12.8 °C |
| 2 Mar 2026, 09:58 | 10.8 | 10.8 °C |
| 4 Feb 2026, 13:38 | 9.2 | 9.2 °C |
| 12 Jan 2026, 14:44 | 7.5 | 7.5 °C |
| 4 Dec 2025, 14:52 | 8.1 | 8.1 °C |
| 5 Nov 2025, 13:02 | 13.3 | 13.3 °C |
| 9 Oct 2025, 14:15 | 12.8 | 12.8 °C |
| 24 Sep 2025, 12:29 | 12.9 | 12.9 °C |
| 8 Aug 2025, 13:47 | 18.7 | 18.7 °C |
| 9 Jul 2025, 14:10 | 19.2 | 19.2 °C |
| 17 Jun 2025, 11:55 | 19.4 | 19.4 °C |
| 8 May 2025, 11:50 | 13.1 | 13.1 °C |
| 23 Apr 2025, 15:04 | 12.4 | 12.4 °C |
| 10 Mar 2025, 14:31 | 10.2 | 10.2 °C |
| 4 Feb 2025, 14:52 | 8.1 | 8.1 °C |
| 21 Jan 2025, 13:45 | 6.9 | 6.9 °C |
| 12 Dec 2024, 12:49 | 8.3 | 8.3 °C |
| 20 Nov 2024, 09:58 | 6.7 | 6.7 °C |
| 16 Oct 2024, 14:48 | 14.1 | 14.1 °C |
| 23 Sep 2024, 13:58 | 17.2 | 17.2 °C |
| 22 Aug 2024, 13:15 | 16.2 | 16.2 °C |
| 18 Jul 2024, 15:42 | 19.3 | 19.3 °C |
| 18 Jun 2024, 12:51 | 16.9 | 16.9 °C |
| 1 Mar 2024, 11:55 | 8.8 | 8.8 °C |
| 2 Feb 2024, 11:25 | 9.1 | 9.1 °C |
| 10 Jan 2024, 10:44 | 4.5 | 4.5 °C |
| 5 Dec 2023, 08:33 | 7.1 | 7.1 °C |
| 1 Nov 2023, 13:57 | 11.7 | 11.7 °C |
| 3 Oct 2023, 09:23 | 15.2 | 15.2 °C |
pH
code 0061
8.01
Sampled 6 Aug 2026, 56 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Aug 2026, 15:02 | 8.01 | 8.01 |
| 9 Jul 2026, 13:40 | 7.79 | 7.79 |
| 3 Jun 2026, 14:21 | 7.72 | 7.72 |
| 19 May 2026, 13:39 | 8.09 | 8.09 |
| 8 Apr 2026, 11:45 | 8.13 | 8.13 |
| 2 Mar 2026, 09:58 | 8.1 | 8.1 |
| 4 Feb 2026, 13:38 | 8.01 | 8.01 |
| 12 Jan 2026, 14:44 | 8 | 8 |
| 4 Dec 2025, 14:52 | 7.79 | 7.79 |
| 5 Nov 2025, 13:02 | 7.77 | 7.77 |
| 9 Oct 2025, 14:15 | 7.81 | 7.81 |
| 24 Sep 2025, 12:29 | 7.93 | 7.93 |
| 8 Aug 2025, 13:47 | 7.99 | 7.99 |
| 9 Jul 2025, 14:10 | 7.93 | 7.93 |
| 17 Jun 2025, 11:55 | 7.93 | 7.93 |
| 8 May 2025, 11:50 | 7.97 | 7.97 |
| 23 Apr 2025, 15:04 | 7.98 | 7.98 |
| 10 Mar 2025, 14:31 | 7.9 | 7.9 |
| 4 Feb 2025, 14:52 | 7.36 | 7.36 |
| 21 Jan 2025, 13:45 | 7.81 | 7.81 |
| 12 Dec 2024, 12:49 | 7.78 | 7.78 |
| 20 Nov 2024, 09:58 | 7.89 | 7.89 |
| 16 Oct 2024, 14:48 | 7.8 | 7.8 |
| 23 Sep 2024, 13:58 | 7.62 | 7.62 |
| 22 Aug 2024, 13:15 | 7.8 | 7.8 |
| 18 Jul 2024, 15:42 | 7.84 | 7.84 |
| 18 Jun 2024, 12:51 | 7.95 | 7.95 |
| 1 Mar 2024, 11:55 | 7.69 | 7.69 |
| 2 Feb 2024, 11:25 | 7.86 | 7.86 |
| 10 Jan 2024, 10:44 | 7.92 | 7.92 |
| 5 Dec 2023, 08:33 | 7.72 | 7.72 |
| 1 Nov 2023, 13:57 | 7.63 | 7.63 |
| 3 Oct 2023, 09:23 | 7.65 | 7.65 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 6 Aug 2026, 56 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Aug 2026, 15:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jul 2026, 13:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jun 2026, 14:21 | 0.036 | 0.036 mg/l |
| 19 May 2026, 13:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Apr 2026, 11:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Mar 2026, 09:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2026, 13:38 | 0.07 | 0.07 mg/l |
| 12 Jan 2026, 14:44 | 0.063 | 0.063 mg/l |
