Mimmshall Brook at Water End
EA name: MIMMSHALL BROOK AT WATER END
Environment Agency sampling point TH-PCNR0068 · 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, 10:2027 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 35 since 2 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 523000, 203800As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Mimmshall Brook
- River, by the map
- Mimmshall BrookPlaced on the river its name gives, 44 m from the line.
- Next gauge downstream
- London Colney On the River Colne · 8.0 km along the river
- Nearest gauge upstream
- North Mymms On the Mimmshall Brook · 0.2 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (35 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
79.6%
Sampled 4 Sep 2026, 27 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:20 | 79.6 | 79.6% |
| 3 Aug 2026, 12:58 | 155.9 | 155.9% |
| 6 Jul 2026, 11:44 | 99.4 | 99.4% |
| 10 Jun 2026, 13:06 | 90.9 | 90.9% |
| 22 May 2026, 14:05 | 95.4 | 95.4% |
| 21 Apr 2026, 13:34 | 117.7 | 117.7% |
| 7 Apr 2026, 13:40 | 160.4 | 160.4% |
| 3 Mar 2026, 09:54 | 95.3 | 95.3% |
| 6 Feb 2026, 12:44 | 92.3 | 92.3% |
| 6 Jan 2026, 15:50 | 94.1 | 94.1% |
| 3 Dec 2025, 08:43 | 85.5 | 85.5% |
| 5 Nov 2025, 14:11 | 91.3 | 91.3% |
| 16 Oct 2025, 15:30 | 95.2 | 95.2% |
| 1 Sep 2025, 10:55 | 84.3 | 84.3% |
| 1 Aug 2025, 14:35 | 105.5 | 105.5% |
| 23 Jul 2025, 09:10 | 87.4 | 87.4% |
| 4 Jun 2025, 12:26 | 95.3 | 95.3% |
| 12 May 2025, 12:12 | 91.6 | 91.6% |
| 7 Apr 2025, 12:49 | 107.1 | 107.1% |
| 4 Mar 2025, 10:24 | 100.4 | 100.4% |
| 4 Feb 2025, 13:25 | 97.4 | 97.4% |
| 6 Jan 2025, 10:30 | 92.2 | 92.2% |
| 6 Dec 2024, 10:28 | 92.1 | 92.1% |
| 14 Nov 2024, 09:30 | 92.1 | 92.1% |
| 1 Oct 2024, 14:59 | 95.6 | 95.6% |
| 4 Sep 2024, 12:23 | 99.3 | 99.3% |
| 8 Aug 2024, 10:36 | 86.9 | 86.9% |
| 1 Jul 2024, 13:30 | 102.6 | 102.6% |
| 3 Jun 2024, 12:28 | 96.2 | 96.2% |
| 1 Mar 2024, 11:12 | 92 | 92% |
| 13 Feb 2024, 12:11 | 96.8 | 96.8% |
| 3 Jan 2024, 10:16 | 93.2 | 93.2% |
| 7 Dec 2023, 09:15 | 93.8 | 93.8% |
| 1 Nov 2023, 11:47 | 92.2 | 92.2% |
| 2 Oct 2023, 14:06 | 97.4 | 97.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.56 mg/l
Sampled 4 Sep 2026, 27 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:20 | 7.56 | 7.56 mg/l |
| 3 Aug 2026, 12:58 | 14.8 | 14.8 mg/l |
| 6 Jul 2026, 11:44 | 9.81 | 9.81 mg/l |
| 10 Jun 2026, 13:06 | 9.49 | 9.49 mg/l |
| 22 May 2026, 14:05 | 8.92 | 8.92 mg/l |
| 21 Apr 2026, 13:34 | 12.5 | 12.5 mg/l |
| 7 Apr 2026, 13:40 | 16.9 | 16.9 mg/l |
| 3 Mar 2026, 09:54 | 11.3 | 11.3 mg/l |
| 6 Feb 2026, 12:44 | 11 | 11 mg/l |
| 6 Jan 2026, 15:50 | 11.7 | 11.7 mg/l |
| 3 Dec 2025, 08:43 | 10.5 | 10.5 mg/l |
| 5 Nov 2025, 14:11 | 9.45 | 9.45 mg/l |
