Boars Hill Farm, Worm Brook tributary - Worm
EA name: BOARS HILL FARM, WORM BROOK TRIB - WORM (also listed as “SSN1388 BOARS HILL FARM, WORM BROOK TRIB - WORM BROOK”)
Environment Agency sampling point MD-SSN1388 · 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, 12:259 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
- 30 since 26 Jan 2024 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 344211, 231904As published, to the nearest 1 m. Open in a map
- River, by its own name
- Boars Hill Farm
- 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) (30 samples)
9 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
91.9%
Sampled 18 Dec 2025, 9 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 12:25 | 91.9 | 91.9% |
| 29 May 2025, 12:38 | 97.6 | 97.6% |
| 1 Apr 2025, 11:22 | 97.6 | 97.6% |
| 3 Mar 2025, 11:29 | 99.8 | 99.8% |
| 12 Feb 2025, 12:30 | 98.8 | 98.8% |
| 6 Jan 2025, 14:02 | 95.9 | 95.9% |
| 4 Dec 2024, 12:35 | 92.2 | 92.2% |
| 2 Oct 2024, 10:57 | 80.8 | 80.8% |
| 2 Jul 2024, 10:23 | 53 | 53% |
| 6 Jun 2024, 11:10 | 81.5 | 81.5% |
| 3 May 2024, 12:03 | 80.5 | 80.5% |
| 8 Apr 2024, 11:59 | 98.8 | 98.8% |
| 4 Mar 2024, 10:46 | 104.2 | 104.2% |
| 8 Feb 2024, 12:13 | 92.8 | 92.8% |
| 26 Jan 2024, 15:01 | 97.8 | 97.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.6 mg/l
Sampled 18 Dec 2025, 9 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 12:25 | 10.6 | 10.6 mg/l |
| 29 May 2025, 12:38 | 9.33 | 9.33 mg/l |
| 1 Apr 2025, 11:22 | 11.1 | 11.1 mg/l |
| 3 Mar 2025, 11:29 | 11.9 | 11.9 mg/l |
| 12 Feb 2025, 12:30 | 12.1 | 12.1 mg/l |
| 6 Jan 2025, 14:02 | 12 | 12 mg/l |
| 4 Dec 2024, 12:35 | 10.6 | 10.6 mg/l |
| 2 Oct 2024, 10:57 | 8.61 | 8.61 mg/l |
| 2 Jul 2024, 10:23 | 5.31 | 5.31 mg/l |
| 6 Jun 2024, 11:10 | 8.7 | 8.7 mg/l |
| 3 May 2024, 12:03 | 8.92 | 8.92 mg/l |
| 8 Apr 2024, 11:59 | 10.7 | 10.7 mg/l |
| 4 Mar 2024, 10:46 | 13 | 13 mg/l |
| 8 Feb 2024, 12:13 | 11.2 | 11.2 mg/l |
| 26 Jan 2024, 15:01 | 11.7 | 11.7 mg/l |
Water temperature
code 0076 · °C
9.2 °C
Sampled 18 Dec 2025, 9 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 12:25 | 9.2 | 9.2 °C |
| 29 May 2025, 12:38 | 17.4 | 17.4 °C |
| 1 Apr 2025, 11:22 | 9.5 | 9.5 °C |
| 3 Mar 2025, 11:29 | 7.8 | 7.8 °C |
| 12 Feb 2025, 12:30 | 6.5 | 6.5 °C |
| 6 Jan 2025, 14:02 | 5.8 | 5.8 °C |
| 4 Dec 2024, 12:35 | 9 | 9 °C |
| 2 Oct 2024, 10:57 | 12.4 | 12.4 °C |
| 2 Jul 2024, 10:23 | 15.2 | 15.2 °C |
| 6 Jun 2024, 11:10 | 12.3 | 12.3 °C |
| 3 May 2024, 12:03 | 10.7 | 10.7 °C |
| 8 Apr 2024, 11:59 | 11.6 | 11.6 °C |
| 4 Mar 2024, 10:46 | 6 | 6 °C |
| 8 Feb 2024, 12:13 | 7 | 7 °C |
| 26 Jan 2024, 15:01 | 7.6 | 7.6 °C |
pH
code 0061
7.69
Sampled 18 Dec 2025, 9 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 12:25 | 7.69 | 7.69 |
| 29 May 2025, 12:38 | 8.07 | 8.07 |
| 1 Apr 2025, 11:22 | 7.96 | 7.96 |
| 3 Mar 2025, 11:29 | 8.04 | 8.04 |
| 12 Feb 2025, 12:30 | 8.05 | 8.05 |
| 6 Jan 2025, 14:02 | 7.48 | 7.48 |