| 4 Dec 2025, 14:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Nov 2025, 13:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Oct 2025, 14:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Sep 2025, 12:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Aug 2025, 13:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jul 2025, 14:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jun 2025, 11:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 May 2025, 11:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Apr 2025, 15:04 | 0.062 | 0.062 mg/l |
| 10 Mar 2025, 14:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2025, 14:52 | 0.048 | 0.048 mg/l |
| 21 Jan 2025, 13:45 | 0.06 | 0.06 mg/l |
| 12 Dec 2024, 12:49 | 0.047 | 0.047 mg/l |
| 20 Nov 2024, 09:58 | 0.073 | 0.073 mg/l |
| 16 Oct 2024, 14:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Sep 2024, 13:58 | 0.17 | 0.17 mg/l |
| 22 Aug 2024, 13:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jul 2024, 15:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jun 2024, 12:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Mar 2024, 11:55 | 0.16 | 0.16 mg/l |
| 2 Feb 2024, 11:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Jan 2024, 10:44 | 0.093 | 0.093 mg/l |
| 5 Dec 2023, 08:33 | 0.14 | 0.14 mg/l |
| 1 Nov 2023, 13:57 | 0.032 | 0.032 mg/l |
| 3 Oct 2023, 09:23 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
11 mg/l
Sampled 6 Aug 2026, 56 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Aug 2026, 15:02 | 11 | 11 mg/l |
| 9 Jul 2026, 13:40 | 9.88 | 9.88 mg/l |
| 3 Jun 2026, 14:21 | 7.96 | 7.96 mg/l |
| 19 May 2026, 13:39 | 12 | 12 mg/l |
| 8 Apr 2026, 11:45 | 11 | 11 mg/l |
| 2 Mar 2026, 09:58 | 7.78 | 7.78 mg/l |
| 4 Feb 2026, 13:38 | 7.95 | 7.95 mg/l |
| 12 Jan 2026, 14:44 | 11.9 | 11.9 mg/l |
| 4 Dec 2025, 14:52 | 13 | 13 mg/l |
| 5 Nov 2025, 13:02 | 14.9 | 14.9 mg/l |
| 9 Oct 2025, 14:15 | 13 | 13 mg/l |
| 24 Sep 2025, 12:29 | 16 | 16 mg/l |
| 8 Aug 2025, 13:47 | 13 | 13 mg/l |
| 9 Jul 2025, 14:10 | 9.98 | 9.98 mg/l |
| 17 Jun 2025, 11:55 | 9.18 | 9.18 mg/l |
| 8 May 2025, 11:50 | 13 | 13 mg/l |
| 23 Apr 2025, 15:04 | 10.9 | 10.9 mg/l |
| 10 Mar 2025, 14:31 | 9.95 | 9.95 mg/l |
| 4 Feb 2025, 14:52 | 10.9 | 10.9 mg/l |
| 21 Jan 2025, 13:45 | 12.9 | 12.9 mg/l |
| 12 Dec 2024, 12:49 | 9.46 | 9.46 mg/l |
| 20 Nov 2024, 09:58 | 8.86 | 8.86 mg/l |
| 16 Oct 2024, 14:48 | 8.48 | 8.48 mg/l |
| 23 Sep 2024, 13:58 | 8.36 | 8.36 mg/l |
| 22 Aug 2024, 13:15 | 8.59 | 8.59 mg/l |
| 18 Jul 2024, 15:42 | 6.38 | 6.38 mg/l |
| 18 Jun 2024, 12:51 | 7.98 | 7.98 mg/l |
| 1 Mar 2024, 11:55 | 7.77 | 7.77 mg/l |
| 2 Feb 2024, 11:25 | 11 | 11 mg/l |
| 10 Jan 2024, 10:44 | 9.96 | 9.96 mg/l |
| 5 Dec 2023, 08:33 | 10.9 | 10.9 mg/l |
| 1 Nov 2023, 13:57 | 7.17 | 7.17 mg/l |
| 3 Oct 2023, 09:23 | 11 | 11 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.19 mg/l
Sampled 6 Aug 2026, 56 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Aug 2026, 15:02 | 0.19 | 0.19 mg/l |
| 9 Jul 2026, 13:40 | 0.38 | 0.38 mg/l |
| 3 Jun 2026, 14:21 | 0.28 | 0.28 mg/l |
| 19 May 2026, 13:39 | 0.22 | 0.22 mg/l |
| 8 Apr 2026, 11:45 | 0.16 | 0.16 mg/l |
