Lee at Wheathampstead
EA name: LEE AT WHEATHAMPSTEAD
Environment Agency sampling point TH-PLER0077 · 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
- 7 Aug 2026, 11:4255 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 35 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 517275, 214361As 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, 7 m from the line.
- Next gauge downstream
- Waterhall On the River Lee · 18 km along the river
- Nearest gauge upstream
- Harpenden On the River Lee · 5.0 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 · %
92.2%
Sampled 7 Aug 2026, 55 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 11:42 | 92.2 | 92.2% |
| 17 Jul 2026, 09:39 | 85.2 | 85.2% |
| 4 Jun 2026, 12:50 | 97.1 | 97.1% |
| 5 May 2026, 09:48 | 82.9 | 82.9% |
| 10 Apr 2026, 14:59 | 105.7 | 105.7% |
| 3 Mar 2026, 09:29 | 85.5 | 85.5% |
| 9 Feb 2026, 08:37 | 85 | 85% |
| 6 Jan 2026, 13:28 | 86.8 | 86.8% |
| 1 Dec 2025, 15:44 | 85.5 | 85.5% |
| 7 Nov 2025, 14:41 | 81.9 | 81.9% |
| 2 Oct 2025, 08:56 | 84.9 | 84.9% |
| 3 Sep 2025, 14:10 | 88.1 | 88.1% |
| 5 Aug 2025, 14:02 | 98.3 | 98.3% |
| 22 Jul 2025, 12:42 | 92.4 | 92.4% |
| 6 Jun 2025, 14:29 | 85.3 | 85.3% |
| 23 May 2025, 13:55 | 92.5 | 92.5% |
| 1 Apr 2025, 11:21 | 88.1 | 88.1% |
| 13 Mar 2025, 12:08 | 96.5 | 96.5% |
| 6 Feb 2025, 09:56 | 84.1 | 84.1% |
| 21 Jan 2025, 10:21 | 94.2 | 94.2% |
| 6 Dec 2024, 11:28 | 88.8 | 88.8% |
| 1 Nov 2024, 10:45 | 85 | 85% |
| 9 Oct 2024, 13:15 | 85.5 | 85.5% |
| 6 Sep 2024, 09:17 | 81.7 | 81.7% |
| 2 Aug 2024, 13:24 | 95.2 | 95.2% |
| 10 Jul 2024, 11:29 | 83.3 | 83.3% |
| 6 Jun 2024, 11:53 | 93.9 | 93.9% |
| 4 Mar 2024, 09:50 | 88.4 | 88.4% |
| 2 Feb 2024, 13:01 | 96.4 | 96.4% |
| 10 Jan 2024, 09:38 | 90.1 | 90.1% |
| 4 Dec 2023, 10:16 | 82.5 | 82.5% |
| 6 Nov 2023, 13:26 | 85.3 | 85.3% |
| 6 Oct 2023, 11:03 | 86.4 | 86.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.57 mg/l
Sampled 7 Aug 2026, 55 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 11:42 | 8.57 | 8.57 mg/l |
| 17 Jul 2026, 09:39 | 7.67 | 7.67 mg/l |
| 4 Jun 2026, 12:50 | 9.28 | 9.28 mg/l |
| 5 May 2026, 09:48 | 8.41 | 8.41 mg/l |
| 10 Apr 2026, 14:59 | 10.8 | 10.8 mg/l |
| 3 Mar 2026, 09:29 | 9.5 | 9.5 mg/l |
| 9 Feb 2026, 08:37 | 9.6 | 9.6 mg/l |
| 6 Jan 2026, 13:28 | 10.8 | 10.8 mg/l |
| 1 Dec 2025, 15:44 | 9.34 | 9.34 mg/l |
| 7 Nov 2025, 14:41 | 8.18 | 8.18 mg/l |
| 2 Oct 2025, 08:56 | 8.52 | 8.52 mg/l |
| 3 Sep 2025, 14:10 | 8.17 | 8.17 mg/l |
| 5 Aug 2025, 14:02 | 9.19 | 9.19 mg/l |
| 22 Jul 2025, 12:42 | 8.65 | 8.65 mg/l |
| 6 Jun 2025, 14:29 | 8.22 | 8.22 mg/l |
| 23 May 2025, 13:55 | 9.3 | 9.3 mg/l |
| 1 Apr 2025, 11:21 | 9.49 | 9.49 mg/l |
| 13 Mar 2025, 12:08 | 10.8 | 10.8 mg/l |
