Thames at Sutton Bridge, Culham
EA name: THAMES AT SUTTON BRIDGE, CULHAM
Environment Agency sampling point TH-PTHR0105 · 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 Aug 2026, 13:5559 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 37 since 20 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 450910, 194811As published, to the nearest 1 m. Open in a map
- River, by its own name
- Thames
- River, by the map
- River ThamesPlaced on the river its name gives, 6 m from the line.
- Next gauge downstream
- Sutton Courtenay On the River Thames · 0.9 km along the riverBeside Culham Lock: too close to say above or below.
- Nearest gauge upstream
- Abingdon Lock On the River Thames · 5.0 km along the riverAbingdon On the River Ock · 5.6 km along the riverAbingdon On the River Stert · 6.1 km along the river
- Why it was sampled
- Monitoring (national agency policy) (30 samples)
Environmental monitoring statutory (EU directives) (7 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
95.8%
Sampled 20 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 13:48 | 95.8 | 95.8% |
| 27 Apr 2026, 13:23 | 113.2 | 113.2% |
| 10 Mar 2026, 13:53 | 101.9 | 101.9% |
| 16 Feb 2026, 12:47 | 86.3 | 86.3% |
| 14 Jan 2026, 14:05 | 97.2 | 97.2% |
| 13 Mar 2025, 09:32 | 99.6 | 99.6% |
| 11 Feb 2025, 10:04 | 98.4 | 98.4% |
| 28 Jan 2025, 09:05 | 96.4 | 96.4% |
| 11 Dec 2024, 14:10 | 94.4 | 94.4% |
| 20 Nov 2024, 13:17 | 96.6 | 96.6% |
| 18 Oct 2024, 14:09 | 94 | 94% |
| 18 Sep 2024, 09:25 | 99.6 | 99.6% |
| 27 Aug 2024, 11:36 | 95.2 | 95.2% |
| 17 Jul 2024, 13:54 | 98.5 | 98.5% |
| 24 Jun 2024, 11:33 | 94.8 | 94.8% |
| 14 May 2024, 13:31 | 98 | 98% |
| 18 Apr 2024, 13:39 | 102.7 | 102.7% |
| 22 Mar 2024, 15:56 | 101.1 | 101.1% |
| 21 Feb 2024, 09:10 | 88.1 | 88.1% |
| 15 Jan 2024, 11:24 | 100.7 | 100.7% |
| 5 Dec 2023, 13:35 | 96.9 | 96.9% |
| 27 Nov 2023, 09:25 | 98.5 | 98.5% |
| 13 Nov 2023, 11:47 | 93 | 93% |
| 20 Oct 2023, 14:15 | 91.5 | 91.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.78 mg/l
Sampled 20 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 13:48 | 9.78 | 9.78 mg/l |
| 27 Apr 2026, 13:23 | 11.1 | 11.1 mg/l |
| 10 Mar 2026, 13:53 | 11.5 | 11.5 mg/l |
| 16 Feb 2026, 12:47 | 10.7 | 10.7 mg/l |
| 14 Jan 2026, 14:05 | 12 | 12 mg/l |
| 13 Mar 2025, 09:32 | 11.9 | 11.9 mg/l |
| 11 Feb 2025, 10:04 | 12.5 | 12.5 mg/l |
| 28 Jan 2025, 09:05 | 12 | 12 mg/l |
| 11 Dec 2024, 14:10 | 11.6 | 11.6 mg/l |
| 20 Nov 2024, 13:17 | 11.7 | 11.7 mg/l |
| 18 Oct 2024, 14:09 | 9.75 | 9.75 mg/l |
| 18 Sep 2024, 09:25 | 10 | 10 mg/l |
| 27 Aug 2024, 11:36 | 9.1 | 9.1 mg/l |
| 17 Jul 2024, 13:54 | 9.23 | 9.23 mg/l |
| 24 Jun 2024, 11:33 | 8.79 | 8.79 mg/l |
| 14 May 2024, 13:31 | 9.51 | 9.51 mg/l |
| 18 Apr 2024, 13:39 | 11.2 | 11.2 mg/l |
