Blackwater at Coleford Bridge
EA name: BLACKWATER AT COLEFORD BRIDGE
Environment Agency sampling point TH-PLDR0008 · 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
- 3 Jul 2026, 15:173 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 33 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 488062, 155936As published, to the nearest 1 m. Open in a map
- River, by its own name
- Blackwater
- River, by the map
- Blackwater RiverPlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- Farnborough On the River Blackwater · 0.2 km along the river
- Nearest gauge upstream
- Tongham On the River Blackwater · 7.8 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (32 samples)
Monitoring (national agency policy) (1 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
69.5%
Sampled 3 Jul 2026, 3 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Jul 2026, 15:17 | 69.5 | 69.5% |
| 5 Jun 2026, 09:46 | 61.8 | 61.8% |
| 8 May 2026, 08:37 | 72.2 | 72.2% |
| 30 Apr 2026, 08:34 | 74.7 | 74.7% |
| 13 Mar 2026, 12:47 | 70.6 | 70.6% |
| 11 Feb 2026, 10:25 | 73.3 | 73.3% |
| 6 Jan 2026, 13:57 | 74 | 74% |
| 11 Dec 2025, 12:33 | 67.8 | 67.8% |
| 5 Nov 2025, 10:19 | 58.5 | 58.5% |
| 13 Oct 2025, 09:53 | 66.2 | 66.2% |
| 25 Sep 2025, 09:47 | 66.9 | 66.9% |
| 14 Aug 2025, 09:44 | 65 | 65% |
| 24 Jul 2025, 09:40 | 59.4 | 59.4% |
| 25 Jun 2025, 11:11 | 63 | 63% |
| 22 May 2025, 11:25 | 40.8 | 40.8% |
| 16 Apr 2025, 13:54 | 78.8 | 78.8% |
| 12 Mar 2025, 10:11 | 68.2 | 68.2% |
| 10 Feb 2025, 12:22 | 73.6 | 73.6% |
| 23 Jan 2025, 12:37 | 81.6 | 81.6% |
| 5 Dec 2024, 10:07 | 72.7 | 72.7% |
| 18 Nov 2024, 11:34 | 65 | 65% |
| 25 Oct 2024, 13:19 | 65.2 | 65.2% |
| 19 Sep 2024, 09:36 | 63.5 | 63.5% |
| 27 Aug 2024, 08:57 | 64.4 | 64.4% |
| 15 Jul 2024, 09:52 | 58.1 | 58.1% |
| 21 Jun 2024, 12:30 | 65.1 | 65.1% |
| 26 Apr 2024, 09:54 | 67.7 | 67.7% |
| 11 Mar 2024, 10:49 | 70 | 70% |
| 5 Feb 2024, 10:36 | 71.8 | 71.8% |
| 22 Jan 2024, 11:06 | 69.1 | 69.1% |
| 6 Dec 2023, 10:24 | 73.4 | 73.4% |
| 1 Nov 2023, 10:51 | 65.2 | 65.2% |
| 3 Oct 2023, 10:17 | 35.8 | 35.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
6.4 mg/l
Sampled 3 Jul 2026, 3 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Jul 2026, 15:17 | 6.4 | 6.4 mg/l |
| 5 Jun 2026, 09:46 | 6.1 | 6.1 mg/l |
| 8 May 2026, 08:37 | 7.69 | 7.69 mg/l |
| 30 Apr 2026, 08:34 | 7.92 | 7.92 mg/l |
| 13 Mar 2026, 12:47 | 7.81 | 7.81 mg/l |
| 11 Feb 2026, 10:25 | 8.22 | 8.22 mg/l |
| 6 Jan 2026, 13:57 | 9.34 | 9.34 mg/l |
| 11 Dec 2025, 12:33 | 7.55 | 7.55 mg/l |
| 5 Nov 2025, 10:19 | 5.97 | 5.97 mg/l |
| 13 Oct 2025, 09:53 | 6.81 | 6.81 mg/l |
| 25 Sep 2025, 09:47 | 7.08 | 7.08 mg/l |
