Colwell Brook at A4095
EA name: COLWELL BROOK AT A4095
Environment Agency sampling point TH-PWRR0037 · 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
- 21 Aug 2026, 12:4641 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 31 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 433760, 209035As published, to the nearest 1 m. Open in a map
- River, by its own name
- Colwell Brook
- River, by the map
- Not placedNo mapped watercourse within 500 m. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (15 samples)
Environmental monitoring statutory (EU directives) (15 samples)
Planned investigation (national agency policy) (1 samples)
1 visit found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
47.6%
Sampled 28 Jul 2026, 2 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Jul 2026, 14:45 | 47.6 | 47.6% |
| 22 Jun 2026, 12:17 | 38.2 | 38.2% |
| 29 May 2026, 13:48 | 53.6 | 53.6% |
| 10 Apr 2026, 10:50 | 61.6 | 61.6% |
| 27 Mar 2026, 12:08 | 76.1 | 76.1% |
| 18 Feb 2026, 11:06 | 94.4 | 94.4% |
| 16 Jan 2026, 11:40 | 87.9 | 87.9% |
| 5 Dec 2025, 11:12 | 94.4 | 94.4% |
| 12 Nov 2025, 12:02 | 86.1 | 86.1% |
| 21 Oct 2025, 12:11 | 86.4 | 86.4% |
| 9 Apr 2025, 12:38 | 71.1 | 71.1% |
| 21 Mar 2025, 12:56 | 83.6 | 83.6% |
| 18 Feb 2025, 13:36 | 98 | 98% |
| 30 Jan 2025, 15:04 | 92.9 | 92.9% |
| 10 Dec 2024, 11:38 | 91.2 | 91.2% |
| 19 Nov 2024, 08:56 | 89.4 | 89.4% |
| 16 Oct 2024, 11:23 | 89.1 | 89.1% |
| 23 Sep 2024, 14:01 | 88 | 88% |
| 2 Sep 2024, 11:46 | 80.6 | 80.6% |
| 17 Jul 2024, 09:36 | 87.3 | 87.3% |
| 27 Jun 2024, 10:49 | 80.4 | 80.4% |
| 23 May 2024, 10:30 | 88.2 | 88.2% |
| 26 Apr 2024, 11:39 | 97.5 | 97.5% |
| 4 Apr 2024, 11:43 | 96.1 | 96.1% |
| 18 Mar 2024, 11:20 | 98.9 | 98.9% |
| 26 Feb 2024, 11:28 | 92.1 | 92.1% |
| 23 Jan 2024, 11:11 | 90.8 | 90.8% |
| 7 Dec 2023, 10:20 | 90.4 | 90.4% |
| 23 Nov 2023, 12:25 | 85.8 | 85.8% |
| 16 Oct 2023, 10:19 | 85.3 | 85.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
4.49 mg/l
Sampled 28 Jul 2026, 2 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Jul 2026, 14:45 | 4.49 | 4.49 mg/l |
| 22 Jun 2026, 12:17 | 3.72 | 3.72 mg/l |
| 29 May 2026, 13:48 | 5.39 | 5.39 mg/l |
| 10 Apr 2026, 10:50 | 6.91 | 6.91 mg/l |
| 27 Mar 2026, 12:08 | 8.61 | 8.61 mg/l |
| 18 Feb 2026, 11:06 | 11.4 | 11.4 mg/l |
| 16 Jan 2026, 11:40 | 10.8 | 10.8 mg/l |
| 5 Dec 2025, 11:12 | 11.2 | 11.2 mg/l |
| 12 Nov 2025, 12:02 | 9.01 | 9.01 mg/l |
| 21 Oct 2025, 12:11 | 8.98 | 8.98 mg/l |
| 9 Apr 2025, 12:38 | 7.86 | 7.86 mg/l |
| 21 Mar 2025, 12:56 | 9.44 | 9.44 mg/l |
| 18 Feb 2025, 13:36 | 12 | 12 mg/l |
| 30 Jan 2025, 15:04 | 11.1 | 11.1 mg/l |
| 10 Dec 2024, 11:38 | 10.5 | 10.5 mg/l |
| 19 Nov 2024, 08:56 | 10.5 | 10.5 mg/l |
| 16 Oct 2024, 11:23 | 9.1 | 9.1 mg/l |
| 23 Sep 2024, 14:01 | 8.81 | 8.81 mg/l |
| 2 Sep 2024, 11:46 | 7.71 | 7.71 mg/l |
