Leys Farm Ditch at A4095 Roadbridge, Middleton Stoney
EA name: LEYS FARM DITCH AT A4095 ROADBRIDGE, MID (also listed as “LEYS FARM DITCH AT A4095 ROADBRIDGE, MIDDLETON STONEY”)
Environment Agency sampling point TH-PCHR0148 · 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
- 27 May 2026, 10:004 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
- 25 since 17 Oct 2023 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 452233, 221701As published, to the nearest 1 m. Open in a map
- River, by its own name
- Leys Farm Ditch
- River, by the map
- An unnamed streamPlaced by position alone (the only river line close by), 27 m from the line.
- Next gauge downstream
- Islip On the River Ray · 11 km along the river
- Why it was sampled
- Monitoring (national agency policy) (25 samples)
3 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
107.4%
Sampled 7 Apr 2026, 6 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Apr 2026, 10:36 | 107.4 | 107.4% |
| 10 Mar 2026, 09:50 | 104.8 | 104.8% |
| 4 Feb 2026, 11:23 | 94 | 94% |
| 2 Jan 2026, 12:23 | 94.5 | 94.5% |
| 31 Mar 2025, 10:31 | 111.8 | 111.8% |
| 13 Mar 2025, 13:12 | 105.2 | 105.2% |
| 4 Feb 2025, 11:53 | 94.6 | 94.6% |
| 21 Jan 2025, 11:38 | 98.3 | 98.3% |
| 9 Dec 2024, 11:02 | 91.9 | 91.9% |
| 14 Oct 2024, 09:37 | 95.9 | 95.9% |
| 23 Jul 2024, 11:53 | 97.6 | 97.6% |
| 28 Jun 2024, 09:50 | 88.8 | 88.8% |
| 13 May 2024, 10:15 | 99.3 | 99.3% |
| 22 Apr 2024, 11:35 | 99.1 | 99.1% |
| 22 Mar 2024, 12:36 | 101.3 | 101.3% |
| 26 Feb 2024, 10:20 | 94.4 | 94.4% |
| 15 Jan 2024, 11:05 | 88.7 | 88.7% |
| 5 Dec 2023, 09:34 | 88 | 88% |
| 20 Nov 2023, 09:35 | 84.3 | 84.3% |
| 30 Oct 2023, 09:59 | 87 | 87% |
| 17 Oct 2023, 09:12 | 77 | 77% |
Dissolved oxygen
as O2 · code 9924 · mg/l
12.1 mg/l
Sampled 7 Apr 2026, 6 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Apr 2026, 10:36 | 12.1 | 12.1 mg/l |
| 10 Mar 2026, 09:50 | 12.2 | 12.2 mg/l |
| 4 Feb 2026, 11:23 | 11.2 | 11.2 mg/l |
| 2 Jan 2026, 12:23 | 11.9 | 11.9 mg/l |
| 31 Mar 2025, 10:31 | 13.1 | 13.1 mg/l |
| 13 Mar 2025, 13:12 | 12.5 | 12.5 mg/l |
| 4 Feb 2025, 11:53 | 11.5 | 11.5 mg/l |
| 21 Jan 2025, 11:38 | 12.1 | 12.1 mg/l |
| 9 Dec 2024, 11:02 | 10.8 | 10.8 mg/l |
| 14 Oct 2024, 09:37 | 10.7 | 10.7 mg/l |
| 23 Jul 2024, 11:53 | 9.39 | 9.39 mg/l |
| 28 Jun 2024, 09:50 | 9.15 | 9.15 mg/l |
| 13 May 2024, 10:15 | 9.86 | 9.86 mg/l |
| 22 Apr 2024, 11:35 | 11.2 | 11.2 mg/l |
| 22 Mar 2024, 12:36 | 11 | 11 mg/l |
| 26 Feb 2024, 10:20 | 11.4 | 11.4 mg/l |
| 15 Jan 2024, 11:05 | 11.2 | 11.2 mg/l |
| 5 Dec 2023, 09:34 | 10.7 | 10.7 mg/l |
| 20 Nov 2023, 09:35 | 9.48 | 9.48 mg/l |
| 30 Oct 2023, 09:59 | 9.62 | 9.62 mg/l |
| 17 Oct 2023, 09:12 | 8.76 | 8.76 mg/l |
Water temperature
code 0076 · °C
10.1 °C
Sampled 7 Apr 2026, 6 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Apr 2026, 10:36 | 10.1 | 10.1 °C |
| 10 Mar 2026, 09:50 | 8.6 | 8.6 °C |
| 4 Feb 2026, 11:23 | 7.7 | 7.7 °C |
| 2 Jan 2026, 12:23 | 5.4 | 5.4 °C |