| 14 Aug 2025, 09:44 | 6.01 | 6.01 mg/l |
| 24 Jul 2025, 09:40 | 5.6 | 5.6 mg/l |
| 25 Jun 2025, 11:11 | 5.86 | 5.86 mg/l |
| 22 May 2025, 11:25 | 4.12 | 4.12 mg/l |
| 16 Apr 2025, 13:54 | 8.32 | 8.32 mg/l |
| 12 Mar 2025, 10:11 | 7.85 | 7.85 mg/l |
| 10 Feb 2025, 12:22 | 8.92 | 8.92 mg/l |
| 23 Jan 2025, 12:37 | 9.74 | 9.74 mg/l |
| 5 Dec 2024, 10:07 | 7.94 | 7.94 mg/l |
| 18 Nov 2024, 11:34 | 7.1 | 7.1 mg/l |
| 25 Oct 2024, 13:19 | 6.6 | 6.6 mg/l |
| 19 Sep 2024, 09:36 | 6.15 | 6.15 mg/l |
| 27 Aug 2024, 08:57 | 6.18 | 6.18 mg/l |
| 15 Jul 2024, 09:52 | 5.64 | 5.64 mg/l |
| 21 Jun 2024, 12:30 | 6.21 | 6.21 mg/l |
| 26 Apr 2024, 09:54 | 7.47 | 7.47 mg/l |
| 11 Mar 2024, 10:49 | 7.94 | 7.94 mg/l |
| 5 Feb 2024, 10:36 | 8.01 | 8.01 mg/l |
| 22 Jan 2024, 11:06 | 8.05 | 8.05 mg/l |
| 6 Dec 2023, 10:24 | 8.64 | 8.64 mg/l |
| 1 Nov 2023, 10:51 | 6.82 | 6.82 mg/l |
| 3 Oct 2023, 10:17 | 3.5 | 3.5 mg/l |
Water temperature
code 0076 · °C
19.2 °C
Sampled 3 Jul 2026, 3 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Jul 2026, 15:17 | 19.2 | 19.2 °C |
| 5 Jun 2026, 09:46 | 15.9 | 15.9 °C |
| 8 May 2026, 08:37 | 12.4 | 12.4 °C |
| 30 Apr 2026, 08:34 | 12.6 | 12.6 °C |
| 13 Mar 2026, 12:47 | 10.8 | 10.8 °C |
| 11 Feb 2026, 10:25 | 10.2 | 10.2 °C |
| 6 Jan 2026, 13:57 | 5.4 | 5.4 °C |
| 11 Dec 2025, 12:33 | 10.5 | 10.5 °C |
| 5 Nov 2025, 10:19 | 14.3 | 14.3 °C |
| 13 Oct 2025, 09:53 | 14 | 14 °C |
| 25 Sep 2025, 09:47 | 12.7 | 12.7 °C |
| 14 Aug 2025, 09:44 | 19 | 19 °C |
| 24 Jul 2025, 09:40 | 18.1 | 18.1 °C |
| 25 Jun 2025, 11:11 | 18.7 | 18.7 °C |
| 22 May 2025, 11:25 | 14.8 | 14.8 °C |
| 16 Apr 2025, 13:54 | 12.8 | 12.8 °C |
| 12 Mar 2025, 10:11 | 9.1 | 9.1 °C |
| 10 Feb 2025, 12:22 | 7 | 7 °C |
| 23 Jan 2025, 12:37 | 7.6 | 7.6 °C |
| 5 Dec 2024, 10:07 | 11.3 | 11.3 °C |
| 18 Nov 2024, 11:34 | 11.3 | 11.3 °C |
| 25 Oct 2024, 13:19 | 14.7 | 14.7 °C |
| 19 Sep 2024, 09:36 | 16.8 | 16.8 °C |
| 27 Aug 2024, 08:57 | 17.2 | 17.2 °C |
| 15 Jul 2024, 09:52 | 16.7 | 16.7 °C |
| 21 Jun 2024, 12:30 | 17.5 | 17.5 °C |
| 26 Apr 2024, 09:54 | 10.9 | 10.9 °C |
| 11 Mar 2024, 10:49 | 9.7 | 9.7 °C |
| 5 Feb 2024, 10:36 | 10.4 | 10.4 °C |
| 22 Jan 2024, 11:06 | 8.6 | 8.6 °C |
| 6 Dec 2023, 10:24 | 8.2 | 8.2 °C |
| 1 Nov 2023, 10:51 | 13.2 | 13.2 °C |
| 3 Oct 2023, 10:17 | 16.3 | 16.3 °C |
pH
code 0061
7.41
Sampled 3 Jul 2026, 3 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Jul 2026, 15:17 | 7.41 | 7.41 |
| 5 Jun 2026, 09:46 | 7.28 | 7.28 |
| 8 May 2026, 08:37 | 7.37 | 7.37 |
| 30 Apr 2026, 08:34 | 7.35 | 7.35 |
| 13 Mar 2026, 12:47 | 7.33 | 7.33 |
| 11 Feb 2026, 10:25 | 7.3 | 7.3 |
| 6 Jan 2026, 13:57 | 7.18 | 7.18 |
| 11 Dec 2025, 12:33 | 7.54 | 7.54 |