| 17 Jul 2024, 09:36 | 8.84 | 8.84 mg/l |
| 27 Jun 2024, 10:49 | 7.95 | 7.95 mg/l |
| 23 May 2024, 10:30 | 9.19 | 9.19 mg/l |
| 26 Apr 2024, 11:39 | 11 | 11 mg/l |
| 4 Apr 2024, 11:43 | 10.6 | 10.6 mg/l |
| 18 Mar 2024, 11:20 | 10.9 | 10.9 mg/l |
| 26 Feb 2024, 11:28 | 10.9 | 10.9 mg/l |
| 23 Jan 2024, 11:11 | 10.8 | 10.8 mg/l |
| 7 Dec 2023, 10:20 | 10.4 | 10.4 mg/l |
| 23 Nov 2023, 12:25 | 9.27 | 9.27 mg/l |
| 16 Oct 2023, 10:19 | 9.43 | 9.43 mg/l |
Water temperature
code 0076 · °C
18.1 °C
Sampled 28 Jul 2026, 2 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Jul 2026, 14:45 | 18.1 | 18.1 °C |
| 22 Jun 2026, 12:17 | 16.5 | 16.5 °C |
| 29 May 2026, 13:48 | 15 | 15 °C |
| 10 Apr 2026, 10:50 | 10.2 | 10.2 °C |
| 27 Mar 2026, 12:08 | 9.8 | 9.8 °C |
| 18 Feb 2026, 11:06 | 7 | 7 °C |
| 16 Jan 2026, 11:40 | 6.5 | 6.5 °C |
| 5 Dec 2025, 11:12 | 8 | 8 °C |
| 12 Nov 2025, 12:02 | 13.2 | 13.2 °C |
| 21 Oct 2025, 12:11 | 13.5 | 13.5 °C |
| 9 Apr 2025, 12:38 | 10.8 | 10.8 °C |
| 21 Mar 2025, 12:56 | 9.9 | 9.9 °C |
| 18 Feb 2025, 13:36 | 6.7 | 6.7 °C |
| 30 Jan 2025, 15:04 | 7.6 | 7.6 °C |
| 10 Dec 2024, 11:38 | 9.2 | 9.2 °C |
| 19 Nov 2024, 08:56 | 8.3 | 8.3 °C |
| 16 Oct 2024, 11:23 | 14.3 | 14.3 °C |
| 23 Sep 2024, 14:01 | 15.2 | 15.2 °C |
| 2 Sep 2024, 11:46 | 17.4 | 17.4 °C |
| 17 Jul 2024, 09:36 | 14.7 | 14.7 °C |
| 27 Jun 2024, 10:49 | 15.8 | 15.8 °C |
| 23 May 2024, 10:30 | 13.4 | 13.4 °C |
| 26 Apr 2024, 11:39 | 9.8 | 9.8 °C |
| 4 Apr 2024, 11:43 | 10.8 | 10.8 °C |
| 18 Mar 2024, 11:20 | 10.8 | 10.8 °C |
| 26 Feb 2024, 11:28 | 7.8 | 7.8 °C |
| 23 Jan 2024, 11:11 | 7.8 | 7.8 °C |
| 7 Dec 2023, 10:20 | 9.2 | 9.2 °C |
| 23 Nov 2023, 12:25 | 11.8 | 11.8 °C |
| 16 Oct 2023, 10:19 | 10.8 | 10.8 °C |
pH
code 0061
7.33
Sampled 28 Jul 2026, 2 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Jul 2026, 14:45 | 7.33 | 7.33 |
| 22 Jun 2026, 12:17 | 7.27 | 7.27 |
| 29 May 2026, 13:48 | 7.37 | 7.37 |
| 10 Apr 2026, 10:50 | 7.51 | 7.51 |
| 27 Mar 2026, 12:08 | 7.64 | 7.64 |
| 18 Feb 2026, 11:06 | 7.98 | 7.98 |
| 16 Jan 2026, 11:40 | 7.82 | 7.82 |
| 5 Dec 2025, 11:12 | 7.99 | 7.99 |
| 12 Nov 2025, 12:02 | 7.8 | 7.8 |
| 21 Oct 2025, 12:11 | 7.94 | 7.94 |
| 9 Apr 2025, 12:38 | 7.68 | 7.68 |
| 21 Mar 2025, 12:56 | 7.78 | 7.78 |
| 18 Feb 2025, 13:36 | 8.05 | 8.05 |
| 30 Jan 2025, 15:04 | 7.96 | 7.96 |
| 10 Dec 2024, 11:38 | 7.94 | 7.94 |
| 19 Nov 2024, 08:56 | 7.72 | 7.72 |
| 16 Oct 2024, 11:23 | 7.89 | 7.89 |
| 23 Sep 2024, 14:01 | 8.08 | 8.08 |
| 2 Sep 2024, 11:46 | 7.75 | 7.75 |
| 17 Jul 2024, 09:36 | 7.76 | 7.76 |
| 27 Jun 2024, 10:49 | 7.81 | 7.81 |
| 23 May 2024, 10:30 | 7.82 | 7.82 |
| 26 Apr 2024, 11:39 | 8.12 | 8.12 |
| 4 Apr 2024, 11:43 | 7.82 | 7.82 |
| 18 Mar 2024, 11:20 | 8.03 | 8.03 |
| 26 Feb 2024, 11:28 | 7.85 | 7.85 |
| 23 Jan 2024, 11:11 | 7.87 | 7.87 |
| 7 Dec 2023, 10:20 | 7.92 | 7.92 |
