Northlew Stream at Northlew
EA name: NORTHLEW STREAM AT NORTHLEW
Environment Agency sampling point SW-72932015 · 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
- 2 Sep 2026, 13:2929 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 22 since 13 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring)
- Where
- National Grid 250750, 99100As published, to the nearest 10 m. Open in a map
- River, by its own name
- Northlew Stream
- River, by the map
- Not placedIts name gives Northlew Stream; the only line close by, 2 m away, is River Lew and is not traced into it. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Planned investigation (local monitoring) (15 samples)
Monitoring (national agency policy) (7 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
83.1%
Sampled 2 Sep 2026, 29 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 13:29 | 83.1 | 83.1% |
| 19 Aug 2026, 11:34 | 41.4 | 41.4% |
| 3 Jul 2026, 12:13 | 85.8 | 85.8% |
| 8 Jun 2026, 10:25 | 92.9 | 92.9% |
| 5 May 2026, 12:41 | 95.9 | 95.9% |
| 20 Apr 2026, 09:56 | 98.7 | 98.7% |
| 6 Mar 2025, 11:40 | 100.1 | 100.1% |
| 6 Feb 2025, 10:41 | 98.6 | 98.6% |
| 3 Jan 2025, 12:54 | 97.5 | 97.5% |
| 10 Dec 2024, 11:42 | 97.3 | 97.3% |
| 26 Nov 2024, 12:41 | 99.1 | 99.1% |
| 14 Oct 2024, 11:31 | 100.6 | 100.6% |
| 13 Sep 2024, 10:31 | 100.4 | 100.4% |
| 8 Aug 2024, 10:58 | 92 | 92% |
| 2 Jul 2024, 11:54 | 90.9 | 90.9% |
| 7 Jun 2024, 10:44 | 97.4 | 97.4% |
| 25 Mar 2024, 15:17 | 96.7 | 96.7% |
| 19 Feb 2024, 12:57 | 99.1 | 99.1% |
| 12 Jan 2024, 11:26 | 98.7 | 98.7% |
| 7 Dec 2023, 10:56 | 99.1 | 99.1% |
| 16 Nov 2023, 10:20 | 95.6 | 95.6% |
| 13 Oct 2023, 10:45 | 97 | 97% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.11 mg/l
Sampled 2 Sep 2026, 29 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 13:29 | 8.11 | 8.11 mg/l |
| 19 Aug 2026, 11:34 | 3.92 | 3.92 mg/l |
| 3 Jul 2026, 12:13 | 8.39 | 8.39 mg/l |
| 8 Jun 2026, 10:25 | 9.68 | 9.68 mg/l |
| 5 May 2026, 12:41 | 10.3 | 10.3 mg/l |
| 20 Apr 2026, 09:56 | 11.7 | 11.7 mg/l |
| 6 Mar 2025, 11:40 | 12.6 | 12.6 mg/l |
| 6 Feb 2025, 10:41 | 13 | 13 mg/l |
| 3 Jan 2025, 12:54 | 12.6 | 12.6 mg/l |
| 10 Dec 2024, 11:42 | 11.6 | 11.6 mg/l |
| 26 Nov 2024, 12:41 | 11.4 | 11.4 mg/l |
| 14 Oct 2024, 11:31 | 10.7 | 10.7 mg/l |
| 13 Sep 2024, 10:31 | 11.7 | 11.7 mg/l |
| 8 Aug 2024, 10:58 | 9.08 | 9.08 mg/l |
| 2 Jul 2024, 11:54 | 9.3 | 9.3 mg/l |
| 7 Jun 2024, 10:44 | 10.4 | 10.4 mg/l |
| 25 Mar 2024, 15:17 | 11 | 11 mg/l |
| 19 Feb 2024, 12:57 | 11 | 11 mg/l |
| 12 Jan 2024, 11:26 | 12.5 | 12.5 mg/l |
| 7 Dec 2023, 10:56 | 11.2 | 11.2 mg/l |
| 16 Nov 2023, 10:20 | 11 | 11 mg/l |
| 13 Oct 2023, 10:45 | 9.61 | 9.61 mg/l |
Water temperature
code 0076 · °C
16.4 °C
Sampled 2 Sep 2026, 29 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 13:29 | 16.4 | 16.4 °C |
| 19 Aug 2026, 11:34 | 17.9 | 17.9 °C |
| 3 Jul 2026, 12:13 | 16.3 | 16.3 °C |
| 8 Jun 2026, 10:25 | 13.4 | 13.4 °C |
| 5 May 2026, 12:41 | 12.1 | 12.1 °C |
| 20 Apr 2026, 09:56 | 7.8 | 7.8 °C |
| 6 Mar 2025, 11:40 | 5.6 | 5.6 °C |
| 6 Feb 2025, 10:41 | 3.8 | 3.8 °C |
| 3 Jan 2025, 12:54 | 4.4 | 4.4 °C |
| 10 Dec 2024, 11:42 | 7.6 | 7.6 °C |
| 26 Nov 2024, 12:41 | 9 | 9 °C |