| 5 Nov 2025, 10:19 | 7.28 | 7.28 |
| 13 Oct 2025, 09:53 | 7.22 | 7.22 |
| 25 Sep 2025, 09:47 | 7.26 | 7.26 |
| 14 Aug 2025, 09:44 | 7.51 | 7.51 |
| 24 Jul 2025, 09:40 | 7.47 | 7.47 |
| 25 Jun 2025, 11:11 | 6.7 | 6.7 |
| 22 May 2025, 11:25 | 7.17 | 7.17 |
| 16 Apr 2025, 13:54 | 7.45 | 7.45 |
| 12 Mar 2025, 10:11 | 7.47 | 7.47 |
| 10 Feb 2025, 12:22 | 7.3 | 7.3 |
| 23 Jan 2025, 12:37 | 7.39 | 7.39 |
| 5 Dec 2024, 10:07 | 7.3 | 7.3 |
| 18 Nov 2024, 11:34 | 7.39 | 7.39 |
| 25 Oct 2024, 13:19 | 7.09 | 7.09 |
| 19 Sep 2024, 09:36 | 7.11 | 7.11 |
| 27 Aug 2024, 08:57 | 7.47 | 7.47 |
| 15 Jul 2024, 09:52 | 7.47 | 7.47 |
| 21 Jun 2024, 12:30 | 7.5 | 7.5 |
| 26 Apr 2024, 09:54 | 7.52 | 7.52 |
| 11 Mar 2024, 10:49 | 7.47 | 7.47 |
| 5 Feb 2024, 10:36 | 7.28 | 7.28 |
| 22 Jan 2024, 11:06 | 7.4 | 7.4 |
| 6 Dec 2023, 10:24 | 7.38 | 7.38 |
| 1 Nov 2023, 10:51 | 7.39 | 7.39 |
| 3 Oct 2023, 10:17 | 7.31 | 7.31 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 3 Jul 2026, 3 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Jul 2026, 15:17 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Jun 2026, 09:46 | 0.052 | 0.052 mg/l |
| 8 May 2026, 08:37 | 0.051 | 0.051 mg/l |
| 30 Apr 2026, 08:34 | 0.046 | 0.046 mg/l |
| 13 Mar 2026, 12:47 | 0.17 | 0.17 mg/l |
| 11 Feb 2026, 10:25 | 0.22 | 0.22 mg/l |
| 6 Jan 2026, 13:57 | 0.58 | 0.58 mg/l |
| 11 Dec 2025, 12:33 | 0.19 | 0.19 mg/l |
| 5 Nov 2025, 10:19 | 0.075 | 0.075 mg/l |
| 13 Oct 2025, 09:53 | 0.038 | 0.038 mg/l |
| 25 Sep 2025, 09:47 | 0.059 | 0.059 mg/l |
| 14 Aug 2025, 09:44 | 0.045 | 0.045 mg/l |
| 24 Jul 2025, 09:40 | 0.037 | 0.037 mg/l |
| 25 Jun 2025, 11:11 | 0.045 | 0.045 mg/l |
| 22 May 2025, 11:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Apr 2025, 13:54 | 0.1 | 0.1 mg/l |
| 12 Mar 2025, 10:11 | 0.21 | 0.21 mg/l |
| 10 Feb 2025, 12:22 | 1.1 | 1.1 mg/l |
| 23 Jan 2025, 12:37 | 0.29 | 0.29 mg/l |
| 18 Nov 2024, 11:34 | 0.28 | 0.28 mg/l |
| 25 Oct 2024, 13:19 | 0.11 | 0.11 mg/l |
| 19 Sep 2024, 09:36 | 0.041 | 0.041 mg/l |
| 27 Aug 2024, 08:57 | 0.046 | 0.046 mg/l |
| 15 Jul 2024, 09:52 | 0.058 | 0.058 mg/l |
| 21 Jun 2024, 12:30 | 0.065 | 0.065 mg/l |
| 11 Mar 2024, 10:49 | 0.38 | 0.38 mg/l |
| 5 Feb 2024, 10:36 | 0.46 | 0.46 mg/l |
| 22 Jan 2024, 11:06 | 1.5 | 1.5 mg/l |
| 6 Dec 2023, 10:24 | 0.31 | 0.31 mg/l |
| 1 Nov 2023, 10:51 | 0.17 | 0.17 mg/l |
| 3 Oct 2023, 10:17 | 0.31 | 0.31 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
18 mg/l
Sampled 3 Jul 2026, 3 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Jul 2026, 15:17 | 18 | 18 mg/l |
| 5 Jun 2026, 09:46 | 9.94 | 9.94 mg/l |
| 8 May 2026, 08:37 | 15.9 | 15.9 mg/l |
| 30 Apr 2026, 08:34 | 16.9 | 16.9 mg/l |
| 13 Mar 2026, 12:47 | 8.32 | 8.32 mg/l |