| 22 Mar 2024, 15:56 | 10.9 | 10.9 mg/l |
| 21 Feb 2024, 09:10 | 10 | 10 mg/l |
| 15 Jan 2024, 11:24 | 12.6 | 12.6 mg/l |
| 5 Dec 2023, 13:35 | 11.9 | 11.9 mg/l |
| 27 Nov 2023, 09:25 | 12 | 12 mg/l |
| 13 Nov 2023, 11:47 | 10.7 | 10.7 mg/l |
| 20 Oct 2023, 14:15 | 9.6 | 9.6 mg/l |
Water temperature
code 0076 · °C
14.3 °C
Sampled 20 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 13:48 | 14.3 | 14.3 °C |
| 27 Apr 2026, 13:23 | 16.3 | 16.3 °C |
| 10 Mar 2026, 13:53 | 10.1 | 10.1 °C |
| 16 Feb 2026, 12:47 | 6 | 6 °C |
| 14 Jan 2026, 14:05 | 6.3 | 6.3 °C |
| 13 Mar 2025, 09:32 | 7.7 | 7.7 °C |
| 11 Feb 2025, 10:04 | 5.3 | 5.3 °C |
| 28 Jan 2025, 09:05 | 6.1 | 6.1 °C |
| 11 Dec 2024, 14:10 | 6.3 | 6.3 °C |
| 20 Nov 2024, 13:17 | 7.1 | 7.1 °C |
| 18 Oct 2024, 14:09 | 13.6 | 13.6 °C |
| 18 Sep 2024, 09:25 | 14.9 | 14.9 °C |
| 27 Aug 2024, 11:36 | 17.4 | 17.4 °C |
| 17 Jul 2024, 13:54 | 18.4 | 18.4 °C |
| 24 Jun 2024, 11:33 | 18.9 | 18.9 °C |
| 14 May 2024, 13:31 | 16.7 | 16.7 °C |
| 18 Apr 2024, 13:39 | 11.5 | 11.5 °C |
| 22 Mar 2024, 15:56 | 12 | 12 °C |
| 21 Feb 2024, 09:10 | 9.7 | 9.7 °C |
| 15 Jan 2024, 11:24 | 5.8 | 5.8 °C |
| 5 Dec 2023, 13:35 | 6.6 | 6.6 °C |
| 27 Nov 2023, 09:25 | 6.9 | 6.9 °C |
| 13 Nov 2023, 11:47 | 9.1 | 9.1 °C |
| 20 Oct 2023, 14:15 | 13.1 | 13.1 °C |
pH
code 0061
8.01
Sampled 3 Aug 2026, 59 days ago · 37 results banked
Every result (37)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 13:55 | 8.01 | 8.01 |
| 17 Jul 2026, 12:57 | 8.42 | 8.42 |
| 23 Jun 2026, 14:06 | 8.23 | 8.23 |
| 20 May 2026, 13:48 | 8.17 | 8.17 |
| 27 Apr 2026, 13:23 | 8.45 | 8.45 |
| 10 Mar 2026, 13:53 | 8.18 | 8.18 |
| 16 Feb 2026, 12:47 | 8.1 | 8.1 |
| 14 Jan 2026, 14:05 | 8.29 | 8.29 |
| 9 Dec 2025, 09:25 | 8.08 | 8.08 |
| 18 Nov 2025, 10:34 | 8.02 | 8.02 |
| 13 Oct 2025, 09:36 | 7.98 | 7.98 |
| 18 Sep 2025, 15:22 | 8.03 | 8.03 |
| 12 Aug 2025, 12:17 | 8.49 | 8.49 |
| 21 Jul 2025, 14:44 | 7.9 | 7.9 |
| 27 Jun 2025, 12:08 | 8.04 | 8.04 |
| 14 May 2025, 11:20 | 8.15 | 8.15 |
| 28 Apr 2025, 13:42 | 8.18 | 8.18 |
| 13 Mar 2025, 09:32 | 8.27 | 8.27 |
| 11 Feb 2025, 10:04 | 8.11 | 8.11 |
| 28 Jan 2025, 09:05 | 8.05 | 8.05 |
| 11 Dec 2024, 14:10 | 8.07 | 8.07 |
| 20 Nov 2024, 13:17 | 8.11 | 8.11 |
| 18 Oct 2024, 14:09 | 7.99 | 7.99 |
| 18 Sep 2024, 09:25 | 8.08 | 8.08 |
| 27 Aug 2024, 11:36 | 8.05 | 8.05 |
| 17 Jul 2024, 13:54 | 8.06 | 8.06 |
| 24 Jun 2024, 11:33 | 8.04 | 8.04 |
| 14 May 2024, 13:31 | 8.31 | 8.31 |
| 18 Apr 2024, 13:39 | 8.38 | 8.38 |
| 5 Apr 2024, 13:36 | 8.17 | 8.17 |
| 22 Mar 2024, 15:56 | 8.1 | 8.1 |
| 21 Feb 2024, 09:10 | 8.04 | 8.04 |
| 15 Jan 2024, 11:24 | 8.22 | 8.22 |
| 5 Dec 2023, 13:35 | 8 | 8 |
| 27 Nov 2023, 09:25 | 8.1 | 8.1 |
| 13 Nov 2023, 11:47 | 7.94 | 7.94 |
| 20 Oct 2023, 14:15 | 7.86 | 7.86 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.036 mg/l