| 2 Mar 2026, 09:58 | 0.15 | 0.15 mg/l |
| 4 Feb 2026, 13:38 | 0.17 | 0.17 mg/l |
| 12 Jan 2026, 14:44 | 0.16 | 0.16 mg/l |
| 4 Dec 2025, 14:52 | 0.31 | 0.31 mg/l |
| 5 Nov 2025, 13:02 | 0.24 | 0.24 mg/l |
| 9 Oct 2025, 14:15 | 0.21 | 0.21 mg/l |
| 24 Sep 2025, 12:29 | 0.23 | 0.23 mg/l |
| 8 Aug 2025, 13:47 | 0.22 | 0.22 mg/l |
| 9 Jul 2025, 14:10 | 0.21 | 0.21 mg/l |
| 17 Jun 2025, 11:55 | 0.19 | 0.19 mg/l |
| 8 May 2025, 11:50 | 0.11 | 0.11 mg/l |
| 23 Apr 2025, 15:04 | 0.13 | 0.13 mg/l |
| 10 Mar 2025, 14:31 | 0.16 | 0.16 mg/l |
| 4 Feb 2025, 14:52 | 0.17 | 0.17 mg/l |
| 21 Jan 2025, 13:45 | 0.19 | 0.19 mg/l |
| 12 Dec 2024, 12:49 | 0.15 | 0.15 mg/l |
| 20 Nov 2024, 09:58 | 0.37 | 0.37 mg/l |
| 16 Oct 2024, 14:48 | 0.21 | 0.21 mg/l |
| 23 Sep 2024, 13:58 | 0.32 | 0.32 mg/l |
| 22 Aug 2024, 13:15 | 0.25 | 0.25 mg/l |
| 18 Jul 2024, 15:42 | 0.27 | 0.27 mg/l |
| 18 Jun 2024, 12:51 | 0.21 | 0.21 mg/l |
| 1 Mar 2024, 11:55 | 0.15 | 0.15 mg/l |
| 2 Feb 2024, 11:25 | 0.17 | 0.17 mg/l |
| 10 Jan 2024, 10:44 | 0.17 | 0.17 mg/l |
| 5 Dec 2023, 08:33 | 0.19 | 0.19 mg/l |
| 1 Nov 2023, 13:57 | 0.17 | 0.17 mg/l |
| 3 Oct 2023, 09:23 | 0.26 | 0.26 mg/l |
Turbidity
code 6396 · NTU
2.5 NTU
Sampled 6 Aug 2026, 56 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Aug 2026, 15:02 | 2.5 | 2.5 NTU |
| 9 Jul 2026, 13:40 | 2.2 | 2.2 NTU |
| 3 Jun 2026, 14:21 | 4.4 | 4.4 NTU |
| 19 May 2026, 13:39 | 3.6 | 3.6 NTU |
| 8 Apr 2026, 11:45 | 2.1 | 2.1 NTU |
| 2 Mar 2026, 09:58 | 5.1 | 5.1 NTU |
| 4 Feb 2026, 13:38 | 11 | 11 NTU |
| 12 Jan 2026, 14:44 | 6 | 6 NTU |
| 4 Dec 2025, 14:52 | 7.1 | 7.1 NTU |
| 5 Nov 2025, 13:02 | 3.3 | 3.3 NTU |
| 9 Oct 2025, 14:15 | 2.6 | 2.6 NTU |
| 23 Apr 2025, 15:04 | 6.8 | 6.8 NTU |
| 10 Mar 2025, 14:31 | 2.4 | 2.4 NTU |
| 4 Feb 2025, 14:52 | 3.7 | 3.7 NTU |
| 21 Jan 2025, 13:45 | 4.4 | 4.4 NTU |
| 12 Dec 2024, 12:49 | 5.1 | 5.1 NTU |
| 20 Nov 2024, 09:58 | 4.7 | 4.7 NTU |
| 16 Oct 2024, 14:48 | 4.4 | 4.4 NTU |
| 23 Sep 2024, 13:58 | 20 | 20 NTU |
| 22 Aug 2024, 13:15 | 2.1 | 2.1 NTU |
| 18 Jul 2024, 15:42 | 5.2 | 5.2 NTU |
| 18 Jun 2024, 12:51 | 4 | 4 NTU |
| 1 Mar 2024, 11:55 | 57 | 57 NTU |
| 2 Feb 2024, 11:25 | <1 | below 1 NTU (not detected above this) |
| 10 Jan 2024, 10:44 | 5.1 | 5.1 NTU |
| 5 Dec 2023, 08:33 | 9.4 | 9.4 NTU |
| 1 Nov 2023, 13:57 | 3.9 | 3.9 NTU |
| 3 Oct 2023, 09:23 | 2.7 | 2.7 NTU |
Conductivity
at 25 °C · code 0077 · µS/cm
986 µS/cm
Sampled 6 Aug 2026, 56 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Aug 2026, 15:02 | 986 | 986 µS/cm |
| 9 Jul 2026, 13:40 | 978 | 978 µS/cm |
| 3 Jun 2026, 14:21 | 860 | 860 µS/cm |
| 19 May 2026, 13:39 | 913 | 913 µS/cm |
| 8 Apr 2026, 11:45 | 904 | 904 µS/cm |
| 2 Mar 2026, 09:58 | 850 | 850 µS/cm |
| 4 Feb 2026, 13:38 | 782 | 782 µS/cm |
| 12 Jan 2026, 14:44 | 964 | 964 µS/cm |
| 4 Dec 2025, 14:52 | 936 | 936 µS/cm |
| 5 Nov 2025, 13:02 | 1005 | 1005 µS/cm |
| 9 Oct 2025, 14:15 | 947 | 947 µS/cm |
| 24 Sep 2025, 12:29 | 1010 | 1010 µS/cm |
| 8 Aug 2025, 13:47 | 957 | 957 µS/cm |
| 9 Jul 2025, 14:10 | 959 | 959 µS/cm |
| 17 Jun 2025, 11:55 | 942 | 942 µS/cm |
