Ray (Oxon) at Arncott Bridge
EA name: RAY ( OXON ) AT ARNCOTT BRIDGE
Environment Agency sampling point TH-PCHR0039 · 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
- 27 Mar 2026, 09:506 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone). Not sampled since, as far as the archive shows: the Environment Agency was asked up to 30 Sep 2026 and had nothing newer.
- Samples banked
- 32 since 26 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 460751, 218425As published, to the nearest 1 m. Open in a map
- River, by its own name
- Ray
- River, by the map
- River RayPlaced on the river its name gives, 6 m from the line.
- Next gauge downstream
- Islip On the River Ray · 12 km along the riverBeside Lower Arncott: too close to say above or below.
- Nearest gauge upstream
- Grendon Underwood On the River Ray · 11 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (29 samples)
Monitoring (national agency policy) (3 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
87.9%
Sampled 27 Mar 2026, 6 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Mar 2026, 09:50 | 87.9 | 87.9% |
| 2 Feb 2026, 12:06 | 72.4 | 72.4% |
| 6 Jan 2026, 12:58 | 78.8 | 78.8% |
| 10 Dec 2025, 12:39 | 64.6 | 64.6% |
| 20 Nov 2025, 13:09 | 75.1 | 75.1% |
| 1 Oct 2025, 12:28 | 54.9 | 54.9% |
| 8 Sep 2025, 10:26 | 47.3 | 47.3% |
| 22 Aug 2025, 10:31 | 51.4 | 51.4% |
| 29 Jul 2025, 10:32 | 45.3 | 45.3% |
| 24 Jun 2025, 12:38 | 76.2 | 76.2% |
| 6 May 2025, 11:22 | 91.6 | 91.6% |
| 11 Apr 2025, 13:10 | 104.3 | 104.3% |
| 13 Mar 2025, 10:24 | 85 | 85% |
| 7 Feb 2025, 11:56 | 89.3 | 89.3% |
| 21 Jan 2025, 12:39 | 87.1 | 87.1% |
| 2 Dec 2024, 12:58 | 68.4 | 68.4% |
| 18 Nov 2024, 12:58 | 77.9 | 77.9% |
| 16 Oct 2024, 12:23 | 72.1 | 72.1% |
| 19 Sep 2024, 09:55 | 67.9 | 67.9% |
| 22 Aug 2024, 11:47 | 70.5 | 70.5% |
| 17 Jul 2024, 11:53 | 53.6 | 53.6% |
| 24 Jun 2024, 11:21 | 62.4 | 62.4% |
| 24 May 2024, 12:50 | 68.2 | 68.2% |
| 18 Apr 2024, 10:45 | 83.1 | 83.1% |
| 19 Mar 2024, 10:41 | 79.1 | 79.1% |
| 22 Feb 2024, 08:41 | 65.2 | 65.2% |
| 16 Jan 2024, 11:07 | 77.6 | 77.6% |
| 8 Dec 2023, 11:07 | 68 | 68% |
| 23 Nov 2023, 10:32 | 52.4 | 52.4% |
| 9 Nov 2023, 09:15 | 46 | 46% |
| 26 Oct 2023, 11:48 | 42.3 | 42.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.5 mg/l
Sampled 27 Mar 2026, 6 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Mar 2026, 09:50 | 10.5 | 10.5 mg/l |
| 2 Feb 2026, 12:06 | 8.8 | 8.8 mg/l |
| 6 Jan 2026, 12:58 | 11.5 | 11.5 mg/l |
| 10 Dec 2025, 12:39 | 7.37 | 7.37 mg/l |
| 20 Nov 2025, 13:09 | 9.7 | 9.7 mg/l |
| 1 Oct 2025, 12:28 | 6.14 | 6.14 mg/l |