| 14 Oct 2024, 11:31 | 12.6 | 12.6 °C |
| 13 Sep 2024, 10:31 | 8.7 | 8.7 °C |
| 8 Aug 2024, 10:58 | 15.9 | 15.9 °C |
| 2 Jul 2024, 11:54 | 14.2 | 14.2 °C |
| 7 Jun 2024, 10:44 | 12.1 | 12.1 °C |
| 25 Mar 2024, 15:17 | 9.5 | 9.5 °C |
| 19 Feb 2024, 12:57 | 10.5 | 10.5 °C |
| 12 Jan 2024, 11:26 | 5.3 | 5.3 °C |
| 7 Dec 2023, 10:56 | 9.7 | 9.7 °C |
| 16 Nov 2023, 10:20 | 9 | 9 °C |
| 13 Oct 2023, 10:45 | 15.7 | 15.7 °C |
pH
code 0061
7.13
Sampled 2 Sep 2026, 29 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 13:29 | 7.13 | 7.13 |
| 19 Aug 2026, 11:34 | 7.19 | 7.19 |
| 3 Jul 2026, 12:13 | 7.34 | 7.34 |
| 8 Jun 2026, 10:25 | 7.57 | 7.57 |
| 5 May 2026, 12:41 | 7.28 | 7.28 |
| 20 Apr 2026, 09:56 | 7.54 | 7.54 |
| 6 Mar 2025, 11:40 | 7.29 | 7.29 |
| 6 Feb 2025, 10:41 | 7.27 | 7.27 |
| 3 Jan 2025, 12:54 | 7.38 | 7.38 |
| 10 Dec 2024, 11:42 | 7.01 | 7.01 |
| 26 Nov 2024, 12:41 | 7.16 | 7.16 |
| 14 Oct 2024, 11:31 | 7.97 | 7.97 |
| 13 Sep 2024, 10:31 | 7.48 | 7.48 |
| 8 Aug 2024, 10:58 | 7.58 | 7.58 |
| 2 Jul 2024, 11:54 | 7.28 | 7.28 |
| 7 Jun 2024, 10:44 | 7.49 | 7.49 |
| 25 Mar 2024, 15:17 | 7.23 | 7.23 |
| 19 Feb 2024, 12:57 | 7.1 | 7.1 |
| 12 Jan 2024, 11:26 | 7.28 | 7.28 |
| 7 Dec 2023, 10:56 | 6.9 | 6.9 |
| 16 Nov 2023, 10:20 | 7.76 | 7.76 |
| 13 Oct 2023, 10:45 | 6.9 | 6.9 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.097 mg/l
Sampled 2 Sep 2026, 29 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 13:29 | 0.097 | 0.097 mg/l |
| 19 Aug 2026, 11:34 | 4.1 | 4.1 mg/l |
| 3 Jul 2026, 12:13 | 0.11 | 0.11 mg/l |
| 8 Jun 2026, 10:25 | 0.034 | 0.034 mg/l |
| 5 May 2026, 12:41 | 0.095 | 0.095 mg/l |
| 20 Apr 2026, 09:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Mar 2025, 11:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Feb 2025, 10:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jan 2025, 12:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Dec 2024, 11:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Nov 2024, 12:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Oct 2024, 11:31 | 0.051 | 0.051 mg/l |
| 13 Sep 2024, 10:31 | 0.032 | 0.032 mg/l |
| 8 Aug 2024, 10:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jul 2024, 11:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Jun 2024, 10:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Mar 2024, 15:17 | 0.092 | 0.092 mg/l |
| 19 Feb 2024, 12:57 | 0.054 | 0.054 mg/l |
| 12 Jan 2024, 11:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Dec 2023, 10:56 | 0.035 | 0.035 mg/l |
| 16 Nov 2023, 10:20 | 0.11 | 0.11 mg/l |
| 13 Oct 2023, 10:45 | 0.046 | 0.046 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.35 mg/l
Sampled 2 Sep 2026, 29 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 13:29 | 2.35 | 2.35 mg/l |
| 19 Aug 2026, 11:34 | 16.1 | 16.1 mg/l |
| 3 Jul 2026, 12:13 | 1.47 | 1.47 mg/l |
| 8 Jun 2026, 10:25 | 1.09 | 1.09 mg/l |
| 5 May 2026, 12:41 | 1.09 | 1.09 mg/l |
| 20 Apr 2026, 09:56 | 1.2 | 1.2 mg/l |
| 6 Mar 2025, 11:40 | 1.8 | 1.8 mg/l |
| 6 Feb 2025, 10:41 | 1.8 | 1.8 mg/l |
| 3 Jan 2025, 12:54 | 2.1 | 2.1 mg/l |
| 10 Dec 2024, 11:42 | 2.2 | 2.2 mg/l |
| 26 Nov 2024, 12:41 | 2.5 | 2.5 mg/l |
| 14 Oct 2024, 11:31 | 1.69 | 1.69 mg/l |