| 16 Oct 2025, 15:30 | 10.1 | 10.1 mg/l |
| 1 Sep 2025, 10:55 | 8.61 | 8.61 mg/l |
| 1 Aug 2025, 14:35 | 10.1 | 10.1 mg/l |
| 23 Jul 2025, 09:10 | 8.85 | 8.85 mg/l |
| 4 Jun 2025, 12:26 | 9.82 | 9.82 mg/l |
| 12 May 2025, 12:12 | 9.06 | 9.06 mg/l |
| 7 Apr 2025, 12:49 | 11.8 | 11.8 mg/l |
| 4 Mar 2025, 10:24 | 12.5 | 12.5 mg/l |
| 4 Feb 2025, 13:25 | 11.4 | 11.4 mg/l |
| 6 Jan 2025, 10:30 | 11.1 | 11.1 mg/l |
| 6 Dec 2024, 10:28 | 10.9 | 10.9 mg/l |
| 14 Nov 2024, 09:30 | 10.3 | 10.3 mg/l |
| 1 Oct 2024, 14:59 | 10.1 | 10.1 mg/l |
| 4 Sep 2024, 12:23 | 9.8 | 9.8 mg/l |
| 8 Aug 2024, 10:36 | 8.54 | 8.54 mg/l |
| 1 Jul 2024, 13:30 | 10.2 | 10.2 mg/l |
| 3 Jun 2024, 12:28 | 10.4 | 10.4 mg/l |
| 1 Mar 2024, 11:12 | 11.2 | 11.2 mg/l |
| 13 Feb 2024, 12:11 | 11.7 | 11.7 mg/l |
| 3 Jan 2024, 10:16 | 10.9 | 10.9 mg/l |
| 7 Dec 2023, 09:15 | 11.8 | 11.8 mg/l |
| 1 Nov 2023, 11:47 | 9.94 | 9.94 mg/l |
| 2 Oct 2023, 14:06 | 10.2 | 10.2 mg/l |
Water temperature
code 0076 · °C
17.7 °C
Sampled 4 Sep 2026, 27 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:20 | 17.7 | 17.7 °C |
| 3 Aug 2026, 12:58 | 17.8 | 17.8 °C |
| 6 Jul 2026, 11:44 | 15.9 | 15.9 °C |
| 10 Jun 2026, 13:06 | 13.3 | 13.3 °C |
| 22 May 2026, 14:05 | 18.5 | 18.5 °C |
| 21 Apr 2026, 13:34 | 12.6 | 12.6 °C |
| 7 Apr 2026, 13:40 | 13 | 13 °C |
| 3 Mar 2026, 09:54 | 7.9 | 7.9 °C |
| 6 Feb 2026, 12:44 | 7.6 | 7.6 °C |
| 6 Jan 2026, 15:50 | 6 | 6 °C |
| 3 Dec 2025, 08:43 | 6.4 | 6.4 °C |
| 5 Nov 2025, 14:11 | 13.7 | 13.7 °C |
| 16 Oct 2025, 15:30 | 12.7 | 12.7 °C |
| 1 Sep 2025, 10:55 | 14.3 | 14.3 °C |
| 1 Aug 2025, 14:35 | 17.2 | 17.2 °C |
| 23 Jul 2025, 09:10 | 14.7 | 14.7 °C |
| 4 Jun 2025, 12:26 | 13.9 | 13.9 °C |
| 12 May 2025, 12:12 | 15.8 | 15.8 °C |
| 7 Apr 2025, 12:49 | 10.9 | 10.9 °C |
| 4 Mar 2025, 10:24 | 5.9 | 5.9 °C |
| 4 Feb 2025, 13:25 | 8.3 | 8.3 °C |
| 6 Jan 2025, 10:30 | 7.4 | 7.4 °C |
| 6 Dec 2024, 10:28 | 8 | 8 °C |
| 14 Nov 2024, 09:30 | 10.2 | 10.2 °C |
| 1 Oct 2024, 14:59 | 12.8 | 12.8 °C |
| 4 Sep 2024, 12:23 | 15.9 | 15.9 °C |
| 8 Aug 2024, 10:36 | 16.1 | 16.1 °C |
| 1 Jul 2024, 13:30 | 15.4 | 15.4 °C |
| 3 Jun 2024, 12:28 | 11.9 | 11.9 °C |
| 1 Mar 2024, 11:12 | 6.9 | 6.9 °C |
| 13 Feb 2024, 12:11 | 7.1 | 7.1 °C |
| 3 Jan 2024, 10:16 | 8.6 | 8.6 °C |
| 7 Dec 2023, 09:15 | 5.6 | 5.6 °C |
| 1 Nov 2023, 11:47 | 11.9 | 11.9 °C |
| 2 Oct 2023, 14:06 | 13.1 | 13.1 °C |
pH
code 0061
7.85
Sampled 4 Sep 2026, 27 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:20 | 7.85 | 7.85 |
| 3 Aug 2026, 12:58 | 7.88 | 7.88 |
| 6 Jul 2026, 11:44 | 7.73 | 7.73 |
| 10 Jun 2026, 13:06 | 7.98 | 7.98 |
| 22 May 2026, 14:05 | 7.91 | 7.91 |
| 21 Apr 2026, 13:34 | 8.33 | 8.33 |
| 7 Apr 2026, 13:40 | 8.56 | 8.56 |