| 31 Mar 2025, 10:31 | 8.5 | 8.5 °C |
| 13 Mar 2025, 13:12 | 7.8 | 7.8 °C |
| 4 Feb 2025, 11:53 | 7 | 7 °C |
| 21 Jan 2025, 11:38 | 6.3 | 6.3 °C |
| 9 Dec 2024, 11:02 | 8.1 | 8.1 °C |
| 14 Oct 2024, 09:37 | 10.3 | 10.3 °C |
| 23 Jul 2024, 11:53 | 17.1 | 17.1 °C |
| 28 Jun 2024, 09:50 | 13.9 | 13.9 °C |
| 13 May 2024, 10:15 | 15.6 | 15.6 °C |
| 22 Apr 2024, 11:35 | 10 | 10 °C |
| 22 Mar 2024, 12:36 | 11.4 | 11.4 °C |
| 26 Feb 2024, 10:20 | 7.1 | 7.1 °C |
| 15 Jan 2024, 11:05 | 5.3 | 5.3 °C |
| 5 Dec 2023, 09:34 | 6.9 | 6.9 °C |
| 20 Nov 2023, 09:35 | 10.1 | 10.1 °C |
| 30 Oct 2023, 09:59 | 10.8 | 10.8 °C |
| 17 Oct 2023, 09:12 | 9.6 | 9.6 °C |
pH
code 0061
8.13
Sampled 7 Apr 2026, 6 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Apr 2026, 10:36 | 8.13 | 8.13 |
| 10 Mar 2026, 09:50 | 8.16 | 8.16 |
| 4 Feb 2026, 11:23 | 7.9 | 7.9 |
| 2 Jan 2026, 12:23 | 7.81 | 7.81 |
| 31 Mar 2025, 10:31 | 8.53 | 8.53 |
| 13 Mar 2025, 13:12 | 7.81 | 7.81 |
| 4 Feb 2025, 11:53 | 7.7 | 7.7 |
| 21 Jan 2025, 11:38 | 7.78 | 7.78 |
| 9 Dec 2024, 11:02 | 7.76 | 7.76 |
| 14 Oct 2024, 09:37 | 7.78 | 7.78 |
| 23 Jul 2024, 11:53 | 8.12 | 8.12 |
| 28 Jun 2024, 09:50 | 8.21 | 8.21 |
| 13 May 2024, 10:15 | 7.94 | 7.94 |
| 22 Apr 2024, 11:35 | 7.94 | 7.94 |
| 22 Mar 2024, 12:36 | 7.9 | 7.9 |
| 26 Feb 2024, 10:20 | 7.91 | 7.91 |
| 15 Jan 2024, 11:05 | 7.78 | 7.78 |
| 5 Dec 2023, 09:34 | 7.87 | 7.87 |
| 20 Nov 2023, 09:35 | 7.72 | 7.72 |
| 30 Oct 2023, 09:59 | 7.76 | 7.76 |
| 17 Oct 2023, 09:12 | 7.76 | 7.76 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 7 Apr 2026, 6 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Apr 2026, 10:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Mar 2026, 09:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2026, 11:23 | 0.12 | 0.12 mg/l |
| 2 Jan 2026, 12:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 31 Mar 2025, 10:31 | 0.07 | 0.07 mg/l |
| 13 Mar 2025, 13:12 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2025, 11:53 | 0.22 | 0.22 mg/l |
| 21 Jan 2025, 11:38 | 0.078 | 0.078 mg/l |
| 9 Dec 2024, 11:02 | 0.12 | 0.12 mg/l |
| 14 Oct 2024, 09:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Jul 2024, 11:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Jun 2024, 09:50 | 0.067 | 0.067 mg/l |
| 13 May 2024, 10:15 | 0.044 | 0.044 mg/l |
| 22 Apr 2024, 11:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Mar 2024, 12:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Feb 2024, 10:20 | 0.049 | 0.049 mg/l |
| 15 Jan 2024, 11:05 | 0.1 | 0.1 mg/l |
| 5 Dec 2023, 09:34 | 0.31 | 0.31 mg/l |
| 20 Nov 2023, 09:35 | 0.084 | 0.084 mg/l |
| 30 Oct 2023, 09:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Oct 2023, 09:12 | 0.099 | 0.099 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
11 mg/l
Sampled 7 Apr 2026, 6 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Apr 2026, 10:36 | 11 | 11 mg/l |
| 10 Mar 2026, 09:50 | 13 | 13 mg/l |
| 4 Feb 2026, 11:23 | 12.9 | 12.9 mg/l |