| 8 Sep 2025, 10:26 | 4.69 | 4.69 mg/l |
| 22 Aug 2025, 10:31 | 5.34 | 5.34 mg/l |
| 29 Jul 2025, 10:32 | 4.48 | 4.48 mg/l |
| 24 Jun 2025, 12:38 | 7.28 | 7.28 mg/l |
| 6 May 2025, 11:22 | 10.2 | 10.2 mg/l |
| 11 Apr 2025, 13:10 | 11.4 | 11.4 mg/l |
| 13 Mar 2025, 10:24 | 10.8 | 10.8 mg/l |
| 7 Feb 2025, 11:56 | 11.8 | 11.8 mg/l |
| 21 Jan 2025, 12:39 | 11.4 | 11.4 mg/l |
| 2 Dec 2024, 12:58 | 7.86 | 7.86 mg/l |
| 18 Nov 2024, 12:58 | 9.26 | 9.26 mg/l |
| 16 Oct 2024, 12:23 | 7.6 | 7.6 mg/l |
| 19 Sep 2024, 09:55 | 6.95 | 6.95 mg/l |
| 22 Aug 2024, 11:47 | 6.98 | 6.98 mg/l |
| 17 Jul 2024, 11:53 | 5.25 | 5.25 mg/l |
| 24 Jun 2024, 11:21 | 5.86 | 5.86 mg/l |
| 24 May 2024, 12:50 | 6.9 | 6.9 mg/l |
| 18 Apr 2024, 10:45 | 9.66 | 9.66 mg/l |
| 19 Mar 2024, 10:41 | 8.87 | 8.87 mg/l |
| 22 Feb 2024, 08:41 | 7.58 | 7.58 mg/l |
| 16 Jan 2024, 11:07 | 10.7 | 10.7 mg/l |
| 8 Dec 2023, 11:07 | 8.58 | 8.58 mg/l |
| 23 Nov 2023, 10:32 | 6.06 | 6.06 mg/l |
| 9 Nov 2023, 09:15 | 5.43 | 5.43 mg/l |
| 26 Oct 2023, 11:48 | 4.6 | 4.6 mg/l |
Water temperature
code 0076 · °C
7.4 °C
Sampled 27 Mar 2026, 6 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Mar 2026, 09:50 | 7.4 | 7.4 °C |
| 2 Feb 2026, 12:06 | 6.9 | 6.9 °C |
| 6 Jan 2026, 12:58 | 0.1 | 0.1 °C |
| 10 Dec 2025, 12:39 | 9.5 | 9.5 °C |
| 20 Nov 2025, 13:09 | 4.5 | 4.5 °C |
| 1 Oct 2025, 12:28 | 10.3 | 10.3 °C |
| 8 Sep 2025, 10:26 | 15.7 | 15.7 °C |
| 22 Aug 2025, 10:31 | 13.5 | 13.5 °C |
| 29 Jul 2025, 10:32 | 15.8 | 15.8 °C |
| 24 Jun 2025, 12:38 | 17.4 | 17.4 °C |
| 6 May 2025, 11:22 | 10.5 | 10.5 °C |
| 11 Apr 2025, 13:10 | 11.2 | 11.2 °C |
| 13 Mar 2025, 10:24 | 5 | 5 °C |
| 7 Feb 2025, 11:56 | 3.5 | 3.5 °C |
| 21 Jan 2025, 12:39 | 3.9 | 3.9 °C |
| 2 Dec 2024, 12:58 | 9.2 | 9.2 °C |
| 18 Nov 2024, 12:58 | 7.8 | 7.8 °C |
| 16 Oct 2024, 12:23 | 12.9 | 12.9 °C |
| 19 Sep 2024, 09:55 | 14.2 | 14.2 °C |
| 22 Aug 2024, 11:47 | 15.7 | 15.7 °C |
| 17 Jul 2024, 11:53 | 16.2 | 16.2 °C |
| 24 Jun 2024, 11:21 | 18.3 | 18.3 °C |
| 24 May 2024, 12:50 | 14.7 | 14.7 °C |
| 18 Apr 2024, 10:45 | 8.7 | 8.7 °C |
| 19 Mar 2024, 10:41 | 10.2 | 10.2 °C |
| 22 Feb 2024, 08:41 | 8.7 | 8.7 °C |
| 16 Jan 2024, 11:07 | 1.9 | 1.9 °C |
| 8 Dec 2023, 11:07 | 5.4 | 5.4 °C |
| 23 Nov 2023, 10:32 | 8.9 | 8.9 °C |
| 9 Nov 2023, 09:15 | 8.1 | 8.1 °C |
| 26 Oct 2023, 11:48 | 11.5 | 11.5 °C |
pH
code 0061
8.33
Sampled 27 Mar 2026, 6 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Mar 2026, 09:50 | 8.33 | 8.33 |
| 2 Feb 2026, 12:06 | 7.6 | 7.6 |
| 6 Jan 2026, 12:58 | 8.06 | 8.06 |
| 10 Dec 2025, 12:39 | 7.53 | 7.53 |