| 11 Feb 2026, 10:25 | 5.72 | 5.72 mg/l |
| 6 Jan 2026, 13:57 | 13.8 | 13.8 mg/l |
| 11 Dec 2025, 12:33 | 9.36 | 9.36 mg/l |
| 5 Nov 2025, 10:19 | 11.9 | 11.9 mg/l |
| 13 Oct 2025, 09:53 | 16 | 16 mg/l |
| 25 Sep 2025, 09:47 | 15.9 | 15.9 mg/l |
| 14 Aug 2025, 09:44 | 16 | 16 mg/l |
| 24 Jul 2025, 09:40 | 12.9 | 12.9 mg/l |
| 25 Jun 2025, 11:11 | 11.9 | 11.9 mg/l |
| 22 May 2025, 11:25 | 12.8 | 12.8 mg/l |
| 16 Apr 2025, 13:54 | 12.9 | 12.9 mg/l |
| 12 Mar 2025, 10:11 | 10.9 | 10.9 mg/l |
| 10 Feb 2025, 12:22 | 5.28 | 5.28 mg/l |
| 23 Jan 2025, 12:37 | 11.9 | 11.9 mg/l |
| 18 Nov 2024, 11:34 | 12.9 | 12.9 mg/l |
| 25 Oct 2024, 13:19 | 10.9 | 10.9 mg/l |
| 19 Sep 2024, 09:36 | 13 | 13 mg/l |
| 27 Aug 2024, 08:57 | 9.97 | 9.97 mg/l |
| 15 Jul 2024, 09:52 | 7.05 | 7.05 mg/l |
| 21 Jun 2024, 12:30 | 12.9 | 12.9 mg/l |
| 11 Mar 2024, 10:49 | 7.08 | 7.08 mg/l |
| 22 Jan 2024, 11:06 | 3.48 | 3.48 mg/l |
| 6 Dec 2023, 10:24 | 6.19 | 6.19 mg/l |
| 1 Nov 2023, 10:51 | 5.14 | 5.14 mg/l |
| 3 Oct 2023, 10:17 | 9.55 | 9.55 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.49 mg/l
Sampled 3 Jul 2026, 3 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Jul 2026, 15:17 | 0.49 | 0.49 mg/l |
| 5 Jun 2026, 09:46 | 0.38 | 0.38 mg/l |
| 8 May 2026, 08:37 | 0.46 | 0.46 mg/l |
| 30 Apr 2026, 08:34 | 0.41 | 0.41 mg/l |
| 13 Mar 2026, 12:47 | 0.22 | 0.22 mg/l |
| 11 Feb 2026, 10:25 | 0.17 | 0.17 mg/l |
| 6 Jan 2026, 13:57 | 0.18 | 0.18 mg/l |
| 11 Dec 2025, 12:33 | 0.16 | 0.16 mg/l |
| 5 Nov 2025, 10:19 | 0.12 | 0.12 mg/l |
| 13 Oct 2025, 09:53 | 0.3 | 0.3 mg/l |
| 25 Sep 2025, 09:47 | 0.47 | 0.47 mg/l |
| 14 Aug 2025, 09:44 | 0.29 | 0.29 mg/l |
| 24 Jul 2025, 09:40 | 0.32 | 0.32 mg/l |
| 25 Jun 2025, 11:11 | 0.55 | 0.55 mg/l |
| 22 May 2025, 11:25 | 0.18 | 0.18 mg/l |
| 16 Apr 2025, 13:54 | 0.31 | 0.31 mg/l |
| 12 Mar 2025, 10:11 | 0.29 | 0.29 mg/l |
| 10 Feb 2025, 12:22 | 0.14 | 0.14 mg/l |
| 23 Jan 2025, 12:37 | 0.12 | 0.12 mg/l |
| 18 Nov 2024, 11:34 | 0.23 | 0.23 mg/l |
| 25 Oct 2024, 13:19 | 0.2 | 0.2 mg/l |
| 19 Sep 2024, 09:36 | 0.37 | 0.37 mg/l |
| 27 Aug 2024, 08:57 | 0.39 | 0.39 mg/l |
| 15 Jul 2024, 09:52 | 0.34 | 0.34 mg/l |
| 21 Jun 2024, 12:30 | 0.3 | 0.3 mg/l |
| 11 Mar 2024, 10:49 | 0.09 | 0.09 mg/l |
| 5 Feb 2024, 10:36 | 0.12 | 0.12 mg/l |
| 22 Jan 2024, 11:06 | 0.27 | 0.27 mg/l |
| 6 Dec 2023, 10:24 | 0.11 | 0.11 mg/l |
| 1 Nov 2023, 10:51 | 0.11 | 0.11 mg/l |
| 3 Oct 2023, 10:17 | 0.14 | 0.14 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
803 µS/cm
Sampled 3 Jul 2026, 3 months ago · 33 results banked
Every result (33)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Jul 2026, 15:17 | 803 | 803 µS/cm |
