Gawler Bottom
EA name: SSN0264 GAWLER BOTTOM
Environment Agency sampling point SW-SSN0264 · 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
- 13 Aug 2026, 12:5349 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 20 since 3 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 264050, 78448As 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) (20 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
93.5%
Sampled 13 Aug 2026, 49 days ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Aug 2026, 12:53 | 93.5 | 93.5% |
| 2 Jul 2026, 14:04 | 95.7 | 95.7% |
| 8 Jun 2026, 11:21 | 94.6 | 94.6% |
| 11 May 2026, 12:45 | 95.6 | 95.6% |
| 13 Apr 2026, 13:15 | 92.8 | 92.8% |
| 3 Mar 2026, 10:43 | 88.6 | 88.6% |
| 4 Feb 2026, 09:52 | 91.2 | 91.2% |
| 19 Jan 2026, 13:27 | 91.3 | 91.3% |
| 5 Dec 2025, 13:03 | 92.4 | 92.4% |
| 10 Nov 2025, 09:02 | 86.8 | 86.8% |
| 3 Sep 2025, 10:52 | 77.4 | 77.4% |
| 5 Aug 2025, 11:26 | 91.8 | 91.8% |
| 11 Jul 2025, 11:00 | 92.2 | 92.2% |
| 4 Jun 2025, 11:20 | 99.7 | 99.7% |
| 6 May 2025, 11:23 | 103.8 | 103.8% |
| 4 Apr 2025, 09:48 | 89 | 89% |
| 7 Mar 2025, 14:44 | 86.9 | 86.9% |
| 4 Feb 2025, 12:35 | 89 | 89% |
| 15 Jan 2025, 11:46 | 89.5 | 89.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.92 mg/l
Sampled 13 Aug 2026, 49 days ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Aug 2026, 12:53 | 9.92 | 9.92 mg/l |
| 2 Jul 2026, 14:04 | 10 | 10 mg/l |
| 8 Jun 2026, 11:21 | 10.3 | 10.3 mg/l |
| 11 May 2026, 12:45 | 10.7 | 10.7 mg/l |
| 13 Apr 2026, 13:15 | 10.1 | 10.1 mg/l |
| 3 Mar 2026, 10:43 | 10.2 | 10.2 mg/l |
| 4 Feb 2026, 09:52 | 10.9 | 10.9 mg/l |
| 19 Jan 2026, 13:27 | 10.9 | 10.9 mg/l |
| 5 Dec 2025, 13:03 | 11.1 | 11.1 mg/l |
| 10 Nov 2025, 09:02 | 9.73 | 9.73 mg/l |
| 3 Sep 2025, 10:52 | 8.01 | 8.01 mg/l |
| 5 Aug 2025, 11:26 | 9.94 | 9.94 mg/l |
| 11 Jul 2025, 11:00 | 9.89 | 9.89 mg/l |
| 4 Jun 2025, 11:20 | 11 | 11 mg/l |
| 6 May 2025, 11:23 | 11.8 | 11.8 mg/l |
| 4 Apr 2025, 09:48 | 10.3 | 10.3 mg/l |
| 7 Mar 2025, 14:44 | 10.3 | 10.3 mg/l |
| 4 Feb 2025, 12:35 | 10.6 | 10.6 mg/l |
| 15 Jan 2025, 11:46 | 10.8 | 10.8 mg/l |
Water temperature
code 0076 · °C
12.6 °C
Sampled 13 Aug 2026, 49 days ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Aug 2026, 12:53 | 12.6 | 12.6 °C |
| 2 Jul 2026, 14:04 | 13.1 | 13.1 °C |
| 8 Jun 2026, 11:21 | 11.6 | 11.6 °C |
| 11 May 2026, 12:45 | 10.2 | 10.2 °C |
| 13 Apr 2026, 13:15 | 11.4 | 11.4 °C |
| 3 Mar 2026, 10:43 | 9.1 | 9.1 °C |
| 4 Feb 2026, 09:52 | 7.6 | 7.6 °C |
| 19 Jan 2026, 13:27 | 7.6 | 7.6 °C |
| 5 Dec 2025, 13:03 | 7.2 | 7.2 °C |
| 10 Nov 2025, 09:02 | 10.2 | 10.2 °C |
| 3 Sep 2025, 10:52 | 13.7 | 13.7 °C |
| 5 Aug 2025, 11:26 | 11.7 | 11.7 °C |
| 11 Jul 2025, 11:00 | 12.1 | 12.1 °C |
| 4 Jun 2025, 11:20 | 10.8 | 10.8 °C |
| 6 May 2025, 11:23 | 9.8 | 9.8 °C |
| 4 Apr 2025, 09:48 | 8.8 | 8.8 °C |
| 7 Mar 2025, 14:44 | 7.9 | 7.9 °C |
| 4 Feb 2025, 12:35 | 7.7 | 7.7 °C |
| 15 Jan 2025, 11:46 | 7 | 7 °C |
pH
code 0061
5.37
Sampled 13 Aug 2026, 49 days ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Aug 2026, 12:53 | 5.37 | 5.37 |
