Derril Water North of Derril
EA name: DERRIL WATER NORTH OF DERRIL
Environment Agency sampling point SW-91211370 · 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
- 8 May 2026, 12:105 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
- 24 since 25 Jun 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 230756, 104072As published, to the nearest 1 m. Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- Not placedNo mapped watercourse within 500 m. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96.5%
Sampled 8 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 12:10 | 96.5 | 96.5% |
| 1 Apr 2026, 11:30 | 98.5 | 98.5% |
| 17 Mar 2026, 13:05 | 96 | 96% |
| 19 Feb 2026, 11:32 | 97.5 | 97.5% |
| 6 Jan 2026, 13:52 | 98.4 | 98.4% |
| 9 Dec 2025, 11:32 | 92.3 | 92.3% |
| 4 Nov 2025, 10:40 | 92.6 | 92.6% |
| 2 Oct 2025, 10:38 | 94.6 | 94.6% |
| 8 Sep 2025, 11:19 | 89.2 | 89.2% |
| 18 Aug 2025, 10:35 | 80.7 | 80.7% |
| 29 Jul 2025, 13:04 | 91.4 | 91.4% |
| 24 Jun 2025, 10:31 | 91.8 | 91.8% |
| 2 May 2025, 12:39 | 99.3 | 99.3% |
| 4 Apr 2025, 10:36 | 96.4 | 96.4% |
| 21 Mar 2025, 11:07 | 100.6 | 100.6% |
| 5 Feb 2025, 12:32 | 98.9 | 98.9% |
| 21 Jan 2025, 12:42 | 97.8 | 97.8% |
| 5 Dec 2024, 12:33 | 96 | 96% |
| 19 Nov 2024, 13:26 | 92.4 | 92.4% |
| 16 Oct 2024, 11:05 | 93.7 | 93.7% |
| 30 Sep 2024, 11:51 | 93.4 | 93.4% |
| 30 Aug 2024, 12:35 | 97.1 | 97.1% |
| 30 Jul 2024, 11:33 | 98.5 | 98.5% |
| 25 Jun 2024, 12:07 | 96.4 | 96.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.5 mg/l
Sampled 8 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 12:10 | 10.5 | 10.5 mg/l |
| 1 Apr 2026, 11:30 | 11.2 | 11.2 mg/l |
| 17 Mar 2026, 13:05 | 10.7 | 10.7 mg/l |
| 19 Feb 2026, 11:32 | 11.8 | 11.8 mg/l |
| 6 Jan 2026, 13:52 | 12.9 | 12.9 mg/l |
| 9 Dec 2025, 11:32 | 10.1 | 10.1 mg/l |
| 4 Nov 2025, 10:40 | 9.82 | 9.82 mg/l |
| 2 Oct 2025, 10:38 | 10.1 | 10.1 mg/l |
| 8 Sep 2025, 11:19 | 9.23 | 9.23 mg/l |
| 18 Aug 2025, 10:35 | 8.05 | 8.05 mg/l |
| 29 Jul 2025, 13:04 | 9.09 | 9.09 mg/l |
| 24 Jun 2025, 10:31 | 9.33 | 9.33 mg/l |
| 2 May 2025, 12:39 | 10.5 | 10.5 mg/l |
| 4 Apr 2025, 10:36 | 10.9 | 10.9 mg/l |
| 21 Mar 2025, 11:07 | 11.4 | 11.4 mg/l |
| 5 Feb 2025, 12:32 | 11.8 | 11.8 mg/l |
| 21 Jan 2025, 12:42 | 12.3 | 12.3 mg/l |
| 5 Dec 2024, 12:33 | 10.5 | 10.5 mg/l |
| 19 Nov 2024, 13:26 | 10.3 | 10.3 mg/l |
| 16 Oct 2024, 11:05 | 9.7 | 9.7 mg/l |
| 30 Sep 2024, 11:51 | 9.82 | 9.82 mg/l |
| 30 Aug 2024, 12:35 | 10.2 | 10.2 mg/l |
| 30 Jul 2024, 11:33 | 9.91 | 9.91 mg/l |
| 25 Jun 2024, 12:07 | 9.74 | 9.74 mg/l |
Water temperature
code 0076 · °C
11.3 °C
Sampled 8 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 12:10 | 11.3 | 11.3 °C |
| 1 Apr 2026, 11:30 | 9.6 | 9.6 °C |
| 17 Mar 2026, 13:05 | 10.6 | 10.6 °C |
| 19 Feb 2026, 11:32 | 7 | 7 °C |
| 6 Jan 2026, 13:52 | 3.9 | 3.9 °C |
| 9 Dec 2025, 11:32 | 11.4 | 11.4 °C |
| 4 Nov 2025, 10:40 | 12.6 | 12.6 °C |
| 2 Oct 2025, 10:38 | 12.4 | 12.4 °C |
| 8 Sep 2025, 11:19 | 13.7 | 13.7 °C |
| 18 Aug 2025, 10:35 | 15.4 | 15.4 °C |
| 29 Jul 2025, 13:04 | 15.5 | 15.5 °C |
| 24 Jun 2025, 10:31 | 14.5 | 14.5 °C |
| 2 May 2025, 12:39 | 12.9 | 12.9 °C |
| 4 Apr 2025, 10:36 | 9.7 | 9.7 °C |
| 21 Mar 2025, 11:07 | 9.6 | 9.6 °C |
| 5 Feb 2025, 12:32 | 7.6 | 7.6 °C |
| 21 Jan 2025, 12:42 | 5.5 | 5.5 °C |
| 5 Dec 2024, 12:33 | 11.1 | 11.1 °C |
| 19 Nov 2024, 13:26 | 10.3 | 10.3 °C |
| 16 Oct 2024, 11:05 | 13.7 | 13.7 °C |
| 30 Sep 2024, 11:51 | 13 | 13 °C |
| 30 Aug 2024, 12:35 | 13.1 | 13.1 °C |