| 23 Nov 2023, 12:25 | 7.85 | 7.85 |
| 16 Oct 2023, 10:19 | 7.77 | 7.77 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 28 Jul 2026, 2 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Jul 2026, 14:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jun 2026, 12:17 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 May 2026, 13:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Apr 2026, 10:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Mar 2026, 12:08 | 0.3 | 0.3 mg/l |
| 18 Feb 2026, 11:06 | 0.056 | 0.056 mg/l |
| 16 Jan 2026, 11:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Dec 2025, 11:12 | 0.039 | 0.039 mg/l |
| 12 Nov 2025, 12:02 | 0.053 | 0.053 mg/l |
| 21 Oct 2025, 12:11 | 0.13 | 0.13 mg/l |
| 9 Apr 2025, 12:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Mar 2025, 12:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Feb 2025, 13:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Jan 2025, 15:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Dec 2024, 11:38 | 0.031 | 0.031 mg/l |
| 19 Nov 2024, 08:56 | 0.037 | 0.037 mg/l |
| 16 Oct 2024, 11:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Sep 2024, 14:01 | 0.084 | 0.084 mg/l |
| 2 Sep 2024, 11:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jul 2024, 09:36 | 0.038 | 0.038 mg/l |
| 27 Jun 2024, 10:49 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 May 2024, 10:30 | 0.056 | 0.056 mg/l |
| 26 Apr 2024, 11:39 | 0.28 | 0.28 mg/l |
| 18 Mar 2024, 11:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Feb 2024, 11:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Jan 2024, 11:11 | 0.67 | 0.67 mg/l |
| 7 Dec 2023, 10:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Nov 2023, 12:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Oct 2023, 10:19 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5 mg/l
Sampled 28 Jul 2026, 2 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Jul 2026, 14:45 | 5 | 5 mg/l |
| 22 Jun 2026, 12:17 | 4.5 | 4.5 mg/l |
| 29 May 2026, 13:48 | 5 | 5 mg/l |
| 10 Apr 2026, 10:50 | 5 | 5 mg/l |
| 27 Mar 2026, 12:08 | 2.31 | 2.31 mg/l |
| 18 Feb 2026, 11:06 | 4.69 | 4.69 mg/l |
| 16 Jan 2026, 11:40 | 3.49 | 3.49 mg/l |
| 5 Dec 2025, 11:12 | 4.78 | 4.78 mg/l |
| 12 Nov 2025, 12:02 | 2.48 | 2.48 mg/l |
| 21 Oct 2025, 12:11 | 2.45 | 2.45 mg/l |
| 9 Apr 2025, 12:38 | 2.8 | 2.8 mg/l |
| 21 Mar 2025, 12:56 | 2.6 | 2.6 mg/l |
| 18 Feb 2025, 13:36 | 2.89 | 2.89 mg/l |
| 30 Jan 2025, 15:04 | 3.39 | 3.39 mg/l |
| 10 Dec 2024, 11:38 | 3.19 | 3.19 mg/l |
| 19 Nov 2024, 08:56 | 1.19 | 1.19 mg/l |
| 16 Oct 2024, 11:23 | 2.39 | 2.39 mg/l |
| 23 Sep 2024, 14:01 | 1.38 | 1.38 mg/l |
| 2 Sep 2024, 11:46 | 3.38 | 3.38 mg/l |
| 17 Jul 2024, 09:36 | 2.68 | 2.68 mg/l |
| 27 Jun 2024, 10:49 | 3.09 | 3.09 mg/l |
| 23 May 2024, 10:30 | 2.47 | 2.47 mg/l |