| 8 May 2025, 11:50 | 930 | 930 µS/cm |
| 23 Apr 2025, 15:04 | 835 | 835 µS/cm |
| 10 Mar 2025, 14:31 | 894 | 894 µS/cm |
| 4 Feb 2025, 14:52 | 880 | 880 µS/cm |
| 21 Jan 2025, 13:45 | 910 | 910 µS/cm |
| 12 Dec 2024, 12:49 | 759 | 759 µS/cm |
| 20 Nov 2024, 09:58 | 869 | 869 µS/cm |
| 16 Oct 2024, 14:48 | 799 | 799 µS/cm |
| 23 Sep 2024, 13:58 | 763 | 763 µS/cm |
| 22 Aug 2024, 13:15 | 914 | 914 µS/cm |
| 18 Jul 2024, 15:42 | 743 | 743 µS/cm |
| 18 Jun 2024, 12:51 | 834 | 834 µS/cm |
| 1 Mar 2024, 11:55 | 746 | 746 µS/cm |
| 2 Feb 2024, 11:25 | 920 | 920 µS/cm |
| 10 Jan 2024, 10:44 | 786 | 786 µS/cm |
| 5 Dec 2023, 08:33 | 912 | 912 µS/cm |
| 1 Nov 2023, 13:57 | 721 | 721 µS/cm |
| 3 Oct 2023, 09:23 | 885 | 885 µS/cm |
Everything measured here
129 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 129 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 33 | Oct 2023 – Aug 2026 | 101.1% 6 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 33 | Oct 2023 – Aug 2026 | 9.52 mg/l 6 Aug 2026 |
| Temperature of Water 0076 | River water | 33 | Oct 2023 – Aug 2026 | 18.1 °C 6 Aug 2026 |
| pH 0061 | River water | 33 | Oct 2023 – Aug 2026 | 8.01 6 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 33 | Oct 2023 – Aug 2026 | below 0.03 mg/l 6 Aug 2026 |
| Nitrate as N 0117 | River water | 33 | Oct 2023 – Aug 2026 | 11 mg/l 6 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 33 | Oct 2023 – Aug 2026 | 0.19 mg/l 6 Aug 2026 |
| Turbidity 6396 | River water | 28 | Oct 2023 – Aug 2026 | 2.5 NTU 6 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 33 | Oct 2023 – Aug 2026 | 986 µS/cm 6 Aug 2026 |
| 1,1,1,2-Tetrachloroethane 6534 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| 1,1,1-Trichloroethane 3268 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| 1,1,2,2-Tetrachloroethane 7531 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| 1,1,2-Trichloroethane 9811 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| 1,1-Dichloroethane 3269 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| 1,1-Dichloroethylene :- {1,1-Dichloroethene} 9836 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| 1,2-Dichloroethane 3272 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| 1,2-Dimethylbenzene :- {o-Xylene} 9845 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Jun 2024 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Jun 2024 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Jun 2024 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Jun 2024 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Jun 2024 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Jun 2024 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Jun 2024 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Jun 2024 – Sep 2024 | below 0.004 µg/l 23 Sep 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Jun 2024 – Sep 2024 | below 0.005 µg/l 23 Sep 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Jun 2024 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Jun 2024 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Jun 