Mole just above Dorking sewage treatment works
EA name: MOLE JUST ABOVE DORKING STW
Environment Agency sampling point TH-PMLR0038 · 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
- 19 Aug 2026, 13:0443 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 30 since 1 Nov 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 518352, 150282As published, to the nearest 1 m. Open in a map
- River, by its own name
- Mole
- River, by the map
- River MolePlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- Dorking On the River Mole · 0.4 km along the river
- Nearest gauge upstream
- Kinnersley Manor On the River Mole · 16 km along the riverSalfords Bridge On the Salfords Stream · 19 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (17 samples)
Monitoring (national agency policy) (12 samples)
Planned investigation (local monitoring) (1 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
81.7%
Sampled 19 Aug 2026, 43 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Aug 2026, 13:04 | 81.7 | 81.7% |
| 20 Jul 2026, 12:12 | 82.4 | 82.4% |
| 22 Jun 2026, 10:10 | 78.8 | 78.8% |
| 15 May 2026, 14:18 | 91.1 | 91.1% |
| 1 Apr 2026, 12:34 | 97.2 | 97.2% |
| 9 Mar 2026, 11:52 | 93.1 | 93.1% |
| 12 Feb 2026, 10:22 | 93.2 | 93.2% |
| 8 Jan 2026, 12:58 | 92.8 | 92.8% |
| 3 Dec 2025, 14:08 | 90 | 90% |
| 4 Nov 2025, 10:08 | 89.3 | 89.3% |
| 14 Oct 2025, 13:02 | 80.6 | 80.6% |
| 22 Sep 2025, 11:07 | 75.4 | 75.4% |
| 13 Aug 2025, 09:43 | 74.8 | 74.8% |
| 16 Jul 2025, 10:46 | 75.8 | 75.8% |
| 12 Jun 2025, 10:51 | 82.2 | 82.2% |
| 21 May 2025, 12:25 | 80.1 | 80.1% |
| 16 Apr 2025, 13:32 | 100 | 100% |
| 31 Mar 2025, 11:54 | 98.4 | 98.4% |
| 13 Feb 2025, 13:40 | 96.5 | 96.5% |
| 22 Jan 2025, 09:11 | 93.1 | 93.1% |
| 10 Dec 2024, 12:05 | 93.5 | 93.5% |
| 18 Nov 2024, 13:14 | 90.5 | 90.5% |
| 16 Oct 2024, 13:14 | 87.6 | 87.6% |
| 24 Sep 2024, 12:09 | 64.1 | 64.1% |
| 22 Aug 2024, 13:43 | 82.9 | 82.9% |
| 15 Jul 2024, 14:55 | 89.4 | 89.4% |
| 19 Jun 2024, 12:19 | 88.6 | 88.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.35 mg/l
Sampled 19 Aug 2026, 43 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Aug 2026, 13:04 | 7.35 | 7.35 mg/l |
| 20 Jul 2026, 12:12 | 7.56 | 7.56 mg/l |
| 22 Jun 2026, 10:10 | 7.01 | 7.01 mg/l |
| 15 May 2026, 14:18 | 9.64 | 9.64 mg/l |
| 1 Apr 2026, 12:34 | 10.8 | 10.8 mg/l |
| 9 Mar 2026, 11:52 | 10.5 | 10.5 mg/l |
| 12 Feb 2026, 10:22 | 10.8 | 10.8 mg/l |
| 8 Jan 2026, 12:58 | 12.1 | 12.1 mg/l |
| 3 Dec 2025, 14:08 | 10.4 | 10.4 mg/l |
| 4 Nov 2025, 10:08 | 9.54 | 9.54 mg/l |
| 14 Oct 2025, 13:02 | 8.29 | 8.29 mg/l |
| 22 Sep 2025, 11:07 | 7.6 | 7.6 mg/l |
| 13 Aug 2025, 09:43 | 6.85 | 6.85 mg/l |
| 16 Jul 2025, 10:46 | 6.94 | 6.94 mg/l |
| 12 Jun 2025, 10:51 | 7.94 | 7.94 mg/l |
| 21 May 2025, 12:25 | 7.94 | 7.94 mg/l |
| 16 Apr 2025, 13:32 | 10.6 | 10.6 mg/l |
| 31 Mar 2025, 11:54 | 10.7 | 10.7 mg/l |
| 13 Feb 2025, 13:40 | 12 | 12 mg/l |
| 22 Jan 2025, 09:11 | 11.5 | 11.5 mg/l |
| 10 Dec 2024, 12:05 | 11.1 | 11.1 mg/l |
| 18 Nov 2024, 13:14 | 10.2 | 10.2 mg/l |
