Thornton Watlass Drain
EA name: SSN0309 THORNTON WATLASS DRAIN (also listed as “SSN0309 THORNTON WATLASS DRAIN TRIB OF BURRILL BECK”)
Environment Agency sampling point NE-SSN0309 · 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
- 17 Sep 2026, 14:3414 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 27 since 2 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) · results completed 19 Sep 2026
- Where
- National Grid 424606, 486363As published, to the nearest 1 m. Open in a map
- River, by its own name
- Burrill Beck
- 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) (27 samples)
Results here were completed a median of 4 days after the sample was taken (2 to 82 days, 18 samples). 14 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
100.1%
Sampled 8 Jul 2026, 3 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Jul 2026, 10:54 | 100.1 | 100.1% |
| 30 Apr 2026, 13:27 | 109.2 | 109.2% |
| 10 Mar 2026, 11:54 | 100.6 | 100.6% |
| 6 Feb 2026, 12:16 | 98.8 | 98.8% |
| 12 Dec 2025, 11:18 | 95.6 | 95.6% |
| 24 Oct 2025, 13:41 | 92.6 | 92.6% |
| 28 Jul 2025, 09:03 | 94.4 | 94.4% |
| 9 Apr 2025, 09:19 | 96.8 | 96.8% |
| 10 Mar 2025, 12:52 | 97.2 | 97.2% |
| 5 Feb 2025, 13:36 | 92.7 | 92.7% |
| 7 Jan 2025, 13:52 | 99.3 | 99.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.75 mg/l
Sampled 8 Jul 2026, 3 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Jul 2026, 10:54 | 9.75 | 9.75 mg/l |
| 30 Apr 2026, 13:27 | 11.6 | 11.6 mg/l |
| 10 Mar 2026, 11:54 | 11.7 | 11.7 mg/l |
| 6 Feb 2026, 12:16 | 12.5 | 12.5 mg/l |
| 12 Dec 2025, 11:18 | 11.3 | 11.3 mg/l |
| 24 Oct 2025, 13:41 | 10.5 | 10.5 mg/l |
| 28 Jul 2025, 09:03 | 9.6 | 9.6 mg/l |
| 9 Apr 2025, 09:19 | 11.8 | 11.8 mg/l |
| 10 Mar 2025, 12:52 | 11.9 | 11.9 mg/l |
| 5 Feb 2025, 13:36 | 11.6 | 11.6 mg/l |
| 7 Jan 2025, 13:52 | 13.3 | 13.3 mg/l |
Water temperature
code 0076 · °C
16.5 °C
Sampled 8 Jul 2026, 3 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Jul 2026, 10:54 | 16.5 | 16.5 °C |
| 30 Apr 2026, 13:27 | 12.7 | 12.7 °C |
| 10 Mar 2026, 11:54 | 8.8 | 8.8 °C |
| 6 Feb 2026, 12:16 | 5.3 | 5.3 °C |
| 12 Dec 2025, 11:18 | 8.1 | 8.1 °C |
| 24 Oct 2025, 13:41 | 9.6 | 9.6 °C |
| 28 Jul 2025, 09:03 | 14.5 | 14.5 °C |
| 9 Apr 2025, 09:19 | 6.7 | 6.7 °C |
| 10 Mar 2025, 12:52 | 6.5 | 6.5 °C |
| 5 Feb 2025, 13:36 | 5.7 | 5.7 °C |
| 7 Jan 2025, 13:52 | 3.1 | 3.1 °C |
pH
code 0061
8.3
Sampled 8 Jul 2026, 3 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Jul 2026, 10:54 | 8.3 | 8.3 |
| 30 Apr 2026, 13:27 | 8.64 | 8.64 |
| 10 Mar 2026, 11:54 | 8.35 | 8.35 |
| 6 Feb 2026, 12:16 | 7.89 | 7.89 |
| 12 Dec 2025, 11:18 | 7.99 | 7.99 |
| 24 Oct 2025, 13:41 | 8.3 | 8.3 |
| 28 Jul 2025, 09:03 | 8.69 | 8.69 |
| 9 Apr 2025, 09:19 | 8.3 | 8.3 |
| 10 Mar 2025, 12:52 | 8.54 | 8.54 |
| 5 Feb 2025, 13:36 | 8.45 | 8.45 |
| 7 Jan 2025, 13:52 | 8.45 | 8.45 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 30 Apr 2026, 5 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 30 Apr 2026, 13:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Mar 2026, 11:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Feb 2026, 12:16 | 0.084 | 0.084 mg/l |
| 12 Dec 2025, 11:18 | 0.033 | 0.033 mg/l |
| 24 Oct 2025, 13:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Jul 2025, 09:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Apr 2025, 09:19 | 0.14 | 0.14 mg/l |
