Swale at Downholme Bridge
EA name: SWALE AT DOWNHOLME BRIDGE
Environment Agency sampling point NE-49905168 · 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
- 29 Apr 2026, 08:265 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
- 25 since 19 Apr 2024 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 411343, 499155As published, to the nearest 1 m. Open in a map
- River, by its own name
- Swale
- River, by the map
- River SwalePlaced on the river its name gives, 3 m from the line.
- Next gauge downstream
- Richmond Lownthwaite Bridge On the River Swale · 6.0 km along the river
- Nearest gauge upstream
- Grinton Bridge On the River Swale · 8.4 km along the river
- Why it was sampled
- Monitoring (national agency policy) (15 samples)
Environmental monitoring statutory (EU directives) (10 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
102.6%
Sampled 29 Apr 2026, 5 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 Apr 2026, 08:26 | 102.6 | 102.6% |
| 5 Mar 2026, 14:04 | 106.1 | 106.1% |
| 6 Feb 2026, 09:52 | 101.2 | 101.2% |
| 9 Jan 2026, 11:29 | 99.8 | 99.8% |
| 16 Dec 2025, 09:33 | 101.3 | 101.3% |
| 27 Nov 2025, 12:57 | 102.2 | 102.2% |
| 31 Oct 2025, 12:27 | 103.4 | 103.4% |
| 11 Sep 2025, 09:20 | 98.4 | 98.4% |
| 20 Aug 2025, 12:54 | 108.8 | 108.8% |
| 2 Jul 2025, 11:02 | 108.8 | 108.8% |
| 9 Jun 2025, 09:25 | 106.1 | 106.1% |
| 30 May 2025, 09:55 | 101.5 | 101.5% |
| 24 Apr 2025, 08:46 | 101.5 | 101.5% |
| 4 Mar 2025, 08:12 | 100.2 | 100.2% |
| 5 Feb 2025, 13:32 | 103.9 | 103.9% |
| 20 Jan 2025, 10:04 | 100.8 | 100.8% |
| 3 Dec 2024, 09:51 | 99.6 | 99.6% |
| 18 Nov 2024, 11:02 | 103.8 | 103.8% |
| 23 Oct 2024, 09:29 | 100 | 100% |
| 17 Sep 2024, 12:01 | 104.4 | 104.4% |
| 22 Aug 2024, 13:30 | 112.1 | 112.1% |
| 31 Jul 2024, 12:13 | 116.3 | 116.3% |
| 19 Jun 2024, 13:04 | 107.2 | 107.2% |
| 13 May 2024, 09:17 | 100.9 | 100.9% |
| 19 Apr 2024, 08:27 | 102.5 | 102.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
12 mg/l
Sampled 29 Apr 2026, 5 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 Apr 2026, 08:26 | 12 | 12 mg/l |
| 5 Mar 2026, 14:04 | 12.7 | 12.7 mg/l |
| 6 Feb 2026, 09:52 | 13.1 | 13.1 mg/l |
| 9 Jan 2026, 11:29 | 13.4 | 13.4 mg/l |
| 16 Dec 2025, 09:33 | 12.5 | 12.5 mg/l |
| 27 Nov 2025, 12:57 | 11.7 | 11.7 mg/l |
| 31 Oct 2025, 12:27 | 11.8 | 11.8 mg/l |
| 11 Sep 2025, 09:20 | 10.4 | 10.4 mg/l |
| 20 Aug 2025, 12:54 | 10.9 | 10.9 mg/l |
| 2 Jul 2025, 11:02 | 10.6 | 10.6 mg/l |
| 9 Jun 2025, 09:25 | 11.5 | 11.5 mg/l |
| 30 May 2025, 09:55 | 10.8 | 10.8 mg/l |
| 24 Apr 2025, 08:46 | 11.5 | 11.5 mg/l |
| 4 Mar 2025, 08:12 | 12.5 | 12.5 mg/l |
| 5 Feb 2025, 13:32 | 12.7 | 12.7 mg/l |
| 20 Jan 2025, 10:04 | 13.2 | 13.2 mg/l |
| 3 Dec 2024, 09:51 | 12.5 | 12.5 mg/l |
| 18 Nov 2024, 11:02 | 13.5 | 13.5 mg/l |
| 23 Oct 2024, 09:29 | 11.8 | 11.8 mg/l |
| 17 Sep 2024, 12:01 | 11.3 | 11.3 mg/l |
| 22 Aug 2024, 13:30 | 11.2 | 11.2 mg/l |
| 31 Jul 2024, 12:13 | 11 | 11 mg/l |
| 19 Jun 2024, 13:04 | 11 | 11 mg/l |
| 13 May 2024, 09:17 | 10.4 | 10.4 mg/l |
