River Leith at Cliburn downstream of Weir
EA name: RIVER LEITH @ CLIBURN D/S WEIR
Environment Agency sampling point NW-88021261 · 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
- 2 Mar 2026, 12:227 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
- 23 since 3 May 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 359008, 524479As published, to the nearest 1 m. Open in a map
- River, by its own name
- Leith
- River, by the map
- River LeithPlaced on the river its name gives, 4 m from the line.
- Next gauge downstream
- Temple Sowerby On the River Eden · 7.9 km along the river
- Why it was sampled
- Monitoring (national agency policy) (23 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
99.2%
Sampled 2 Mar 2026, 7 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:22 | 99.2 | 99.2% |
| 4 Feb 2026, 14:57 | 101.4 | 101.4% |
| 6 Jan 2026, 11:52 | 100.9 | 100.9% |
| 3 Dec 2025, 10:55 | 99.1 | 99.1% |
| 5 Nov 2025, 10:41 | 97.4 | 97.4% |
| 3 Oct 2025, 13:04 | 96.5 | 96.5% |
| 11 Sep 2025, 15:35 | 122.7 | 122.7% |
| 15 Aug 2025, 13:52 | 116.6 | 116.6% |
| 17 Jul 2025, 10:55 | 108.2 | 108.2% |
| 3 Jun 2025, 08:00 | 79.8 | 79.8% |
| 6 May 2025, 10:54 | 105.4 | 105.4% |
| 8 Apr 2025, 11:35 | 108.7 | 108.7% |
| 13 Mar 2025, 09:35 | 102.1 | 102.1% |
| 7 Feb 2025, 12:52 | 99.7 | 99.7% |
| 21 Jan 2025, 10:17 | 100.2 | 100.2% |
| 4 Dec 2024, 10:02 | 101.3 | 101.3% |
| 20 Nov 2024, 13:39 | 104.5 | 104.5% |
| 23 Oct 2024, 10:44 | 98.5 | 98.5% |
| 19 Sep 2024, 13:33 | 124.2 | 124.2% |
| 30 Aug 2024, 08:39 | 97.5 | 97.5% |
| 16 Jul 2024, 14:45 | 113.9 | 113.9% |
| 17 Jun 2024, 11:25 | 109.1 | 109.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.7 mg/l
Sampled 2 Mar 2026, 7 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:22 | 11.7 | 11.7 mg/l |
| 4 Feb 2026, 14:57 | 12.8 | 12.8 mg/l |
| 6 Jan 2026, 11:52 | 14.2 | 14.2 mg/l |
| 3 Dec 2025, 10:55 | 11.8 | 11.8 mg/l |
| 5 Nov 2025, 10:41 | 10.6 | 10.6 mg/l |
| 3 Oct 2025, 13:04 | 10.4 | 10.4 mg/l |
| 11 Sep 2025, 15:35 | 12.6 | 12.6 mg/l |
| 15 Aug 2025, 13:52 | 11 | 11 mg/l |
| 17 Jul 2025, 10:55 | 10.5 | 10.5 mg/l |
| 3 Jun 2025, 08:00 | 8.58 | 8.58 mg/l |
| 6 May 2025, 10:54 | 12.1 | 12.1 mg/l |
| 8 Apr 2025, 11:35 | 12.9 | 12.9 mg/l |
| 13 Mar 2025, 09:35 | 13.2 | 13.2 mg/l |
| 7 Feb 2025, 12:52 | 12.7 | 12.7 mg/l |
| 21 Jan 2025, 10:17 | 12.5 | 12.5 mg/l |
| 4 Dec 2024, 10:02 | 12.6 | 12.6 mg/l |
| 20 Nov 2024, 13:39 | 13.2 | 13.2 mg/l |
| 23 Oct 2024, 10:44 | 11.1 | 11.1 mg/l |
| 19 Sep 2024, 13:33 | 13.1 | 13.1 mg/l |
| 30 Aug 2024, 08:39 | 10.7 | 10.7 mg/l |
| 16 Jul 2024, 14:45 | 11.3 | 11.3 mg/l |
| 17 Jun 2024, 11:25 | 11.5 | 11.5 mg/l |
Water temperature
code 0076 · °C
8.1 °C
Sampled 2 Mar 2026, 7 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:22 | 8.1 | 8.1 °C |
