North Heath Copse Horsham
EA name: SSN0250 NORTH HEATH COPSE HORSHAM
Environment Agency sampling point SO-SSN0250 · 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 Jul 2026, 10:293 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 19 since 7 Jan 2025 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 517825, 133031As 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
- Holbrook GillPlaced by position alone, on a line whose map name differs from its own, 17 m from the line.
- Next gauge downstream
- Alfoldean On the River Arun · 13 km along the river
- Why it was sampled
- Monitoring (national agency policy) (19 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
48.8%
Sampled 2 Jul 2026, 3 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jul 2026, 10:29 | 48.8 | 48.8% |
| 4 Jun 2026, 10:55 | 83 | 83% |
| 14 May 2026, 12:44 | 85 | 85% |
| 9 Apr 2026, 13:11 | 81.3 | 81.3% |
| 5 Feb 2026, 11:39 | 97.6 | 97.6% |
| 7 Jan 2026, 14:25 | 91.2 | 91.2% |
| 2 Dec 2025, 12:41 | 92.2 | 92.2% |
| 5 Nov 2025, 11:35 | 74.3 | 74.3% |
| 20 Oct 2025, 09:50 | 83.8 | 83.8% |
| 2 Sep 2025, 11:49 | 86.8 | 86.8% |
| 4 Aug 2025, 10:52 | 63.1 | 63.1% |
| 22 Jul 2025, 13:14 | 88.9 | 88.9% |
| 2 Jun 2025, 13:53 | 61.2 | 61.2% |
| 1 May 2025, 12:27 | 94 | 94% |
| 9 Apr 2025, 12:46 | 83 | 83% |
| 21 Mar 2025, 10:26 | 91.8 | 91.8% |
| 3 Feb 2025, 12:16 | 95.2 | 95.2% |
| 7 Jan 2025, 12:48 | 95.9 | 95.9% |
Dissolved oxygen
as O2 · code 9924 · mg/l
4.76 mg/l
Sampled 2 Jul 2026, 3 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jul 2026, 10:29 | 4.76 | 4.76 mg/l |
| 4 Jun 2026, 10:55 | 8.4 | 8.4 mg/l |
| 14 May 2026, 12:44 | 9.5 | 9.5 mg/l |
| 9 Apr 2026, 13:11 | 8.78 | 8.78 mg/l |
| 5 Feb 2026, 11:39 | 11.7 | 11.7 mg/l |
| 7 Jan 2026, 14:25 | 12 | 12 mg/l |
| 2 Dec 2025, 12:41 | 10.6 | 10.6 mg/l |
| 5 Nov 2025, 11:35 | 7.82 | 7.82 mg/l |
| 20 Oct 2025, 09:50 | 8.69 | 8.69 mg/l |
| 2 Sep 2025, 11:49 | 8.61 | 8.61 mg/l |
| 4 Aug 2025, 10:52 | 6.25 | 6.25 mg/l |
| 22 Jul 2025, 13:14 | 8 | 8 mg/l |
| 2 Jun 2025, 13:53 | 6.3 | 6.3 mg/l |
| 1 May 2025, 12:27 | 9.77 | 9.77 mg/l |
| 9 Apr 2025, 12:46 | 9.55 | 9.55 mg/l |
| 21 Mar 2025, 10:26 | 10.3 | 10.3 mg/l |
| 3 Feb 2025, 12:16 | 12.1 | 12.1 mg/l |
| 7 Jan 2025, 12:48 | 11.8 | 11.8 mg/l |
Water temperature
code 0076 · °C
16.4 °C
Sampled 2 Jul 2026, 3 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jul 2026, 10:29 | 16.4 | 16.4 °C |
| 4 Jun 2026, 10:55 | 14.7 | 14.7 °C |
| 14 May 2026, 12:44 | 10.3 | 10.3 °C |
| 9 Apr 2026, 13:11 | 11.8 | 11.8 °C |
| 5 Feb 2026, 11:39 | 7.6 | 7.6 °C |
| 7 Jan 2026, 14:25 | 3.9 | 3.9 °C |
| 2 Dec 2025, 12:41 | 9 | 9 °C |
| 5 Nov 2025, 11:35 | 12.9 | 12.9 °C |
| 20 Oct 2025, 09:50 | 13.6 | 13.6 °C |
| 2 Sep 2025, 11:49 | 15.6 | 15.6 °C |
| 4 Aug 2025, 10:52 | 15.7 | 15.7 °C |
| 22 Jul 2025, 13:14 | 20.4 | 20.4 °C |
| 2 Jun 2025, 13:53 | 13.9 | 13.9 °C |
| 1 May 2025, 12:27 | 13.5 | 13.5 °C |
| 9 Apr 2025, 12:46 | 9.1 | 9.1 °C |
| 21 Mar 2025, 10:26 | 10 | 10 °C |
| 3 Feb 2025, 12:16 | 5 | 5 °C |
| 7 Jan 2025, 12:48 | 6.3 | 6.3 °C |
pH
code 0061
7.37