| 3 Mar 2026, 09:54 | 8.05 | 8.05 |
| 6 Feb 2026, 12:44 | 7.65 | 7.65 |
| 6 Jan 2026, 15:50 | 7.77 | 7.77 |
| 3 Dec 2025, 08:43 | 7.89 | 7.89 |
| 5 Nov 2025, 14:11 | 8.05 | 8.05 |
| 16 Oct 2025, 15:30 | 7.87 | 7.87 |
| 1 Sep 2025, 10:55 | 7.91 | 7.91 |
| 1 Aug 2025, 14:35 | 8.22 | 8.22 |
| 23 Jul 2025, 09:10 | 7.66 | 7.66 |
| 4 Jun 2025, 12:26 | 7.98 | 7.98 |
| 12 May 2025, 12:12 | 8.09 | 8.09 |
| 7 Apr 2025, 12:49 | 8.27 | 8.27 |
| 4 Mar 2025, 10:24 | 7.86 | 7.86 |
| 4 Feb 2025, 13:25 | 7.41 | 7.41 |
| 6 Jan 2025, 10:30 | 7.63 | 7.63 |
| 6 Dec 2024, 10:28 | 7.75 | 7.75 |
| 14 Nov 2024, 09:30 | 7.84 | 7.84 |
| 1 Oct 2024, 14:59 | 7.81 | 7.81 |
| 4 Sep 2024, 12:23 | 8.23 | 8.23 |
| 8 Aug 2024, 10:36 | 8.15 | 8.15 |
| 1 Jul 2024, 13:30 | 8.04 | 8.04 |
| 3 Jun 2024, 12:28 | 7.66 | 7.66 |
| 1 Mar 2024, 11:12 | 7.71 | 7.71 |
| 13 Feb 2024, 12:11 | 8.01 | 8.01 |
| 3 Jan 2024, 10:16 | 7.73 | 7.73 |
| 7 Dec 2023, 09:15 | 8 | 8 |
| 1 Nov 2023, 11:47 | 7.85 | 7.85 |
| 2 Oct 2023, 14:06 | 7.47 | 7.47 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 4 Sep 2026, 27 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Aug 2026, 12:58 | 0.05 | 0.05 mg/l |
| 6 Jul 2026, 11:44 | 0.38 | 0.38 mg/l |
| 10 Jun 2026, 13:06 | 0.063 | 0.063 mg/l |
| 22 May 2026, 14:05 | 0.047 | 0.047 mg/l |
| 21 Apr 2026, 13:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Mar 2026, 09:54 | 0.038 | 0.038 mg/l |
| 6 Feb 2026, 12:44 | 0.086 | 0.086 mg/l |
| 6 Jan 2026, 15:50 | 0.033 | 0.033 mg/l |
| 3 Dec 2025, 08:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Nov 2025, 14:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Oct 2025, 15:30 | 0.12 | 0.12 mg/l |
| 1 Sep 2025, 10:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Aug 2025, 14:35 | 0.041 | 0.041 mg/l |
| 23 Jul 2025, 09:10 | 0.14 | 0.14 mg/l |
| 4 Jun 2025, 12:26 | 0.1 | 0.1 mg/l |
| 12 May 2025, 12:12 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2025, 10:24 | 0.052 | 0.052 mg/l |
| 4 Feb 2025, 13:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Jan 2025, 10:30 | 0.045 | 0.045 mg/l |
| 6 Dec 2024, 10:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Nov 2024, 09:30 | 0.075 | 0.075 mg/l |
| 1 Oct 2024, 14:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Sep 2024, 12:23 | 0.05 | 0.05 mg/l |
| 8 Aug 2024, 10:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Jul 2024, 13:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jun 2024, 12:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Mar 2024, 11:12 | 0.2 | 0.2 mg/l |
| 13 Feb 2024, 12:11 | 0.046 | 0.046 mg/l |
| 3 Jan 2024, 10:16 | 0.032 | 0.032 mg/l |
| 7 Dec 2023, 09:15 | 0.04 | 0.04 mg/l |
| 1 Nov 2023, 11:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Oct 2023, 14:06 | 0.16 | 0.16 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.653 mg/l