| 30 Jul 2024, 11:33 | 15 | 15 °C |
| 25 Jun 2024, 12:07 | 14.8 | 14.8 °C |
pH
code 0061
7.5
Sampled 8 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 12:10 | 7.5 | 7.5 |
| 1 Apr 2026, 11:30 | 7.46 | 7.46 |
| 17 Mar 2026, 13:05 | 7.23 | 7.23 |
| 19 Feb 2026, 11:32 | 7.35 | 7.35 |
| 6 Jan 2026, 13:52 | 7.25 | 7.25 |
| 9 Dec 2025, 11:32 | 6.52 | 6.52 |
| 4 Nov 2025, 10:40 | 7.09 | 7.09 |
| 2 Oct 2025, 10:38 | 7.57 | 7.57 |
| 8 Sep 2025, 11:19 | 7.45 | 7.45 |
| 18 Aug 2025, 10:35 | 7.57 | 7.57 |
| 29 Jul 2025, 13:04 | 7.49 | 7.49 |
| 24 Jun 2025, 10:31 | 7.44 | 7.44 |
| 2 May 2025, 12:39 | 7.6 | 7.6 |
| 4 Apr 2025, 10:36 | 7.56 | 7.56 |
| 21 Mar 2025, 11:07 | 7.56 | 7.56 |
| 5 Feb 2025, 12:32 | 7.4 | 7.4 |
| 21 Jan 2025, 12:42 | 7.44 | 7.44 |
| 5 Dec 2024, 12:33 | 6.84 | 6.84 |
| 19 Nov 2024, 13:26 | 6.75 | 6.75 |
| 16 Oct 2024, 11:05 | 6.68 | 6.68 |
| 30 Sep 2024, 11:51 | 7.05 | 7.05 |
| 30 Aug 2024, 12:35 | 7.63 | 7.63 |
| 30 Jul 2024, 11:33 | 7.54 | 7.54 |
| 25 Jun 2024, 12:07 | 7.49 | 7.49 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 8 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 12:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Apr 2026, 11:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Mar 2026, 13:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Feb 2026, 11:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Jan 2026, 13:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Dec 2025, 11:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Nov 2025, 10:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Oct 2025, 10:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Sep 2025, 11:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Aug 2025, 10:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Jul 2025, 13:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Jun 2025, 10:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 May 2025, 12:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Apr 2025, 10:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Mar 2025, 11:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Feb 2025, 12:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Jan 2025, 12:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Dec 2024, 12:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Nov 2024, 13:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Oct 2024, 11:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Sep 2024, 11:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Aug 2024, 12:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Jul 2024, 11:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Jun 2024, 12:07 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.296 mg/l
Sampled 8 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 12:10 | 0.296 | 0.296 mg/l |
| 1 Apr 2026, 11:30 | 0.276 | 0.276 mg/l |
| 17 Mar 2026, 13:05 | 0.356 | 0.356 mg/l |
| 19 Feb 2026, 11:32 | 0.356 | 0.356 mg/l |
| 6 Jan 2026, 13:52 | 0.336 | 0.336 mg/l |
| 9 Dec 2025, 11:32 | 0.406 | 0.406 mg/l |
| 4 Nov 2025, 10:40 | 0.436 | 0.436 mg/l |
| 2 Oct 2025, 10:38 | 0.206 | 0.206 mg/l |
| 8 Sep 2025, 11:19 | 0.226 | 0.226 mg/l |
| 18 Aug 2025, 10:35 | 0.216 | 0.216 mg/l |
| 29 Jul 2025, 13:04 | 0.306 | 0.306 mg/l |
| 24 Jun 2025, 10:31 | 0.356 | 0.356 mg/l |
| 2 May 2025, 12:39 | 0.346 | 0.346 mg/l |
| 4 Apr 2025, 10:36 | 0.216 | 0.216 mg/l |
| 21 Mar 2025, 11:07 | 0.216 | 0.216 mg/l |
| 5 Feb 2025, 12:32 | 0.446 | 0.446 mg/l |
| 21 Jan 2025, 12:42 | 0.366 | 0.366 mg/l |