| 20 Nov 2025, 13:09 | 7.64 | 7.64 |
| 1 Oct 2025, 12:28 | 7.46 | 7.46 |
| 8 Sep 2025, 10:26 | 7.39 | 7.39 |
| 22 Aug 2025, 10:31 | 7.31 | 7.31 |
| 29 Jul 2025, 10:32 | 7.26 | 7.26 |
| 24 Jun 2025, 12:38 | 7.51 | 7.51 |
| 6 May 2025, 11:22 | 8.23 | 8.23 |
| 11 Apr 2025, 13:10 | 8.15 | 8.15 |
| 13 Mar 2025, 10:24 | 7.9 | 7.9 |
| 7 Feb 2025, 11:56 | 7.88 | 7.88 |
| 21 Jan 2025, 12:39 | 7.9 | 7.9 |
| 2 Dec 2024, 12:58 | 7.48 | 7.48 |
| 18 Nov 2024, 12:58 | 7.81 | 7.81 |
| 16 Oct 2024, 12:23 | 7.51 | 7.51 |
| 19 Sep 2024, 09:55 | 7.56 | 7.56 |
| 22 Aug 2024, 11:47 | 7.69 | 7.69 |
| 17 Jul 2024, 11:53 | 7.66 | 7.66 |
| 24 Jun 2024, 11:21 | 7.54 | 7.54 |
| 24 May 2024, 12:50 | 7.69 | 7.69 |
| 18 Apr 2024, 10:45 | 8.06 | 8.06 |
| 19 Mar 2024, 10:41 | 7.75 | 7.75 |
| 22 Feb 2024, 08:41 | 7.71 | 7.71 |
| 16 Jan 2024, 11:07 | 7.77 | 7.77 |
| 8 Dec 2023, 11:07 | 7.54 | 7.54 |
| 23 Nov 2023, 10:32 | 7.56 | 7.56 |
| 9 Nov 2023, 09:15 | 7.38 | 7.38 |
| 26 Oct 2023, 11:48 | 7.34 | 7.34 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.042 mg/l
Sampled 27 Mar 2026, 6 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Mar 2026, 09:50 | 0.042 | 0.042 mg/l |
| 2 Feb 2026, 12:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Jan 2026, 12:58 | 0.28 | 0.28 mg/l |
| 10 Dec 2025, 12:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Nov 2025, 13:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Oct 2025, 12:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Sep 2025, 10:26 | 0.032 | 0.032 mg/l |
| 22 Aug 2025, 10:31 | 0.047 | 0.047 mg/l |
| 29 Jul 2025, 10:32 | 0.042 | 0.042 mg/l |
| 24 Jun 2025, 12:38 | 0.073 | 0.073 mg/l |
| 6 May 2025, 11:22 | 0.045 | 0.045 mg/l |
| 11 Apr 2025, 13:10 | 0.054 | 0.054 mg/l |
| 13 Mar 2025, 10:24 | 0.098 | 0.098 mg/l |
| 7 Feb 2025, 11:56 | 0.084 | 0.084 mg/l |
| 21 Jan 2025, 12:39 | 0.18 | 0.18 mg/l |
| 2 Dec 2024, 12:58 | 0.04 | 0.04 mg/l |
| 18 Nov 2024, 12:58 | 0.19 | 0.19 mg/l |
| 16 Oct 2024, 12:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Sep 2024, 09:55 | 0.038 | 0.038 mg/l |
| 22 Aug 2024, 11:47 | 0.037 | 0.037 mg/l |
| 17 Jul 2024, 11:53 | 0.17 | 0.17 mg/l |
| 24 Jun 2024, 11:21 | 0.069 | 0.069 mg/l |
| 24 May 2024, 12:50 | 0.094 | 0.094 mg/l |
| 18 Apr 2024, 10:45 | 0.15 | 0.15 mg/l |
| 19 Mar 2024, 10:41 | 0.077 | 0.077 mg/l |
| 22 Feb 2024, 08:41 | 0.039 | 0.039 mg/l |
| 16 Jan 2024, 11:07 | 0.19 | 0.19 mg/l |
| 8 Dec 2023, 11:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Nov 2023, 10:32 | 0.03 | 0.03 mg/l |
| 9 Nov 2023, 09:15 | 0.031 | 0.031 mg/l |
| 26 Oct 2023, 11:48 | 0.06 | 0.06 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