| 26 Apr 2024, 11:39 | 3.58 | 3.58 mg/l |
| 18 Mar 2024, 11:20 | 3.49 | 3.49 mg/l |
| 26 Feb 2024, 11:28 | 4.2 | 4.2 mg/l |
| 23 Jan 2024, 11:11 | 1.94 | 1.94 mg/l |
| 7 Dec 2023, 10:20 | 3.09 | 3.09 mg/l |
| 23 Nov 2023, 12:25 | 3.69 | 3.69 mg/l |
| 16 Oct 2023, 10:19 | 4.89 | 4.89 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.19 mg/l
Sampled 28 Jul 2026, 2 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Jul 2026, 14:45 | 0.19 | 0.19 mg/l |
| 22 Jun 2026, 12:17 | 0.17 | 0.17 mg/l |
| 29 May 2026, 13:48 | 0.15 | 0.15 mg/l |
| 10 Apr 2026, 10:50 | 0.15 | 0.15 mg/l |
| 27 Mar 2026, 12:08 | 0.046 | 0.046 mg/l |
| 18 Feb 2026, 11:06 | 0.033 | 0.033 mg/l |
| 16 Jan 2026, 11:40 | 0.033 | 0.033 mg/l |
| 5 Dec 2025, 11:12 | 0.039 | 0.039 mg/l |
| 12 Nov 2025, 12:02 | 0.058 | 0.058 mg/l |
| 21 Oct 2025, 12:11 | 0.11 | 0.11 mg/l |
| 9 Apr 2025, 12:38 | 0.13 | 0.13 mg/l |
| 21 Mar 2025, 12:56 | 0.098 | 0.098 mg/l |
| 18 Feb 2025, 13:36 | 0.045 | 0.045 mg/l |
| 30 Jan 2025, 15:04 | 0.028 | 0.028 mg/l |
| 10 Dec 2024, 11:38 | 0.023 | 0.023 mg/l |
| 19 Nov 2024, 08:56 | 0.038 | 0.038 mg/l |
| 16 Oct 2024, 11:23 | 0.042 | 0.042 mg/l |
| 23 Sep 2024, 14:01 | 0.048 | 0.048 mg/l |
| 2 Sep 2024, 11:46 | 0.17 | 0.17 mg/l |
| 17 Jul 2024, 09:36 | 0.054 | 0.054 mg/l |
| 27 Jun 2024, 10:49 | 0.15 | 0.15 mg/l |
| 23 May 2024, 10:30 | 0.042 | 0.042 mg/l |
| 26 Apr 2024, 11:39 | 0.037 | 0.037 mg/l |
| 18 Mar 2024, 11:20 | 0.022 | 0.022 mg/l |
| 26 Feb 2024, 11:28 | 0.049 | 0.049 mg/l |
| 23 Jan 2024, 11:11 | 0.044 | 0.044 mg/l |
| 7 Dec 2023, 10:20 | 0.027 | 0.027 mg/l |
| 23 Nov 2023, 12:25 | 0.057 | 0.057 mg/l |
| 16 Oct 2023, 10:19 | 0.05 | 0.05 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
763 µS/cm
Sampled 28 Jul 2026, 2 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 28 Jul 2026, 14:45 | 763 | 763 µS/cm |
| 22 Jun 2026, 12:17 | 768 | 768 µS/cm |
| 29 May 2026, 13:48 | 794 | 794 µS/cm |
| 10 Apr 2026, 10:50 | 828 | 828 µS/cm |
| 27 Mar 2026, 12:08 | 905 | 905 µS/cm |
| 18 Feb 2026, 11:06 | 778 | 778 µS/cm |
| 16 Jan 2026, 11:40 | 568 | 568 µS/cm |
| 5 Dec 2025, 11:12 | 707 | 707 µS/cm |
| 12 Nov 2025, 12:02 | 475 | 475 µS/cm |
| 21 Oct 2025, 12:11 | 629 | 629 µS/cm |
| 9 Apr 2025, 12:38 | 852 | 852 µS/cm |
| 21 Mar 2025, 12:56 | 847 | 847 µS/cm |
| 18 Feb 2025, 13:36 | 779 | 779 µS/cm |
| 30 Jan 2025, 15:04 | 755 | 755 µS/cm |
| 10 Dec 2024, 11:38 | 730 | 730 µS/cm |
| 19 Nov 2024, 08:56 | 277 | 277 µS/cm |
| 16 Oct 2024, 11:23 | 631 | 631 µS/cm |
| 23 Sep 2024, 14:01 | 216 | 216 µS/cm |
| 2 Sep 2024, 11:46 | 674 | 674 µS/cm |
| 17 Jul 2024, 09:36 | 727 | 727 µS/cm |
| 27 Jun 2024, 10:49 | 874 | 874 µS/cm |
| 23 May 2024, 10:30 | 558 | 558 µS/cm |
| 26 Apr 2024, 11:39 | 847 | 847 µS/cm |
| 18 Mar 2024, 11:20 | 710 | 710 µS/cm |
| 26 Feb 2024, 11:28 | 798 | 798 µS/cm |
| 23 Jan 2024, 11:11 | 1622 | 1622 µS/cm |