| 5 Dec 2024, 12:33 | 0.366 | 0.366 mg/l |
| 19 Nov 2024, 13:26 | 0.696 | 0.696 mg/l |
| 16 Oct 2024, 11:05 | 0.226 | 0.226 mg/l |
| 30 Sep 2024, 11:51 | 0.326 | 0.326 mg/l |
| 30 Aug 2024, 12:35 | <0.196 | below 0.196 mg/l (not detected above this) |
| 30 Jul 2024, 11:33 | 0.256 | 0.256 mg/l |
| 25 Jun 2024, 12:07 | 0.286 | 0.286 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.017 mg/l
Sampled 8 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 12:10 | 0.017 | 0.017 mg/l |
| 1 Apr 2026, 11:30 | 0.013 | 0.013 mg/l |
| 17 Mar 2026, 13:05 | <0.01 | below 0.01 mg/l (not detected above this) |
| 19 Feb 2026, 11:32 | <0.01 | below 0.01 mg/l (not detected above this) |
| 6 Jan 2026, 13:52 | 0.017 | 0.017 mg/l |
| 9 Dec 2025, 11:32 | 0.019 | 0.019 mg/l |
| 4 Nov 2025, 10:40 | 0.013 | 0.013 mg/l |
| 2 Oct 2025, 10:38 | <0.01 | below 0.01 mg/l (not detected above this) |
| 8 Sep 2025, 11:19 | 0.019 | 0.019 mg/l |
| 18 Aug 2025, 10:35 | 0.014 | 0.014 mg/l |
| 29 Jul 2025, 13:04 | 0.02 | 0.02 mg/l |
| 24 Jun 2025, 10:31 | 0.014 | 0.014 mg/l |
| 2 May 2025, 12:39 | <0.01 | below 0.01 mg/l (not detected above this) |
| 4 Apr 2025, 10:36 | <0.01 | below 0.01 mg/l (not detected above this) |
| 21 Mar 2025, 11:07 | <0.01 | below 0.01 mg/l (not detected above this) |
| 5 Feb 2025, 12:32 | <0.01 | below 0.01 mg/l (not detected above this) |
| 21 Jan 2025, 12:42 | <0.01 | below 0.01 mg/l (not detected above this) |
| 5 Dec 2024, 12:33 | 0.012 | 0.012 mg/l |
| 19 Nov 2024, 13:26 | <0.01 | below 0.01 mg/l (not detected above this) |
| 16 Oct 2024, 11:05 | 0.018 | 0.018 mg/l |
| 30 Sep 2024, 11:51 | 0.018 | 0.018 mg/l |
| 30 Aug 2024, 12:35 | 0.017 | 0.017 mg/l |
| 30 Jul 2024, 11:33 | 0.013 | 0.013 mg/l |
| 25 Jun 2024, 12:07 | 0.019 | 0.019 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
164 µS/cm
Sampled 8 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 12:10 | 164 | 164 µS/cm |
| 1 Apr 2026, 11:30 | 134 | 134 µS/cm |
| 17 Mar 2026, 13:05 | 125 | 125 µS/cm |
| 19 Feb 2026, 11:32 | 113 | 113 µS/cm |
| 6 Jan 2026, 13:52 | 139 | 139 µS/cm |
| 9 Dec 2025, 11:32 | 101 | 101 µS/cm |
| 4 Nov 2025, 10:40 | 143 | 143 µS/cm |
| 2 Oct 2025, 10:38 | 156 | 156 µS/cm |
| 8 Sep 2025, 11:19 | 164 | 164 µS/cm |
| 18 Aug 2025, 10:35 | 217 | 217 µS/cm |
| 29 Jul 2025, 13:04 | 182 | 182 µS/cm |
| 24 Jun 2025, 10:31 | 159 | 159 µS/cm |
| 2 May 2025, 12:39 | 152 | 152 µS/cm |
| 4 Apr 2025, 10:36 | 169 | 169 µS/cm |
| 21 Mar 2025, 11:07 | 162 | 162 µS/cm |
| 5 Feb 2025, 12:32 | 147 | 147 µS/cm |
| 21 Jan 2025, 12:42 | 153 | 153 µS/cm |
| 5 Dec 2024, 12:33 | 110 | 110 µS/cm |
| 19 Nov 2024, 13:26 | 113 | 113 µS/cm |
| 16 Oct 2024, 11:05 | 104 | 104 µS/cm |
| 30 Sep 2024, 11:51 | 130 | 130 µS/cm |
| 30 Aug 2024, 12:35 | 185 | 185 µS/cm |
| 30 Jul 2024, 11:33 | 157 | 157 µS/cm |
| 25 Jun 2024, 12:07 | 168 | 168 µS/cm |
Everything measured here
73 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 73 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 24 | Jun 2024 – May 2026 | 96.5% 8 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Jun 2024 – May 2026 | 10.5 mg/l 8 May 2026 |
| Temperature of Water 0076 | River water | 24 | Jun 2024 – May 2026 | 11.3 °C 8 May 2026 |
| pH 0061 | River water | 24 | Jun 2024 – May 2026 | 7.5 8 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Jun 2024 – May 2026 | below 0.03 mg/l 8 May 2026 |
| Nitrate as N 0117 | River water | 24 | Jun 2024 – May 2026 | 0.296 mg/l 8 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Jun 2024 – May 2026 | 0.017 mg/l 8 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Jun 2024 – May 2026 | 164 µS/cm 8 May 2026 |