| 19 Apr 2024, 08:27 | 12.4 | 12.4 mg/l |
Water temperature
code 0076 · °C
8.3 °C
Sampled 29 Apr 2026, 5 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 Apr 2026, 08:26 | 8.3 | 8.3 °C |
| 5 Mar 2026, 14:04 | 7.6 | 7.6 °C |
| 6 Feb 2026, 09:52 | 4.3 | 4.3 °C |
| 9 Jan 2026, 11:29 | 3.1 | 3.1 °C |
| 16 Dec 2025, 09:33 | 6.4 | 6.4 °C |
| 27 Nov 2025, 12:57 | 9.2 | 9.2 °C |
| 31 Oct 2025, 12:27 | 9.4 | 9.4 °C |
| 11 Sep 2025, 09:20 | 12.6 | 12.6 °C |
| 20 Aug 2025, 12:54 | 15.1 | 15.1 °C |
| 2 Jul 2025, 11:02 | 16.3 | 16.3 °C |
| 9 Jun 2025, 09:25 | 11.8 | 11.8 °C |
| 30 May 2025, 09:55 | 12.5 | 12.5 °C |
| 24 Apr 2025, 08:46 | 9.7 | 9.7 °C |
| 4 Mar 2025, 08:12 | 5.8 | 5.8 °C |
| 5 Feb 2025, 13:32 | 6.6 | 6.6 °C |
| 20 Jan 2025, 10:04 | 4 | 4 °C |
| 3 Dec 2024, 09:51 | 5.5 | 5.5 °C |
| 18 Nov 2024, 11:02 | 4.2 | 4.2 °C |
| 23 Oct 2024, 09:29 | 8.1 | 8.1 °C |
| 17 Sep 2024, 12:01 | 11.7 | 11.7 °C |
| 22 Aug 2024, 13:30 | 15.3 | 15.3 °C |
| 31 Jul 2024, 12:13 | 17.7 | 17.7 °C |
| 19 Jun 2024, 13:04 | 13.9 | 13.9 °C |
| 13 May 2024, 09:17 | 13.7 | 13.7 °C |
| 19 Apr 2024, 08:27 | 7.1 | 7.1 °C |
pH
code 0061
8.45
Sampled 29 Apr 2026, 5 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 Apr 2026, 08:26 | 8.45 | 8.45 |
| 5 Mar 2026, 14:04 | 8.73 | 8.73 |
| 6 Feb 2026, 09:52 | 7.89 | 7.89 |
| 9 Jan 2026, 11:29 | 8.3 | 8.3 |
| 16 Dec 2025, 09:33 | 7.82 | 7.82 |
| 27 Nov 2025, 12:57 | 8.26 | 8.26 |
| 31 Oct 2025, 12:27 | 8.01 | 8.01 |
| 11 Sep 2025, 09:20 | 8.47 | 8.47 |
| 20 Aug 2025, 12:54 | 8.59 | 8.59 |
| 2 Jul 2025, 11:02 | 8.31 | 8.31 |
| 9 Jun 2025, 09:25 | 8.26 | 8.26 |
| 30 May 2025, 09:55 | 7.92 | 7.92 |
| 24 Apr 2025, 08:46 | 8.43 | 8.43 |
| 4 Mar 2025, 08:12 | 8.4 | 8.4 |
| 5 Feb 2025, 13:32 | 8.26 | 8.26 |
| 20 Jan 2025, 10:04 | 8.26 | 8.26 |
| 3 Dec 2024, 09:51 | 8.23 | 8.23 |
| 18 Nov 2024, 11:02 | 8.43 | 8.43 |
| 23 Oct 2024, 09:29 | 8.03 | 8.03 |
| 17 Sep 2024, 12:01 | 8.16 | 8.16 |
| 22 Aug 2024, 13:30 | 8.38 | 8.38 |
| 31 Jul 2024, 12:13 | 8.6 | 8.6 |
| 19 Jun 2024, 13:04 | 8.69 | 8.69 |
| 13 May 2024, 09:17 | 8 | 8 |
| 19 Apr 2024, 08:27 | 8.27 | 8.27 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 29 Apr 2026, 5 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 Apr 2026, 08:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2026, 14:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Feb 2026, 09:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jan 2026, 11:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Dec 2025, 09:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Nov 2025, 12:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 31 Oct 2025, 12:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Sep 2025, 09:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Aug 2025, 12:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jul 2025, 11:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jun 2025, 09:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 May 2025, 09:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Apr 