| 5 Jun 2026, 09:46 | 618 | 618 µS/cm |
| 8 May 2026, 08:37 | 757 | 757 µS/cm |
| 30 Apr 2026, 08:34 | 764 | 764 µS/cm |
| 13 Mar 2026, 12:47 | 532 | 532 µS/cm |
| 11 Feb 2026, 10:25 | 557 | 557 µS/cm |
| 6 Jan 2026, 13:57 | 756 | 756 µS/cm |
| 11 Dec 2025, 12:33 | 633 | 633 µS/cm |
| 5 Nov 2025, 10:19 | 685 | 685 µS/cm |
| 13 Oct 2025, 09:53 | 829 | 829 µS/cm |
| 25 Sep 2025, 09:47 | 816 | 816 µS/cm |
| 14 Aug 2025, 09:44 | 825 | 825 µS/cm |
| 24 Jul 2025, 09:40 | 803 | 803 µS/cm |
| 25 Jun 2025, 11:11 | 966 | 966 µS/cm |
| 22 May 2025, 11:25 | 711 | 711 µS/cm |
| 16 Apr 2025, 13:54 | 753 | 753 µS/cm |
| 12 Mar 2025, 10:11 | 718 | 718 µS/cm |
| 10 Feb 2025, 12:22 | 660 | 660 µS/cm |
| 23 Jan 2025, 12:37 | 720 | 720 µS/cm |
| 5 Dec 2024, 10:07 | 669 | 669 µS/cm |
| 18 Nov 2024, 11:34 | 713 | 713 µS/cm |
| 25 Oct 2024, 13:19 | 711 | 711 µS/cm |
| 19 Sep 2024, 09:36 | 785 | 785 µS/cm |
| 27 Aug 2024, 08:57 | 694 | 694 µS/cm |
| 15 Jul 2024, 09:52 | 650 | 650 µS/cm |
| 21 Jun 2024, 12:30 | 722 | 722 µS/cm |
| 26 Apr 2024, 09:54 | 714 | 714 µS/cm |
| 11 Mar 2024, 10:49 | 650 | 650 µS/cm |
| 5 Feb 2024, 10:36 | 747 | 747 µS/cm |
| 22 Jan 2024, 11:06 | 667 | 667 µS/cm |
| 6 Dec 2023, 10:24 | 604 | 604 µS/cm |
| 1 Nov 2023, 10:51 | 523 | 523 µS/cm |
| 3 Oct 2023, 10:17 | 749 | 749 µS/cm |
Everything measured here
68 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 68 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 33 | Oct 2023 – Jul 2026 | 69.5% 3 Jul 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 33 | Oct 2023 – Jul 2026 | 6.4 mg/l 3 Jul 2026 |
| Temperature of Water 0076 | River water | 33 | Oct 2023 – Jul 2026 | 19.2 °C 3 Jul 2026 |
| pH 0061 | River water | 33 | Oct 2023 – Jul 2026 | 7.41 3 Jul 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 31 | Oct 2023 – Jul 2026 | below 0.03 mg/l 3 Jul 2026 |
| Nitrate as N 0117 | River water | 30 | Oct 2023 – Jul 2026 | 18 mg/l 3 Jul 2026 |
| Orthophosphate, reactive as P 0180 | River water | 31 | Oct 2023 – Jul 2026 | 0.49 mg/l 3 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 33 | Oct 2023 – Jul 2026 | 803 µS/cm 3 Jul 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Jan 2024 – Jan 2024 | below 0.001 µg/l 22 Jan 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Jan 2024 – Jan 2024 | below 0.001 µg/l 22 Jan 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Jan 2024 – Jan 2024 | below 0.001 µg/l 22 Jan 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Jan 2024 – Jan 2024 | below 0.002 µg/l 22 Jan 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Jan 2024 – Jan 2024 | below 0.0005 µg/l 22 Jan 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Jan 2024 – Jan 2024 | below 0.001 µg/l 22 Jan 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | Jan 2024 – Jan 2024 | below 0.0005 µg/l 22 Jan 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Jan 2024 – Jan 2024 | below 0.004 µg/l 22 Jan 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Jan 2024 – Jan 2024 | below 0.0005 µg/l 22 Jan 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Jan 2024 – Jan 2024 | 0.098 µg/l 22 Jan 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Jan 2024 – Jan 2024 | below 0.001 µg/l 22 Jan 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | Jan 2024 – Jan 2024 | below 0.0005 µg/l 22 Jan 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 31 | Oct 2023 – Jul 2026 | 120 mg/l 3 Jul 2026 |
| Ammonia un-ionised as N 0119 | River water | 31 | Oct 2023 – Jul 2026 | below 0.00028 mg/l 3 Jul 2026 |
| BOD : 5 Day ATU 0085 | River water | 28 | Oct 2023 – May 2026 | below 4 mg/l 8 May 2026 |
| Cadmium, Dissolved 0106 | River water | 2 | Oct 2023 – Jan 2024 | 0.014 µg/l 22 Jan 2024 |
| Calcium, Dissolved 0239 | River water | 2 | Oct 2023 – Jan 2024 | 58 mg/l 22 Jan 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 2 | Oct 2023 – Jan 2024 | 7 mg/l 22 Jan 2024 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Jan 2024 – Jan 2024 | below 0.001 µg/l 22 Jan 2024 |
| Lead : BLM Bioavailable 3377 | River water | 2 | Oct 2023 – Jan 2024 | 0.04 µg/l 22 Jan 2024 |
| Lead, Dissolved 0052 | River water | 2 | Oct 2023 – Jan 2024 | 0.25 µg/l 22 Jan 2024 |
| Magnesium, Dissolved 0235 | River water | 2 | Oct 2023 – Jan 2024 | 4.9 mg/l 22 Jan 2024 |
| Mercury, Dissolved 0103 | River water | 2 | Oct 2023 – Jan 2024 | below 0.01 µg/l 22 Jan 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Jan 2024 – Jan 2024 | below 0.002 µg/l 22 Jan 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Jan 2024 – Jan 2024 | below 0.002 µg/l 22 Jan 2024 |
| Nickel : BLM Bioavailable 3878 | River water | 2 | Oct 2023 – Jan 2024 | 0.55 µg/l 22 Jan 2024 |
| Nickel, Dissolved 3410 | River water | 2 | Oct 2023 – Jan 2024 | 2.4 µg/l 22 Jan 2024 |
| Nitrite as N 0118 | River water | 30 | Oct 2023 – Jul 2026 | 0.028 mg/l 3 Jul 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 31 | Oct 2023 – Jul 2026 | 18 mg/l 3 Jul 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Jan 2024 – Jan 2024 | below 0.0005 µg/l 22 Jan 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Jan 2024 – Jan 2024 | below 0.0005 µg/l 22 Jan 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | Jan 2024 – Jan 2024 | below 0.0005 µg/l 22 Jan 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Jan 2024 – Jan 2024 | below 0.0005 µg/l 22 Jan 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Jan 2024 – Jan 2024 | below 0.0005 µg/l 22 Jan 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Jan 2024 – Jan 2024 | 0.0049 µg/l 22 Jan 2024 |