| 13 Sep 2024, 10:31 | 1.59 | 1.59 mg/l |
| 8 Aug 2024, 10:58 | 1.99 | 1.99 mg/l |
| 2 Jul 2024, 11:54 | 2.29 | 2.29 mg/l |
| 7 Jun 2024, 10:44 | 1.89 | 1.89 mg/l |
| 25 Mar 2024, 15:17 | 0.991 | 0.991 mg/l |
| 19 Feb 2024, 12:57 | 2.19 | 2.19 mg/l |
| 12 Jan 2024, 11:26 | 2 | 2 mg/l |
| 7 Dec 2023, 10:56 | 2.3 | 2.3 mg/l |
| 16 Nov 2023, 10:20 | 1.3 | 1.3 mg/l |
| 13 Oct 2023, 10:45 | 1.99 | 1.99 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.3 mg/l
Sampled 2 Sep 2026, 29 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 13:29 | 0.3 | 0.3 mg/l |
| 19 Aug 2026, 11:34 | 5.1 | 5.1 mg/l |
| 3 Jul 2026, 12:13 | 0.17 | 0.17 mg/l |
| 8 Jun 2026, 10:25 | 0.048 | 0.048 mg/l |
| 5 May 2026, 12:41 | 0.087 | 0.087 mg/l |
| 20 Apr 2026, 09:56 | 0.032 | 0.032 mg/l |
| 6 Mar 2025, 11:40 | 0.028 | 0.028 mg/l |
| 6 Feb 2025, 10:41 | 0.023 | 0.023 mg/l |
| 3 Jan 2025, 12:54 | <0.01 | below 0.01 mg/l (not detected above this) |
| 10 Dec 2024, 11:42 | 0.013 | 0.013 mg/l |
| 26 Nov 2024, 12:41 | 0.021 | 0.021 mg/l |
| 14 Oct 2024, 11:31 | 0.055 | 0.055 mg/l |
| 13 Sep 2024, 10:31 | 0.042 | 0.042 mg/l |
| 8 Aug 2024, 10:58 | 0.27 | 0.27 mg/l |
| 2 Jul 2024, 11:54 | 0.34 | 0.34 mg/l |
| 7 Jun 2024, 10:44 | 0.21 | 0.21 mg/l |
| 25 Mar 2024, 15:17 | 0.027 | 0.027 mg/l |
| 19 Feb 2024, 12:57 | 0.032 | 0.032 mg/l |
| 12 Jan 2024, 11:26 | 0.038 | 0.038 mg/l |
| 7 Dec 2023, 10:56 | 0.023 | 0.023 mg/l |
| 16 Nov 2023, 10:20 | 0.037 | 0.037 mg/l |
| 13 Oct 2023, 10:45 | 0.028 | 0.028 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
303 µS/cm
Sampled 2 Sep 2026, 29 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Sep 2026, 13:29 | 303 | 303 µS/cm |
| 19 Aug 2026, 11:34 | 559 | 559 µS/cm |
| 3 Jul 2026, 12:13 | 179 | 179 µS/cm |
| 8 Jun 2026, 10:25 | 154 | 154 µS/cm |
| 5 May 2026, 12:41 | 143 | 143 µS/cm |
| 20 Apr 2026, 09:56 | 128 | 128 µS/cm |
| 6 Mar 2025, 11:40 | 128 | 128 µS/cm |
| 6 Feb 2025, 10:41 | 121 | 121 µS/cm |
| 3 Jan 2025, 12:54 | 131 | 131 µS/cm |
| 10 Dec 2024, 11:42 | 123 | 123 µS/cm |
| 26 Nov 2024, 12:41 | 115 | 115 µS/cm |
| 14 Oct 2024, 11:31 | 112 | 112 µS/cm |
| 13 Sep 2024, 10:31 | 145 | 145 µS/cm |
| 8 Aug 2024, 10:58 | 176 | 176 µS/cm |
| 2 Jul 2024, 11:54 | 189 | 189 µS/cm |
| 7 Jun 2024, 10:44 | 152 | 152 µS/cm |
| 25 Mar 2024, 15:17 | 102 | 102 µS/cm |
| 19 Feb 2024, 12:57 | 115 | 115 µS/cm |
| 12 Jan 2024, 11:26 | 127 | 127 µS/cm |
| 7 Dec 2023, 10:56 | 122 | 122 µS/cm |
| 16 Nov 2023, 10:20 | 160 | 160 µS/cm |
| 13 Oct 2023, 10:45 | 129 | 129 µS/cm |
Everything measured here
59 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 59 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 22 | Oct 2023 – Sep 2026 | 83.1% 2 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | Oct 2023 – Sep 2026 | 8.11 mg/l 2 Sep 2026 |
| Temperature of Water 0076 | River water | 22 | Oct 2023 – Sep 2026 | 16.4 °C 2 Sep 2026 |
| pH 0061 | River water | 22 | Oct 2023 – Sep 2026 | 7.13 2 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 22 | Oct 2023 – Sep 2026 | 0.097 mg/l 2 Sep 2026 |