| 7 Dec 2023, 10:20 | 805 | 805 µS/cm |
| 23 Nov 2023, 12:25 | 826 | 826 µS/cm |
| 16 Oct 2023, 10:19 | 781 | 781 µS/cm |
Everything measured here
62 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 62 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 30 | Oct 2023 – Jul 2026 | 47.6% 28 Jul 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 30 | Oct 2023 – Jul 2026 | 4.49 mg/l 28 Jul 2026 |
| Temperature of Water 0076 | River water | 30 | Oct 2023 – Jul 2026 | 18.1 °C 28 Jul 2026 |
| pH 0061 | River water | 30 | Oct 2023 – Jul 2026 | 7.33 28 Jul 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 29 | Oct 2023 – Jul 2026 | below 0.03 mg/l 28 Jul 2026 |
| Nitrate as N 0117 | River water | 29 | Oct 2023 – Jul 2026 | 5 mg/l 28 Jul 2026 |
| Orthophosphate, reactive as P 0180 | River water | 29 | Oct 2023 – Jul 2026 | 0.19 mg/l 28 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 29 | Oct 2023 – Jul 2026 | 763 µS/cm 28 Jul 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 3 | Oct 2023 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 3 | Oct 2023 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 3 | Oct 2023 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 3 | Oct 2023 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 3 | Oct 2023 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 3 | Oct 2023 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 3 | Oct 2023 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 3 | Oct 2023 – Sep 2024 | below 0.004 µg/l 23 Sep 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 3 | Oct 2023 – Sep 2024 | below 0.005 µg/l 23 Sep 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 3 | Oct 2023 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 3 | Oct 2023 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 3 | Oct 2023 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 3 | Oct 2023 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 28 | Oct 2023 – Jul 2026 | 250 mg/l 28 Jul 2026 |
| Ammonia un-ionised as N 0119 | River water | 29 | Oct 2023 – Jul 2026 | below 0.00022 mg/l 28 Jul 2026 |
| BOD : 5 Day ATU 0085 | River water | 21 | Feb 2024 – Mar 2026 | 10 mg/l 27 Mar 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 3 | Oct 2023 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 3 | Oct 2023 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 3 | Oct 2023 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| Nitrite as N 0118 | River water | 29 | Oct 2023 – Jul 2026 | 0.005 mg/l 28 Jul 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 29 | Oct 2023 – Jul 2026 | 5 mg/l 28 Jul 2026 |