2025, 08:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2025, 08:12 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Feb 2025, 13:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jan 2025, 10:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Dec 2024, 09:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Nov 2024, 11:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Oct 2024, 09:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Sep 2024, 12:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Aug 2024, 13:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 31 Jul 2024, 12:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Jun 2024, 13:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 May 2024, 09:17 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Apr 2024, 08:27 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.476 mg/l
Sampled 29 Apr 2026, 5 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 Apr 2026, 08:26 | 0.476 | 0.476 mg/l |
| 5 Mar 2026, 14:04 | 0.746 | 0.746 mg/l |
| 6 Feb 2026, 09:52 | 0.636 | 0.636 mg/l |
| 9 Jan 2026, 11:29 | 0.816 | 0.816 mg/l |
| 16 Dec 2025, 09:33 | 0.426 | 0.426 mg/l |
| 27 Nov 2025, 12:57 | 0.686 | 0.686 mg/l |
| 31 Oct 2025, 12:27 | 0.316 | 0.316 mg/l |
| 11 Sep 2025, 09:20 | 0.296 | 0.296 mg/l |
| 20 Aug 2025, 12:54 | 0.306 | 0.306 mg/l |
| 2 Jul 2025, 11:02 | 0.406 | 0.406 mg/l |
| 9 Jun 2025, 09:25 | 0.276 | 0.276 mg/l |
| 30 May 2025, 09:55 | 0.306 | 0.306 mg/l |
| 24 Apr 2025, 08:46 | 0.546 | 0.546 mg/l |
| 4 Mar 2025, 08:12 | 0.696 | 0.696 mg/l |
| 5 Feb 2025, 13:32 | 0.826 | 0.826 mg/l |
| 20 Jan 2025, 10:04 | 0.956 | 0.956 mg/l |
| 3 Dec 2024, 09:51 | 0.326 | 0.326 mg/l |
| 18 Nov 2024, 11:02 | 0.486 | 0.486 mg/l |
| 23 Oct 2024, 09:29 | 0.366 | 0.366 mg/l |
| 17 Sep 2024, 12:01 | <0.196 | below 0.196 mg/l (not detected above this) |
| 22 Aug 2024, 13:30 | 0.236 | 0.236 mg/l |
| 31 Jul 2024, 12:13 | 0.406 | 0.406 mg/l |
| 19 Jun 2024, 13:04 | 0.586 | 0.586 mg/l |
| 13 May 2024, 09:17 | 0.326 | 0.326 mg/l |
| 19 Apr 2024, 08:27 | 0.636 | 0.636 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
below 0.01 mg/l (not detected above this)
Sampled 29 Apr 2026, 5 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 Apr 2026, 08:26 | <0.01 | below 0.01 mg/l (not detected above this) |
| 5 Mar 2026, 14:04 | 0.012 | 0.012 mg/l |
| 6 Feb 2026, 09:52 | <0.01 | below 0.01 mg/l (not detected above this) |
| 9 Jan 2026, 11:29 | <0.01 | below 0.01 mg/l (not detected above this) |
| 16 Dec 2025, 09:33 | <0.01 | below 0.01 mg/l (not detected above this) |
| 27 Nov 2025, 12:57 | <0.01 | below 0.01 mg/l (not detected above this) |
| 31 Oct 2025, 12:27 | <0.01 | below 0.01 mg/l (not detected above this) |
| 11 Sep 2025, 09:20 | <0.01 | below 0.01 mg/l (not detected above this) |
| 20 Aug 2025, 12:54 | <0.01 | below 0.01 mg/l (not detected above this) |
| 2 Jul 2025, 11:02 | <0.01 | below 0.01 mg/l (not detected above this) |
| 9 Jun 2025, 09:25 | <0.01 | below 0.01 mg/l (not detected above this) |