| 16 Oct 2024, 13:14 | 9.07 | 9.07 mg/l |
| 24 Sep 2024, 12:09 | 6.32 | 6.32 mg/l |
| 22 Aug 2024, 13:43 | 7.89 | 7.89 mg/l |
| 15 Jul 2024, 14:55 | 8.56 | 8.56 mg/l |
| 19 Jun 2024, 12:19 | 8.61 | 8.61 mg/l |
Water temperature
code 0076 · °C
20.4 °C
Sampled 19 Aug 2026, 43 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Aug 2026, 13:04 | 20.4 | 20.4 °C |
| 20 Jul 2026, 12:12 | 19.4 | 19.4 °C |
| 22 Jun 2026, 10:10 | 21 | 21 °C |
| 15 May 2026, 14:18 | 12.7 | 12.7 °C |
| 1 Apr 2026, 12:34 | 10.5 | 10.5 °C |
| 9 Mar 2026, 11:52 | 9.9 | 9.9 °C |
| 12 Feb 2026, 10:22 | 9 | 9 °C |
| 8 Jan 2026, 12:58 | 4.1 | 4.1 °C |
| 3 Dec 2025, 14:08 | 9 | 9 °C |
| 4 Nov 2025, 10:08 | 12.3 | 12.3 °C |
| 14 Oct 2025, 13:02 | 14 | 14 °C |
| 22 Sep 2025, 11:07 | 14.9 | 14.9 °C |
| 13 Aug 2025, 09:43 | 19.5 | 19.5 °C |
| 16 Jul 2025, 10:46 | 19.5 | 19.5 °C |
| 12 Jun 2025, 10:51 | 16.9 | 16.9 °C |
| 21 May 2025, 12:25 | 15.7 | 15.7 °C |
| 16 Apr 2025, 13:32 | 12.8 | 12.8 °C |
| 31 Mar 2025, 11:54 | 11.5 | 11.5 °C |
| 13 Feb 2025, 13:40 | 5.9 | 5.9 °C |
| 22 Jan 2025, 09:11 | 6.1 | 6.1 °C |
| 10 Dec 2024, 12:05 | 8 | 8 °C |
| 18 Nov 2024, 13:14 | 9.9 | 9.9 °C |
| 16 Oct 2024, 13:14 | 13.7 | 13.7 °C |
| 24 Sep 2024, 12:09 | 15.9 | 15.9 °C |
| 22 Aug 2024, 13:43 | 17.6 | 17.6 °C |
| 15 Jul 2024, 14:55 | 17.3 | 17.3 °C |
| 19 Jun 2024, 12:19 | 16.6 | 16.6 °C |
pH
code 0061
7.7
Sampled 19 Aug 2026, 43 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Aug 2026, 13:04 | 7.7 | 7.7 |
| 20 Jul 2026, 12:12 | 7.68 | 7.68 |
| 22 Jun 2026, 10:10 | 7.49 | 7.49 |
| 15 May 2026, 14:18 | 7.63 | 7.63 |
| 1 Apr 2026, 12:34 | 7.71 | 7.71 |
| 9 Mar 2026, 11:52 | 7.57 | 7.57 |
| 12 Feb 2026, 10:22 | 7.45 | 7.45 |
| 8 Jan 2026, 12:58 | 7.63 | 7.63 |
| 3 Dec 2025, 14:08 | 7.49 | 7.49 |
| 4 Nov 2025, 10:08 | 7.44 | 7.44 |
| 14 Oct 2025, 13:02 | 7.7 | 7.7 |
| 22 Sep 2025, 11:07 | 7.74 | 7.74 |
| 13 Aug 2025, 09:43 | 7.5 | 7.5 |
| 16 Jul 2025, 10:46 | 7.52 | 7.52 |
| 12 Jun 2025, 10:51 | 7.6 | 7.6 |
| 21 May 2025, 12:25 | 7.56 | 7.56 |
| 16 Apr 2025, 13:32 | 7.69 | 7.69 |
| 31 Mar 2025, 11:54 | 8.14 | 8.14 |
| 13 Feb 2025, 13:40 | 7.7 | 7.7 |
| 22 Jan 2025, 09:11 | 7.67 | 7.67 |
| 10 Dec 2024, 12:05 | 7.5 | 7.5 |
| 18 Nov 2024, 13:14 | 7.61 | 7.61 |
| 16 Oct 2024, 13:14 | 7.34 | 7.34 |
| 24 Sep 2024, 12:09 | 7.17 | 7.17 |
| 22 Aug 2024, 13:43 | 7.49 | 7.49 |
| 15 Jul 2024, 14:55 | 7.56 | 7.56 |
| 19 Jun 2024, 12:19 | 7.59 | 7.59 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 19 Aug 2026, 43 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Aug 2026, 13:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jul 2026, 12:12 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jun 2026, 10:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 May 2026, 14:18 | 0.078 | 0.078 mg/l |
| 1 Apr 2026, 12:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Mar 2026, 11:52 | 0.048 | 0.048 mg/l |
| 12 Feb 2026, 10:22 | 0.11 | 0.11 mg/l |
| 8 Jan 2026, 12:58 | 0.33 | 0.33 mg/l |
| 3 Dec 2025, 14:08 | 0.18 | 0.18 mg/l |