| 2 Jul 2026, 14:04 | 5.44 | 5.44 |
| 8 Jun 2026, 11:21 | 5.35 | 5.35 |
| 11 May 2026, 12:45 | 5.89 | 5.89 |
| 13 Apr 2026, 13:15 | 5.6 | 5.6 |
| 3 Mar 2026, 10:43 | 5.11 | 5.11 |
| 4 Feb 2026, 09:52 | 5.04 | 5.04 |
| 19 Jan 2026, 13:27 | 5.38 | 5.38 |
| 5 Dec 2025, 13:03 | 5.16 | 5.16 |
| 10 Nov 2025, 09:02 | 5.28 | 5.28 |
| 3 Sep 2025, 10:52 | 5.43 | 5.43 |
| 5 Aug 2025, 11:26 | 5.64 | 5.64 |
| 11 Jul 2025, 11:00 | 5.58 | 5.58 |
| 4 Jun 2025, 11:20 | 5.74 | 5.74 |
| 6 May 2025, 11:23 | 5.89 | 5.89 |
| 4 Apr 2025, 09:48 | 5.42 | 5.42 |
| 7 Mar 2025, 14:44 | 5.39 | 5.39 |
| 4 Feb 2025, 12:35 | 5.35 | 5.35 |
| 15 Jan 2025, 11:46 | 5.28 | 5.28 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.018 mg/l
Sampled 13 Aug 2026, 49 days ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Aug 2026, 12:53 | 0.018 | 0.018 mg/l |
| 2 Jul 2026, 14:04 | 0.0021 | 0.0021 mg/l |
| 8 Jun 2026, 11:21 | <0.002 | below 0.002 mg/l (not detected above this) |
| 11 May 2026, 12:45 | <0.002 | below 0.002 mg/l (not detected above this) |
| 13 Apr 2026, 13:15 | <0.002 | below 0.002 mg/l (not detected above this) |
| 3 Mar 2026, 10:43 | 0.002 | 0.002 mg/l |
| 4 Feb 2026, 09:52 | <0.002 | below 0.002 mg/l (not detected above this) |
| 19 Jan 2026, 13:27 | <0.002 | below 0.002 mg/l (not detected above this) |
| 5 Dec 2025, 13:03 | 0.0036 | 0.0036 mg/l |
| 10 Nov 2025, 09:02 | 0.019 | 0.019 mg/l |
| 3 Sep 2025, 10:52 | 0.0039 | 0.0039 mg/l |
| 5 Aug 2025, 11:26 | 0.0047 | 0.0047 mg/l |
| 11 Jul 2025, 11:00 | <0.002 | below 0.002 mg/l (not detected above this) |
| 4 Jun 2025, 11:20 | <0.002 | below 0.002 mg/l (not detected above this) |
| 6 May 2025, 11:23 | 0.0033 | 0.0033 mg/l |
| 4 Apr 2025, 09:48 | <0.002 | below 0.002 mg/l (not detected above this) |
| 7 Mar 2025, 14:44 | <0.002 | below 0.002 mg/l (not detected above this) |
| 4 Feb 2025, 12:35 | <0.002 | below 0.002 mg/l (not detected above this) |
| 15 Jan 2025, 11:46 | <0.002 | below 0.002 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.239 mg/l
Sampled 13 Aug 2026, 49 days ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Aug 2026, 12:53 | 0.239 | 0.239 mg/l |
| 2 Jul 2026, 14:04 | 0.219 | 0.219 mg/l |
| 8 Jun 2026, 11:21 | 0.109 | 0.109 mg/l |
| 11 May 2026, 12:45 | 0.229 | 0.229 mg/l |
| 13 Apr 2026, 13:15 | 0.239 | 0.239 mg/l |
| 3 Mar 2026, 10:43 | 0.219 | 0.219 mg/l |
| 4 Feb 2026, 09:52 | 0.209 | 0.209 mg/l |
| 19 Jan 2026, 13:27 | 0.239 | 0.239 mg/l |
| 5 Dec 2025, 13:03 | 0.169 | 0.169 mg/l |
| 10 Nov 2025, 09:02 | 0.171 | 0.171 mg/l |
| 3 Sep 2025, 10:52 | 0.057 | 0.057 mg/l |
| 5 Aug 2025, 11:26 | 0.199 | 0.199 mg/l |
| 11 Jul 2025, 11:00 | 0.219 | 0.219 mg/l |
| 4 Jun 2025, 11:20 | 0.179 | 0.179 mg/l |
| 6 May 2025, 11:23 | 0.229 | 0.229 mg/l |
| 4 Apr 2025, 09:48 | 0.189 | 0.189 mg/l |
| 7 Mar 2025, 14:44 | 0.219 | 0.219 mg/l |
| 4 Feb 2025, 12:35 | 0.189 | 0.189 mg/l |
| 15 Jan 2025, 11:46 | 0.239 | 0.239 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.012 mg/l
Sampled 13 Aug 2026, 49 days ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Aug 2026, 12:53 | 0.012 | 0.012 mg/l |
| 2 Jul 2026, 14:04 | 0.0035 | 0.0035 mg/l |