Sampled 20 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 13:48 | 0.036 | 0.036 mg/l |
| 27 Apr 2026, 13:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Mar 2026, 13:53 | 0.032 | 0.032 mg/l |
| 16 Feb 2026, 12:47 | 0.043 | 0.043 mg/l |
| 14 Jan 2026, 14:05 | 0.079 | 0.079 mg/l |
| 13 Mar 2025, 09:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Feb 2025, 10:04 | 0.051 | 0.051 mg/l |
| 28 Jan 2025, 09:05 | 0.092 | 0.092 mg/l |
| 11 Dec 2024, 14:10 | 0.03 | 0.03 mg/l |
| 20 Nov 2024, 13:17 | 0.036 | 0.036 mg/l |
| 18 Oct 2024, 14:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Sep 2024, 09:25 | 0.046 | 0.046 mg/l |
| 27 Aug 2024, 11:36 | 0.051 | 0.051 mg/l |
| 17 Jul 2024, 13:54 | 0.049 | 0.049 mg/l |
| 24 Jun 2024, 11:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 May 2024, 13:31 | 0.036 | 0.036 mg/l |
| 18 Apr 2024, 13:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Mar 2024, 15:56 | 0.04 | 0.04 mg/l |
| 21 Feb 2024, 09:10 | 0.058 | 0.058 mg/l |
| 15 Jan 2024, 11:24 | 0.04 | 0.04 mg/l |
| 5 Dec 2023, 13:35 | 0.047 | 0.047 mg/l |
| 27 Nov 2023, 09:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Nov 2023, 11:47 | 0.088 | 0.088 mg/l |
| 20 Oct 2023, 14:15 | 0.2 | 0.2 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
7.97 mg/l
Sampled 20 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 13:48 | 7.97 | 7.97 mg/l |
| 27 Apr 2026, 13:23 | 6.48 | 6.48 mg/l |
| 10 Mar 2026, 13:53 | 6.18 | 6.18 mg/l |
| 16 Feb 2026, 12:47 | 4.29 | 4.29 mg/l |
| 14 Jan 2026, 14:05 | 6.66 | 6.66 mg/l |
| 13 Mar 2025, 09:32 | 7.07 | 7.07 mg/l |
| 11 Feb 2025, 10:04 | 5.77 | 5.77 mg/l |
| 28 Jan 2025, 09:05 | 4.83 | 4.83 mg/l |
| 11 Dec 2024, 14:10 | 4.68 | 4.68 mg/l |
| 20 Nov 2024, 13:17 | 6.28 | 6.28 mg/l |
| 18 Oct 2024, 14:09 | 3.98 | 3.98 mg/l |
| 18 Sep 2024, 09:25 | 8.08 | 8.08 mg/l |
| 27 Aug 2024, 11:36 | 6.48 | 6.48 mg/l |
| 17 Jul 2024, 13:54 | 5.87 | 5.87 mg/l |
| 24 Jun 2024, 11:33 | 6.07 | 6.07 mg/l |
| 14 May 2024, 13:31 | 6.48 | 6.48 mg/l |
| 18 Apr 2024, 13:39 | 6.58 | 6.58 mg/l |
| 22 Mar 2024, 15:56 | 5.48 | 5.48 mg/l |
| 21 Feb 2024, 09:10 | 3.48 | 3.48 mg/l |
| 15 Jan 2024, 11:24 | 6.28 | 6.28 mg/l |
| 5 Dec 2023, 13:35 | 6.06 | 6.06 mg/l |
| 27 Nov 2023, 09:25 | 5.98 | 5.98 mg/l |
| 13 Nov 2023, 11:47 | 4.18 | 4.18 mg/l |
| 20 Oct 2023, 14:15 | 5.17 | 5.17 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.18 mg/l
Sampled 20 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 13:48 | 0.18 | 0.18 mg/l |
| 27 Apr 2026, 13:23 | 0.079 | 0.079 mg/l |
| 10 Mar 2026, 13:53 | 0.075 | 0.075 mg/l |
| 16 Feb 2026, 12:47 | 0.042 | 0.042 mg/l |
| 14 Jan 2026, 14:05 | 0.1 | 0.1 mg/l |
| 13 Mar 2025, 09:32 | 0.079 | 0.079 mg/l |
| 11 Feb 2025, 10:04 | 0.092 | 0.092 mg/l |