| 30 May 2025, 09:55 | <0.01 | below 0.01 mg/l (not detected above this) |
| 24 Apr 2025, 08:46 | <0.01 | below 0.01 mg/l (not detected above this) |
| 4 Mar 2025, 08:12 | <0.01 | below 0.01 mg/l (not detected above this) |
| 5 Feb 2025, 13:32 | <0.01 | below 0.01 mg/l (not detected above this) |
| 20 Jan 2025, 10:04 | <0.01 | below 0.01 mg/l (not detected above this) |
| 3 Dec 2024, 09:51 | <0.01 | below 0.01 mg/l (not detected above this) |
| 18 Nov 2024, 11:02 | <0.01 | below 0.01 mg/l (not detected above this) |
| 23 Oct 2024, 09:29 | <0.01 | below 0.01 mg/l (not detected above this) |
| 17 Sep 2024, 12:01 | <0.01 | below 0.01 mg/l (not detected above this) |
| 22 Aug 2024, 13:30 | <0.01 | below 0.01 mg/l (not detected above this) |
| 31 Jul 2024, 12:13 | <0.01 | below 0.01 mg/l (not detected above this) |
| 19 Jun 2024, 13:04 | <0.01 | below 0.01 mg/l (not detected above this) |
| 13 May 2024, 09:17 | <0.01 | below 0.01 mg/l (not detected above this) |
| 19 Apr 2024, 08:27 | <0.01 | below 0.01 mg/l (not detected above this) |
Conductivity
at 25 °C · code 0077 · µS/cm
289 µS/cm
Sampled 29 Apr 2026, 5 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 29 Apr 2026, 08:26 | 289 | 289 µS/cm |
| 5 Mar 2026, 14:04 | 258 | 258 µS/cm |
| 6 Feb 2026, 09:52 | 154 | 154 µS/cm |
| 9 Jan 2026, 11:29 | 298 | 298 µS/cm |
| 16 Dec 2025, 09:33 | 118 | 118 µS/cm |
| 27 Nov 2025, 12:57 | 221 | 221 µS/cm |
| 31 Oct 2025, 12:27 | 173 | 173 µS/cm |
| 11 Sep 2025, 09:20 | 327 | 327 µS/cm |
| 20 Aug 2025, 12:54 | 313 | 313 µS/cm |
| 2 Jul 2025, 11:02 | 200 | 200 µS/cm |
| 9 Jun 2025, 09:25 | 142 | 142 µS/cm |
| 30 May 2025, 09:55 | 103 | 103 µS/cm |
| 24 Apr 2025, 08:46 | 320 | 320 µS/cm |
| 4 Mar 2025, 08:12 | 262 | 262 µS/cm |
| 5 Feb 2025, 13:32 | 255 | 255 µS/cm |
| 20 Jan 2025, 10:04 | 261 | 261 µS/cm |
| 3 Dec 2024, 09:51 | 138 | 138 µS/cm |
| 18 Nov 2024, 11:02 | 227 | 227 µS/cm |
| 23 Oct 2024, 09:29 | 170 | 170 µS/cm |
| 17 Sep 2024, 12:01 | 178 | 178 µS/cm |
| 22 Aug 2024, 13:30 | 188 | 188 µS/cm |
| 31 Jul 2024, 12:13 | 298 | 298 µS/cm |
| 19 Jun 2024, 13:04 | 300 | 300 µS/cm |
| 13 May 2024, 09:17 | 141 | 141 µS/cm |
| 19 Apr 2024, 08:27 | 215 | 215 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 | 25 | Apr 2024 – Apr 2026 | 102.6% 29 Apr 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 25 | Apr 2024 – Apr 2026 | 12 mg/l 29 Apr 2026 |
| Temperature of Water 0076 | River water | 25 | Apr 2024 – Apr 2026 | 8.3 °C 29 Apr 2026 |
| pH 0061 | River water | 25 | Apr 2024 – Apr 2026 | 8.45 29 Apr 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 25 | Apr 2024 – Apr 2026 | below 0.03 mg/l 29 Apr 2026 |
| Nitrate as N 0117 | River water | 25 | Apr 2024 – Apr 2026 | 0.476 mg/l 29 Apr 2026 |
| Orthophosphate, reactive as P 0180 | River water | 25 | Apr 2024 – Apr 2026 | below 0.01 mg/l 29 Apr 2026 |