| Perfluorobutanoic acid 2995 | River water | 1 | Jan 2024 – Jan 2024 | 0.0057 µg/l 22 Jan 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Jan 2024 – Jan 2024 | 0.0014 µg/l 22 Jan 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Jan 2024 – Jan 2024 | below 0.002 µg/l 22 Jan 2024 |
| Perfluorodecanoic acid 8892 | River water | 1 | Jan 2024 – Jan 2024 | below 0.002 µg/l 22 Jan 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Jan 2024 – Jan 2024 | below 0.005 µg/l 22 Jan 2024 |
| Perfluorododecanoic acid 8894 | River water | 1 | Jan 2024 – Jan 2024 | below 0.002 µg/l 22 Jan 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Jan 2024 – Jan 2024 | below 0.0005 µg/l 22 Jan 2024 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Jan 2024 – Jan 2024 | 0.0018 µg/l 22 Jan 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Jan 2024 – Jan 2024 | below 0.0005 µg/l 22 Jan 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Jan 2024 – Jan 2024 | 0.00052 µg/l 22 Jan 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Jan 2024 – Jan 2024 | 0.0025 µg/l 22 Jan 2024 |
| Perfluorohexanoic acid 8888 | River water | 1 | Jan 2024 – Jan 2024 | 0.0039 µg/l 22 Jan 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Jan 2024 – Jan 2024 | below 0.0005 µg/l 22 Jan 2024 |
| Perfluorononanoic acid 8891 | River water | 1 | Jan 2024 – Jan 2024 | below 0.001 µg/l 22 Jan 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | Jan 2024 – Jan 2024 | below 0.002 µg/l 22 Jan 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Jan 2024 – Jan 2024 | below 0.001 µg/l 22 Jan 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Jan 2024 – Jan 2024 | 0.0019 µg/l 22 Jan 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Jan 2024 – Jan 2024 | 0.0029 µg/l 22 Jan 2024 |
| Perfluorooctanoic acid 8890 | River water | 1 | Jan 2024 – Jan 2024 | 0.0035 µg/l 22 Jan 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Jan 2024 – Jan 2024 | below 0.0005 µg/l 22 Jan 2024 |
| Perfluoropentanoic acid 8887 | River water | 1 | Jan 2024 – Jan 2024 | 0.0037 µg/l 22 Jan 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Jan 2024 – Jan 2024 | below 0.006 µg/l 22 Jan 2024 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Jan 2024 – Jan 2024 | below 0.005 µg/l 22 Jan 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Jan 2024 – Jan 2024 | below 0.004 µg/l 22 Jan 2024 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Jan 2024 – Jan 2024 | below 0.002 µg/l 22 Jan 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.