Sampled 4 Sep 2026, 27 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:20 | 0.653 | 0.653 mg/l |
| 3 Aug 2026, 12:58 | 5.27 | 5.27 mg/l |
| 6 Jul 2026, 11:44 | 4.88 | 4.88 mg/l |
| 10 Jun 2026, 13:06 | 1.57 | 1.57 mg/l |
| 22 May 2026, 14:05 | 1.74 | 1.74 mg/l |
| 21 Apr 2026, 13:34 | 2.76 | 2.76 mg/l |
| 3 Mar 2026, 09:54 | 1.88 | 1.88 mg/l |
| 6 Feb 2026, 12:44 | 1.89 | 1.89 mg/l |
| 6 Jan 2026, 15:50 | 6.79 | 6.79 mg/l |
| 3 Dec 2025, 08:43 | 9.45 | 9.45 mg/l |
| 5 Nov 2025, 14:11 | 2.18 | 2.18 mg/l |
| 16 Oct 2025, 15:30 | 2.59 | 2.59 mg/l |
| 1 Sep 2025, 10:55 | 2.49 | 2.49 mg/l |
| 1 Aug 2025, 14:35 | 1.37 | 1.37 mg/l |
| 23 Jul 2025, 09:10 | 2.88 | 2.88 mg/l |
| 4 Jun 2025, 12:26 | 0.837 | 0.837 mg/l |
| 12 May 2025, 12:12 | 1.88 | 1.88 mg/l |
| 4 Mar 2025, 10:24 | 4.69 | 4.69 mg/l |
| 4 Feb 2025, 13:25 | 4.29 | 4.29 mg/l |
| 6 Jan 2025, 10:30 | 2.69 | 2.69 mg/l |
| 6 Dec 2024, 10:28 | 4.68 | 4.68 mg/l |
| 14 Nov 2024, 09:30 | 3.39 | 3.39 mg/l |
| 1 Oct 2024, 14:59 | 12 | 12 mg/l |
| 4 Sep 2024, 12:23 | 1.38 | 1.38 mg/l |
| 8 Aug 2024, 10:36 | 1.68 | 1.68 mg/l |
| 1 Jul 2024, 13:30 | 3.89 | 3.89 mg/l |
| 3 Jun 2024, 12:28 | 6.48 | 6.48 mg/l |
| 1 Mar 2024, 11:12 | 1.58 | 1.58 mg/l |
| 13 Feb 2024, 12:11 | 3.38 | 3.38 mg/l |
| 3 Jan 2024, 10:16 | 2.79 | 2.79 mg/l |
| 7 Dec 2023, 09:15 | 5.18 | 5.18 mg/l |
| 1 Nov 2023, 11:47 | 8.17 | 8.17 mg/l |
| 2 Oct 2023, 14:06 | 5.09 | 5.09 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.28 mg/l
Sampled 4 Sep 2026, 27 days ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:20 | 0.28 | 0.28 mg/l |
| 3 Aug 2026, 12:58 | 0.04 | 0.04 mg/l |
| 6 Jul 2026, 11:44 | 0.03 | 0.03 mg/l |
| 10 Jun 2026, 13:06 | 0.29 | 0.29 mg/l |
| 22 May 2026, 14:05 | 0.29 | 0.29 mg/l |
| 21 Apr 2026, 13:34 | 0.18 | 0.18 mg/l |
| 3 Mar 2026, 09:54 | 0.13 | 0.13 mg/l |
| 6 Feb 2026, 12:44 | 0.16 | 0.16 mg/l |
| 6 Jan 2026, 15:50 | 0.12 | 0.12 mg/l |
| 3 Dec 2025, 08:43 | 0.11 | 0.11 mg/l |
| 5 Nov 2025, 14:11 | 0.24 | 0.24 mg/l |
| 16 Oct 2025, 15:30 | 0.21 | 0.21 mg/l |
| 1 Sep 2025, 10:55 | 0.22 | 0.22 mg/l |
| 1 Aug 2025, 14:35 | 0.28 | 0.28 mg/l |
| 23 Jul 2025, 09:10 | 0.13 | 0.13 mg/l |
| 4 Jun 2025, 12:26 | 0.32 | 0.32 mg/l |
| 12 May 2025, 12:12 | 0.16 | 0.16 mg/l |
| 4 Mar 2025, 10:24 | 0.1 | 0.1 mg/l |
| 4 Feb 2025, 13:25 | 0.43 | 0.43 mg/l |
| 6 Jan 2025, 10:30 | 0.11 | 0.11 mg/l |
| 6 Dec 2024, 10:28 | 0.15 | 0.15 mg/l |
| 14 Nov 2024, 09:30 | 0.11 | 0.11 mg/l |
| 1 Oct 2024, 14:59 | 0.1 | 0.1 mg/l |
| 4 Sep 2024, 12:23 | 0.35 | 0.35 mg/l |
| 8 Aug 2024, 10:36 | 0.23 | 0.23 mg/l |
| 1 Jul 2024, 13:30 | 0.31 | 0.31 mg/l |
| 3 Jun 2024, 12:28 | 0.12 | 0.12 mg/l |