Sampled 2 Jul 2026, 3 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jul 2026, 10:29 | 7.37 | 7.37 |
| 4 Jun 2026, 10:55 | 7.65 | 7.65 |
| 14 May 2026, 12:44 | 7.61 | 7.61 |
| 9 Apr 2026, 13:11 | 7.58 | 7.58 |
| 5 Feb 2026, 11:39 | 7.47 | 7.47 |
| 7 Jan 2026, 14:25 | 7.5 | 7.5 |
| 2 Dec 2025, 12:41 | 7.58 | 7.58 |
| 5 Nov 2025, 11:35 | 7.39 | 7.39 |
| 20 Oct 2025, 09:50 | 7.63 | 7.63 |
| 2 Sep 2025, 11:49 | 7.63 | 7.63 |
| 4 Aug 2025, 10:52 | 7.57 | 7.57 |
| 22 Jul 2025, 13:14 | 7.57 | 7.57 |
| 2 Jun 2025, 13:53 | 7.59 | 7.59 |
| 1 May 2025, 12:27 | 7.76 | 7.76 |
| 9 Apr 2025, 12:46 | 7.64 | 7.64 |
| 21 Mar 2025, 10:26 | 7.66 | 7.66 |
| 3 Feb 2025, 12:16 | 7.65 | 7.65 |
| 7 Jan 2025, 12:48 | 7.54 | 7.54 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.43 mg/l
Sampled 2 Jul 2026, 3 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jul 2026, 10:29 | 0.43 | 0.43 mg/l |
| 4 Jun 2026, 10:55 | 0.078 | 0.078 mg/l |
| 14 May 2026, 12:44 | 0.066 | 0.066 mg/l |
| 9 Apr 2026, 13:11 | 0.1 | 0.1 mg/l |
| 5 Feb 2026, 11:39 | 0.069 | 0.069 mg/l |
| 7 Jan 2026, 14:25 | 0.5 | 0.5 mg/l |
| 2 Dec 2025, 12:41 | 0.11 | 0.11 mg/l |
| 5 Nov 2025, 11:35 | 0.041 | 0.041 mg/l |
| 20 Oct 2025, 09:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Sep 2025, 11:49 | 0.045 | 0.045 mg/l |
| 4 Aug 2025, 10:52 | 0.17 | 0.17 mg/l |
| 22 Jul 2025, 13:14 | 0.12 | 0.12 mg/l |
| 2 Jun 2025, 13:53 | 0.3 | 0.3 mg/l |
| 1 May 2025, 12:27 | 0.074 | 0.074 mg/l |
| 9 Apr 2025, 12:46 | 0.12 | 0.12 mg/l |
| 21 Mar 2025, 10:26 | 0.042 | 0.042 mg/l |
| 3 Feb 2025, 12:16 | 0.04 | 0.04 mg/l |
| 7 Jan 2025, 12:48 | 0.042 | 0.042 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.534 mg/l
Sampled 2 Jul 2026, 3 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jul 2026, 10:29 | 0.534 | 0.534 mg/l |
| 4 Jun 2026, 10:55 | 0.425 | 0.425 mg/l |
| 14 May 2026, 12:44 | 2.17 | 2.17 mg/l |
| 9 Apr 2026, 13:11 | 0.484 | 0.484 mg/l |
| 5 Feb 2026, 11:39 | 0.844 | 0.844 mg/l |
| 7 Jan 2026, 14:25 | 0.937 | 0.937 mg/l |
| 2 Dec 2025, 12:41 | 1.18 | 1.18 mg/l |
| 5 Nov 2025, 11:35 | 1.06 | 1.06 mg/l |
| 20 Oct 2025, 09:50 | 0.711 | 0.711 mg/l |
| 2 Sep 2025, 11:49 | 0.728 | 0.728 mg/l |
| 4 Aug 2025, 10:52 | 0.327 | 0.327 mg/l |
| 22 Jul 2025, 13:14 | 0.376 | 0.376 mg/l |
| 2 Jun 2025, 13:53 | 0.382 | 0.382 mg/l |
| 1 May 2025, 12:27 | 3.99 | 3.99 mg/l |
| 9 Apr 2025, 12:46 | 0.419 | 0.419 mg/l |
| 21 Mar 2025, 10:26 | 0.335 | 0.335 mg/l |
| 3 Feb 2025, 12:16 | 1.39 | 1.39 mg/l |
| 7 Jan 2025, 12:48 | 1.98 | 1.98 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.81 mg/l
Sampled 2 Jul 2026, 3 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jul 2026, 10:29 | 0.81 | 0.81 mg/l |
| 4 Jun 2026, 10:55 | 0.13 | 0.13 mg/l |
| 14 May 2026, 12:44 | 0.36 | 0.36 mg/l |
| 9 Apr 2026, 13:11 | 0.2 | 0.2 mg/l |
| 5 Feb 2026, 11:39 | 0.089 | 0.089 mg/l |
| 7 Jan 2026, 14:25 | 0.17 | 0.17 mg/l |
| 2 Dec 2025, 12:41 | 0.13 | 0.13 mg/l |
| 5 Nov 2025, 11:35 | 0.1 | 0.1 mg/l |
| 20 Oct 2025, 09:50 | 0.13 | 0.13 mg/l |
| 2 Sep 2025, 11:49 | 0.13 | 0.13 mg/l |
| 4 Aug 2025, 10:52 | 0.5 | 0.5 mg/l |
| 22 Jul 2025, 13:14 | 0.075 | 0.075 mg/l |
| 2 Jun 2025, 13:53 | 0.59 | 0.59 mg/l |