| 6 Feb 2025, 09:56 | 10.1 | 10.1 mg/l |
| 21 Jan 2025, 10:21 | 11.1 | 11.1 mg/l |
| 6 Dec 2024, 11:28 | 10.2 | 10.2 mg/l |
| 1 Nov 2024, 10:45 | 8.91 | 8.91 mg/l |
| 9 Oct 2024, 13:15 | 8.62 | 8.62 mg/l |
| 6 Sep 2024, 09:17 | 7.7 | 7.7 mg/l |
| 2 Aug 2024, 13:24 | 8.57 | 8.57 mg/l |
| 10 Jul 2024, 11:29 | 8.01 | 8.01 mg/l |
| 6 Jun 2024, 11:53 | 9.32 | 9.32 mg/l |
| 4 Mar 2024, 09:50 | 10.6 | 10.6 mg/l |
| 2 Feb 2024, 13:01 | 10.8 | 10.8 mg/l |
| 10 Jan 2024, 09:38 | 11 | 11 mg/l |
| 4 Dec 2023, 10:16 | 9.54 | 9.54 mg/l |
| 6 Nov 2023, 13:26 | 9.21 | 9.21 mg/l |
| 6 Oct 2023, 11:03 | 8.47 | 8.47 mg/l |
Water temperature
code 0076 · °C
18.8 °C
Sampled 7 Aug 2026, 55 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 11:42 | 18.8 | 18.8 °C |
| 17 Jul 2026, 09:39 | 20.4 | 20.4 °C |
| 4 Jun 2026, 12:50 | 17.4 | 17.4 °C |
| 5 May 2026, 09:48 | 14.6 | 14.6 °C |
| 10 Apr 2026, 14:59 | 14.1 | 14.1 °C |
| 3 Mar 2026, 09:29 | 10.6 | 10.6 °C |
| 9 Feb 2026, 08:37 | 9.9 | 9.9 °C |
| 6 Jan 2026, 13:28 | 6.1 | 6.1 °C |
| 1 Dec 2025, 15:44 | 11.3 | 11.3 °C |
| 7 Nov 2025, 14:41 | 15.3 | 15.3 °C |
| 2 Oct 2025, 08:56 | 15.1 | 15.1 °C |
| 3 Sep 2025, 14:10 | 18.9 | 18.9 °C |
| 5 Aug 2025, 14:02 | 18.5 | 18.5 °C |
| 22 Jul 2025, 12:42 | 18.4 | 18.4 °C |
| 6 Jun 2025, 14:29 | 17 | 17 °C |
| 23 May 2025, 13:55 | 15 | 15 °C |
| 1 Apr 2025, 11:21 | 11.9 | 11.9 °C |
| 13 Mar 2025, 12:08 | 10.1 | 10.1 °C |
| 6 Feb 2025, 09:56 | 7.2 | 7.2 °C |
| 21 Jan 2025, 10:21 | 8 | 8 °C |
| 6 Dec 2024, 11:28 | 9 | 9 °C |
| 1 Nov 2024, 10:45 | 13.1 | 13.1 °C |
| 9 Oct 2024, 13:15 | 14.9 | 14.9 °C |
| 6 Sep 2024, 09:17 | 18.1 | 18.1 °C |
| 2 Aug 2024, 13:24 | 20.4 | 20.4 °C |
| 10 Jul 2024, 11:29 | 17.1 | 17.1 °C |
| 6 Jun 2024, 11:53 | 15.6 | 15.6 °C |
| 4 Mar 2024, 09:50 | 7.6 | 7.6 °C |
| 2 Feb 2024, 13:01 | 10.2 | 10.2 °C |
| 10 Jan 2024, 09:38 | 6.8 | 6.8 °C |
| 4 Dec 2023, 10:16 | 8.9 | 8.9 °C |
| 6 Nov 2023, 13:26 | 11.8 | 11.8 °C |
| 6 Oct 2023, 11:03 | 16.2 | 16.2 °C |
pH
code 0061
7.98
Sampled 7 Aug 2026, 55 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 11:42 | 7.98 | 7.98 |
| 17 Jul 2026, 09:39 | 7.87 | 7.87 |
| 4 Jun 2026, 12:50 | 7.82 | 7.82 |
| 5 May 2026, 09:48 | 7.74 | 7.74 |
| 10 Apr 2026, 14:59 | 8.07 | 8.07 |
| 3 Mar 2026, 09:29 | 7.98 | 7.98 |
| 9 Feb 2026, 08:37 | 7.86 | 7.86 |
| 6 Jan 2026, 13:28 | 7.77 | 7.77 |
| 1 Dec 2025, 15:44 | 7.75 | 7.75 |
| 7 Nov 2025, 14:41 | 7.88 | 7.88 |
| 2 Oct 2025, 08:56 | 7.71 | 7.71 |
| 3 Sep 2025, 14:10 | 7.64 | 7.64 |
| 5 Aug 2025, 14:02 | 7.91 | 7.91 |
| 22 Jul 2025, 12:42 | 7.91 | 7.91 |
| 6 Jun 2025, 14:29 | 7.76 | 7.76 |
| 23 May 2025, 13:55 | 7.82 | 7.82 |
| 1 Apr 2025, 11:21 | 7.8 | 7.8 |
| 13 Mar 2025, 12:08 | 7.93 | 7.93 |
| 6 Feb 2025, 09:56 | 7.77 | 7.77 |