| 28 Jan 2025, 09:05 | 0.088 | 0.088 mg/l |
| 11 Dec 2024, 14:10 | 0.07 | 0.07 mg/l |
| 20 Nov 2024, 13:17 | 0.13 | 0.13 mg/l |
| 18 Oct 2024, 14:09 | 0.071 | 0.071 mg/l |
| 18 Sep 2024, 09:25 | 0.22 | 0.22 mg/l |
| 27 Aug 2024, 11:36 | 0.18 | 0.18 mg/l |
| 17 Jul 2024, 13:54 | 0.19 | 0.19 mg/l |
| 24 Jun 2024, 11:33 | 0.14 | 0.14 mg/l |
| 14 May 2024, 13:31 | 0.12 | 0.12 mg/l |
| 18 Apr 2024, 13:39 | 0.069 | 0.069 mg/l |
| 22 Mar 2024, 15:56 | 0.062 | 0.062 mg/l |
| 21 Feb 2024, 09:10 | 0.055 | 0.055 mg/l |
| 15 Jan 2024, 11:24 | 0.07 | 0.07 mg/l |
| 5 Dec 2023, 13:35 | 0.12 | 0.12 mg/l |
| 27 Nov 2023, 09:25 | 0.083 | 0.083 mg/l |
| 13 Nov 2023, 11:47 | 0.092 | 0.092 mg/l |
| 20 Oct 2023, 14:15 | 0.18 | 0.18 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
666 µS/cm
Sampled 20 May 2026, 4 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 May 2026, 13:48 | 666 | 666 µS/cm |
| 27 Apr 2026, 13:23 | 617 | 617 µS/cm |
| 10 Mar 2026, 13:53 | 603 | 603 µS/cm |
| 16 Feb 2026, 12:47 | 513 | 513 µS/cm |
| 14 Jan 2026, 14:05 | 607 | 607 µS/cm |
| 13 Mar 2025, 09:32 | 641 | 641 µS/cm |
| 11 Feb 2025, 10:04 | 604 | 604 µS/cm |
| 28 Jan 2025, 09:05 | 539 | 539 µS/cm |
| 11 Dec 2024, 14:10 | 553 | 553 µS/cm |
| 20 Nov 2024, 13:17 | 628 | 628 µS/cm |
| 18 Oct 2024, 14:09 | 573 | 573 µS/cm |
| 18 Sep 2024, 09:25 | 680 | 680 µS/cm |
| 27 Aug 2024, 11:36 | 628 | 628 µS/cm |
| 17 Jul 2024, 13:54 | 609 | 609 µS/cm |
| 24 Jun 2024, 11:33 | 643 | 643 µS/cm |
| 14 May 2024, 13:31 | 637 | 637 µS/cm |
| 18 Apr 2024, 13:39 | 611 | 611 µS/cm |
| 22 Mar 2024, 15:56 | 595 | 595 µS/cm |
| 21 Feb 2024, 09:10 | 478 | 478 µS/cm |
| 15 Jan 2024, 11:24 | 652 | 652 µS/cm |
| 5 Dec 2023, 13:35 | 642 | 642 µS/cm |
| 27 Nov 2023, 09:25 | 643 | 643 µS/cm |
| 13 Nov 2023, 11:47 | 552 | 552 µS/cm |
| 20 Oct 2023, 14:15 | 600 | 600 µS/cm |
Everything measured here
77 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 77 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 24 | Oct 2023 – May 2026 | 95.8% 20 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Oct 2023 – May 2026 | 9.78 mg/l 20 May 2026 |
| Temperature of Water 0076 | River water | 24 | Oct 2023 – May 2026 | 14.3 °C 20 May 2026 |
| pH 0061 | River water | 37 | Oct 2023 – Aug 2026 | 8.01 3 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Oct 2023 – May 2026 | 0.036 mg/l 20 May 2026 |
| Nitrate as N 0117 | River water | 24 | Oct 2023 – May 2026 | 7.97 mg/l 20 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Oct 2023 – May 2026 | 0.18 mg/l 20 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Oct 2023 – May 2026 | 666 µS/cm 20 May 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 27 Aug 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 27 Aug 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 