| 2 Jan 2026, 12:23 | 15 | 15 mg/l |
| 31 Mar 2025, 10:31 | 7.53 | 7.53 mg/l |
| 13 Mar 2025, 13:12 | 11 | 11 mg/l |
| 4 Feb 2025, 11:53 | 9.91 | 9.91 mg/l |
| 21 Jan 2025, 11:38 | 10.9 | 10.9 mg/l |
| 9 Dec 2024, 11:02 | 8.63 | 8.63 mg/l |
| 14 Oct 2024, 09:37 | 9.35 | 9.35 mg/l |
| 23 Jul 2024, 11:53 | 3.88 | 3.88 mg/l |
| 28 Jun 2024, 09:50 | 9.36 | 9.36 mg/l |
| 13 May 2024, 10:15 | 7.53 | 7.53 mg/l |
| 22 Apr 2024, 11:35 | 11 | 11 mg/l |
| 22 Mar 2024, 12:36 | 12 | 12 mg/l |
| 26 Feb 2024, 10:20 | 13 | 13 mg/l |
| 15 Jan 2024, 11:05 | 14.9 | 14.9 mg/l |
| 5 Dec 2023, 09:34 | 10.9 | 10.9 mg/l |
| 20 Nov 2023, 09:35 | 10.9 | 10.9 mg/l |
| 30 Oct 2023, 09:59 | 9.33 | 9.33 mg/l |
| 17 Oct 2023, 09:12 | 4.79 | 4.79 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.56 mg/l
Sampled 7 Apr 2026, 6 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Apr 2026, 10:36 | 0.56 | 0.56 mg/l |
| 10 Mar 2026, 09:50 | 0.32 | 0.32 mg/l |
| 4 Feb 2026, 11:23 | 0.28 | 0.28 mg/l |
| 2 Jan 2026, 12:23 | 0.35 | 0.35 mg/l |
| 31 Mar 2025, 10:31 | 0.45 | 0.45 mg/l |
| 13 Mar 2025, 13:12 | 0.35 | 0.35 mg/l |
| 4 Feb 2025, 11:53 | 0.28 | 0.28 mg/l |
| 21 Jan 2025, 11:38 | 0.29 | 0.29 mg/l |
| 9 Dec 2024, 11:02 | 0.21 | 0.21 mg/l |
| 14 Oct 2024, 09:37 | 0.24 | 0.24 mg/l |
| 23 Jul 2024, 11:53 | 0.41 | 0.41 mg/l |
| 28 Jun 2024, 09:50 | 0.17 | 0.17 mg/l |
| 13 May 2024, 10:15 | 0.32 | 0.32 mg/l |
| 22 Apr 2024, 11:35 | 0.2 | 0.2 mg/l |
| 22 Mar 2024, 12:36 | 0.25 | 0.25 mg/l |
| 26 Feb 2024, 10:20 | 0.18 | 0.18 mg/l |
| 15 Jan 2024, 11:05 | 0.23 | 0.23 mg/l |
| 5 Dec 2023, 09:34 | 0.36 | 0.36 mg/l |
| 20 Nov 2023, 09:35 | 0.26 | 0.26 mg/l |
| 30 Oct 2023, 09:59 | 0.29 | 0.29 mg/l |
| 17 Oct 2023, 09:12 | 0.67 | 0.67 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
348 µS/cm
Sampled 7 Apr 2026, 6 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Apr 2026, 10:36 | 348 | 348 µS/cm |
| 10 Mar 2026, 09:50 | 710 | 710 µS/cm |
| 4 Feb 2026, 11:23 | 341 | 341 µS/cm |
| 2 Jan 2026, 12:23 | 742 | 742 µS/cm |
| 31 Mar 2025, 10:31 | 681 | 681 µS/cm |
| 13 Mar 2025, 13:12 | 711 | 711 µS/cm |
| 4 Feb 2025, 11:53 | 675 | 675 µS/cm |
| 21 Jan 2025, 11:38 | 714 | 714 µS/cm |
| 9 Dec 2024, 11:02 | 662 | 662 µS/cm |
| 14 Oct 2024, 09:37 | 684 | 684 µS/cm |
| 23 Jul 2024, 11:53 | 590 | 590 µS/cm |
| 28 Jun 2024, 09:50 | 722 | 722 µS/cm |
| 13 May 2024, 10:15 | 604 | 604 µS/cm |
| 22 Apr 2024, 11:35 | 703 | 703 µS/cm |
| 22 Mar 2024, 12:36 | 708 | 708 µS/cm |
| 26 Feb 2024, 10:20 | 722 | 722 µS/cm |
| 15 Jan 2024, 11:05 | 858 | 858 µS/cm |
| 5 Dec 2023, 09:34 | 698 | 698 µS/cm |
| 20 Nov 2023, 09:35 | 702 | 702 µS/cm |
| 30 Oct 2023, 09:59 | 728 | 728 µS/cm |
| 17 Oct 2023, 09:12 | 612 | 612 µS/cm |
Everything measured here
61 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 61 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 21 | Oct 2023 – Apr 2026 | 107.4% 7 Apr 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 21 | Oct 2023 – Apr 2026 | 12.1 mg/l 7 Apr 2026 |