| 10 Mar 2025, 12:52 | 0.64 | 0.64 mg/l |
| 5 Feb 2025, 13:36 | 5.3 | 5.3 mg/l |
| 7 Jan 2025, 13:52 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
6.58 mg/l
Sampled 30 Apr 2026, 5 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 30 Apr 2026, 13:27 | 6.58 | 6.58 mg/l |
| 10 Mar 2026, 11:54 | 3.78 | 3.78 mg/l |
| 6 Feb 2026, 12:16 | 3.89 | 3.89 mg/l |
| 12 Dec 2025, 11:18 | 7.47 | 7.47 mg/l |
| 24 Oct 2025, 13:41 | 5.29 | 5.29 mg/l |
| 28 Jul 2025, 09:03 | 0.886 | 0.886 mg/l |
| 9 Apr 2025, 09:19 | 1.47 | 1.47 mg/l |
| 10 Mar 2025, 12:52 | 3.28 | 3.28 mg/l |
| 5 Feb 2025, 13:36 | 3.95 | 3.95 mg/l |
| 7 Jan 2025, 13:52 | 4.29 | 4.29 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.16 mg/l
Sampled 30 Apr 2026, 5 months ago · 10 results banked
Every result (10)
| Sampled | Result as published | Reads as |
|---|---|---|
| 30 Apr 2026, 13:27 | 0.16 | 0.16 mg/l |
| 10 Mar 2026, 11:54 | 0.035 | 0.035 mg/l |
| 6 Feb 2026, 12:16 | 0.062 | 0.062 mg/l |
| 12 Dec 2025, 11:18 | 0.045 | 0.045 mg/l |
| 24 Oct 2025, 13:41 | 0.084 | 0.084 mg/l |
| 28 Jul 2025, 09:03 | 0.28 | 0.28 mg/l |
| 9 Apr 2025, 09:19 | 0.12 | 0.12 mg/l |
| 10 Mar 2025, 12:52 | 0.26 | 0.26 mg/l |
| 5 Feb 2025, 13:36 | 0.45 | 0.45 mg/l |
| 7 Jan 2025, 13:52 | 0.086 | 0.086 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
337 µS/cm
Sampled 8 Jul 2026, 3 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 Jul 2026, 10:54 | 337 | 337 µS/cm |
| 30 Apr 2026, 13:27 | 660 | 660 µS/cm |
| 10 Mar 2026, 11:54 | 596 | 596 µS/cm |
| 6 Feb 2026, 12:16 | 338 | 338 µS/cm |
| 12 Dec 2025, 11:18 | 506 | 506 µS/cm |
| 24 Oct 2025, 13:41 | 715 | 715 µS/cm |
| 28 Jul 2025, 09:03 | 830 | 830 µS/cm |
| 9 Apr 2025, 09:19 | 615 | 615 µS/cm |
| 10 Mar 2025, 12:52 | 696 | 696 µS/cm |
| 5 Feb 2025, 13:36 | 776 | 776 µS/cm |
| 7 Jan 2025, 13:52 | 449 | 449 µS/cm |
Everything measured here
111 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 111 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 11 | Jan 2025 – Jul 2026 | 100.1% 8 Jul 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 11 | Jan 2025 – Jul 2026 | 9.75 mg/l 8 Jul 2026 |
| Temperature of Water 0076 | River water | 11 | Jan 2025 – Jul 2026 | 16.5 °C 8 Jul 2026 |
| pH 0061 | River water | 11 | Jan 2025 – Jul 2026 | 8.3 8 Jul 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 10 | Jan 2025 – Apr 2026 | below 0.03 mg/l 30 Apr 2026 |
| Nitrate as N 0117 | River water | 10 | Jan 2025 – Apr 2026 | 6.58 mg/l 30 Apr 2026 |
| Orthophosphate, reactive as P 0180 | River water | 10 | Jan 2025 – Apr 2026 | 0.16 mg/l 30 Apr 2026 |
| Conductivity at 25 C 0077 | River water | 11 | Jan 2025 – Jul 2026 | 337 µS/cm 8 Jul 2026 |
| 10:2 Fluorotelomer sulfonic acid 2994 | River water | 1 | Dec 2025 – Dec 2025 | below 0.002 µg/l 12 Dec 2025 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| 2H-Perfluoro-2-decenoic acid 2888 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Jul 2025 – Dec 2025 | below 0.004 µg/l 12 Dec 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| 5:1:2 Fluorotelomer betaine 2887 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| 5:3 Fluorotelomer betaine 2886 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| 6:2 Fluorotelomer phosphate diester 2986 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 12 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 12 Dec 2025 |