| 8 Jun 2026, 11:21 | 0.0044 | 0.0044 mg/l |
| 11 May 2026, 12:45 | 0.0021 | 0.0021 mg/l |
| 13 Apr 2026, 13:15 | 0.0027 | 0.0027 mg/l |
| 3 Mar 2026, 10:43 | 0.0024 | 0.0024 mg/l |
| 4 Feb 2026, 09:52 | 0.0018 | 0.0018 mg/l |
| 19 Jan 2026, 13:27 | 0.0028 | 0.0028 mg/l |
| 5 Dec 2025, 13:03 | 0.0028 | 0.0028 mg/l |
| 10 Nov 2025, 09:02 | 0.01 | 0.01 mg/l |
| 3 Sep 2025, 10:52 | 0.0065 | 0.0065 mg/l |
| 5 Aug 2025, 11:26 | 0.0031 | 0.0031 mg/l |
| 11 Jul 2025, 11:00 | 0.003 | 0.003 mg/l |
| 4 Jun 2025, 11:20 | 0.0029 | 0.0029 mg/l |
| 6 May 2025, 11:23 | 0.0028 | 0.0028 mg/l |
| 4 Apr 2025, 09:48 | 0.0029 | 0.0029 mg/l |
| 7 Mar 2025, 14:44 | 0.0028 | 0.0028 mg/l |
| 4 Feb 2025, 12:35 | 0.003 | 0.003 mg/l |
| 15 Jan 2025, 11:46 | 0.0033 | 0.0033 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
62 µS/cm
Sampled 13 Aug 2026, 49 days ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 13 Aug 2026, 12:53 | 62 | 62 µS/cm |
| 2 Jul 2026, 14:04 | 60 | 60 µS/cm |
| 8 Jun 2026, 11:21 | 49 | 49 µS/cm |
| 11 May 2026, 12:45 | 60 | 60 µS/cm |
| 13 Apr 2026, 13:15 | 45 | 45 µS/cm |
| 3 Mar 2026, 10:43 | 54 | 54 µS/cm |
| 4 Feb 2026, 09:52 | 52 | 52 µS/cm |
| 19 Jan 2026, 13:27 | 57 | 57 µS/cm |
| 5 Dec 2025, 13:03 | 50 | 50 µS/cm |
| 10 Nov 2025, 09:02 | 41 | 41 µS/cm |
| 3 Sep 2025, 10:52 | 64 | 64 µS/cm |
| 5 Aug 2025, 11:26 | 63 | 63 µS/cm |
| 11 Jul 2025, 11:00 | 60 | 60 µS/cm |
| 4 Jun 2025, 11:20 | 59 | 59 µS/cm |
| 6 May 2025, 11:23 | 61 | 61 µS/cm |
| 4 Apr 2025, 09:48 | 62 | 62 µS/cm |
| 7 Mar 2025, 14:44 | 58 | 58 µS/cm |
| 4 Feb 2025, 12:35 | 57 | 57 µS/cm |
| 15 Jan 2025, 11:46 | 57 | 57 µS/cm |
Everything measured here
94 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 94 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 19 | Jan 2025 – Aug 2026 | 93.5% 13 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 19 | Jan 2025 – Aug 2026 | 9.92 mg/l 13 Aug 2026 |
| Temperature of Water 0076 | River water | 19 | Jan 2025 – Aug 2026 | 12.6 °C 13 Aug 2026 |
| pH 0061 | River water | 19 | Jan 2025 – Aug 2026 | 5.37 13 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 19 | Jan 2025 – Aug 2026 | 0.018 mg/l 13 Aug 2026 |
| Nitrate as N 0117 | River water | 19 | Jan 2025 – Aug 2026 | 0.239 mg/l 13 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 19 | Jan 2025 – Aug 2026 | 0.012 mg/l 13 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 19 | Jan 2025 – Aug 2026 | 62 µS/cm 13 Aug 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | May 2025 – May 2025 | below 0.001 µg/l 6 May 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | May 2025 – May 2025 | below 0.001 µg/l 6 May 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | May 2025 – May 2025 | below 0.002 µg/l 6 May 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | May 2025 – May 2025 | below 0.001 µg/l 6 May 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | May 2025 – May 2025 | below 0.004 µg/l 6 May 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | May 2025 – May 2025 | below 0.005 µg/l 6 May 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | May 2025 – May 2025 | 0.001 µg/l 6 May 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | May 2025 – May 2025 | below 0.001 µg/l 6 May 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Alkalinity to pH 4.5 : Grans Plot 7610 | River water | 19 | Jan 2025 – Aug 2026 | 5.6 mg/l 13 Aug 2026 |