| 4 Nov 2025, 10:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Oct 2025, 13:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Sep 2025, 11:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Aug 2025, 09:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jul 2025, 10:46 | 0.11 | 0.11 mg/l |
| 12 Jun 2025, 10:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 May 2025, 12:25 | 0.052 | 0.052 mg/l |
| 16 Apr 2025, 13:32 | 0.077 | 0.077 mg/l |
| 31 Mar 2025, 11:54 | 0.072 | 0.072 mg/l |
| 13 Feb 2025, 13:40 | 0.072 | 0.072 mg/l |
| 22 Jan 2025, 09:11 | 0.065 | 0.065 mg/l |
| 10 Dec 2024, 12:05 | 0.077 | 0.077 mg/l |
| 18 Nov 2024, 13:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Oct 2024, 13:14 | 0.062 | 0.062 mg/l |
| 24 Sep 2024, 12:09 | 0.25 | 0.25 mg/l |
| 22 Aug 2024, 13:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jul 2024, 14:55 | 0.057 | 0.057 mg/l |
| 19 Jun 2024, 12:19 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
18 mg/l
Sampled 19 Aug 2026, 43 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Aug 2026, 13:04 | 18 | 18 mg/l |
| 20 Jul 2026, 12:12 | 19 | 19 mg/l |
| 22 Jun 2026, 10:10 | 20 | 20 mg/l |
| 15 May 2026, 14:18 | 19.9 | 19.9 mg/l |
| 1 Apr 2026, 12:34 | 15.9 | 15.9 mg/l |
| 9 Mar 2026, 11:52 | 7.84 | 7.84 mg/l |
| 12 Feb 2026, 10:22 | 3.76 | 3.76 mg/l |
| 8 Jan 2026, 12:58 | 7.03 | 7.03 mg/l |
| 3 Dec 2025, 14:08 | 5.77 | 5.77 mg/l |
| 4 Nov 2025, 10:08 | 7.56 | 7.56 mg/l |
| 14 Oct 2025, 13:02 | 24 | 24 mg/l |
| 22 Sep 2025, 11:07 | 15 | 15 mg/l |
| 13 Aug 2025, 09:43 | 24 | 24 mg/l |
| 16 Jul 2025, 10:46 | 22 | 22 mg/l |
| 12 Jun 2025, 10:51 | 14 | 14 mg/l |
| 21 May 2025, 12:25 | 20.9 | 20.9 mg/l |
| 16 Apr 2025, 13:32 | 16.9 | 16.9 mg/l |
| 31 Mar 2025, 11:54 | 15 | 15 mg/l |
| 13 Feb 2025, 13:40 | 6.66 | 6.66 mg/l |
| 22 Jan 2025, 09:11 | 9.16 | 9.16 mg/l |
| 10 Dec 2024, 12:05 | 4.17 | 4.17 mg/l |
| 18 Nov 2024, 13:14 | 19 | 19 mg/l |
| 16 Oct 2024, 13:14 | 4.27 | 4.27 mg/l |
| 24 Sep 2024, 12:09 | 3.85 | 3.85 mg/l |
| 22 Aug 2024, 13:43 | 23 | 23 mg/l |
| 15 Jul 2024, 14:55 | 16.9 | 16.9 mg/l |
| 19 Jun 2024, 12:19 | 13.9 | 13.9 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.44 mg/l
Sampled 19 Aug 2026, 43 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Aug 2026, 13:04 | 0.44 | 0.44 mg/l |
| 20 Jul 2026, 12:12 | 0.34 | 0.34 mg/l |
| 22 Jun 2026, 10:10 | 0.37 | 0.37 mg/l |
| 15 May 2026, 14:18 | 0.35 | 0.35 mg/l |
| 1 Apr 2026, 12:34 | 0.25 | 0.25 mg/l |
| 9 Mar 2026, 11:52 | 0.18 | 0.18 mg/l |
| 12 Feb 2026, 10:22 | 0.14 | 0.14 mg/l |
| 8 Jan 2026, 12:58 | 0.21 | 0.21 mg/l |
| 3 Dec 2025, 14:08 | 0.17 | 0.17 mg/l |
| 4 Nov 2025, 10:08 | 0.15 | 0.15 mg/l |
| 14 Oct 2025, 13:02 | 0.26 | 0.26 mg/l |
| 22 Sep 2025, 11:07 | 0.49 | 0.49 mg/l |
| 13 Aug 2025, 09:43 | 0.36 | 0.36 mg/l |
| 16 Jul 2025, 10:46 | 0.28 | 0.28 mg/l |
| 12 Jun 2025, 10:51 | 0.23 | 0.23 mg/l |
| 21 May 2025, 12:25 | 0.4 | 0.4 mg/l |
| 16 Apr 2025, 13:32 | 0.2 | 0.2 mg/l |
| 31 Mar 2025, 11:54 | 0.18 | 0.18 mg/l |
| 13 Feb 2025, 13:40 | 0.12 | 0.12 mg/l |
| 22 Jan 2025, 09:11 | 0.14 | 0.14 mg/l |