2024 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Jun 2024 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Acenaphthene 7395 | River water | 27 | Apr 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| Acenaphthylene 8311 | River water | 27 | Apr 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 33 | Oct 2023 – Aug 2026 | 210 mg/l 6 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 33 | Oct 2023 – Aug 2026 | below 0.00099 mg/l 6 Aug 2026 |
| Anthracene 6753 | River water | 27 | Apr 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| Arsenic, Dissolved 6045 | River water | 33 | Oct 2023 – Aug 2026 | below 1 µg/l 6 Aug 2026 |
| Benzene 3781 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| Benzo(a)Anthracene 0772 | River water | 25 | Apr 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| Benzo(a)Pyrene 6399 | River water | 27 | Apr 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| Benzo(b)Fluoranthene 0731 | River water | 26 | Apr 2024 – Jul 2026 | 0.012 µg/l 9 Jul 2026 |
| Benzo(e)Pyrene 8940 | River water | 26 | May 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| Benzo(g,h,i)Perylene 0714 | River water | 27 | Apr 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| Benzo(k)Fluoranthene 0733 | River water | 27 | Apr 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| BOD : 5 Day ATU 0085 | River water | 24 | Jun 2024 – May 2026 | 2 mg/l 19 May 2026 |
| Boron, Dissolved 9447 | River water | 33 | Oct 2023 – Aug 2026 | 110 µg/l 6 Aug 2026 |
| Bromodichloromethane 3282 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| Bromoform :- {Tribromomethane} 3283 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| Cadmium, Dissolved 0106 | River water | 33 | Oct 2023 – Aug 2026 | 0.014 µg/l 6 Aug 2026 |
| Carbon tetrachloride :- {Tetrachloromethane} 1049 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 21 | Jul 2024 – Aug 2026 | 3.7 mg/l 6 Aug 2026 |
| Chloride 0172 | River water | 28 | Oct 2023 – Aug 2026 | 110 mg/l 6 Aug 2026 |
| Chlorobenzene 3290 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| Chlorodibromomethane 3292 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| Chloroform :- {Trichloromethane} 3373 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| Chlorophyll : Acetone Extract 7887 | River water | 32 | Oct 2023 – Aug 2026 | 4.7 µg/l 6 Aug 2026 |
| Chromium, Dissolved 3409 | River water | 33 | Oct 2023 – Aug 2026 | below 0.5 µg/l 6 Aug 2026 |
| Chrysene 8310 | River water | 27 | Apr 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| cis-1,2-Dichloroethylene :- {cis-1,2-Dichloroethene} 6538 | River water | 24 | Apr 2024 – Aug 2026 | below 0.5 µg/l 6 Aug 2026 |
| Copper, Dissolved 6450 | River water | 33 | Oct 2023 – Aug 2026 | 2 µg/l 6 Aug 2026 |
| Di(2-ethylhexyl) phthalate :- {DEHP} 6724 | River water | 29 | Apr 2024 – Aug 2026 | below 0.2 µg/l 6 Aug 2026 |
| Dibenzo(a,h)Anthracene 8360 | River water | 27 | Apr 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| Dimethylbenzene : Sum of isomers (1,3- 1,4-) 6716 | River water | 24 | Apr 2024 – Aug 2026 | below 0.2 µg/l 6 Aug 2026 |