| 1 Mar 2024, 11:12 | 0.073 | 0.073 mg/l |
| 13 Feb 2024, 12:11 | 0.12 | 0.12 mg/l |
| 3 Jan 2024, 10:16 | 0.1 | 0.1 mg/l |
| 7 Dec 2023, 09:15 | 0.1 | 0.1 mg/l |
| 1 Nov 2023, 11:47 | 0.11 | 0.11 mg/l |
| 2 Oct 2023, 14:06 | 0.041 | 0.041 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
949 µS/cm
Sampled 4 Sep 2026, 27 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 10:20 | 949 | 949 µS/cm |
| 3 Aug 2026, 12:58 | 768 | 768 µS/cm |
| 6 Jul 2026, 11:44 | 843 | 843 µS/cm |
| 10 Jun 2026, 13:06 | 641 | 641 µS/cm |
| 22 May 2026, 14:05 | 939 | 939 µS/cm |
| 21 Apr 2026, 13:34 | 1010 | 1010 µS/cm |
| 7 Apr 2026, 13:40 | 957 | 957 µS/cm |
| 3 Mar 2026, 09:54 | 632 | 632 µS/cm |
| 6 Feb 2026, 12:44 | 331 | 331 µS/cm |
| 6 Jan 2026, 15:50 | 982 | 982 µS/cm |
| 3 Dec 2025, 08:43 | 1041 | 1041 µS/cm |
| 5 Nov 2025, 14:11 | 769 | 769 µS/cm |
| 16 Oct 2025, 15:30 | 886 | 886 µS/cm |
| 1 Sep 2025, 10:55 | 642 | 642 µS/cm |
| 1 Aug 2025, 14:35 | 1032 | 1032 µS/cm |
| 23 Jul 2025, 09:10 | 814 | 814 µS/cm |
| 4 Jun 2025, 12:26 | 1082 | 1082 µS/cm |
| 12 May 2025, 12:12 | 1124 | 1124 µS/cm |
| 7 Apr 2025, 12:49 | 1099 | 1099 µS/cm |
| 4 Mar 2025, 10:24 | 811 | 811 µS/cm |
| 4 Feb 2025, 13:25 | 743 | 743 µS/cm |
| 6 Jan 2025, 10:30 | 414 | 414 µS/cm |
| 6 Dec 2024, 10:28 | 562 | 562 µS/cm |
| 14 Nov 2024, 09:30 | 899 | 899 µS/cm |
| 1 Oct 2024, 14:59 | 720 | 720 µS/cm |
| 4 Sep 2024, 12:23 | 789 | 789 µS/cm |
| 8 Aug 2024, 10:36 | 843 | 843 µS/cm |
| 1 Jul 2024, 13:30 | 931 | 931 µS/cm |
| 3 Jun 2024, 12:28 | 839 | 839 µS/cm |
| 1 Mar 2024, 11:12 | 440 | 440 µS/cm |
| 13 Feb 2024, 12:11 | 674 | 674 µS/cm |
| 3 Jan 2024, 10:16 | 467 | 467 µS/cm |
| 7 Dec 2023, 09:15 | 653 | 653 µS/cm |
| 1 Nov 2023, 11:47 | 655 | 655 µS/cm |
| 2 Oct 2023, 14:06 | 807 | 807 µS/cm |
Everything measured here
65 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 65 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 35 | Oct 2023 – Sep 2026 | 79.6% 4 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 35 | Oct 2023 – Sep 2026 | 7.56 mg/l 4 Sep 2026 |
| Temperature of Water 0076 | River water | 35 | Oct 2023 – Sep 2026 | 17.7 °C 4 Sep 2026 |
| pH 0061 | River water | 35 | Oct 2023 – Sep 2026 | 7.85 4 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 33 | Oct 2023 – Sep 2026 | below 0.03 mg/l 4 Sep 2026 |