| Aluminium, Dissolved 6037 | River water | 8 | Apr 2025 – Aug 2026 | 58 µg/l 13 Aug 2026 |
| Aminomethylphosphonic acid 7125 | River water | 15 | Apr 2025 – Aug 2026 | below 0.1 µg/l 13 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 19 | Jan 2025 – Aug 2026 | below 0.00001 mg/l 13 Aug 2026 |
| Barium, Dissolved 9446 | River water | 8 | Apr 2025 – Aug 2026 | below 10 µg/l 13 Aug 2026 |
| Boron, Dissolved 9447 | River water | 8 | Apr 2025 – Aug 2026 | below 100 µg/l 13 Aug 2026 |
| Cadmium, Dissolved 0106 | River water | 8 | Apr 2025 – Aug 2026 | 0.025 µg/l 13 Aug 2026 |
| Calcium, Dissolved 0239 | River water | 8 | Apr 2025 – Aug 2026 | 1.5 mg/l 13 Aug 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 19 | Jan 2025 – Aug 2026 | 0.83 mg/l 13 Aug 2026 |
| Chromium, Dissolved 3409 | River water | 8 | Apr 2025 – Aug 2026 | below 0.5 µg/l 13 Aug 2026 |
| Copper : BLM Bioavailable 4821 | River water | 8 | Apr 2025 – Aug 2026 | 0.37 µg/l 13 Aug 2026 |
| Copper, Dissolved 6450 | River water | 8 | Apr 2025 – Aug 2026 | 0.5 µg/l 13 Aug 2026 |
| eDNA Report 3047 | River water | 1 | Jan 2025 – Jan 2025 | 1 text result 3 Jan 2025 |
| Flow Type 2896 | River water | 19 | Jan 2025 – Aug 2026 | Moderate Flow 13 Aug 2026 |
| Glyphosate 3007 | River water | 15 | Apr 2025 – Aug 2026 | below 0.1 µg/l 13 Aug 2026 |
| Hardness, Calcium 0163 | River water | 8 | Apr 2025 – Aug 2026 | 3.75 mg/l 13 Aug 2026 |
| Hardness, Total as CaCO3 0158 | River water | 8 | Apr 2025 – Aug 2026 | 8.27 mg/l 13 Aug 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | May 2025 – May 2025 | below 0.001 µg/l 6 May 2025 |
| Iron, Dissolved 6460 | River water | 8 | Apr 2025 – Aug 2026 | 46 µg/l 13 Aug 2026 |
| LCMS Screen : Semi Quantitative 7299 | River water | 3 | Jan 2026 – Jul 2026 | 1 text result 2 Jul 2026 |
| Lead : BLM Bioavailable 3377 | River water | 8 | Apr 2025 – Aug 2026 | 0.05 µg/l 13 Aug 2026 |
| Lead, Dissolved 0052 | River water | 8 | Apr 2025 – Aug 2026 | below 0.1 µg/l 13 Aug 2026 |
| Lithium, Dissolved 4201 | River water | 8 | Apr 2025 – Aug 2026 | below 100 µg/l 13 Aug 2026 |
| Magnesium, Dissolved 0235 | River water | 8 | Apr 2025 – Aug 2026 | 1.1 mg/l 13 Aug 2026 |
| Manganese : BLM Bioavailable 4820 | River water | 8 | Apr 2025 – Aug 2026 | 20 µg/l 13 Aug 2026 |
| Manganese, Dissolved 6458 | River water | 8 | Apr 2025 – Aug 2026 | 20 µg/l 13 Aug 2026 |
| Mitochondrial marker : Fish 12S 2857 | River water | 1 | Jan 2025 – Jan 2025 | Not found 3 Jan 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | May 2025 – May 2025 | below 0.002 µg/l 6 May 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | May 2025 – May 2025 | below 0.002 µg/l 6 May 2025 |
| Nickel : BLM Bioavailable 3878 | River water | 8 | Apr 2025 – Aug 2026 | 0.82 µg/l 13 Aug 2026 |