| Temperature of Water 0076 | River water | 21 | Oct 2023 – Apr 2026 | 10.1 °C 7 Apr 2026 |
| pH 0061 | River water | 21 | Oct 2023 – Apr 2026 | 8.13 7 Apr 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 21 | Oct 2023 – Apr 2026 | below 0.03 mg/l 7 Apr 2026 |
| Nitrate as N 0117 | River water | 21 | Oct 2023 – Apr 2026 | 11 mg/l 7 Apr 2026 |
| Orthophosphate, reactive as P 0180 | River water | 21 | Oct 2023 – Apr 2026 | 0.56 mg/l 7 Apr 2026 |
| Conductivity at 25 C 0077 | River water | 21 | Oct 2023 – Apr 2026 | 348 µS/cm 7 Apr 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 3 | Nov 2023 – Apr 2025 | below 0.001 µg/l 30 Apr 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 3 | Nov 2023 – Apr 2025 | below 0.001 µg/l 30 Apr 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 3 | Nov 2023 – Apr 2025 | below 0.001 µg/l 30 Apr 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 3 | Nov 2023 – Apr 2025 | below 0.002 µg/l 30 Apr 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 3 | Nov 2023 – Apr 2025 | below 0.0005 µg/l 30 Apr 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 3 | Nov 2023 – Apr 2025 | below 0.001 µg/l 30 Apr 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 3 | Nov 2023 – Apr 2025 | below 0.0005 µg/l 30 Apr 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 3 | Nov 2023 – Apr 2025 | below 0.004 µg/l 30 Apr 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 3 | Nov 2023 – Apr 2025 | below 0.005 µg/l 30 Apr 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 3 | Nov 2023 – Apr 2025 | below 0.0005 µg/l 30 Apr 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 3 | Nov 2023 – Apr 2025 | 0.11 µg/l 30 Apr 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 3 | Nov 2023 – Apr 2025 | 0.0019 µg/l 30 Apr 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 3 | Nov 2023 – Apr 2025 | below 0.0005 µg/l 30 Apr 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 21 | Oct 2023 – Apr 2026 | 250 mg/l 7 Apr 2026 |
| Ammonia un-ionised as N 0119 | River water | 21 | Oct 2023 – Apr 2026 | below 0.00055 mg/l 7 Apr 2026 |
| BOD : 5 Day ATU 0085 | River water | 16 | Feb 2024 – Apr 2026 | 1.5 mg/l 7 Apr 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 3 | Nov 2023 – Apr 2025 | below 0.001 µg/l 30 Apr 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 3 | Nov 2023 – Apr 2025 | below 0.002 µg/l 30 Apr 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 3 | Nov 2023 – Apr 2025 | below 0.002 µg/l 30 Apr 2025 |
| Nitrite as N 0118 | River water | 21 | Oct 2023 – Apr 2026 | 0.044 mg/l 7 Apr 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 21 | Oct 2023 – Apr 2026 | 11 mg/l 7 Apr 2026 |