| Nitrate as N 0117 | River water | 33 | Oct 2023 – Sep 2026 | 0.653 mg/l 4 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 33 | Oct 2023 – Sep 2026 | 0.28 mg/l 4 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 35 | Oct 2023 – Sep 2026 | 949 µS/cm 4 Sep 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Jun 2024 – Jun 2025 | below 0.001 µg/l 4 Jun 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Jun 2024 – Jun 2025 | below 0.001 µg/l 4 Jun 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Jun 2024 – Jun 2025 | below 0.001 µg/l 4 Jun 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Jun 2024 – Jun 2025 | below 0.0005 µg/l 4 Jun 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Jun 2024 – Jun 2025 | below 0.0005 µg/l 4 Jun 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Jun 2024 – Jun 2025 | below 0.001 µg/l 4 Jun 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Jun 2024 – Jun 2025 | below 0.0005 µg/l 4 Jun 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Jun 2024 – Jun 2025 | below 0.004 µg/l 4 Jun 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Jun 2024 – Jun 2025 | below 0.001 µg/l 4 Jun 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Jun 2024 – Jun 2025 | below 0.0005 µg/l 4 Jun 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Jun 2024 – Jun 2025 | below 0.001 µg/l 4 Jun 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Jun 2024 – Jun 2025 | below 0.001 µg/l 4 Jun 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Jun 2024 – Jun 2025 | below 0.0005 µg/l 4 Jun 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 33 | Oct 2023 – Sep 2026 | 230 mg/l 4 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 33 | Oct 2023 – Sep 2026 | below 0.00068 mg/l 4 Sep 2026 |
| Calcium, Dissolved 0239 | River water | 6 | Apr 2025 – Jul 2026 | 140 mg/l 6 Jul 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 5 | Jul 2025 – Jul 2026 | 1.1 mg/l 6 Jul 2026 |
| Chlorine : Total Available 0912 | River water | 7 | Apr 2025 – Jul 2026 | 0.04 mg/l 6 Jul 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Jun 2024 – Jun 2025 | below 0.001 µg/l 4 Jun 2025 |
| Iron 6051 | River water | 6 | Apr 2025 – Jul 2026 | 58 µg/l 6 Jul 2026 |
| Iron, Dissolved 6460 | River water | 6 | Apr 2025 – Jul 2026 | below 30 µg/l 6 Jul 2026 |
| Magnesium, Dissolved 0235 | River water | 6 | Apr 2025 – Jul 2026 | 7 mg/l 6 Jul 2026 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Jun 2024 – Jun 2025 | below 0.002 µg/l 4 Jun 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Jun 2024 – Jun 2025 | below 0.002 µg/l 4 Jun 2025 |
| Nitrite as N 0118 | River water | 33 | Oct 2023 – Sep 2026 | 0.0066 mg/l 4 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 33 | Oct 2023 – Sep 2026 | 0.66 mg/l 4 Sep 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Jun 2024 – Jun 2025 | below 0.0005 µg/l 4 Jun 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Jun 2024 – Jun 2025 | below 0.0005 µg/l 4 Jun 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Jun 2024 – Jun 2025 | below 0.0005 µg/l 4 Jun 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Jun 2024 – Jun 2025 | below 0.0005 µg/l 4 Jun 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Jun 2024 – Jun 2025 | below 0.0005 µg/l 4 Jun 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Jun 2024 – Jun 2025 | 0.0063 µg/l 4 Jun 2025 |