| 6:2 Fluorotelomer sulfonamide betaine 2985 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| 6:2/8:2 Fluorotelomer phosphate diester 2884 | River water | 1 | Dec 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| 6:6 Perfluorophosphinic acid 2883 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 12 Dec 2025 |
| 6:8 Perfluorophosphinic acid 2882 | River water | 1 | Dec 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| 8:2 Fluorotelomer phosphate diester 2880 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 12 Dec 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| 8:8 Perfluorophosphinic acid 2879 | River water | 1 | Dec 2025 – Dec 2025 | below 0.01 µg/l 12 Dec 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 10 | Jan 2025 – Apr 2026 | 280 mg/l 30 Apr 2026 |
| Aluminium, Dissolved 6037 | River water | 3 | Apr 2025 – Oct 2025 | below 20 µg/l 24 Oct 2025 |
| Aminomethylphosphonic acid 7125 | River water | 6 | Apr 2025 – Mar 2026 | below 0.1 µg/l 10 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 10 | Jan 2025 – Apr 2026 | below 0.00067 mg/l 30 Apr 2026 |
| Barium, Dissolved 9446 | River water | 3 | Apr 2025 – Oct 2025 | 110 µg/l 24 Oct 2025 |
| Boron, Dissolved 9447 | River water | 3 | Apr 2025 – Oct 2025 | below 100 µg/l 24 Oct 2025 |
| Cadmium, Dissolved 0106 | River water | 3 | Apr 2025 – Oct 2025 | below 0.01 µg/l 24 Oct 2025 |
| Calcium, Dissolved 0239 | River water | 3 | Apr 2025 – Oct 2025 | 99 mg/l 24 Oct 2025 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 10 | Jan 2025 – Apr 2026 | 3.7 mg/l 30 Apr 2026 |
| Chloride 0172 | River water | 10 | Jan 2025 – Apr 2026 | 20 mg/l 30 Apr 2026 |
| Chromium, Dissolved 3409 | River water | 3 | Apr 2025 – Oct 2025 | below 0.5 µg/l 24 Oct 2025 |
| Copper : BLM Bioavailable 4821 | River water | 3 | Apr 2025 – Oct 2025 | 0.17 µg/l 24 Oct 2025 |
| Copper, Dissolved 6450 | River water | 3 | Apr 2025 – Oct 2025 | 2.9 µg/l 24 Oct 2025 |
| eDNA Report 3047 | River water | 1 | Jan 2025 – Jan 2025 | 1 text result 2 Jan 2025 |
| Flow Type 2896 | River water | 19 | Jan 2025 – Sep 2026 | Dry 17 Sep 2026 |
| Glyphosate 3007 | River water | 6 | Apr 2025 – Mar 2026 | below 0.1 µg/l 10 Mar 2026 |
| Hardness, Calcium 0163 | River water | 3 | Apr 2025 – Oct 2025 | 247 mg/l 24 Oct 2025 |
| Hardness, Total as CaCO3 0158 | River water | 3 | Apr 2025 – Oct 2025 | 309 mg/l 24 Oct 2025 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| Hexafluoropropylene oxide trimer acid 2980 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| Iron, Dissolved 6460 | River water | 3 | Apr 2025 – Oct 2025 | below 30 µg/l 24 Oct 2025 |
| Lead : BLM Bioavailable 3377 | River water | 3 | Apr 2025 – Oct 2025 | 0.02 µg/l 24 Oct 2025 |
| Lead, Dissolved 0052 | River water | 3 | Apr 2025 – Oct 2025 | 0.13 µg/l 24 Oct 2025 |
| Lithium, Dissolved 4201 | River water | 3 | Apr 2025 – Oct 2025 | below 100 µg/l 24 Oct 2025 |
| Magnesium, Dissolved 0235 | River water | 3 | Apr 2025 – Oct 2025 | 15 mg/l 24 Oct 2025 |
| Manganese : BLM Bioavailable 4820 | River water | 3 | Apr 2025 – Oct 2025 | 5 µg/l 24 Oct 2025 |
| Manganese, Dissolved 6458 | River water | 3 | Apr 2025 – Oct 2025 | below 10 µg/l 24 Oct 2025 |