| Conductivity at 25 C 0077 | River water | 25 | Apr 2024 – Apr 2026 | 289 µS/cm 29 Apr 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 22 Aug 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 22 Aug 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 22 Aug 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 22 Aug 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 22 Aug 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Jun 2024 – Aug 2024 | below 0.004 µg/l 22 Aug 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Jun 2024 – Aug 2024 | below 0.005 µg/l 22 Aug 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Jun 2024 – Aug 2024 | 0.002 µg/l 22 Aug 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 22 Aug 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 25 | Apr 2024 – Apr 2026 | 130 mg/l 29 Apr 2026 |
| Ammonia un-ionised as N 0119 | River water | 25 | Apr 2024 – Apr 2026 | below 0.00048 mg/l 29 Apr 2026 |
| BOD : 5 Day ATU 0085 | River water | 24 | Apr 2024 – Apr 2026 | 1.2 mg/l 29 Apr 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 22 Aug 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 22 Aug 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 22 Aug 2024 |
| Nitrite as N 0118 | River water | 25 | Apr 2024 – Apr 2026 | below 0.004 mg/l 29 Apr 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 25 | Apr 2024 – Apr 2026 | 0.48 mg/l 29 Apr 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 22 Aug 2024 |
| Perfluorobutanoic acid 2995 | River water | 2 | Jun 2024 – Aug 2024 | 0.0015 µg/l 22 Aug 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 22 Aug 2024 |
| Perfluorodecanoic acid 8892 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 22 Aug 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Jun 2024 – Aug 2024 | below 0.005 µg/l 22 Aug 2024 |
| Perfluorododecanoic acid 8894 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 22 Aug 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 22 Aug 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Perfluorohexanoic acid 8888 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Perfluorononanoic acid 8891 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 22 Aug 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 22 Aug 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Jun 2024 – Aug 2024 | below 0.001 µg/l 22 Aug 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Perfluorooctanoic acid 8890 | River water | 2 | Jun 2024 – Aug 2024 | 0.0013 µg/l 22 Aug 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Jun 2024 – Aug 2024 | below 0.0005 µg/l 22 Aug 2024 |
| Perfluoropentanoic acid 8887 | River water | 2 | Jun 2024 – Aug 2024 | below 0.004 µg/l 22 Aug 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Jun 2024 – Aug 2024 | below 0.006 µg/l 22 Aug 2024 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Jun 2024 – Aug 2024 | below 0.005 µg/l 22 Aug 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Jun 2024 – Aug 2024 | below 0.004 µg/l 22 Aug 2024 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Jun 2024 – Aug 2024 | below 0.002 µg/l 22 Aug 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.