| 1 May 2025, 12:27 | 0.44 | 0.44 mg/l |
| 9 Apr 2025, 12:46 | 0.16 | 0.16 mg/l |
| 21 Mar 2025, 10:26 | 0.11 | 0.11 mg/l |
| 3 Feb 2025, 12:16 | 0.086 | 0.086 mg/l |
| 7 Jan 2025, 12:48 | 0.1 | 0.1 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
474 µS/cm
Sampled 2 Jul 2026, 3 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Jul 2026, 10:29 | 474 | 474 µS/cm |
| 4 Jun 2026, 10:55 | 323 | 323 µS/cm |
| 14 May 2026, 12:44 | 520 | 520 µS/cm |
| 9 Apr 2026, 13:11 | 519 | 519 µS/cm |
| 5 Feb 2026, 11:39 | 341 | 341 µS/cm |
| 7 Jan 2026, 14:25 | 687 | 687 µS/cm |
| 2 Dec 2025, 12:41 | 521 | 521 µS/cm |
| 5 Nov 2025, 11:35 | 629 | 629 µS/cm |
| 20 Oct 2025, 09:50 | 422 | 422 µS/cm |
| 2 Sep 2025, 11:49 | 443 | 443 µS/cm |
| 4 Aug 2025, 10:52 | 528 | 528 µS/cm |
| 22 Jul 2025, 13:14 | 91 | 91 µS/cm |
| 2 Jun 2025, 13:53 | 493 | 493 µS/cm |
| 1 May 2025, 12:27 | 472 | 472 µS/cm |
| 9 Apr 2025, 12:46 | 524 | 524 µS/cm |
| 21 Mar 2025, 10:26 | 513 | 513 µS/cm |
| 3 Feb 2025, 12:16 | 425 | 425 µS/cm |
| 7 Jan 2025, 12:48 | 398 | 398 µS/cm |
Everything measured here
96 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 96 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 18 | Jan 2025 – Jul 2026 | 48.8% 2 Jul 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 18 | Jan 2025 – Jul 2026 | 4.76 mg/l 2 Jul 2026 |
| Temperature of Water 0076 | River water | 18 | Jan 2025 – Jul 2026 | 16.4 °C 2 Jul 2026 |
| pH 0061 | River water | 18 | Jan 2025 – Jul 2026 | 7.37 2 Jul 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 18 | Jan 2025 – Jul 2026 | 0.43 mg/l 2 Jul 2026 |
| Nitrate as N 0117 | River water | 18 | Jan 2025 – Jul 2026 | 0.534 mg/l 2 Jul 2026 |
| Orthophosphate, reactive as P 0180 | River water | 18 | Jan 2025 – Jul 2026 | 0.81 mg/l 2 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 18 | Jan 2025 – Jul 2026 | 474 µS/cm 2 Jul 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 2 Sep 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 2 Sep 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 2 Sep 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 2 Sep 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 2 Sep 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 2 Sep 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 2 Sep 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Sep 2025 – Sep 2025 | below 0.004 µg/l 2 Sep 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 2 Sep 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 2 Sep 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Sep 2025 – Sep 2025 | 0.017 µg/l 2 Sep 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 2 Sep 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 2 Sep 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 18 | Jan 2025 – Jul 2026 | 180 mg/l 2 Jul 2026 |
| Aluminium, Dissolved 6037 | River water | 8 | Apr 2025 – Jul 2026 | 21 µg/l 2 Jul 2026 |
| Aminomethylphosphonic acid 7125 | River water | 14 | Apr 2025 – Jul 2026 | 1.1 µg/l 2 Jul 2026 |
| Ammonia un-ionised as N 0119 | River water | 18 | Jan 2025 – Jul 2026 | 0.003 mg/l 2 Jul 2026 |