3.49 mg/l
Sampled 27 Mar 2026, 6 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Mar 2026, 09:50 | 3.49 | 3.49 mg/l |
| 2 Feb 2026, 12:06 | 2.99 | 2.99 mg/l |
| 6 Jan 2026, 12:58 | 4.45 | 4.45 mg/l |
| 10 Dec 2025, 12:39 | 6.38 | 6.38 mg/l |
| 20 Nov 2025, 13:09 | 11 | 11 mg/l |
| 1 Oct 2025, 12:28 | 8.17 | 8.17 mg/l |
| 8 Sep 2025, 10:26 | 2.08 | 2.08 mg/l |
| 22 Aug 2025, 10:31 | 1.48 | 1.48 mg/l |
| 29 Jul 2025, 10:32 | 3.43 | 3.43 mg/l |
| 24 Jun 2025, 12:38 | 1.09 | 1.09 mg/l |
| 6 May 2025, 11:22 | 4.98 | 4.98 mg/l |
| 11 Apr 2025, 13:10 | 4.68 | 4.68 mg/l |
| 13 Mar 2025, 10:24 | 2.67 | 2.67 mg/l |
| 7 Feb 2025, 11:56 | 2.08 | 2.08 mg/l |
| 21 Jan 2025, 12:39 | 2.26 | 2.26 mg/l |
| 2 Dec 2024, 12:58 | 1.38 | 1.38 mg/l |
| 18 Nov 2024, 12:58 | 3.15 | 3.15 mg/l |
| 16 Oct 2024, 12:23 | 1.99 | 1.99 mg/l |
| 19 Sep 2024, 09:55 | 5.47 | 5.47 mg/l |
| 22 Aug 2024, 11:47 | 4.88 | 4.88 mg/l |
| 17 Jul 2024, 11:53 | 3.82 | 3.82 mg/l |
| 24 Jun 2024, 11:21 | 3.95 | 3.95 mg/l |
| 24 May 2024, 12:50 | 3.73 | 3.73 mg/l |
| 18 Apr 2024, 10:45 | 2.26 | 2.26 mg/l |
| 19 Mar 2024, 10:41 | 1.38 | 1.38 mg/l |
| 22 Feb 2024, 08:41 | 0.846 | 0.846 mg/l |
| 16 Jan 2024, 11:07 | 2.57 | 2.57 mg/l |
| 8 Dec 2023, 11:07 | 2.69 | 2.69 mg/l |
| 23 Nov 2023, 10:32 | 2.08 | 2.08 mg/l |
| 9 Nov 2023, 09:15 | 1.69 | 1.69 mg/l |
| 26 Oct 2023, 11:48 | 1.97 | 1.97 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.31 mg/l
Sampled 27 Mar 2026, 6 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Mar 2026, 09:50 | 0.31 | 0.31 mg/l |
| 2 Feb 2026, 12:06 | 0.094 | 0.094 mg/l |
| 6 Jan 2026, 12:58 | 0.17 | 0.17 mg/l |
| 10 Dec 2025, 12:39 | 0.14 | 0.14 mg/l |
| 20 Nov 2025, 13:09 | 0.13 | 0.13 mg/l |
| 1 Oct 2025, 12:28 | 0.47 | 0.47 mg/l |
| 8 Sep 2025, 10:26 | 0.51 | 0.51 mg/l |
| 22 Aug 2025, 10:31 | 0.79 | 0.79 mg/l |
| 29 Jul 2025, 10:32 | 0.96 | 0.96 mg/l |
| 24 Jun 2025, 12:38 | 0.71 | 0.71 mg/l |
| 6 May 2025, 11:22 | 0.5 | 0.5 mg/l |
| 11 Apr 2025, 13:10 | 0.39 | 0.39 mg/l |
| 13 Mar 2025, 10:24 | 0.22 | 0.22 mg/l |
| 7 Feb 2025, 11:56 | 0.15 | 0.15 mg/l |
| 21 Jan 2025, 12:39 | 0.19 | 0.19 mg/l |
| 2 Dec 2024, 12:58 | 0.13 | 0.13 mg/l |
| 18 Nov 2024, 12:58 | 0.41 | 0.41 mg/l |
| 16 Oct 2024, 12:23 | 0.12 | 0.12 mg/l |
| 19 Sep 2024, 09:55 | 0.97 | 0.97 mg/l |
| 22 Aug 2024, 11:47 | 1.1 | 1.1 mg/l |
| 17 Jul 2024, 11:53 | 0.4 | 0.4 mg/l |
| 24 Jun 2024, 11:21 | 0.48 | 0.48 mg/l |
| 24 May 2024, 12:50 | 0.12 | 0.12 mg/l |
| 18 Apr 2024, 10:45 | 0.18 | 0.18 mg/l |
| 19 Mar 2024, 10:41 | 0.1 | 0.1 mg/l |
| 22 Feb 2024, 08:41 | 0.063 | 0.063 mg/l |