| Nickel, Dissolved 3410 | River water | 8 | Apr 2025 – Aug 2026 | 2.5 µg/l 13 Aug 2026 |
| Nitrite as N 0118 | River water | 19 | Jan 2025 – Aug 2026 | below 0.001 mg/l 13 Aug 2026 |
| Nitrogen, Total as N 9686 | River water | 19 | Jan 2025 – Aug 2026 | 0.49 mg/l 13 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 19 | Jan 2025 – Aug 2026 | 0.24 mg/l 13 Aug 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | May 2025 – May 2025 | below 0.001 µg/l 6 May 2025 |
| Perfluorobutanoic acid 2995 | River water | 1 | May 2025 – May 2025 | below 0.001 µg/l 6 May 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | May 2025 – May 2025 | below 0.002 µg/l 6 May 2025 |
| Perfluorodecanoic acid 8892 | River water | 1 | May 2025 – May 2025 | below 0.002 µg/l 6 May 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | May 2025 – May 2025 | below 0.005 µg/l 6 May 2025 |
| Perfluorododecanoic acid 8894 | River water | 1 | May 2025 – May 2025 | below 0.002 µg/l 6 May 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluoroheptanoic acid 8889 | River water | 1 | May 2025 – May 2025 | below 0.001 µg/l 6 May 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluorohexanoic acid 8888 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluorononanoic acid 8891 | River water | 1 | May 2025 – May 2025 | below 0.001 µg/l 6 May 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | May 2025 – May 2025 | below 0.002 µg/l 6 May 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | May 2025 – May 2025 | below 0.001 µg/l 6 May 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluorooctanoic acid 8890 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | May 2025 – May 2025 | below 0.0005 µg/l 6 May 2025 |
| Perfluoropentanoic acid 8887 | River water | 1 | May 2025 – May 2025 | below 0.001 µg/l 6 May 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | May 2025 – May 2025 | below 0.006 µg/l 6 May 2025 |
| Perfluorotridecanoic acid 2955 | River water | 1 | May 2025 – May 2025 | below 0.005 µg/l 6 May 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | May 2025 – May 2025 | below 0.004 µg/l 6 May 2025 |
| Perfluoroundecanoic acid 8893 | River water | 1 | May 2025 – May 2025 | below 0.002 µg/l 6 May 2025 |
| Phosphorus, Total as P 0348 | River water | 19 | Jan 2025 – Aug 2026 | 0.026 mg/l 13 Aug 2026 |
| Potassium, Dissolved 0209 | River water | 8 | Apr 2025 – Aug 2026 | 1 mg/l 13 Aug 2026 |
| Silica, reactive as SiO2 0182 | River water | 19 | Jan 2025 – Aug 2026 | 11 mg/l 13 Aug 2026 |
| Sodium, Dissolved 0205 | River water | 8 | Apr 2025 – Aug 2026 | 7.9 mg/l 13 Aug 2026 |
| Solids, Suspended at 105 C 0135 | River water | 19 | Jan 2025 – Aug 2026 | 5.8 mg/l 13 Aug 2026 |
| Strontium, Filtered 6693 | River water | 8 | Apr 2025 – Aug 2026 | below 20 µg/l 13 Aug 2026 |
| Sulphate, Dissolved as SO4 7859 | River water | 8 | Apr 2025 – Aug 2026 | below 10 mg/l 13 Aug 2026 |
| Zinc : BLM Bioavailable 4822 | River water | 8 | Apr 2025 – Aug 2026 | 5.6 µg/l 13 Aug 2026 |
| Zinc, Dissolved 3408 | River water | 8 | Apr 2025 – Aug 2026 | 5.6 µg/l 13 Aug 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.