| 10 Dec 2024, 12:05 | 0.12 | 0.12 mg/l |
| 18 Nov 2024, 13:14 | 0.2 | 0.2 mg/l |
| 16 Oct 2024, 13:14 | 0.17 | 0.17 mg/l |
| 24 Sep 2024, 12:09 | 0.24 | 0.24 mg/l |
| 22 Aug 2024, 13:43 | 0.4 | 0.4 mg/l |
| 15 Jul 2024, 14:55 | 1.1 | 1.1 mg/l |
| 19 Jun 2024, 12:19 | 0.79 | 0.79 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
932 µS/cm
Sampled 19 Aug 2026, 43 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 19 Aug 2026, 13:04 | 932 | 932 µS/cm |
| 20 Jul 2026, 12:12 | 921 | 921 µS/cm |
| 22 Jun 2026, 10:10 | 820 | 820 µS/cm |
| 15 May 2026, 14:18 | 821 | 821 µS/cm |
| 1 Apr 2026, 12:34 | 652 | 652 µS/cm |
| 9 Mar 2026, 11:52 | 483 | 483 µS/cm |
| 12 Feb 2026, 10:22 | 363 | 363 µS/cm |
| 8 Jan 2026, 12:58 | 763 | 763 µS/cm |
| 3 Dec 2025, 14:08 | 421 | 421 µS/cm |
| 4 Nov 2025, 10:08 | 449 | 449 µS/cm |
| 14 Oct 2025, 13:02 | 866 | 866 µS/cm |
| 22 Sep 2025, 11:07 | 732 | 732 µS/cm |
| 13 Aug 2025, 09:43 | 904 | 904 µS/cm |
| 16 Jul 2025, 10:46 | 900 | 900 µS/cm |
| 12 Jun 2025, 10:51 | 647 | 647 µS/cm |
| 21 May 2025, 12:25 | 792 | 792 µS/cm |
| 16 Apr 2025, 13:32 | 735 | 735 µS/cm |
| 31 Mar 2025, 11:54 | 726 | 726 µS/cm |
| 13 Feb 2025, 13:40 | 500 | 500 µS/cm |
| 22 Jan 2025, 09:11 | 574 | 574 µS/cm |
| 10 Dec 2024, 12:05 | 361 | 361 µS/cm |
| 18 Nov 2024, 13:14 | 731 | 731 µS/cm |
| 16 Oct 2024, 13:14 | 356 | 356 µS/cm |
| 24 Sep 2024, 12:09 | 285 | 285 µS/cm |
| 22 Aug 2024, 13:43 | 867 | 867 µS/cm |
| 15 Jul 2024, 14:55 | 705 | 705 µS/cm |
| 19 Jun 2024, 12:19 | 626 | 626 µS/cm |
Everything measured here
75 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 75 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 27 | Jun 2024 – Aug 2026 | 81.7% 19 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 27 | Jun 2024 – Aug 2026 | 7.35 mg/l 19 Aug 2026 |
| Temperature of Water 0076 | River water | 27 | Jun 2024 – Aug 2026 | 20.4 °C 19 Aug 2026 |
| pH 0061 | River water | 27 | Jun 2024 – Aug 2026 | 7.7 19 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 27 | Jun 2024 – Aug 2026 | below 0.03 mg/l 19 Aug 2026 |
| Nitrate as N 0117 | River water | 27 | Jun 2024 – Aug 2026 | 18 mg/l 19 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 27 | Jun 2024 – Aug 2026 | 0.44 mg/l 19 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 27 | Jun 2024 – Aug 2026 | 932 µS/cm 19 Aug 2026 |
| 10:2 Fluorotelomer sulfonic acid 2994 | River water | 1 | Feb 2026 – Feb 2026 | below 0.002 µg/l 12 Feb 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 6 | Nov 2023 – Feb 2026 | below 0.001 µg/l 12 Feb 2026 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 6 | Nov 2023 – Feb 2026 | below 0.001 µg/l 12 Feb 2026 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 6 | Nov 2023 – Feb 2026 | below 0.001 µg/l 12 Feb 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 6 | Nov 2023 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 6 | Nov 2023 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 6 | Nov 2023 – Feb 2026 | below 0.001 µg/l 12 Feb 2026 |