| 16 Jan 2024, 11:07 | 0.18 | 0.18 mg/l |
| 8 Dec 2023, 11:07 | 0.067 | 0.067 mg/l |
| 23 Nov 2023, 10:32 | 0.17 | 0.17 mg/l |
| 9 Nov 2023, 09:15 | 0.088 | 0.088 mg/l |
| 26 Oct 2023, 11:48 | 0.18 | 0.18 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
848 µS/cm
Sampled 27 Mar 2026, 6 months ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 27 Mar 2026, 09:50 | 848 | 848 µS/cm |
| 2 Feb 2026, 12:06 | 576 | 576 µS/cm |
| 6 Jan 2026, 12:58 | 915 | 915 µS/cm |
| 10 Dec 2025, 12:39 | 577 | 577 µS/cm |
| 20 Nov 2025, 13:09 | 1214 | 1214 µS/cm |
| 1 Oct 2025, 12:28 | 1047 | 1047 µS/cm |
| 8 Sep 2025, 10:26 | 1061 | 1061 µS/cm |
| 22 Aug 2025, 10:31 | 1022 | 1022 µS/cm |
| 29 Jul 2025, 10:32 | 985 | 985 µS/cm |
| 24 Jun 2025, 12:38 | 994 | 994 µS/cm |
| 6 May 2025, 11:22 | 1321 | 1321 µS/cm |
| 11 Apr 2025, 13:10 | 968 | 968 µS/cm |
| 13 Mar 2025, 10:24 | 925 | 925 µS/cm |
| 7 Feb 2025, 11:56 | 850 | 850 µS/cm |
| 21 Jan 2025, 12:39 | 843 | 843 µS/cm |
| 2 Dec 2024, 12:58 | 563 | 563 µS/cm |
| 18 Nov 2024, 12:58 | 994 | 994 µS/cm |
| 16 Oct 2024, 12:23 | 643 | 643 µS/cm |
| 19 Sep 2024, 09:55 | 1232 | 1232 µS/cm |
| 22 Aug 2024, 11:47 | 1460 | 1460 µS/cm |
| 17 Jul 2024, 11:53 | 670 | 670 µS/cm |
| 24 Jun 2024, 11:21 | 1038 | 1038 µS/cm |
| 24 May 2024, 12:50 | 552 | 552 µS/cm |
| 18 Apr 2024, 10:45 | 902 | 902 µS/cm |
| 19 Mar 2024, 10:41 | 692 | 692 µS/cm |
| 22 Feb 2024, 08:41 | 478 | 478 µS/cm |
| 16 Jan 2024, 11:07 | 799 | 799 µS/cm |
| 8 Dec 2023, 11:07 | 539 | 539 µS/cm |
| 23 Nov 2023, 10:32 | 693 | 693 µS/cm |
| 9 Nov 2023, 09:15 | 578 | 578 µS/cm |
| 26 Oct 2023, 11:48 | 582 | 582 µS/cm |
Everything measured here
61 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 61 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 31 | Oct 2023 – Mar 2026 | 87.9% 27 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 31 | Oct 2023 – Mar 2026 | 10.5 mg/l 27 Mar 2026 |
| Temperature of Water 0076 | River water | 31 | Oct 2023 – Mar 2026 | 7.4 °C 27 Mar 2026 |
| pH 0061 | River water | 31 | Oct 2023 – Mar 2026 | 8.33 27 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 31 | Oct 2023 – Mar 2026 | 0.042 mg/l 27 Mar 2026 |
| Nitrate as N 0117 | River water | 31 | Oct 2023 – Mar 2026 | 3.49 mg/l 27 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 31 | Oct 2023 – Mar 2026 | 0.31 mg/l 27 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 31 | Oct 2023 – Mar 2026 | 848 µS/cm 27 Mar 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 4 | Apr 2024 – Mar 2025 | below 0.004 µg/l 13 Mar 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 4 | Apr 2024 – Mar 2025 | below 0.005 µg/l 13 Mar 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 30 | Oct 2023 – Mar 2026 | 240 mg/l 27 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 31 | Oct 2023 – Mar 2026 | 0.00063 mg/l 27 Mar 2026 |