| No flow /No sample 7668 | River water | 1 | Aug 2026 – Aug 2026 | No flow/discharge at sampling point 21 Aug 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 3 | Oct 2023 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 3 | Oct 2023 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 3 | Oct 2023 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 3 | Oct 2023 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 3 | Oct 2023 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 3 | Oct 2023 – Sep 2024 | 0.0035 µg/l 23 Sep 2024 |
| Perfluorobutanoic acid 2995 | River water | 3 | Oct 2023 – Sep 2024 | 0.0051 µg/l 23 Sep 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 3 | Oct 2023 – Sep 2024 | 0.0012 µg/l 23 Sep 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 3 | Oct 2023 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| Perfluorodecanoic acid 8892 | River water | 3 | Oct 2023 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 3 | Oct 2023 – Sep 2024 | below 0.005 µg/l 23 Sep 2024 |
| Perfluorododecanoic acid 8894 | River water | 3 | Oct 2023 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 3 | Oct 2023 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluoroheptanoic acid 8889 | River water | 3 | Oct 2023 – Sep 2024 | 0.0019 µg/l 23 Sep 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 3 | Oct 2023 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 3 | Oct 2023 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 3 | Oct 2023 – Sep 2024 | 0.00094 µg/l 23 Sep 2024 |
| Perfluorohexanoic acid 8888 | River water | 3 | Oct 2023 – Sep 2024 | 0.0083 µg/l 23 Sep 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 3 | Oct 2023 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluorononanoic acid 8891 | River water | 3 | Oct 2023 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 3 | Oct 2023 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 3 | Oct 2023 – Sep 2024 | below 0.001 µg/l 23 Sep 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 3 | Oct 2023 – Sep 2024 | 0.0012 µg/l 23 Sep 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 3 | Oct 2023 – Sep 2024 | 0.0023 µg/l 23 Sep 2024 |
| Perfluorooctanoic acid 8890 | River water | 3 | Oct 2023 – Sep 2024 | 0.0025 µg/l 23 Sep 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 3 | Oct 2023 – Sep 2024 | below 0.0005 µg/l 23 Sep 2024 |
| Perfluoropentanoic acid 8887 | River water | 3 | Oct 2023 – Sep 2024 | 0.011 µg/l 23 Sep 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 3 | Oct 2023 – Sep 2024 | below 0.006 µg/l 23 Sep 2024 |
| Perfluorotridecanoic acid 2955 | River water | 3 | Oct 2023 – Sep 2024 | below 0.005 µg/l 23 Sep 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 3 | Oct 2023 – Sep 2024 | below 0.004 µg/l 23 Sep 2024 |
| Perfluoroundecanoic acid 8893 | River water | 3 | Oct 2023 – Sep 2024 | below 0.002 µg/l 23 Sep 2024 |
| Phosphorus, Total as P 0348 | River water | 10 | Jun 2024 – Mar 2025 | 0.096 mg/l 21 Mar 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.