| 21 Jan 2025, 10:21 | 7.82 | 7.82 |
| 6 Dec 2024, 11:28 | 7.9 | 7.9 |
| 1 Nov 2024, 10:45 | 7.67 | 7.67 |
| 9 Oct 2024, 13:15 | 7.58 | 7.58 |
| 6 Sep 2024, 09:17 | 7.74 | 7.74 |
| 2 Aug 2024, 13:24 | 7.88 | 7.88 |
| 10 Jul 2024, 11:29 | 7.75 | 7.75 |
| 6 Jun 2024, 11:53 | 7.84 | 7.84 |
| 2 May 2024, 12:59 | 7.82 | 7.82 |
| 4 Apr 2024, 16:03 | 7.91 | 7.91 |
| 4 Mar 2024, 09:50 | 7.7 | 7.7 |
| 2 Feb 2024, 13:01 | 7.9 | 7.9 |
| 10 Jan 2024, 09:38 | 7.92 | 7.92 |
| 4 Dec 2023, 10:16 | 7.68 | 7.68 |
| 6 Nov 2023, 13:26 | 7.75 | 7.75 |
| 6 Oct 2023, 11:03 | 7.84 | 7.84 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 7 Aug 2026, 55 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 11:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jul 2026, 09:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Jun 2026, 12:50 | 0.032 | 0.032 mg/l |
| 5 May 2026, 09:48 | 0.17 | 0.17 mg/l |
| 10 Apr 2026, 14:59 | 0.063 | 0.063 mg/l |
| 3 Mar 2026, 09:29 | 0.15 | 0.15 mg/l |
| 9 Feb 2026, 08:37 | 0.032 | 0.032 mg/l |
| 6 Jan 2026, 13:28 | 0.96 | 0.96 mg/l |
| 1 Dec 2025, 15:44 | 0.25 | 0.25 mg/l |
| 7 Nov 2025, 14:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Oct 2025, 08:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Sep 2025, 14:10 | 0.15 | 0.15 mg/l |
| 5 Aug 2025, 14:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jul 2025, 12:42 | 0.035 | 0.035 mg/l |
| 6 Jun 2025, 14:29 | 1.2 | 1.2 mg/l |
| 23 May 2025, 13:55 | 2 | 2 mg/l |
| 13 Mar 2025, 12:08 | 0.16 | 0.16 mg/l |
| 6 Feb 2025, 09:56 | 0.037 | 0.037 mg/l |
| 21 Jan 2025, 10:21 | 0.042 | 0.042 mg/l |
| 6 Dec 2024, 11:28 | 0.072 | 0.072 mg/l |
| 1 Nov 2024, 10:45 | 0.033 | 0.033 mg/l |
| 9 Oct 2024, 13:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Sep 2024, 09:17 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Aug 2024, 13:24 | 0.034 | 0.034 mg/l |
| 10 Jul 2024, 11:29 | 0.049 | 0.049 mg/l |
| 6 Jun 2024, 11:53 | 0.033 | 0.033 mg/l |
| 4 Mar 2024, 09:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Feb 2024, 13:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Jan 2024, 09:38 | 0.038 | 0.038 mg/l |
| 4 Dec 2023, 10:16 | 0.52 | 0.52 mg/l |
| 6 Nov 2023, 13:26 | 0.17 | 0.17 mg/l |
| 6 Oct 2023, 11:03 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
16 mg/l
Sampled 7 Aug 2026, 55 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 11:42 | 16 | 16 mg/l |
| 17 Jul 2026, 09:39 | 17 | 17 mg/l |
| 4 Jun 2026, 12:50 | 8.26 | 8.26 mg/l |
| 5 May 2026, 09:48 | 12.9 | 12.9 mg/l |
| 10 Apr 2026, 14:59 | 12.9 | 12.9 mg/l |
| 3 Mar 2026, 09:29 | 7.71 | 7.71 mg/l |
| 9 Feb 2026, 08:37 | 9.28 | 9.28 mg/l |
| 6 Jan 2026, 13:28 | 16.8 | 16.8 mg/l |
| 1 Dec 2025, 15:44 | 14.9 | 14.9 mg/l |
