Mole at Royal Mills, Esher
EA name: MOLE AT ROYAL MILLS, ESHER
Environment Agency sampling point TH-PMLR0031 · 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
- 18 May 2026, 10:455 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 2 Oct 2026 and had nothing newer.
- Samples banked
- 24 since 27 Jun 2024 Imported periods: 1 Oct 2023 – 2 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 512980, 165730As published, to the nearest 10 m. Open in a map
- River, by its own name
- Mole
- River, by the map
- River MolePlaced on the river its name gives, 12 m from the line.
- Next gauge downstream
- Esher On the River Mole · 0.3 km along the river
- Nearest gauge upstream
- Downside Bridge On the River Mole · 15 km along the river
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96.1%
Sampled 18 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 10:45 | 96.1 | 96.1% |
| 29 Apr 2026, 11:22 | 98.8 | 98.8% |
| 4 Mar 2026, 10:54 | 95.1 | 95.1% |
| 10 Feb 2026, 12:20 | 91.5 | 91.5% |
| 20 Jan 2026, 13:48 | 92.3 | 92.3% |
| 2 Dec 2025, 12:07 | 90.7 | 90.7% |
| 4 Nov 2025, 12:02 | 87.7 | 87.7% |
| 21 Oct 2025, 12:02 | 79.1 | 79.1% |
| 19 Sep 2025, 13:41 | 98.3 | 98.3% |
| 21 Aug 2025, 10:46 | 96.5 | 96.5% |
| 9 Jul 2025, 09:29 | 80.1 | 80.1% |
| 9 Jun 2025, 13:23 | 92.7 | 92.7% |
| 14 May 2025, 12:25 | 90.9 | 90.9% |
| 30 Apr 2025, 13:52 | 110.7 | 110.7% |
| 13 Mar 2025, 13:00 | 97.6 | 97.6% |
| 10 Feb 2025, 12:09 | 95.1 | 95.1% |
| 22 Jan 2025, 10:48 | 91.9 | 91.9% |
| 3 Dec 2024, 13:08 | 90.5 | 90.5% |
| 19 Nov 2024, 12:28 | 88.4 | 88.4% |
| 21 Oct 2024, 12:18 | 89.5 | 89.5% |
| 16 Sep 2024, 13:16 | 100 | 100% |
| 19 Aug 2024, 10:47 | 94.9 | 94.9% |
| 15 Jul 2024, 12:43 | 94.2 | 94.2% |
| 27 Jun 2024, 12:32 | 127.1 | 127.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.1 mg/l
Sampled 18 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 10:45 | 10.1 | 10.1 mg/l |
| 29 Apr 2026, 11:22 | 10.1 | 10.1 mg/l |
| 4 Mar 2026, 10:54 | 10.8 | 10.8 mg/l |
| 10 Feb 2026, 12:20 | 10.5 | 10.5 mg/l |
| 20 Jan 2026, 13:48 | 10.8 | 10.8 mg/l |
| 2 Dec 2025, 12:07 | 10.4 | 10.4 mg/l |
| 4 Nov 2025, 12:02 | 9.3 | 9.3 mg/l |
| 21 Oct 2025, 12:02 | 8.28 | 8.28 mg/l |
| 19 Sep 2025, 13:41 | 9.46 | 9.46 mg/l |
| 21 Aug 2025, 10:46 | 9.26 | 9.26 mg/l |
| 9 Jul 2025, 09:29 | 7.5 | 7.5 mg/l |
| 9 Jun 2025, 13:23 | 9.15 | 9.15 mg/l |
| 14 May 2025, 12:25 | 8.44 | 8.44 mg/l |
| 30 Apr 2025, 13:52 | 10.3 | 10.3 mg/l |
| 13 Mar 2025, 13:00 | 11.5 | 11.5 mg/l |
| 10 Feb 2025, 12:09 | 11.8 | 11.8 mg/l |
| 22 Jan 2025, 10:48 | 11.5 | 11.5 mg/l |
| 3 Dec 2024, 13:08 | 10.3 | 10.3 mg/l |
| 19 Nov 2024, 12:28 | 10.2 | 10.2 mg/l |
| 21 Oct 2024, 12:18 | 9.3 | 9.3 mg/l |
| 16 Sep 2024, 13:16 | 9.72 | 9.72 mg/l |
| 19 Aug 2024, 10:47 | 8.89 | 8.89 mg/l |
| 15 Jul 2024, 12:43 | 9.16 | 9.16 mg/l |
| 27 Jun 2024, 12:32 | 11.4 | 11.4 mg/l |
Water temperature
code 0076 · °C
12.9 °C
Sampled 18 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 10:45 | 12.9 | 12.9 °C |
| 29 Apr 2026, 11:22 | 14.3 | 14.3 °C |
| 4 Mar 2026, 10:54 | 9.8 | 9.8 °C |