| Nitrate as N 0117 | River water | 22 | Oct 2023 – Sep 2026 | 2.35 mg/l 2 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 22 | Oct 2023 – Sep 2026 | 0.3 mg/l 2 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 22 | Oct 2023 – Sep 2026 | 303 µS/cm 2 Sep 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 7 Jun 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 7 Jun 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 7 Jun 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 7 Jun 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 7 Jun 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Jun 2024 – Jun 2024 | below 0.004 µg/l 7 Jun 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Jun 2024 – Jun 2024 | below 0.005 µg/l 7 Jun 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 7 Jun 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 7 Jun 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 21 | Oct 2023 – Sep 2026 | 33 mg/l 2 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Oct 2023 – Sep 2026 | 0.00039 mg/l 2 Sep 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 7 Jun 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 7 Jun 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 7 Jun 2024 |
| Nitrite as N 0118 | River water | 22 | Oct 2023 – Sep 2026 | 0.047 mg/l 2 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 22 | Oct 2023 – Sep 2026 | 2.4 mg/l 2 Sep 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 7 Jun 2024 |
| Perfluorobutanoic acid 2995 | River water | 1 | Jun 2024 – Jun 2024 | 0.0012 µg/l 7 Jun 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 7 Jun 2024 |
| Perfluorodecanoic acid 8892 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 7 Jun 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Jun 2024 – Jun 2024 | below 0.005 µg/l 7 Jun 2024 |
| Perfluorododecanoic acid 8894 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 7 Jun 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 7 Jun 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Perfluorohexanoic acid 8888 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Perfluorononanoic acid 8891 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 7 Jun 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 7 Jun 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 7 Jun 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Perfluorooctanoate anion 9274 | River water | 6 | Oct 2023 – Mar 2024 | below 0.0006 µg/l 25 Mar 2024 |
| Perfluorooctanoic acid 8890 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Perfluorooctylsulphonate anion 9276 | River water | 6 | Oct 2023 – Mar 2024 | 0.00018 µg/l 25 Mar 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Jun 2024 – Jun 2024 | below 0.0005 µg/l 7 Jun 2024 |
| Perfluoropentanoic acid 8887 | River water | 1 | Jun 2024 – Jun 2024 | below 0.001 µg/l 7 Jun 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Jun 2024 – Jun 2024 | below 0.006 µg/l 7 Jun 2024 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Jun 2024 – Jun 2024 | below 0.005 µg/l 7 Jun 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Jun 2024 – Jun 2024 | below 0.004 µg/l 7 Jun 2024 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Jun 2024 – Jun 2024 | below 0.002 µg/l 7 Jun 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.