| 2H-Perfluoro-2-decenoic acid 2888 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 12 Feb 2026 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 6 | Nov 2023 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 6 | Nov 2023 – Feb 2026 | below 0.004 µg/l 12 Feb 2026 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 6 | Nov 2023 – Feb 2026 | below 0.001 µg/l 12 Feb 2026 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 6 | Nov 2023 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| 5:1:2 Fluorotelomer betaine 2887 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| 5:3 Fluorotelomer betaine 2886 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| 6:2 Fluorotelomer phosphate diester 2986 | River water | 1 | Feb 2026 – Feb 2026 | below 0.004 µg/l 12 Feb 2026 |
| 6:2 Fluorotelomer sulfonamide amine oxide (6:2 FTNO) (Capstone A) 2841 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 12 Feb 2026 |
| 6:2 Fluorotelomer sulfonamide betaine 2985 | River water | 1 | Feb 2026 – Feb 2026 | 0.012 µg/l 12 Feb 2026 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 6 | Nov 2023 – Feb 2026 | 0.0023 µg/l 12 Feb 2026 |
| 6:2/8:2 Fluorotelomer phosphate diester 2884 | River water | 1 | Feb 2026 – Feb 2026 | below 0.01 µg/l 12 Feb 2026 |
| 6:6 Perfluorophosphinic acid 2883 | River water | 1 | Feb 2026 – Feb 2026 | below 0.004 µg/l 12 Feb 2026 |
| 6:8 Perfluorophosphinic acid 2882 | River water | 1 | Feb 2026 – Feb 2026 | below 0.01 µg/l 12 Feb 2026 |
| 8:2 Fluorotelomer phosphate diester 2880 | River water | 1 | Feb 2026 – Feb 2026 | below 0.004 µg/l 12 Feb 2026 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 6 | Nov 2023 – Feb 2026 | below 0.001 µg/l 12 Feb 2026 |
| 8:8 Perfluorophosphinic acid 2879 | River water | 1 | Feb 2026 – Feb 2026 | below 0.01 µg/l 12 Feb 2026 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 6 | Nov 2023 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 27 | Jun 2024 – Aug 2026 | 140 mg/l 19 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 27 | Jun 2024 – Aug 2026 | below 0.00059 mg/l 19 Aug 2026 |
| BOD : 5 Day ATU 0085 | River water | 24 | Jun 2024 – May 2026 | 2.4 mg/l 15 May 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 6 | Nov 2023 – Feb 2026 | below 0.001 µg/l 12 Feb 2026 |
| Hexafluoropropylene oxide trimer acid 2980 | River water | 1 | Feb 2026 – Feb 2026 | below 0.001 µg/l 12 Feb 2026 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 6 | Nov 2023 – Feb 2026 | below 0.002 µg/l 12 Feb 2026 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 6 | Nov 2023 – Feb 2026 | below 0.002 µg/l 12 Feb 2026 |
| Nitrite as N 0118 | River water | 27 | Jun 2024 – Aug 2026 | 0.025 mg/l 19 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 27 | Jun 2024 – Aug 2026 | 18 mg/l 19 Aug 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 6 | Nov 2023 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 6 | Nov 2023 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 6 | Nov 2023 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 6 | Nov 2023 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 6 | Nov 2023 – Feb 2026 | 0.0005 µg/l 12 Feb 2026 |