| 4 Dec 2024, 12:35 | 7.87 | 7.87 |
| 2 Oct 2024, 10:57 | 7.64 | 7.64 |
| 2 Jul 2024, 10:23 | 7.51 | 7.51 |
| 6 Jun 2024, 11:10 | 7.81 | 7.81 |
| 3 May 2024, 12:03 | 7.46 | 7.46 |
| 8 Apr 2024, 11:59 | 7.61 | 7.61 |
| 4 Mar 2024, 10:46 | 8.09 | 8.09 |
| 8 Feb 2024, 12:13 | 7.44 | 7.44 |
| 26 Jan 2024, 15:01 | 7.92 | 7.92 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.02 mg/l
Sampled 18 Dec 2025, 9 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 12:25 | 0.02 | 0.02 mg/l |
| 29 May 2025, 12:38 | 0.028 | 0.028 mg/l |
| 1 Apr 2025, 11:22 | 0.0074 | 0.0074 mg/l |
| 3 Mar 2025, 11:29 | 0.024 | 0.024 mg/l |
| 12 Feb 2025, 12:30 | 0.059 | 0.059 mg/l |
| 6 Jan 2025, 14:02 | 0.041 | 0.041 mg/l |
| 4 Dec 2024, 12:35 | 0.042 | 0.042 mg/l |
| 2 Oct 2024, 10:57 | 0.047 | 0.047 mg/l |
| 2 Aug 2024, 10:49 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jul 2024, 10:23 | 0.09 | 0.09 mg/l |
| 6 Jun 2024, 11:10 | 0.0086 | 0.0086 mg/l |
| 3 May 2024, 12:03 | 0.14 | 0.14 mg/l |
| 8 Apr 2024, 11:59 | 0.047 | 0.047 mg/l |
| 4 Mar 2024, 10:46 | 0.021 | 0.021 mg/l |
| 8 Feb 2024, 12:13 | 0.03 | 0.03 mg/l |
| 26 Jan 2024, 15:01 | 0.049 | 0.049 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2 mg/l
Sampled 18 Dec 2025, 9 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 12:25 | 2 | 2 mg/l |
| 29 May 2025, 12:38 | 0.622 | 0.622 mg/l |
| 1 Apr 2025, 11:22 | 1.59 | 1.59 mg/l |
| 3 Mar 2025, 11:29 | 1.69 | 1.69 mg/l |
| 12 Feb 2025, 12:30 | 1.79 | 1.79 mg/l |
| 6 Jan 2025, 14:02 | 1.9 | 1.9 mg/l |
| 4 Dec 2024, 12:35 | 1.49 | 1.49 mg/l |
| 2 Oct 2024, 10:57 | 1.39 | 1.39 mg/l |
| 2 Aug 2024, 10:49 | 9.89 | 9.89 mg/l |
| 2 Jul 2024, 10:23 | 0.735 | 0.735 mg/l |
| 6 Jun 2024, 11:10 | 0.636 | 0.636 mg/l |
| 3 May 2024, 12:03 | 0.985 | 0.985 mg/l |
| 8 Apr 2024, 11:59 | 1.09 | 1.09 mg/l |
| 4 Mar 2024, 10:46 | 1.8 | 1.8 mg/l |
| 8 Feb 2024, 12:13 | 1.4 | 1.4 mg/l |
| 26 Jan 2024, 15:01 | 1.89 | 1.89 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.047 mg/l
Sampled 18 Dec 2025, 9 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 12:25 | 0.047 | 0.047 mg/l |
| 29 May 2025, 12:38 | 0.1 | 0.1 mg/l |
| 1 Apr 2025, 11:22 | 0.0071 | 0.0071 mg/l |
| 3 Mar 2025, 11:29 | 0.06 | 0.06 mg/l |
| 12 Feb 2025, 12:30 | 0.019 | 0.019 mg/l |
| 6 Jan 2025, 14:02 | 0.076 | 0.076 mg/l |
| 4 Dec 2024, 12:35 | 0.023 | 0.023 mg/l |
| 2 Oct 2024, 10:57 | 0.098 | 0.098 mg/l |
| 2 Aug 2024, 10:49 | 0.062 | 0.062 mg/l |
| 2 Jul 2024, 10:23 | 0.0022 | 0.0022 mg/l |
| 6 Jun 2024, 11:10 | 0.011 | 0.011 mg/l |
| 3 May 2024, 12:03 | 0.086 | 0.086 mg/l |
| 8 Apr 2024, 11:59 | 0.027 | 0.027 mg/l |
| 4 Mar 2024, 10:46 | 0.075 | 0.075 mg/l |
| 8 Feb 2024, 12:13 | 0.11 | 0.11 mg/l |
| 26 Jan 2024, 15:01 | 0.031 | 0.031 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
455 µS/cm
Sampled 18 Dec 2025, 9 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Dec 2025, 12:25 | 455 | 455 µS/cm |
| 29 May 2025, 12:38 | 637 | 637 µS/cm |