| 10:2 Fluorotelomer sulfonic acid 2994 | River water | 1 | Dec 2025 – Dec 2025 | below 0.002 µg/l 9 Dec 2025 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 2H-Perfluoro-2-decenoic acid 2888 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 9 Dec 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| 5:1:2 Fluorotelomer betaine 2887 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| 5:3 Fluorotelomer betaine 2886 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| 6:2 Fluorotelomer phosphate diester 2986 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 9 Dec 2025 |
| 6:2 Fluorotelomer sulfonamide amine oxide (6:2 FTNO) (Capstone A) 2841 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 6:2 Fluorotelomer sulfonamide betaine 2985 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 6:2/8:2 Fluorotelomer phosphate diester 2884 | River water | 1 | Dec 2025 – Dec 2025 | below 0.01 µg/l 9 Dec 2025 |
| 6:6 Perfluorophosphinic acid 2883 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 9 Dec 2025 |
| 6:8 Perfluorophosphinic acid 2882 | River water | 1 | Dec 2025 – Dec 2025 | below 0.01 µg/l 9 Dec 2025 |
| 8:2 Fluorotelomer phosphate diester 2880 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 9 Dec 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| 8:8 Perfluorophosphinic acid 2879 | River water | 1 | Dec 2025 – Dec 2025 | below 0.01 µg/l 9 Dec 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Jun 2024 – May 2026 | 38 mg/l 8 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Jun 2024 – May 2026 | below 0.00019 mg/l 8 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 24 | Jun 2024 – May 2026 | 1.1 mg/l 8 May 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Hexafluoropropylene oxide trimer acid 2980 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Dec 2025 – Dec 2025 | below 0.002 µg/l 9 Dec 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Dec 2025 – Dec 2025 | below 0.002 µg/l 9 Dec 2025 |
| Nitrite as N 0118 | River water | 24 | Jun 2024 – May 2026 | below 0.004 mg/l 8 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Jun 2024 – May 2026 | 0.3 mg/l 8 May 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorobutanoic acid 2995 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorodecanoic acid 8892 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Dec 2025 – Dec 2025 | below 0.005 µg/l 9 Dec 2025 |
| Perfluorododecanoic acid 8894 | River water | 1 | Dec 2025 – Dec 2025 | below 0.002 µg/l 9 Dec 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluorohexanoic acid 8888 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluorononanoic acid 8891 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | Dec 2025 – Dec 2025 | below 0.002 µg/l 9 Dec 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluorooctanesulfonic acid (total) 2958 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorooctanoic acid 8890 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 9 Dec 2025 |
| Perfluoropentanoic acid 8887 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Dec 2025 – Dec 2025 | below 0.006 µg/l 9 Dec 2025 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Dec 2025 – Dec 2025 | below 0.002 µg/l 9 Dec 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 9 Dec 2025 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 9 Dec 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.