| Mitochondrial marker : Fish 12S 2857 | River water | 1 | Jan 2025 – Jan 2025 | Not found 2 Jan 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Jul 2025 – Dec 2025 | below 0.002 µg/l 12 Dec 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Jul 2025 – Dec 2025 | below 0.002 µg/l 12 Dec 2025 |
| Nickel : BLM Bioavailable 3878 | River water | 3 | Apr 2025 – Oct 2025 | 0.73 µg/l 24 Oct 2025 |
| Nickel, Dissolved 3410 | River water | 3 | Apr 2025 – Oct 2025 | 1.8 µg/l 24 Oct 2025 |
| Nitrite as N 0118 | River water | 10 | Jan 2025 – Apr 2026 | 0.018 mg/l 30 Apr 2026 |
| Nitrogen, Total as N 9686 | River water | 10 | Jan 2025 – Apr 2026 | 7.1 mg/l 30 Apr 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 10 | Jan 2025 – Apr 2026 | 6.6 mg/l 30 Apr 2026 |
| No flow /No sample 7668 | River water | 14 | May 2025 – Sep 2026 | No flow/discharge at sampling point 17 Sep 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| Perfluorobutanoic acid 2995 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| Perfluorodecanoic acid 8892 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Jul 2025 – Dec 2025 | below 0.005 µg/l 12 Dec 2025 |
| Perfluorododecanoic acid 8894 | River water | 2 | Jul 2025 – Dec 2025 | below 0.002 µg/l 12 Dec 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Perfluorohexanoic acid 8888 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Perfluorononanoic acid 8891 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jul 2025 – Dec 2025 | below 0.002 µg/l 12 Dec 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Jul 2025 – Jul 2025 | below 0.0005 µg/l 28 Jul 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Perfluorooctanesulfonic acid (total) 2958 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| Perfluorooctanoic acid 8890 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Jul 2025 – Dec 2025 | below 0.0005 µg/l 12 Dec 2025 |
| Perfluoropentanoic acid 8887 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Jul 2025 – Dec 2025 | below 0.006 µg/l 12 Dec 2025 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Jul 2025 – Dec 2025 | below 0.002 µg/l 12 Dec 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Jul 2025 – Dec 2025 | below 0.004 µg/l 12 Dec 2025 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Jul 2025 – Dec 2025 | below 0.001 µg/l 12 Dec 2025 |
| Phosphorus, Total as P 0348 | River water | 10 | Jan 2025 – Apr 2026 | 0.2 mg/l 30 Apr 2026 |
| Potassium, Dissolved 0209 | River water | 3 | Apr 2025 – Oct 2025 | 3.9 mg/l 24 Oct 2025 |
| Silica, reactive as SiO2 0182 | River water | 10 | Jan 2025 – Apr 2026 | 3.2 mg/l 30 Apr 2026 |
| Sodium, Dissolved 0205 | River water | 3 | Apr 2025 – Oct 2025 | 14 mg/l 24 Oct 2025 |
| Solids, Suspended at 105 C 0135 | River water | 10 | Jan 2025 – Apr 2026 | 8 mg/l 30 Apr 2026 |
| Strontium, Filtered 6693 | River water | 3 | Apr 2025 – Oct 2025 | 370 µg/l 24 Oct 2025 |
| Sulphate, Dissolved as SO4 7859 | River water | 3 | Apr 2025 – Oct 2025 | 52 mg/l 24 Oct 2025 |
| Trifluoroacetic acid 2872 | River water | 1 | Dec 2025 – Dec 2025 | 2.4 µg/l 12 Dec 2025 |
| Zinc : BLM Bioavailable 4822 | River water | 3 | Apr 2025 – Oct 2025 | 1.2 µg/l 24 Oct 2025 |
| Zinc, Dissolved 3408 | River water | 3 | Apr 2025 – Oct 2025 | 4.4 µg/l 24 Oct 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.