| 1 Apr 2025, 11:22 | 649 | 649 µS/cm |
| 3 Mar 2025, 11:29 | 644 | 644 µS/cm |
| 12 Feb 2025, 12:30 | 635 | 635 µS/cm |
| 6 Jan 2025, 14:02 | 302 | 302 µS/cm |
| 4 Dec 2024, 12:35 | 609 | 609 µS/cm |
| 2 Oct 2024, 10:57 | 469 | 469 µS/cm |
| 2 Jul 2024, 10:23 | 684 | 684 µS/cm |
| 6 Jun 2024, 11:10 | 662 | 662 µS/cm |
| 3 May 2024, 12:03 | 507 | 507 µS/cm |
| 8 Apr 2024, 11:59 | 497 | 497 µS/cm |
| 4 Mar 2024, 10:46 | 540 | 540 µS/cm |
| 8 Feb 2024, 12:13 | 251 | 251 µS/cm |
| 26 Jan 2024, 15:01 | 534 | 534 µS/cm |
Everything measured here
113 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 113 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 15 | Jan 2024 – Dec 2025 | 91.9% 18 Dec 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 15 | Jan 2024 – Dec 2025 | 10.6 mg/l 18 Dec 2025 |
| Temperature of Water 0076 | River water | 15 | Jan 2024 – Dec 2025 | 9.2 °C 18 Dec 2025 |
| pH 0061 | River water | 15 | Jan 2024 – Dec 2025 | 7.69 18 Dec 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 16 | Jan 2024 – Dec 2025 | 0.02 mg/l 18 Dec 2025 |
| Nitrate as N 0117 | River water | 16 | Jan 2024 – Dec 2025 | 2 mg/l 18 Dec 2025 |
| Orthophosphate, reactive as P 0180 | River water | 16 | Jan 2024 – Dec 2025 | 0.047 mg/l 18 Dec 2025 |
| Conductivity at 25 C 0077 | River water | 15 | Jan 2024 – Dec 2025 | 455 µS/cm 18 Dec 2025 |
| (Perfluorohexanesulfonyl)[3-(trimethylazaniumyl)propyl]azanide 2890 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| 10:2 Fluorotelomer sulfonic acid 2994 | River water | 1 | Dec 2025 – Dec 2025 | below 0.002 µg/l 18 Dec 2025 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| 2H-Perfluoro-2-decenoic acid 2888 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | May 2025 – Dec 2025 | below 0.004 µg/l 18 Dec 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| 5:1:2 Fluorotelomer betaine 2887 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| 5:3 Fluorotelomer betaine 2886 | River water | 1 | Dec 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| 6:2 Fluorotelomer phosphate diester 2986 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 18 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 18 Dec 2025 |
| 6:2 Fluorotelomer sulfonamide betaine 2985 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | May 2025 – Dec 2025 | 0.0051 µg/l 18 Dec 2025 |
| 6:2/8:2 Fluorotelomer phosphate diester 2884 | River water | 1 | Dec 2025 – Dec 2025 | below 0.01 µg/l 18 Dec 2025 |
| 6:6 Perfluorophosphinic acid 2883 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 18 Dec 2025 |
| 6:8 Perfluorophosphinic acid 2882 | River water | 1 | Dec 2025 – Dec 2025 | below 0.01 µg/l 18 Dec 2025 |
| 8:2 Fluorotelomer phosphate diester 2880 | River water | 1 | Dec 2025 – Dec 2025 | below 0.004 µg/l 18 Dec 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| 8:8 Perfluorophosphinic acid 2879 | River water | 1 | Dec 2025 – Dec 2025 | below 0.01 µg/l 18 Dec 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 16 | Jan 2024 – Dec 2025 | 190 mg/l 18 Dec 2025 |