| 7 Nov 2025, 14:41 | 19 | 19 mg/l |
| 2 Oct 2025, 08:56 | 18 | 18 mg/l |
| 3 Sep 2025, 14:10 | 17.9 | 17.9 mg/l |
| 5 Aug 2025, 14:02 | 17 | 17 mg/l |
| 22 Jul 2025, 12:42 | 14 | 14 mg/l |
| 6 Jun 2025, 14:29 | 12.2 | 12.2 mg/l |
| 23 May 2025, 13:55 | 16.6 | 16.6 mg/l |
| 13 Mar 2025, 12:08 | 10.8 | 10.8 mg/l |
| 6 Feb 2025, 09:56 | 14.9 | 14.9 mg/l |
| 21 Jan 2025, 10:21 | 13.9 | 13.9 mg/l |
| 6 Dec 2024, 11:28 | 8.83 | 8.83 mg/l |
| 1 Nov 2024, 10:45 | 9.98 | 9.98 mg/l |
| 9 Oct 2024, 13:15 | 8.87 | 8.87 mg/l |
| 6 Sep 2024, 09:17 | 12 | 12 mg/l |
| 2 Aug 2024, 13:24 | 9.53 | 9.53 mg/l |
| 10 Jul 2024, 11:29 | 5.34 | 5.34 mg/l |
| 6 Jun 2024, 11:53 | 12.9 | 12.9 mg/l |
| 4 Mar 2024, 09:50 | 8.37 | 8.37 mg/l |
| 2 Feb 2024, 13:01 | 14 | 14 mg/l |
| 10 Jan 2024, 09:38 | 13 | 13 mg/l |
| 4 Dec 2023, 10:16 | 9.36 | 9.36 mg/l |
| 6 Nov 2023, 13:26 | 13.9 | 13.9 mg/l |
| 6 Oct 2023, 11:03 | 14 | 14 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.38 mg/l
Sampled 7 Aug 2026, 55 days ago · 32 results banked
Every result (32)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 11:42 | 0.38 | 0.38 mg/l |
| 17 Jul 2026, 09:39 | 0.4 | 0.4 mg/l |
| 4 Jun 2026, 12:50 | 0.26 | 0.26 mg/l |
| 5 May 2026, 09:48 | 0.28 | 0.28 mg/l |
| 10 Apr 2026, 14:59 | 0.35 | 0.35 mg/l |
| 3 Mar 2026, 09:29 | 0.13 | 0.13 mg/l |
| 9 Feb 2026, 08:37 | 0.14 | 0.14 mg/l |
| 6 Jan 2026, 13:28 | 0.41 | 0.41 mg/l |
| 1 Dec 2025, 15:44 | 0.54 | 0.54 mg/l |
| 7 Nov 2025, 14:41 | 0.41 | 0.41 mg/l |
| 2 Oct 2025, 08:56 | 0.3 | 0.3 mg/l |
| 3 Sep 2025, 14:10 | 0.28 | 0.28 mg/l |
| 5 Aug 2025, 14:02 | 0.38 | 0.38 mg/l |
| 22 Jul 2025, 12:42 | 0.39 | 0.39 mg/l |
| 6 Jun 2025, 14:29 | 0.27 | 0.27 mg/l |
| 23 May 2025, 13:55 | 0.22 | 0.22 mg/l |
| 13 Mar 2025, 12:08 | 0.18 | 0.18 mg/l |
| 6 Feb 2025, 09:56 | 0.18 | 0.18 mg/l |
| 21 Jan 2025, 10:21 | 0.2 | 0.2 mg/l |
| 6 Dec 2024, 11:28 | 0.14 | 0.14 mg/l |
| 1 Nov 2024, 10:45 | 0.58 | 0.58 mg/l |
| 9 Oct 2024, 13:15 | 0.24 | 0.24 mg/l |
| 6 Sep 2024, 09:17 | 0.3 | 0.3 mg/l |
| 2 Aug 2024, 13:24 | 0.37 | 0.37 mg/l |
| 10 Jul 2024, 11:29 | 0.23 | 0.23 mg/l |
| 6 Jun 2024, 11:53 | 0.37 | 0.37 mg/l |
| 4 Mar 2024, 09:50 | 0.16 | 0.16 mg/l |
| 2 Feb 2024, 13:01 | 0.19 | 0.19 mg/l |
| 10 Jan 2024, 09:38 | 0.16 | 0.16 mg/l |
| 4 Dec 2023, 10:16 | 0.23 | 0.23 mg/l |
| 6 Nov 2023, 13:26 | 0.16 | 0.16 mg/l |
| 6 Oct 2023, 11:03 | 0.37 | 0.37 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1168 µS/cm
Sampled 7 Aug 2026, 55 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Aug 2026, 11:42 | 1168 | 1168 µS/cm |
| 17 Jul 2026, 09:39 | 1143 | 1143 µS/cm |
| 4 Jun 2026, 12:50 | 772 | 772 µS/cm |
| 5 May 2026, 09:48 | 982 | 982 µS/cm |
| 10 Apr 2026, 14:59 | 993 | 993 µS/cm |