27 Aug 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 27 Aug 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 27 Aug 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 27 Aug 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 27 Aug 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Jun 2024 – Aug 2024 | below 0.004 µg/l 27 Aug 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Jun 2024 – Aug 2024 | below 0.005 µg/l 27 Aug 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 27 Aug 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Jun 2024 – Aug 2024 | 0.024 µg/l 27 Aug 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 27 Aug 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 27 Aug 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Oct 2023 – May 2026 | 210 mg/l 20 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Oct 2023 – May 2026 | 0.0009 mg/l 20 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 18 | Feb 2024 – May 2026 | 1.8 mg/l 20 May 2026 |
| Cadmium, Dissolved 0106 | River water | 7 | Oct 2023 – Mar 2024 | below 0.01 µg/l 22 Mar 2024 |
| Calcium 0241 | River water | 13 | Oct 2023 – Jul 2026 | 100 mg/l 17 Jul 2026 |
| Calcium, Dissolved 0239 | River water | 36 | Oct 2023 – Aug 2026 | 100 mg/l 3 Aug 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 36 | Oct 2023 – Aug 2026 | 4.2 mg/l 3 Aug 2026 |
| Chloroform :- {Trichloromethane} 3373 | River water | 7 | Oct 2023 – Mar 2024 | below 0.1 µg/l 22 Mar 2024 |
| Chromium Hexavalent, Dissolved :- {Cr VI} 6619 | River water | 12 | Oct 2023 – Jul 2026 | 0.057 µg/l 17 Jul 2026 |
| Chromium, Dissolved 3409 | River water | 13 | Oct 2023 – Jul 2026 | below 0.5 µg/l 17 Jul 2026 |
| Copper : BLM Bioavailable 4821 | River water | 13 | Oct 2023 – Jul 2026 | 0.21 µg/l 17 Jul 2026 |
| Copper, Dissolved 6450 | River water | 13 | Oct 2023 – Jul 2026 | 1.5 µg/l 17 Jul 2026 |
| Hardness, Total as CaCO3 0158 | River water | 13 | Oct 2023 – Jul 2026 | 273 mg/l 17 Jul 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 27 Aug 2024 |
| Iron, Dissolved 6460 | River water | 13 | Oct 2023 – Jul 2026 | below 30 µg/l 17 Jul 2026 |
| Lead : BLM Bioavailable 3377 | River water | 36 | Oct 2023 – Aug 2026 | 0.01 µg/l 3 Aug 2026 |
| Lead, Dissolved 0052 | River water | 36 | Oct 2023 – Aug 2026 | below 0.1 µg/l 3 Aug 2026 |
| Magnesium 0237 | River water | 13 | Oct 2023 – Jul 2026 | 5.6 mg/l 17 Jul 2026 |
| Magnesium, Dissolved 0235 | River water | 17 | Oct 2023 – Jul 2026 | 5.6 mg/l 17 Jul 2026 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 27 Aug 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 27 Aug 2024 |