| Aluminium, Dissolved 6037 | River water | 1 | Apr 2025 – Apr 2025 | below 20 µg/l 1 Apr 2025 |
| Aminomethylphosphonic acid 7125 | River water | 3 | Apr 2025 – Dec 2025 | below 0.1 µg/l 18 Dec 2025 |
| Ammonia un-ionised as N 0119 | River water | 15 | Jan 2024 – Dec 2025 | 0.00017 mg/l 18 Dec 2025 |
| Barium, Dissolved 9446 | River water | 1 | Apr 2025 – Apr 2025 | 540 µg/l 1 Apr 2025 |
| Boron, Dissolved 9447 | River water | 1 | Apr 2025 – Apr 2025 | below 100 µg/l 1 Apr 2025 |
| Cadmium, Dissolved 0106 | River water | 1 | Apr 2025 – Apr 2025 | below 0.01 µg/l 1 Apr 2025 |
| Calcium, Dissolved 0239 | River water | 1 | Apr 2025 – Apr 2025 | 120 mg/l 1 Apr 2025 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 10 | Jul 2024 – Dec 2025 | 5.1 mg/l 18 Dec 2025 |
| Chloride 0172 | River water | 16 | Jan 2024 – Dec 2025 | 19 mg/l 18 Dec 2025 |
| Chromium, Dissolved 3409 | River water | 1 | Apr 2025 – Apr 2025 | below 0.5 µg/l 1 Apr 2025 |
| Copper : BLM Bioavailable 4821 | River water | 1 | Apr 2025 – Apr 2025 | 0.29 µg/l 1 Apr 2025 |
| Copper, Dissolved 6450 | River water | 1 | Apr 2025 – Apr 2025 | 1.7 µg/l 1 Apr 2025 |
| eDNA Report 3047 | River water | 5 | Jun 2024 – Apr 2025 | 1 text result 1 Apr 2025 |
| Environmental DNA Filtration 3064 | River water | 3 | Jun 2024 – Oct 2024 | DNA Stored 4 Oct 2024 |
| Flow Type 2896 | River water | 18 | Jan 2024 – Dec 2025 | High Flow 18 Dec 2025 |
| Glyphosate 3007 | River water | 3 | Apr 2025 – Dec 2025 | below 0.1 µg/l 18 Dec 2025 |
| Hardness, Calcium 0163 | River water | 1 | Apr 2025 – Apr 2025 | 300 mg/l 1 Apr 2025 |
| Hardness, Total as CaCO3 0158 | River water | 1 | Apr 2025 – Apr 2025 | 333 mg/l 1 Apr 2025 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| Hexafluoropropylene oxide trimer acid 2980 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| Iron, Dissolved 6460 | River water | 1 | Apr 2025 – Apr 2025 | below 30 µg/l 1 Apr 2025 |
| Lead : BLM Bioavailable 3377 | River water | 1 | Apr 2025 – Apr 2025 | 0.02 µg/l 1 Apr 2025 |
| Lead, Dissolved 0052 | River water | 1 | Apr 2025 – Apr 2025 | below 0.1 µg/l 1 Apr 2025 |
| Lithium, Dissolved 4201 | River water | 1 | Apr 2025 – Apr 2025 | below 100 µg/l 1 Apr 2025 |
| Magnesium, Dissolved 0235 | River water | 1 | Apr 2025 – Apr 2025 | 8.1 mg/l 1 Apr 2025 |
| Manganese : BLM Bioavailable 4820 | River water | 1 | Apr 2025 – Apr 2025 | 2.6 µg/l 1 Apr 2025 |
| Manganese, Dissolved 6458 | River water | 1 | Apr 2025 – Apr 2025 | below 10 µg/l 1 Apr 2025 |
| Mitochondrial marker : Fish 12S 2857 | River water | 5 | Jun 2024 – Apr 2025 | Present 1 Apr 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | May 2025 – Dec 2025 | below 0.002 µg/l 18 Dec 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | May 2025 – Dec 2025 | below 0.002 µg/l 18 Dec 2025 |
| Nickel : BLM Bioavailable 3878 | River water | 1 | Apr 2025 – Apr 2025 | 0.13 µg/l 1 Apr 2025 |
