Darn Gill
EA name: SSN0866 DARN GILL
Environment Agency sampling point NE-SSN0866 · 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
- 18 Dec 2025, 09:089 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
- 11 since 23 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 377208, 537260As published, to the nearest 1 m. Open in a map
- River, by its own name
- Darn Gill
- River, by the map
- Darn GillPlaced on the river its name gives, 6 m from the line.
- Next gauge downstream
- Alston On the River South Tyne · 13 km along the river
- Why it was sampled
- Monitoring (national agency policy) (11 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
102.1%
Sampled 18 Dec 2025, 9 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 09:08 | 102.1 | 102.1% |
| 10 Nov 2025, 11:40 | 100.6 | 100.6% |
| 20 Oct 2025, 12:17 | 100.5 | 100.5% |
| 22 Sep 2025, 15:01 | 99.8 | 99.8% |
| 22 Aug 2025, 17:07 | 101.2 | 101.2% |
| 22 Jul 2025, 15:46 | 97.2 | 97.2% |
| 16 May 2025, 08:28 | 72.5 | 72.5% |
| 24 Apr 2025, 07:49 | 97.3 | 97.3% |
| 20 Mar 2025, 10:47 | 101.6 | 101.6% |
| 26 Feb 2025, 12:10 | 101.7 | 101.7% |
| 23 Jan 2025, 10:41 | 100.8 | 100.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
13 mg/l
Sampled 18 Dec 2025, 9 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 09:08 | 13 | 13 mg/l |
| 10 Nov 2025, 11:40 | 11.8 | 11.8 mg/l |
| 20 Oct 2025, 12:17 | 11.8 | 11.8 mg/l |
| 22 Sep 2025, 15:01 | 11.6 | 11.6 mg/l |
| 22 Aug 2025, 17:07 | 10.6 | 10.6 mg/l |
| 22 Jul 2025, 15:46 | 9.86 | 9.86 mg/l |
| 16 May 2025, 08:28 | 8.53 | 8.53 mg/l |
| 24 Apr 2025, 07:49 | 12 | 12 mg/l |
| 20 Mar 2025, 10:47 | 13.3 | 13.3 mg/l |
| 26 Feb 2025, 12:10 | 13.7 | 13.7 mg/l |
| 23 Jan 2025, 10:41 | 14.1 | 14.1 mg/l |
Water temperature
code 0076 · °C
5 °C
Sampled 18 Dec 2025, 9 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 09:08 | 5 | 5 °C |
| 10 Nov 2025, 11:40 | 8.3 | 8.3 °C |
| 20 Oct 2025, 12:17 | 8.4 | 8.4 °C |
| 22 Sep 2025, 15:01 | 8.7 | 8.7 °C |
| 22 Aug 2025, 17:07 | 13 | 13 °C |
| 22 Jul 2025, 15:46 | 14.6 | 14.6 °C |
| 16 May 2025, 08:28 | 8.2 | 8.2 °C |
| 24 Apr 2025, 07:49 | 6.4 | 6.4 °C |
| 20 Mar 2025, 10:47 | 4 | 4 °C |
| 26 Feb 2025, 12:10 | 2.9 | 2.9 °C |
| 23 Jan 2025, 10:41 | 1.6 | 1.6 °C |
pH
code 0061
8.08
Sampled 18 Dec 2025, 9 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 09:08 | 8.08 | 8.08 |
| 10 Nov 2025, 11:40 | 4.75 | 4.75 |
| 20 Oct 2025, 12:17 | 6.79 | 6.79 |
| 22 Sep 2025, 15:01 | 7.39 | 7.39 |
| 22 Aug 2025, 17:07 | 8 | 8 |
| 22 Jul 2025, 15:46 | 7.54 | 7.54 |
| 16 May 2025, 08:28 | 7.37 | 7.37 |
| 24 Apr 2025, 07:49 | 7.64 | 7.64 |
| 20 Mar 2025, 10:47 | 7.7 | 7.7 |
| 26 Feb 2025, 12:10 | 7.43 | 7.43 |
| 23 Jan 2025, 10:41 | 7.66 | 7.66 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.002 mg/l (not detected above this)
Sampled 18 Dec 2025, 9 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 09:08 | <0.002 | below 0.002 mg/l (not detected above this) |
| 10 Nov 2025, 11:40 | <0.002 | below 0.002 mg/l (not detected above this) |
| 20 Oct 2025, 12:17 | <0.002 | below 0.002 mg/l (not detected above this) |
| 22 Sep 2025, 15:01 | <0.002 | below 0.002 mg/l (not detected above this) |
| 22 Aug 2025, 17:07 | 0.006 | 0.006 mg/l |
| 22 Jul 2025, 15:46 | <0.002 | below 0.002 mg/l (not detected above this) |