| 10 Feb 2026, 12:20 | 9.1 | 9.1 °C |
| 20 Jan 2026, 13:48 | 8.6 | 8.6 °C |
| 2 Dec 2025, 12:07 | 9.2 | 9.2 °C |
| 4 Nov 2025, 12:02 | 12.6 | 12.6 °C |
| 21 Oct 2025, 12:02 | 13.2 | 13.2 °C |
| 19 Sep 2025, 13:41 | 17.1 | 17.1 °C |
| 21 Aug 2025, 10:46 | 17.2 | 17.2 °C |
| 9 Jul 2025, 09:29 | 18.4 | 18.4 °C |
| 9 Jun 2025, 13:23 | 15.9 | 15.9 °C |
| 14 May 2025, 12:25 | 18.8 | 18.8 °C |
| 30 Apr 2025, 13:52 | 18.6 | 18.6 °C |
| 13 Mar 2025, 13:00 | 8.3 | 8.3 °C |
| 10 Feb 2025, 12:09 | 6 | 6 °C |
| 22 Jan 2025, 10:48 | 5.9 | 5.9 °C |
| 3 Dec 2024, 13:08 | 9.5 | 9.5 °C |
| 19 Nov 2024, 12:28 | 9.1 | 9.1 °C |
| 21 Oct 2024, 12:18 | 13.5 | 13.5 °C |
| 16 Sep 2024, 13:16 | 16.6 | 16.6 °C |
| 19 Aug 2024, 10:47 | 18.4 | 18.4 °C |
| 15 Jul 2024, 12:43 | 16.6 | 16.6 °C |
| 27 Jun 2024, 12:32 | 20.7 | 20.7 °C |
pH
code 0061
7.86
Sampled 18 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 10:45 | 7.86 | 7.86 |
| 29 Apr 2026, 11:22 | 8.03 | 8.03 |
| 4 Mar 2026, 10:54 | 7.86 | 7.86 |
| 10 Feb 2026, 12:20 | 7.59 | 7.59 |
| 20 Jan 2026, 13:48 | 7.79 | 7.79 |
| 2 Dec 2025, 12:07 | 7.77 | 7.77 |
| 4 Nov 2025, 12:02 | 7.67 | 7.67 |
| 21 Oct 2025, 12:02 | 7.71 | 7.71 |
| 19 Sep 2025, 13:41 | 7.93 | 7.93 |
| 21 Aug 2025, 10:46 | 8.13 | 8.13 |
| 9 Jul 2025, 09:29 | 7.39 | 7.39 |
| 9 Jun 2025, 13:23 | 7.69 | 7.69 |
| 14 May 2025, 12:25 | 7.87 | 7.87 |
| 30 Apr 2025, 13:52 | 8.01 | 8.01 |
| 13 Mar 2025, 13:00 | 8.02 | 8.02 |
| 10 Feb 2025, 12:09 | 7.85 | 7.85 |
| 22 Jan 2025, 10:48 | 7.82 | 7.82 |
| 3 Dec 2024, 13:08 | 7.69 | 7.69 |
| 19 Nov 2024, 12:28 | 7.77 | 7.77 |
| 21 Oct 2024, 12:18 | 7.69 | 7.69 |
| 16 Sep 2024, 13:16 | 7.86 | 7.86 |
| 19 Aug 2024, 10:47 | 7.96 | 7.96 |
| 15 Jul 2024, 12:43 | 7.85 | 7.85 |
| 27 Jun 2024, 12:32 | 8.28 | 8.28 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 18 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 10:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Apr 2026, 11:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2026, 10:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Feb 2026, 12:20 | 0.17 | 0.17 mg/l |
| 20 Jan 2026, 13:48 | 0.049 | 0.049 mg/l |
| 2 Dec 2025, 12:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Nov 2025, 12:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Oct 2025, 12:02 | 0.059 | 0.059 mg/l |
| 19 Sep 2025, 13:41 | 0.032 | 0.032 mg/l |
| 21 Aug 2025, 10:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jul 2025, 09:29 | 0.041 | 0.041 mg/l |
| 9 Jun 2025, 13:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 May 2025, 12:25 | 0.061 | 0.061 mg/l |
| 30 Apr 2025, 13:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Mar 2025, 13:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Feb 2025, 12:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jan 2025, 10:48 | 0.073 | 0.073 mg/l |
| 3 Dec 2024, 13:08 | 0.058 | 0.058 mg/l |
| 19 Nov 2024, 12:28 | 0.041 | 0.041 mg/l |
| 21 Oct 2024, 12:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Sep 2024, 13:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Aug 2024, 10:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jul 2024, 12:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Jun 2024, 12:32 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