| Barium, Dissolved 9446 | River water | 8 | Apr 2025 – Jul 2026 | 24 µg/l 2 Jul 2026 |
| Boron, Dissolved 9447 | River water | 8 | Apr 2025 – Jul 2026 | 170 µg/l 2 Jul 2026 |
| Cadmium, Dissolved 0106 | River water | 8 | Apr 2025 – Jul 2026 | below 0.01 µg/l 2 Jul 2026 |
| Calcium, Dissolved 0239 | River water | 8 | Apr 2025 – Jul 2026 | 27 mg/l 2 Jul 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 18 | Jan 2025 – Jul 2026 | 4 mg/l 2 Jul 2026 |
| Chloride 0172 | River water | 18 | Jan 2025 – Jul 2026 | 39 mg/l 2 Jul 2026 |
| Chromium, Dissolved 3409 | River water | 8 | Apr 2025 – Jul 2026 | below 0.5 µg/l 2 Jul 2026 |
| Copper : BLM Bioavailable 4821 | River water | 8 | Apr 2025 – Jul 2026 | 0.03 µg/l 2 Jul 2026 |
| Copper, Dissolved 6450 | River water | 8 | Apr 2025 – Jul 2026 | 0.51 µg/l 2 Jul 2026 |
| eDNA Report 3047 | River water | 1 | Jan 2025 – Jan 2025 | 1 text result 7 Jan 2025 |
| Flow Type 2896 | River water | 17 | Jan 2025 – Jul 2026 | Moderate Flow 2 Jul 2026 |
| Glyphosate 3007 | River water | 14 | Apr 2025 – Jul 2026 | 0.2 µg/l 2 Jul 2026 |
| Hardness, Calcium 0163 | River water | 8 | Apr 2025 – Jul 2026 | 67.4 mg/l 2 Jul 2026 |
| Hardness, Total as CaCO3 0158 | River water | 8 | Apr 2025 – Jul 2026 | 81 mg/l 2 Jul 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 2 Sep 2025 |
| Iron, Dissolved 6460 | River water | 8 | Apr 2025 – Jul 2026 | 350 µg/l 2 Jul 2026 |
| LCMS Screen : Semi Quantitative 7299 | River water | 9 | Jul 2025 – Jul 2026 | 1 text result 2 Jul 2026 |
| Lead : BLM Bioavailable 3377 | River water | 8 | Apr 2025 – Jul 2026 | 0.03 µg/l 2 Jul 2026 |
| Lead, Dissolved 0052 | River water | 8 | Apr 2025 – Jul 2026 | 0.12 µg/l 2 Jul 2026 |
| Lithium, Dissolved 4201 | River water | 8 | Apr 2025 – Jul 2026 | below 100 µg/l 2 Jul 2026 |
| Magnesium, Dissolved 0235 | River water | 8 | Apr 2025 – Jul 2026 | 3.3 mg/l 2 Jul 2026 |
| Manganese : BLM Bioavailable 4820 | River water | 8 | Apr 2025 – Jul 2026 | 64 µg/l 2 Jul 2026 |
| Manganese, Dissolved 6458 | River water | 8 | Apr 2025 – Jul 2026 | 220 µg/l 2 Jul 2026 |
| Mitochondrial marker : Fish 12S 2857 | River water | 1 | Jan 2025 – Jan 2025 | Present 7 Jan 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Sep 2025 – Sep 2025 | below 0.002 µg/l 2 Sep 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Sep 2025 – Sep 2025 | below 0.002 µg/l 2 Sep 2025 |
| Nickel : BLM Bioavailable 3878 | River water | 8 | Apr 2025 – Jul 2026 | 0.28 µg/l 2 Jul 2026 |
| Nickel, Dissolved 3410 | River water | 8 | Apr 2025 – Jul 2026 | 0.78 µg/l 2 Jul 2026 |
| Nitrite as N 0118 | River water | 18 | Jan 2025 – Jul 2026 | 0.096 mg/l 2 Jul 2026 |
| Nitrogen, Total as N 9686 | River water | 18 | Jan 2025 – Jul 2026 | 1.7 mg/l 2 Jul 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 18 | Jan 2025 – Jul 2026 | 0.63 mg/l 2 Jul 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 2 Sep 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 2 Sep 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 2 Sep 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 2 Sep 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 2 Sep 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Sep 2025 – Sep 2025 | 0.0052 µg/l 2 Sep 2025 |