| 16 May 2025, 08:28 | 0.0024 | 0.0024 mg/l |
| 24 Apr 2025, 07:49 | 0.0049 | 0.0049 mg/l |
| 20 Mar 2025, 10:47 | <0.002 | below 0.002 mg/l (not detected above this) |
| 26 Feb 2025, 12:10 | <0.002 | below 0.002 mg/l (not detected above this) |
| 23 Jan 2025, 10:41 | <0.002 | below 0.002 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.084 mg/l
Sampled 18 Dec 2025, 9 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 09:08 | 0.084 | 0.084 mg/l |
| 10 Nov 2025, 11:40 | 0.047 | 0.047 mg/l |
| 20 Oct 2025, 12:17 | 0.071 | 0.071 mg/l |
| 22 Sep 2025, 15:01 | 0.064 | 0.064 mg/l |
| 22 Aug 2025, 17:07 | 0.028 | 0.028 mg/l |
| 22 Jul 2025, 15:46 | <0.004 | below 0.004 mg/l (not detected above this) |
| 16 May 2025, 08:28 | 0.039 | 0.039 mg/l |
| 24 Apr 2025, 07:49 | 0.0608 | 0.0608 mg/l |
| 20 Mar 2025, 10:47 | 0.091 | 0.091 mg/l |
| 26 Feb 2025, 12:10 | 0.129 | 0.129 mg/l |
| 23 Jan 2025, 10:41 | 0.119 | 0.119 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.0025 mg/l
Sampled 18 Dec 2025, 9 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 09:08 | 0.0025 | 0.0025 mg/l |
| 10 Nov 2025, 11:40 | 0.003 | 0.003 mg/l |
| 20 Oct 2025, 12:17 | 0.0044 | 0.0044 mg/l |
| 22 Sep 2025, 15:01 | 0.0028 | 0.0028 mg/l |
| 22 Aug 2025, 17:07 | <0.001 | below 0.001 mg/l (not detected above this) |
| 22 Jul 2025, 15:46 | 0.0041 | 0.0041 mg/l |
| 16 May 2025, 08:28 | <0.001 | below 0.001 mg/l (not detected above this) |
| 24 Apr 2025, 07:49 | <0.001 | below 0.001 mg/l (not detected above this) |
| 20 Mar 2025, 10:47 | <0.001 | below 0.001 mg/l (not detected above this) |
| 26 Feb 2025, 12:10 | <0.001 | below 0.001 mg/l (not detected above this) |
| 23 Jan 2025, 10:41 | 0.0015 | 0.0015 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
35 µS/cm
Sampled 18 Dec 2025, 9 months ago · 11 results banked
Every result (11)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 09:08 | 35 | 35 µS/cm |
| 10 Nov 2025, 11:40 | 35 | 35 µS/cm |
| 20 Oct 2025, 12:17 | 44 | 44 µS/cm |
| 22 Sep 2025, 15:01 | 63 | 63 µS/cm |
| 22 Aug 2025, 17:07 | 162 | 162 µS/cm |
| 22 Jul 2025, 15:46 | 92 | 92 µS/cm |
| 16 May 2025, 08:28 | 209 | 209 µS/cm |
| 24 Apr 2025, 07:49 | 150 | 150 µS/cm |
| 20 Mar 2025, 10:47 | 161 | 161 µS/cm |
| 26 Feb 2025, 12:10 | 152 | 152 µS/cm |
| 23 Jan 2025, 10:41 | 109 | 109 µS/cm |
Everything measured here
102 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 102 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 11 | Jan 2025 – Dec 2025 | 102.1% 18 Dec 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 11 | Jan 2025 – Dec 2025 | 13 mg/l 18 Dec 2025 |
| Temperature of Water 0076 | River water | 11 | Jan 2025 – Dec 2025 | 5 °C 18 Dec 2025 |
| pH 0061 | River water | 11 | Jan 2025 – Dec 2025 | 8.08 18 Dec 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 11 | Jan 2025 – Dec 2025 | below 0.002 mg/l 18 Dec 2025 |
| Nitrate as N 0117 | River water | 11 | Jan 2025 – Dec 2025 | 0.084 mg/l 18 Dec 2025 |
| Orthophosphate, reactive as P 0180 | River water | 11 | Jan 2025 – Dec 2025 | 0.0025 mg/l 18 Dec 2025 |
| Conductivity at 25 C 0077 | River water | 11 | Jan 2025 – Dec 2025 | 35 µS/cm 18 Dec 2025 |