| 3 Mar 2026, 09:29 | 951 | 951 µS/cm |
| 9 Feb 2026, 08:37 | 787 | 787 µS/cm |
| 6 Jan 2026, 13:28 | 1073 | 1073 µS/cm |
| 1 Dec 2025, 15:44 | 1032 | 1032 µS/cm |
| 7 Nov 2025, 14:41 | 1185 | 1185 µS/cm |
| 2 Oct 2025, 08:56 | 1157 | 1157 µS/cm |
| 3 Sep 2025, 14:10 | 1017 | 1017 µS/cm |
| 5 Aug 2025, 14:02 | 1098 | 1098 µS/cm |
| 22 Jul 2025, 12:42 | 799 | 799 µS/cm |
| 6 Jun 2025, 14:29 | 992 | 992 µS/cm |
| 23 May 2025, 13:55 | 1061 | 1061 µS/cm |
| 1 Apr 2025, 11:21 | 972 | 972 µS/cm |
| 13 Mar 2025, 12:08 | 979 | 979 µS/cm |
| 6 Feb 2025, 09:56 | 964 | 964 µS/cm |
| 21 Jan 2025, 10:21 | 966 | 966 µS/cm |
| 6 Dec 2024, 11:28 | 802 | 802 µS/cm |
| 1 Nov 2024, 10:45 | 916 | 916 µS/cm |
| 9 Oct 2024, 13:15 | 837 | 837 µS/cm |
| 6 Sep 2024, 09:17 | 1051 | 1051 µS/cm |
| 2 Aug 2024, 13:24 | 996 | 996 µS/cm |
| 10 Jul 2024, 11:29 | 635 | 635 µS/cm |
| 6 Jun 2024, 11:53 | 948 | 948 µS/cm |
| 4 Mar 2024, 09:50 | 710 | 710 µS/cm |
| 2 Feb 2024, 13:01 | 977 | 977 µS/cm |
| 10 Jan 2024, 09:38 | 887 | 887 µS/cm |
| 4 Dec 2023, 10:16 | 943 | 943 µS/cm |
| 6 Nov 2023, 13:26 | 851 | 851 µS/cm |
| 6 Oct 2023, 11:03 | 1100 | 1100 µS/cm |
Everything measured here
45 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 45 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 33 | Oct 2023 – Aug 2026 | 92.2% 7 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 33 | Oct 2023 – Aug 2026 | 8.57 mg/l 7 Aug 2026 |
| Temperature of Water 0076 | River water | 33 | Oct 2023 – Aug 2026 | 18.8 °C 7 Aug 2026 |
| pH 0061 | River water | 35 | Oct 2023 – Aug 2026 | 7.98 7 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 32 | Oct 2023 – Aug 2026 | below 0.03 mg/l 7 Aug 2026 |
| Nitrate as N 0117 | River water | 32 | Oct 2023 – Aug 2026 | 16 mg/l 7 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 32 | Oct 2023 – Aug 2026 | 0.38 mg/l 7 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 33 | Oct 2023 – Aug 2026 | 1168 µS/cm 7 Aug 2026 |
| 1,1,1,2-Tetrachloroethane 6534 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| 1,1,1-Trichloroethane 3268 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| 1,1,2,2-Tetrachloroethane 7531 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| 1,1,2-Trichloroethane 9811 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| 1,1-Dichloroethane 3269 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| 1,1-Dichloroethylene :- {1,1-Dichloroethene} 9836 | River water | 23 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| 1,2-Dichloroethane 3272 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| 1,2-Dimethylbenzene :- {o-Xylene} 9845 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 32 | Oct 2023 – Aug 2026 | 190 mg/l 7 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 32 | Oct 2023 – Aug 2026 | below 0.00099 mg/l 7 Aug 2026 |