| Perfluorobutanoic acid 2995 | River water | 2 | Jun 2024 – Jun 2025 | 0.014 µg/l 4 Jun 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Jun 2024 – Jun 2025 | 0.0019 µg/l 4 Jun 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Jun 2024 – Jun 2025 | below 0.001 µg/l 4 Jun 2025 |
| Perfluorodecanoic acid 8892 | River water | 2 | Jun 2024 – Jun 2025 | below 0.001 µg/l 4 Jun 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Jun 2024 – Jun 2025 | below 0.005 µg/l 4 Jun 2025 |
| Perfluorododecanoic acid 8894 | River water | 2 | Jun 2024 – Jun 2025 | below 0.002 µg/l 4 Jun 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Jun 2024 – Jun 2025 | below 0.0005 µg/l 4 Jun 2025 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Jun 2024 – Jun 2025 | 0.0059 µg/l 4 Jun 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Jun 2024 – Jun 2025 | below 0.0005 µg/l 4 Jun 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Jun 2024 – Jun 2025 | 0.00071 µg/l 4 Jun 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Jun 2024 – Jun 2025 | 0.003 µg/l 4 Jun 2025 |
| Perfluorohexanoic acid 8888 | River water | 2 | Jun 2024 – Jun 2025 | 0.029 µg/l 4 Jun 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Jun 2024 – Jun 2025 | below 0.0005 µg/l 4 Jun 2025 |
| Perfluorononanoic acid 8891 | River water | 2 | Jun 2024 – Jun 2025 | below 0.001 µg/l 4 Jun 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jun 2024 – Jun 2025 | below 0.002 µg/l 4 Jun 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Jun 2024 – Jun 2025 | below 0.001 µg/l 4 Jun 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Jun 2024 – Jun 2025 | 0.0036 µg/l 4 Jun 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Jun 2024 – Jun 2025 | 0.0052 µg/l 4 Jun 2025 |
| Perfluorooctanoic acid 8890 | River water | 2 | Jun 2024 – Jun 2025 | 0.0061 µg/l 4 Jun 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Jun 2024 – Jun 2025 | below 0.0005 µg/l 4 Jun 2025 |
| Perfluoropentanoic acid 8887 | River water | 2 | Jun 2024 – Jun 2025 | 0.016 µg/l 4 Jun 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Jun 2024 – Jun 2025 | below 0.006 µg/l 4 Jun 2025 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Jun 2024 – Jun 2025 | below 0.002 µg/l 4 Jun 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Jun 2024 – Jun 2025 | 0.0053 µg/l 4 Jun 2025 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Jun 2024 – Jun 2025 | below 0.001 µg/l 4 Jun 2025 |
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.