| 10:2 Fluorotelomer sulfonic acid 2994 | River water | 1 | Sep 2025 – Sep 2025 | below 0.002 µg/l 22 Sep 2025 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| 2H-Perfluoro-2-decenoic acid 2888 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Sep 2025 – Sep 2025 | below 0.004 µg/l 22 Sep 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| 5:1:2 Fluorotelomer betaine 2887 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| 5:3 Fluorotelomer betaine 2886 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| 6:2 Fluorotelomer phosphate diester 2986 | River water | 1 | Sep 2025 – Sep 2025 | below 0.004 µg/l 22 Sep 2025 |
| 6:2 Fluorotelomer sulfonamide amine oxide (6:2 FTNO) (Capstone A) 2841 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| 6:2 Fluorotelomer sulfonamide betaine 2985 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| 6:2/8:2 Fluorotelomer phosphate diester 2884 | River water | 1 | Sep 2025 – Sep 2025 | below 0.01 µg/l 22 Sep 2025 |
| 6:6 Perfluorophosphinic acid 2883 | River water | 1 | Sep 2025 – Sep 2025 | below 0.004 µg/l 22 Sep 2025 |
| 6:8 Perfluorophosphinic acid 2882 | River water | 1 | Sep 2025 – Sep 2025 | below 0.01 µg/l 22 Sep 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| 8:8 Perfluorophosphinic acid 2879 | River water | 1 | Sep 2025 – Sep 2025 | below 0.01 µg/l 22 Sep 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Alkalinity to pH 4.5 : Grans Plot 7610 | River water | 11 | Jan 2025 – Dec 2025 | 3.6 mg/l 18 Dec 2025 |
| Aluminium, Dissolved 6037 | River water | 3 | Apr 2025 – Oct 2025 | 160 µg/l 20 Oct 2025 |
| Aminomethylphosphonic acid 7125 | River water | 8 | Apr 2025 – Dec 2025 | below 0.1 µg/l 18 Dec 2025 |
| Ammonia un-ionised as N 0119 | River water | 11 | Jan 2025 – Dec 2025 | below 0.00003 mg/l 18 Dec 2025 |
| Barium, Dissolved 9446 | River water | 3 | Apr 2025 – Oct 2025 | 13 µg/l 20 Oct 2025 |
| Boron, Dissolved 9447 | River water | 3 | Apr 2025 – Oct 2025 | below 100 µg/l 20 Oct 2025 |
| Cadmium, Dissolved 0106 | River water | 3 | Apr 2025 – Oct 2025 | 0.04 µg/l 20 Oct 2025 |
| Calcium, Dissolved 0239 | River water | 3 | Apr 2025 – Oct 2025 | 3.7 mg/l 20 Oct 2025 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 10 | Jan 2025 – Dec 2025 | 8.2 mg/l 18 Dec 2025 |
| Chromium, Dissolved 3409 | River water | 3 | Apr 2025 – Oct 2025 | below 0.5 µg/l 20 Oct 2025 |
| Copper : BLM Bioavailable 4821 | River water | 2 | Apr 2025 – Jul 2025 | 0.03 µg/l 22 Jul 2025 |
| Copper, Dissolved 6450 | River water | 3 | Apr 2025 – Oct 2025 | 1.4 µg/l 20 Oct 2025 |
| Flow Type 2896 | River water | 11 | Jan 2025 – Dec 2025 | Moderate Flow 18 Dec 2025 |
| Glyphosate 3007 | River water | 8 | Apr 2025 – Dec 2025 | below 0.1 µg/l 18 Dec 2025 |
| Hardness, Calcium 0163 | River water | 3 | Apr 2025 – Oct 2025 | 9.24 mg/l 20 Oct 2025 |
| Hardness, Total as CaCO3 0158 | River water | 3 | Apr 2025 – Oct 2025 | 12.2 mg/l 20 Oct 2025 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| Hexafluoropropylene oxide trimer acid 2980 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| Iron, Dissolved 6460 | River water | 3 | Apr 2025 – Oct 2025 | 740 µg/l 20 Oct 2025 |
| Lead : BLM Bioavailable 3377 | River water | 2 | Apr 2025 – Jul 2025 | 0.21 µg/l 22 Jul 2025 |
| Lead, Dissolved 0052 | River water | 3 | Apr 2025 – Oct 2025 | 3.8 µg/l 20 Oct 2025 |