| Perfluorobutanoic acid 2995 | River water | 1 | Sep 2025 – Sep 2025 | 0.011 µg/l 2 Sep 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Sep 2025 – Sep 2025 | 0.002 µg/l 2 Sep 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 2 Sep 2025 |
| Perfluorodecanoic acid 8892 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 2 Sep 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Sep 2025 – Sep 2025 | below 0.005 µg/l 2 Sep 2025 |
| Perfluorododecanoic acid 8894 | River water | 1 | Sep 2025 – Sep 2025 | below 0.002 µg/l 2 Sep 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 2 Sep 2025 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Sep 2025 – Sep 2025 | 0.0048 µg/l 2 Sep 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 2 Sep 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 2 Sep 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Sep 2025 – Sep 2025 | 0.0013 µg/l 2 Sep 2025 |
| Perfluorohexanoic acid 8888 | River water | 1 | Sep 2025 – Sep 2025 | 0.0088 µg/l 2 Sep 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 2 Sep 2025 |
| Perfluorononanoic acid 8891 | River water | 1 | Sep 2025 – Sep 2025 | 0.0013 µg/l 2 Sep 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | Sep 2025 – Sep 2025 | below 0.002 µg/l 2 Sep 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 2 Sep 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Sep 2025 – Sep 2025 | 0.0024 µg/l 2 Sep 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Sep 2025 – Sep 2025 | 0.0028 µg/l 2 Sep 2025 |
| Perfluorooctanoic acid 8890 | River water | 1 | Sep 2025 – Sep 2025 | 0.0081 µg/l 2 Sep 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 2 Sep 2025 |
| Perfluoropentanoic acid 8887 | River water | 1 | Sep 2025 – Sep 2025 | 0.012 µg/l 2 Sep 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Sep 2025 – Sep 2025 | below 0.006 µg/l 2 Sep 2025 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Sep 2025 – Sep 2025 | below 0.002 µg/l 2 Sep 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Sep 2025 – Sep 2025 | below 0.004 µg/l 2 Sep 2025 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 2 Sep 2025 |
| Phosphorus, Total as P 0348 | River water | 18 | Jan 2025 – Jul 2026 | 0.8 mg/l 2 Jul 2026 |
| Potassium, Dissolved 0209 | River water | 8 | Apr 2025 – Jul 2026 | 3.1 mg/l 2 Jul 2026 |
| Silica, reactive as SiO2 0182 | River water | 18 | Jan 2025 – Jul 2026 | 9.4 mg/l 2 Jul 2026 |
| Sodium, Dissolved 0205 | River water | 8 | Apr 2025 – Jul 2026 | 71 mg/l 2 Jul 2026 |
| Solids, Suspended at 105 C 0135 | River water | 18 | Jan 2025 – Jul 2026 | 9.8 mg/l 2 Jul 2026 |
| Strontium, Filtered 6693 | River water | 8 | Apr 2025 – Jul 2026 | 150 µg/l 2 Jul 2026 |
| Sulphate, Dissolved as SO4 7859 | River water | 8 | Apr 2025 – Jul 2026 | 15 mg/l 2 Jul 2026 |
| Zinc : BLM Bioavailable 4822 | River water | 8 | Apr 2025 – Jul 2026 | 0.59 µg/l 2 Jul 2026 |
| Zinc, Dissolved 3408 | River water | 8 | Apr 2025 – Jul 2026 | 1.2 µg/l 2 Jul 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.