13 mg/l
Sampled 18 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 10:45 | 13 | 13 mg/l |
| 29 Apr 2026, 11:22 | 13 | 13 mg/l |
| 4 Mar 2026, 10:54 | 5.77 | 5.77 mg/l |
| 10 Feb 2026, 12:20 | 3.54 | 3.54 mg/l |
| 20 Jan 2026, 13:48 | 4.77 | 4.77 mg/l |
| 2 Dec 2025, 12:07 | 9.09 | 9.09 mg/l |
| 4 Nov 2025, 12:02 | 8.58 | 8.58 mg/l |
| 21 Oct 2025, 12:02 | 15 | 15 mg/l |
| 19 Sep 2025, 13:41 | 8.68 | 8.68 mg/l |
| 21 Aug 2025, 10:46 | 13 | 13 mg/l |
| 9 Jul 2025, 09:29 | 11 | 11 mg/l |
| 9 Jun 2025, 13:23 | 14 | 14 mg/l |
| 14 May 2025, 12:25 | 13 | 13 mg/l |
| 30 Apr 2025, 13:52 | 9.07 | 9.07 mg/l |
| 13 Mar 2025, 13:00 | 8.28 | 8.28 mg/l |
| 10 Feb 2025, 12:09 | 8.75 | 8.75 mg/l |
| 22 Jan 2025, 10:48 | 8.55 | 8.55 mg/l |
| 3 Dec 2024, 13:08 | 5.26 | 5.26 mg/l |
| 19 Nov 2024, 12:28 | 14 | 14 mg/l |
| 21 Oct 2024, 12:18 | 6.67 | 6.67 mg/l |
| 16 Sep 2024, 13:16 | 12 | 12 mg/l |
| 19 Aug 2024, 10:47 | 13 | 13 mg/l |
| 15 Jul 2024, 12:43 | 6.39 | 6.39 mg/l |
| 27 Jun 2024, 12:32 | 12 | 12 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.21 mg/l
Sampled 18 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 10:45 | 0.21 | 0.21 mg/l |
| 29 Apr 2026, 11:22 | 0.18 | 0.18 mg/l |
| 4 Mar 2026, 10:54 | 0.15 | 0.15 mg/l |
| 10 Feb 2026, 12:20 | 0.15 | 0.15 mg/l |
| 20 Jan 2026, 13:48 | 0.14 | 0.14 mg/l |
| 2 Dec 2025, 12:07 | 0.2 | 0.2 mg/l |
| 4 Nov 2025, 12:02 | 0.2 | 0.2 mg/l |
| 21 Oct 2025, 12:02 | 0.33 | 0.33 mg/l |
| 19 Sep 2025, 13:41 | 0.35 | 0.35 mg/l |
| 21 Aug 2025, 10:46 | 0.21 | 0.21 mg/l |
| 9 Jul 2025, 09:29 | 0.24 | 0.24 mg/l |
| 9 Jun 2025, 13:23 | 0.31 | 0.31 mg/l |
| 14 May 2025, 12:25 | 0.24 | 0.24 mg/l |
| 30 Apr 2025, 13:52 | 0.2 | 0.2 mg/l |
| 13 Mar 2025, 13:00 | 0.14 | 0.14 mg/l |
| 10 Feb 2025, 12:09 | 0.13 | 0.13 mg/l |
| 22 Jan 2025, 10:48 | 0.16 | 0.16 mg/l |
| 3 Dec 2024, 13:08 | 0.17 | 0.17 mg/l |
| 19 Nov 2024, 12:28 | 0.23 | 0.23 mg/l |
| 21 Oct 2024, 12:18 | 0.19 | 0.19 mg/l |
| 16 Sep 2024, 13:16 | 0.23 | 0.23 mg/l |
| 19 Aug 2024, 10:47 | 0.3 | 0.3 mg/l |
| 15 Jul 2024, 12:43 | 0.31 | 0.31 mg/l |
| 27 Jun 2024, 12:32 | 0.34 | 0.34 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
717 µS/cm
Sampled 18 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 10:45 | 717 | 717 µS/cm |
| 29 Apr 2026, 11:22 | 666 | 666 µS/cm |
| 4 Mar 2026, 10:54 | 487 | 487 µS/cm |
| 10 Feb 2026, 12:20 | 386 | 386 µS/cm |
| 20 Jan 2026, 13:48 | 449 | 449 µS/cm |
| 2 Dec 2025, 12:07 | 550 | 550 µS/cm |
| 4 Nov 2025, 12:02 | 510 | 510 µS/cm |
| 21 Oct 2025, 12:02 | 743 | 743 µS/cm |
| 19 Sep 2025, 13:41 | 542 | 542 µS/cm |
| 21 Aug 2025, 10:46 | 734 | 734 µS/cm |
| 9 Jul 2025, 09:29 | 681 | 681 µS/cm |
| 9 Jun 2025, 13:23 | 704 | 704 µS/cm |
| 14 May 2025, 12:25 | 697 | 697 µS/cm |
| 30 Apr 2025, 13:52 | 649 | 649 µS/cm |
| 13 Mar 2025, 13:00 | 591 | 591 µS/cm |
| 10 Feb 2025, 12:09 | 587 | 587 µS/cm |
| 22 Jan 2025, 10:48 | 581 | 581 µS/cm |