| BOD : 5 Day ATU 0085 | River water | 31 | Oct 2023 – Mar 2026 | 1.3 mg/l 27 Mar 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 2025 |
| Nitrite as N 0118 | River water | 31 | Oct 2023 – Mar 2026 | 0.015 mg/l 27 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 31 | Oct 2023 – Mar 2026 | 3.5 mg/l 27 Mar 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 4 | Apr 2024 – Mar 2025 | 0.0022 µg/l 13 Mar 2025 |
| Perfluorobutanoic acid 2995 | River water | 3 | Apr 2024 – Mar 2025 | 0.004 µg/l 13 Mar 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 3 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 2025 |
| Perfluorodecanoic acid 8892 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 4 | Apr 2024 – Mar 2025 | below 0.005 µg/l 13 Mar 2025 |
| Perfluorododecanoic acid 8894 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluoroheptanoic acid 8889 | River water | 3 | Apr 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 3 | Apr 2024 – Mar 2025 | 0.00086 µg/l 13 Mar 2025 |
| Perfluorohexanoic acid 8888 | River water | 4 | Apr 2024 – Mar 2025 | 0.0018 µg/l 13 Mar 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluorononanoic acid 8891 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 4 | Apr 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 4 | Apr 2024 – Mar 2025 | 0.00071 µg/l 13 Mar 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 3 | Apr 2024 – Mar 2025 | 0.00084 µg/l 13 Mar 2025 |
| Perfluorooctanoic acid 8890 | River water | 3 | Apr 2024 – Mar 2025 | 0.00076 µg/l 13 Mar 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 4 | Apr 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluoropentanoic acid 8887 | River water | 3 | Apr 2024 – Mar 2025 | 0.0031 µg/l 13 Mar 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 4 | Apr 2024 – Mar 2025 | below 0.006 µg/l 13 Mar 2025 |
| Perfluorotridecanoic acid 2955 | River water | 4 | Apr 2024 – Mar 2025 | below 0.005 µg/l 13 Mar 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 4 | Apr 2024 – Mar 2025 | below 0.004 µg/l 13 Mar 2025 |
| Perfluoroundecanoic acid 8893 | River water | 4 | Apr 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 2025 |
| Phosphorus, Total as P 0348 | River water | 9 | Apr 2025 – Mar 2026 | 0.34 mg/l 27 Mar 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.