| Perfluorobutanesulfonic acid 2972 | River water | 6 | Nov 2023 – Feb 2026 | 0.006 µg/l 12 Feb 2026 |
| Perfluorobutanoic acid 2995 | River water | 6 | Nov 2023 – Feb 2026 | 0.0057 µg/l 12 Feb 2026 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 6 | Nov 2023 – Feb 2026 | 0.00068 µg/l 12 Feb 2026 |
| Perfluorodecanesulfonic acid 2969 | River water | 6 | Nov 2023 – Feb 2026 | below 0.001 µg/l 12 Feb 2026 |
| Perfluorodecanoic acid 8892 | River water | 6 | Nov 2023 – Feb 2026 | below 0.001 µg/l 12 Feb 2026 |
| Perfluorododecane sulfonic acid 2968 | River water | 6 | Nov 2023 – Feb 2026 | below 0.005 µg/l 12 Feb 2026 |
| Perfluorododecanoic acid 8894 | River water | 6 | Nov 2023 – Feb 2026 | below 0.002 µg/l 12 Feb 2026 |
| Perfluoroheptanesulfonic acid 2967 | River water | 6 | Nov 2023 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| Perfluoroheptanoic acid 8889 | River water | 6 | Nov 2023 – Feb 2026 | 0.0035 µg/l 12 Feb 2026 |
| Perfluorohexane sulfonamido amine 2874 | River water | 1 | Feb 2026 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| Perfluorohexanesulfonamide 2965 | River water | 6 | Nov 2023 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 6 | Nov 2023 – Feb 2026 | 0.00067 µg/l 12 Feb 2026 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 6 | Nov 2023 – Feb 2026 | 0.0034 µg/l 12 Feb 2026 |
| Perfluorohexanoic acid 8888 | River water | 6 | Nov 2023 – Feb 2026 | 0.0069 µg/l 12 Feb 2026 |
| Perfluorononanesulfonic acid 2963 | River water | 6 | Nov 2023 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| Perfluorononanoic acid 8891 | River water | 6 | Nov 2023 – Feb 2026 | below 0.001 µg/l 12 Feb 2026 |
| Perfluorooctadecanoic acid 2962 | River water | 6 | Nov 2023 – Feb 2026 | below 0.002 µg/l 12 Feb 2026 |
| Perfluorooctanesulfonamide 2961 | River water | 6 | Nov 2023 – Feb 2026 | below 0.001 µg/l 12 Feb 2026 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 6 | Nov 2023 – Feb 2026 | 0.0039 µg/l 12 Feb 2026 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 6 | Nov 2023 – Feb 2026 | 0.0048 µg/l 12 Feb 2026 |
| Perfluorooctanesulfonic acid (total) 2958 | River water | 1 | Feb 2026 – Feb 2026 | 0.0087 µg/l 12 Feb 2026 |
| Perfluorooctanoic acid 8890 | River water | 6 | Nov 2023 – Feb 2026 | 0.0053 µg/l 12 Feb 2026 |
| Perfluoropentanesulfonic acid 2957 | River water | 6 | Nov 2023 – Feb 2026 | below 0.0005 µg/l 12 Feb 2026 |
| Perfluoropentanoic acid 8887 | River water | 6 | Nov 2023 – Feb 2026 | 0.0092 µg/l 12 Feb 2026 |
| Perfluorotetradecanoic acid 8895 | River water | 6 | Nov 2023 – Feb 2026 | below 0.006 µg/l 12 Feb 2026 |
| Perfluorotridecanoic acid 2955 | River water | 6 | Nov 2023 – Feb 2026 | below 0.002 µg/l 12 Feb 2026 |
| Perfluoroundecane sulfonic acid 2953 | River water | 6 | Nov 2023 – Feb 2026 | below 0.004 µg/l 12 Feb 2026 |
| Perfluoroundecanoic acid 8893 | River water | 6 | Nov 2023 – Feb 2026 | below 0.001 µg/l 12 Feb 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.