| Benzene 3781 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| Bromodichloromethane 3282 | River water | 23 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| Bromoform :- {Tribromomethane} 3283 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| Calcium, Dissolved 0239 | River water | 29 | Apr 2024 – Aug 2026 | 120 mg/l 7 Aug 2026 |
| Carbon tetrachloride :- {Tetrachloromethane} 1049 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 28 | Apr 2024 – Aug 2026 | 5.3 mg/l 7 Aug 2026 |
| Chlorobenzene 3290 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| Chlorodibromomethane 3292 | River water | 23 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| Chloroform :- {Trichloromethane} 3373 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| Chromium 3164 | River water | 29 | Apr 2024 – Aug 2026 | 0.58 µg/l 7 Aug 2026 |
| Chromium Hexavalent, Dissolved :- {Cr VI} 6619 | River water | 27 | Apr 2024 – Aug 2026 | 0.17 µg/l 7 Aug 2026 |
| Chromium, Dissolved 3409 | River water | 29 | Apr 2024 – Aug 2026 | below 0.5 µg/l 7 Aug 2026 |
| cis-1,2-Dichloroethylene :- {cis-1,2-Dichloroethene} 6538 | River water | 24 | Apr 2024 – Aug 2026 | below 0.5 µg/l 7 Aug 2026 |
| Dimethylbenzene : Sum of isomers (1,3- 1,4-) 6716 | River water | 24 | Apr 2024 – Aug 2026 | below 0.2 µg/l 7 Aug 2026 |
| Ethyl tert-butyl ether :- {ETBE} 9844 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| Ethylbenzene 4117 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| MTBE :- {Methyl tert-butyl ether} 6656 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| Nitrite as N 0118 | River water | 32 | Oct 2023 – Aug 2026 | 0.044 mg/l 7 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 32 | Oct 2023 – Aug 2026 | 16 mg/l 7 Aug 2026 |
| Styrene :- {Vinylbenzene} 9888 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| tert-Amyl methyl ether :- {TAME} 9839 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| Tetrachloroethylene :- {Perchloroethylene} 3328 | River water | 23 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| Toluene :- {Methylbenzene} 3784 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| trans-1,2-Dichloroethylene :- {trans-1,2-Dichloroethene} 6539 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| Trichloroethylene :- {Trichloroethene} 3334 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 Aug 2026 |
| Trihalomethanes : Total :- {THM} 1200 | River water | 23 | Apr 2024 – Aug 2026 | below 0.4 µg/l 7 Aug 2026 |
| Vinyl chloride :- {Chloroethylene} 6715 | River water | 24 | Apr 2024 – Aug 2026 | below 0.1 µg/l 7 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.