| Nitrite as N 0118 | River water | 24 | Oct 2023 – May 2026 | 0.031 mg/l 20 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Oct 2023 – May 2026 | 8 mg/l 20 May 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 27 Aug 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 27 Aug 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 27 Aug 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 27 Aug 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 27 Aug 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Jun 2024 – Aug 2024 | 0.0044 µg/l 27 Aug 2024 |
| Perfluorobutanoic acid 2995 | River water | 2 | Jun 2024 – Aug 2024 | 0.0036 µg/l 27 Aug 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Jun 2024 – Aug 2024 | 0.0015 µg/l 27 Aug 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 27 Aug 2024 |
| Perfluorodecanoic acid 8892 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 27 Aug 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Jun 2024 – Aug 2024 | below 0.005 µg/l 27 Aug 2024 |
| Perfluorododecanoic acid 8894 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 27 Aug 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 27 Aug 2024 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Jun 2024 – Aug 2024 | 0.0021 µg/l 27 Aug 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 27 Aug 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Jun 2024 – Aug 2024 | 0.00076 µg/l 27 Aug 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Jun 2024 – Aug 2024 | 0.0032 µg/l 27 Aug 2024 |
| Perfluorohexanoic acid 8888 | River water | 2 | Jun 2024 – Aug 2024 | 0.005 µg/l 27 Aug 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 27 Aug 2024 |
| Perfluorononanoic acid 8891 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 27 Aug 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 27 Aug 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 27 Aug 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Jun 2024 – Aug 2024 | 0.002 µg/l 27 Aug 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Jun 2024 – Aug 2024 | 0.0037 µg/l 27 Aug 2024 |
| Perfluorooctanoic acid 8890 | River water | 2 | Jun 2024 – Aug 2024 | 0.0027 µg/l 27 Aug 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 27 Aug 2024 |
| Perfluoropentanoic acid 8887 | River water | 2 | Jun 2024 – Aug 2024 | 0.0051 µg/l 27 Aug 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Jun 2024 – Aug 2024 | below 0.006 µg/l 27 Aug 2024 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Jun 2024 – Aug 2024 | below 0.005 µg/l 27 Aug 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Jun 2024 – Aug 2024 | below 0.004 µg/l 27 Aug 2024 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 27 Aug 2024 |
| Zinc 6455 | River water | 13 | Oct 2023 – Jul 2026 | below 5 µg/l 17 Jul 2026 |
| Zinc, Dissolved 3408 | River water | 13 | Oct 2023 – Jul 2026 | 1.3 µg/l 17 Jul 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.