| 3 Dec 2024, 13:08 | 417 | 417 µS/cm |
| 19 Nov 2024, 12:28 | 647 | 647 µS/cm |
| 21 Oct 2024, 12:18 | 450 | 450 µS/cm |
| 16 Sep 2024, 13:16 | 591 | 591 µS/cm |
| 19 Aug 2024, 10:47 | 729 | 729 µS/cm |
| 15 Jul 2024, 12:43 | 518 | 518 µS/cm |
| 27 Jun 2024, 12:32 | 686 | 686 µS/cm |
Everything measured here
60 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 60 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 24 | Jun 2024 – May 2026 | 96.1% 18 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Jun 2024 – May 2026 | 10.1 mg/l 18 May 2026 |
| Temperature of Water 0076 | River water | 24 | Jun 2024 – May 2026 | 12.9 °C 18 May 2026 |
| pH 0061 | River water | 24 | Jun 2024 – May 2026 | 7.86 18 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Jun 2024 – May 2026 | below 0.03 mg/l 18 May 2026 |
| Nitrate as N 0117 | River water | 24 | Jun 2024 – May 2026 | 13 mg/l 18 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Jun 2024 – May 2026 | 0.21 mg/l 18 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Jun 2024 – May 2026 | 717 µS/cm 18 May 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Jun 2024 – Feb 2025 | below 0.001 µg/l 10 Feb 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Jun 2024 – Feb 2025 | below 0.001 µg/l 10 Feb 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Jun 2024 – Feb 2025 | below 0.001 µg/l 10 Feb 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Jun 2024 – Feb 2025 | below 0.002 µg/l 10 Feb 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Jun 2024 – Feb 2025 | below 0.0005 µg/l 10 Feb 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Jun 2024 – Feb 2025 | below 0.001 µg/l 10 Feb 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Jun 2024 – Feb 2025 | below 0.0005 µg/l 10 Feb 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Jun 2024 – Feb 2025 | below 0.004 µg/l 10 Feb 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Jun 2024 – Feb 2025 | below 0.005 µg/l 10 Feb 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Jun 2024 – Feb 2025 | below 0.0005 µg/l 10 Feb 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Jun 2024 – Feb 2025 | below 0.002 µg/l 10 Feb 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 27 Jun 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Jun 2024 – Feb 2025 | below 0.0005 µg/l 10 Feb 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Jun 2024 – May 2026 | 160 mg/l 18 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Jun 2024 – May 2026 | below 0.00049 mg/l 18 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 24 | Jun 2024 – May 2026 | 1.5 mg/l 18 May 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Jun 2024 – Feb 2025 | below 0.001 µg/l 10 Feb 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Jun 2024 – Feb 2025 | below 0.002 µg/l 10 Feb 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Jun 2024 – Feb 2025 | below 0.002 µg/l 10 Feb 2025 |