| Nickel, Dissolved 3410 | River water | 1 | Apr 2025 – Apr 2025 | below 0.5 µg/l 1 Apr 2025 |
| Nitrite as N 0118 | River water | 16 | Jan 2024 – Dec 2025 | 0.005 mg/l 18 Dec 2025 |
| Nitrogen, Total as N 9686 | River water | 16 | Jan 2024 – Dec 2025 | 2.6 mg/l 18 Dec 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 16 | Jan 2024 – Dec 2025 | 2 mg/l 18 Dec 2025 |
| No flow /No sample 7668 | River water | 9 | Aug 2024 – Nov 2025 | No flow/discharge at sampling point 28 Nov 2025 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| Perfluorobutanoic acid 2995 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| Perfluorodecanoic acid 8892 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | May 2025 – Dec 2025 | below 0.005 µg/l 18 Dec 2025 |
| Perfluorododecanoic acid 8894 | River water | 2 | May 2025 – Dec 2025 | below 0.002 µg/l 18 Dec 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluoroheptanoic acid 8889 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluorohexanoic acid 8888 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluorononanoic acid 8891 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | May 2025 – Dec 2025 | below 0.002 µg/l 18 Dec 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluorooctanesulfonic acid (total) 2958 | River water | 1 | Dec 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| Perfluorooctanoic acid 8890 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | May 2025 – Dec 2025 | below 0.0005 µg/l 18 Dec 2025 |
| Perfluoropentanoic acid 8887 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | May 2025 – Dec 2025 | below 0.006 µg/l 18 Dec 2025 |
| Perfluorotridecanoic acid 2955 | River water | 2 | May 2025 – Dec 2025 | below 0.002 µg/l 18 Dec 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | May 2025 – Dec 2025 | below 0.004 µg/l 18 Dec 2025 |
| Perfluoroundecanoic acid 8893 | River water | 2 | May 2025 – Dec 2025 | below 0.001 µg/l 18 Dec 2025 |
| Phosphorus, Total as P 0348 | River water | 16 | Jan 2024 – Dec 2025 | 0.034 mg/l 18 Dec 2025 |
| Potassium, Dissolved 0209 | River water | 1 | Apr 2025 – Apr 2025 | 1.5 mg/l 1 Apr 2025 |
| Preparation: DNA 5923 | River water | 3 | Jun 2024 – Oct 2024 | Done 4 Oct 2024 |
| Silica, reactive as SiO2 0182 | River water | 16 | Jan 2024 – Dec 2025 | 5.5 mg/l 18 Dec 2025 |
| Sodium, Dissolved 0205 | River water | 1 | Apr 2025 – Apr 2025 | 15 mg/l 1 Apr 2025 |
| Solids, Suspended at 105 C 0135 | River water | 16 | Jan 2024 – Dec 2025 | 10 mg/l 18 Dec 2025 |
| Strontium, Filtered 6693 | River water | 1 | Apr 2025 – Apr 2025 | 460 µg/l 1 Apr 2025 |
| Sulphate, Dissolved as SO4 7859 | River water | 1 | Apr 2025 – Apr 2025 | 17 mg/l 1 Apr 2025 |
| Zinc : BLM Bioavailable 4822 | River water | 1 | Apr 2025 – Apr 2025 | 1.1 µg/l 1 Apr 2025 |
| Zinc, Dissolved 3408 | River water | 1 | Apr 2025 – Apr 2025 | 2.1 µg/l 1 Apr 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.