| Ethyl tert-butyl ether :- {ETBE} 9844 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| Ethylbenzene 4117 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| Fluoranthene 0736 | River water | 27 | Apr 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| Fluorene 7864 | River water | 27 | Apr 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Jun 2024 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| Indeno(1,2,3-cd)pyrene 0746 | River water | 27 | Apr 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| Iron, Dissolved 6460 | River water | 33 | Oct 2023 – Aug 2026 | below 30 µg/l 6 Aug 2026 |
| Lead, Dissolved 0052 | River water | 33 | Oct 2023 – Aug 2026 | 0.11 µg/l 6 Aug 2026 |
| Manganese, Dissolved 6458 | River water | 33 | Oct 2023 – Aug 2026 | below 10 µg/l 6 Aug 2026 |
| Mercury, Dissolved 0103 | River water | 33 | Oct 2023 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| MTBE :- {Methyl tert-butyl ether} 6656 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Jun 2024 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Jun 2024 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| Naphthalene 9669 | River water | 26 | Apr 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| Nickel, Dissolved 3410 | River water | 33 | Oct 2023 – Aug 2026 | 3.7 µg/l 6 Aug 2026 |
| Nitrite as N 0118 | River water | 33 | Oct 2023 – Aug 2026 | 0.012 mg/l 6 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 33 | Oct 2023 – Aug 2026 | 11 mg/l 6 Aug 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Jun 2024 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Sep 2024 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Jun 2024 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Sep 2024 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Jun 2024 – Sep 2024 | 0.0014 µg/l 23 Sep 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Jun 2024 – Sep 2024 | 0.005 µg/l 23 Sep 2024 |
| Perfluorobutanoic acid 2995 | River water | 2 | Jun 2024 – Sep 2024 | 0.0073 µg/l 23 Sep 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Jun 2024 – Sep 2024 | 0.0011 µg/l 23 Sep 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Jun 2024 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| Perfluorodecanoic acid 8892 | River water | 2 | Jun 2024 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Jun 2024 – Sep 2024 | below 0.005 µg/l 23 Sep 2024 |
| Perfluorododecanoic acid 8894 | River water | 2 | Jun 2024 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Jun 2024 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Jun 2024 – Sep 2024 | 0.0028 µg/l 23 Sep 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Jun 2024 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Jun 2024 – Sep 2024 | 0.00078 µg/l 23 Sep 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Jun 2024 – Sep 2024 | 0.0042 µg/l 23 Sep 2024 |