| Nitrite as N 0118 | River water | 24 | Jun 2024 – May 2026 | 0.026 mg/l 18 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Jun 2024 – May 2026 | 13 mg/l 18 May 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Jun 2024 – Feb 2025 | below 0.0005 µg/l 10 Feb 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Jun 2024 – Feb 2025 | below 0.0005 µg/l 10 Feb 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Jun 2024 – Feb 2025 | below 0.0005 µg/l 10 Feb 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Jun 2024 – Feb 2025 | below 0.0005 µg/l 10 Feb 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Jun 2024 – Feb 2025 | 0.0011 µg/l 10 Feb 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Jun 2024 – Feb 2025 | 0.0081 µg/l 10 Feb 2025 |
| Perfluorobutanoic acid 2995 | River water | 2 | Jun 2024 – Feb 2025 | 0.0053 µg/l 10 Feb 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Jun 2024 – Feb 2025 | 0.0015 µg/l 10 Feb 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Jun 2024 – Feb 2025 | below 0.002 µg/l 10 Feb 2025 |
| Perfluorodecanoic acid 8892 | River water | 2 | Jun 2024 – Feb 2025 | below 0.002 µg/l 10 Feb 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Jun 2024 – Feb 2025 | below 0.005 µg/l 10 Feb 2025 |
| Perfluorododecanoic acid 8894 | River water | 2 | Jun 2024 – Feb 2025 | below 0.002 µg/l 10 Feb 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Jun 2024 – Feb 2025 | below 0.0005 µg/l 10 Feb 2025 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Jun 2024 – Feb 2025 | 0.003 µg/l 10 Feb 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Jun 2024 – Feb 2025 | below 0.0005 µg/l 10 Feb 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Jun 2024 – Feb 2025 | 0.0009 µg/l 10 Feb 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Jun 2024 – Feb 2025 | 0.004 µg/l 10 Feb 2025 |
| Perfluorohexanoic acid 8888 | River water | 2 | Jun 2024 – Feb 2025 | 0.0076 µg/l 10 Feb 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Jun 2024 – Feb 2025 | below 0.0005 µg/l 10 Feb 2025 |
| Perfluorononanoic acid 8891 | River water | 2 | Jun 2024 – Feb 2025 | below 0.001 µg/l 10 Feb 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jun 2024 – Feb 2025 | below 0.002 µg/l 10 Feb 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Jun 2024 – Feb 2025 | below 0.001 µg/l 10 Feb 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Jun 2024 – Feb 2025 | 0.0027 µg/l 10 Feb 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Jun 2024 – Feb 2025 | 0.0038 µg/l 10 Feb 2025 |
| Perfluorooctanoic acid 8890 | River water | 2 | Jun 2024 – Feb 2025 | 0.0043 µg/l 10 Feb 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Jun 2024 – Feb 2025 | 0.00058 µg/l 10 Feb 2025 |
| Perfluoropentanoic acid 8887 | River water | 2 | Jun 2024 – Feb 2025 | 0.0081 µg/l 10 Feb 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Jun 2024 – Feb 2025 | below 0.006 µg/l 10 Feb 2025 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Jun 2024 – Feb 2025 | below 0.005 µg/l 10 Feb 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Jun 2024 – Feb 2025 | below 0.004 µg/l 10 Feb 2025 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Jun 2024 – Feb 2025 | below 0.002 µg/l 10 Feb 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.