| Lithium, Dissolved 4201 | River water | 3 | Apr 2025 – Oct 2025 | below 100 µg/l 20 Oct 2025 |
| Magnesium, Dissolved 0235 | River water | 3 | Apr 2025 – Oct 2025 | 0.71 mg/l 20 Oct 2025 |
| Manganese : BLM Bioavailable 4820 | River water | 2 | Apr 2025 – Jul 2025 | 33 µg/l 22 Jul 2025 |
| Manganese, Dissolved 6458 | River water | 3 | Apr 2025 – Oct 2025 | 140 µg/l 20 Oct 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Sep 2025 – Sep 2025 | below 0.002 µg/l 22 Sep 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Sep 2025 – Sep 2025 | below 0.002 µg/l 22 Sep 2025 |
| Nickel : BLM Bioavailable 3878 | River water | 2 | Apr 2025 – Jul 2025 | 0.48 µg/l 22 Jul 2025 |
| Nickel, Dissolved 3410 | River water | 3 | Apr 2025 – Oct 2025 | 2.8 µg/l 20 Oct 2025 |
| Nitrite as N 0118 | River water | 11 | Jan 2025 – Dec 2025 | below 0.001 mg/l 18 Dec 2025 |
| Nitrogen, Total as N 9686 | River water | 11 | Jan 2025 – Dec 2025 | 0.48 mg/l 18 Dec 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 11 | Jan 2025 – Dec 2025 | 0.085 mg/l 18 Dec 2025 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Perfluorobutanoic acid 2995 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| Perfluorodecanoic acid 8892 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Sep 2025 – Sep 2025 | below 0.005 µg/l 22 Sep 2025 |
| Perfluorododecanoic acid 8894 | River water | 1 | Sep 2025 – Sep 2025 | below 0.002 µg/l 22 Sep 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Perfluorohexanoic acid 8888 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | Sep 2025 – Sep 2025 | below 0.002 µg/l 22 Sep 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Perfluorooctanesulfonic acid (total) 2958 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| Perfluorooctanoic acid 8890 | River water | 1 | Sep 2025 – Sep 2025 | 0.00054 µg/l 22 Sep 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Sep 2025 – Sep 2025 | below 0.0005 µg/l 22 Sep 2025 |
| Perfluoropentanoic acid 8887 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Sep 2025 – Sep 2025 | below 0.006 µg/l 22 Sep 2025 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Sep 2025 – Sep 2025 | below 0.002 µg/l 22 Sep 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Sep 2025 – Sep 2025 | below 0.004 µg/l 22 Sep 2025 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Sep 2025 – Sep 2025 | below 0.001 µg/l 22 Sep 2025 |
| Phosphorus, Total as P 0348 | River water | 11 | Jan 2025 – Dec 2025 | 0.012 mg/l 18 Dec 2025 |
| Potassium, Dissolved 0209 | River water | 3 | Apr 2025 – Oct 2025 | 0.33 mg/l 20 Oct 2025 |
| Silica, reactive as SiO2 0182 | River water | 11 | Jan 2025 – Dec 2025 | 0.79 mg/l 18 Dec 2025 |
| Sodium, Dissolved 0205 | River water | 3 | Apr 2025 – Oct 2025 | 3.8 mg/l 20 Oct 2025 |
| Solids, Suspended at 105 C 0135 | River water | 11 | Jan 2025 – Dec 2025 | below 3 mg/l 18 Dec 2025 |
| Strontium, Filtered 6693 | River water | 3 | Apr 2025 – Oct 2025 | below 20 µg/l 20 Oct 2025 |
| Sulphate, Dissolved as SO4 7859 | River water | 3 | Apr 2025 – Oct 2025 | below 10 mg/l 20 Oct 2025 |
| Zinc : BLM Bioavailable 4822 | River water | 2 | Apr 2025 – Jul 2025 | 1.4 µg/l 22 Jul 2025 |
| Zinc, Dissolved 3408 | River water | 3 | Apr 2025 – Oct 2025 | 11 µg/l 20 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.