| Perfluorohexanoic acid 8888 | River water | 2 | Jun 2024 – Sep 2024 | 0.005 µg/l 23 Sep 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Jun 2024 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluorononanoic acid 8891 | River water | 2 | Jun 2024 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jun 2024 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Sep 2024 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Jun 2024 – Sep 2024 | 0.0035 µg/l 23 Sep 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Jun 2024 – Sep 2024 | 0.0058 µg/l 23 Sep 2024 |
| Perfluorooctanoic acid 8890 | River water | 2 | Jun 2024 – Sep 2024 | 0.0042 µg/l 23 Sep 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Jun 2024 – Sep 2024 | 0.00061 µg/l 23 Sep 2024 |
| Perfluoropentanoic acid 8887 | River water | 2 | Jun 2024 – Sep 2024 | 0.0067 µg/l 23 Sep 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Jun 2024 – Sep 2024 | below 0.006 µg/l 23 Sep 2024 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Jun 2024 – Sep 2024 | below 0.005 µg/l 23 Sep 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Jun 2024 – Sep 2024 | below 0.004 µg/l 23 Sep 2024 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Jun 2024 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| Perylene 9003 | River water | 26 | May 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| Phenanthrene 9671 | River water | 26 | Apr 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| Phosphorus, Total as P 0348 | River water | 28 | Oct 2023 – Aug 2026 | 0.21 mg/l 6 Aug 2026 |
| Potassium, Dissolved 0209 | River water | 33 | Oct 2023 – Aug 2026 | 14 mg/l 6 Aug 2026 |
| Pyrene 7325 | River water | 27 | Apr 2024 – Aug 2026 | below 0.01 µg/l 6 Aug 2026 |
| Silica, reactive as SiO2 0182 | River water | 28 | Oct 2023 – Aug 2026 | 11 mg/l 6 Aug 2026 |
| Sodium, Dissolved 0205 | River water | 33 | Oct 2023 – Aug 2026 | 67 mg/l 6 Aug 2026 |
| Solids, Suspended at 105 C 0135 | River water | 32 | Oct 2023 – Aug 2026 | 9.1 mg/l 6 Aug 2026 |
| Styrene :- {Vinylbenzene} 9888 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| Sulphate, Dissolved as SO4 7859 | River water | 33 | Oct 2023 – Aug 2026 | 84 mg/l 6 Aug 2026 |
| tert-Amyl methyl ether :- {TAME} 9839 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| Tetrachloroethylene :- {Perchloroethylene} 3328 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| Toluene :- {Methylbenzene} 3784 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| trans-1,2-Dichloroethylene :- {trans-1,2-Dichloroethene} 6539 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| Tributyl Tin as Cation 8944 | River water | 2 | Nov 2023 – Feb 2024 | below 0.0002 µg/l 2 Feb 2024 |
| Trichloroethylene :- {Trichloroethene} 3334 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| Trihalomethanes : Total :- {THM} 1200 | River water | 24 | Apr 2024 – Aug 2026 | below 0.4 µg/l 6 Aug 2026 |
| Vinyl chloride :- {Chloroethylene} 6715 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 6 Aug 2026 |
| Zinc, Dissolved 3408 | River water | 33 | Oct 2023 – Aug 2026 | 5 µg/l 6 Aug 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.