| No flow /No sample 7668 | River water | 3 | Aug 2024 – May 2026 | No flow/discharge at sampling point 27 May 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 3 | Nov 2023 – Apr 2025 | below 0.0005 µg/l 30 Apr 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 3 | Nov 2023 – Apr 2025 | below 0.0005 µg/l 30 Apr 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 3 | Nov 2023 – Apr 2025 | below 0.0005 µg/l 30 Apr 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 3 | Nov 2023 – Apr 2025 | below 0.0005 µg/l 30 Apr 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 3 | Nov 2023 – Apr 2025 | below 0.0005 µg/l 30 Apr 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 3 | Nov 2023 – Apr 2025 | 0.018 µg/l 30 Apr 2025 |
| Perfluorobutanoic acid 2995 | River water | 3 | Nov 2023 – Apr 2025 | 0.031 µg/l 30 Apr 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 3 | Nov 2023 – Apr 2025 | 0.025 µg/l 30 Apr 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 3 | Nov 2023 – Apr 2025 | below 0.002 µg/l 30 Apr 2025 |
| Perfluorodecanoic acid 8892 | River water | 3 | Nov 2023 – Apr 2025 | 0.0021 µg/l 30 Apr 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 3 | Nov 2023 – Apr 2025 | below 0.005 µg/l 30 Apr 2025 |
| Perfluorododecanoic acid 8894 | River water | 3 | Nov 2023 – Apr 2025 | below 0.002 µg/l 30 Apr 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 3 | Nov 2023 – Apr 2025 | 0.015 µg/l 30 Apr 2025 |
| Perfluoroheptanoic acid 8889 | River water | 3 | Nov 2023 – Apr 2025 | 0.043 µg/l 30 Apr 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 3 | Nov 2023 – Apr 2025 | 0.37 µg/l 30 Apr 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 3 | Nov 2023 – Apr 2025 | 0.052 µg/l 30 Apr 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Mar 2024 – Apr 2025 | 0.31 µg/l 30 Apr 2025 |
| Perfluorohexanoic acid 8888 | River water | 3 | Nov 2023 – Apr 2025 | 0.11 µg/l 30 Apr 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 3 | Nov 2023 – Apr 2025 | 0.00054 µg/l 30 Apr 2025 |
| Perfluorononanoic acid 8891 | River water | 3 | Nov 2023 – Apr 2025 | 0.011 µg/l 30 Apr 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 3 | Nov 2023 – Apr 2025 | below 0.002 µg/l 30 Apr 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 3 | Nov 2023 – Apr 2025 | 0.018 µg/l 30 Apr 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Mar 2024 – Apr 2025 | 0.25 µg/l 30 Apr 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 3 | Nov 2023 – Apr 2025 | 0.7 µg/l 30 Apr 2025 |
| Perfluorooctanoic acid 8890 | River water | 3 | Nov 2023 – Apr 2025 | 0.11 µg/l 30 Apr 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 3 | Nov 2023 – Apr 2025 | 0.017 µg/l 30 Apr 2025 |
| Perfluoropentanoic acid 8887 | River water | 3 | Nov 2023 – Apr 2025 | 0.1 µg/l 30 Apr 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 3 | Nov 2023 – Apr 2025 | below 0.006 µg/l 30 Apr 2025 |
| Perfluorotridecanoic acid 2955 | River water | 3 | Nov 2023 – Apr 2025 | below 0.005 µg/l 30 Apr 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 3 | Nov 2023 – Apr 2025 | below 0.004 µg/l 30 Apr 2025 |
| Perfluoroundecanoic acid 8893 | River water | 3 | Nov 2023 – Apr 2025 | below 0.002 µg/l 30 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.