| 4 Feb 2026, 14:57 | 5.5 | 5.5 °C |
| 6 Jan 2026, 11:52 | 1.3 | 1.3 °C |
| 3 Dec 2025, 10:55 | 7.6 | 7.6 °C |
| 5 Nov 2025, 10:41 | 11.5 | 11.5 °C |
| 3 Oct 2025, 13:04 | 11.8 | 11.8 °C |
| 11 Sep 2025, 15:35 | 14 | 14 °C |
| 15 Aug 2025, 13:52 | 18 | 18 °C |
| 17 Jul 2025, 10:55 | 16.6 | 16.6 °C |
| 3 Jun 2025, 08:00 | 12 | 12 °C |
| 6 May 2025, 10:54 | 9.1 | 9.1 °C |
| 8 Apr 2025, 11:35 | 7.9 | 7.9 °C |
| 13 Mar 2025, 09:35 | 4.5 | 4.5 °C |
| 7 Feb 2025, 12:52 | 5.1 | 5.1 °C |
| 21 Jan 2025, 10:17 | 5.8 | 5.8 °C |
| 4 Dec 2024, 10:02 | 5.9 | 5.9 °C |
| 20 Nov 2024, 13:39 | 5.4 | 5.4 °C |
| 23 Oct 2024, 10:44 | 9.9 | 9.9 °C |
| 19 Sep 2024, 13:33 | 12.8 | 12.8 °C |
| 30 Aug 2024, 08:39 | 11.2 | 11.2 °C |
| 16 Jul 2024, 14:45 | 15.6 | 15.6 °C |
| 17 Jun 2024, 11:25 | 13 | 13 °C |
pH
code 0061
8.12
Sampled 2 Mar 2026, 7 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:22 | 8.12 | 8.12 |
| 4 Feb 2026, 14:57 | 8.3 | 8.3 |
| 6 Jan 2026, 11:52 | 8.23 | 8.23 |
| 3 Dec 2025, 10:55 | 8.23 | 8.23 |
| 5 Nov 2025, 10:41 | 8.04 | 8.04 |
| 3 Oct 2025, 13:04 | 8.48 | 8.48 |
| 11 Sep 2025, 15:35 | 8.34 | 8.34 |
| 15 Aug 2025, 13:52 | 8.02 | 8.02 |
| 17 Jul 2025, 10:55 | 8.06 | 8.06 |
| 3 Jun 2025, 08:00 | 7.59 | 7.59 |
| 6 May 2025, 10:54 | 7.91 | 7.91 |
| 8 Apr 2025, 11:35 | 8.12 | 8.12 |
| 13 Mar 2025, 09:35 | 8.33 | 8.33 |
| 7 Feb 2025, 12:52 | 8.31 | 8.31 |
| 21 Jan 2025, 10:17 | 8.17 | 8.17 |
| 4 Dec 2024, 10:02 | 8.39 | 8.39 |
| 20 Nov 2024, 13:39 | 8.07 | 8.07 |
| 23 Oct 2024, 10:44 | 8.21 | 8.21 |
| 19 Sep 2024, 13:33 | 8.23 | 8.23 |
| 30 Aug 2024, 08:39 | 8.21 | 8.21 |
| 16 Jul 2024, 14:45 | 8.32 | 8.32 |
| 17 Jun 2024, 11:25 | 8.09 | 8.09 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.023 mg/l
Sampled 2 Mar 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:22 | 0.023 | 0.023 mg/l |
| 4 Feb 2026, 14:57 | 0.017 | 0.017 mg/l |
| 3 Dec 2025, 10:55 | 0.12 | 0.12 mg/l |
| 5 Nov 2025, 10:41 | 0.045 | 0.045 mg/l |
| 3 Oct 2025, 13:04 | 0.014 | 0.014 mg/l |
| 11 Sep 2025, 15:35 | 0.008 | 0.008 mg/l |
| 15 Aug 2025, 13:52 | 0.029 | 0.029 mg/l |
| 17 Jul 2025, 10:55 | 0.014 | 0.014 mg/l |
| 3 Jun 2025, 08:00 | 0.055 | 0.055 mg/l |
| 6 May 2025, 10:54 | 0.0059 | 0.0059 mg/l |
| 8 Apr 2025, 11:35 | 0.011 | 0.011 mg/l |
| 13 Mar 2025, 09:35 | 0.015 | 0.015 mg/l |
| 7 Feb 2025, 12:52 | 0.013 | 0.013 mg/l |
| 21 Jan 2025, 10:17 | 0.022 | 0.022 mg/l |
| 4 Dec 2024, 10:02 | 0.02 | 0.02 mg/l |
| 20 Nov 2024, 13:39 | 0.033 | 0.033 mg/l |
| 23 Oct 2024, 10:44 | 0.011 | 0.011 mg/l |
| 19 Sep 2024, 13:33 | 0.018 | 0.018 mg/l |
| 30 Aug 2024, 08:39 | 0.014 | 0.014 mg/l |
| 16 Jul 2024, 14:45 | 0.02 | 0.02 mg/l |
| 17 Jun 2024, 11:25 | 0.042 | 0.042 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.39 mg/l
Sampled 2 Mar 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:22 | 2.39 | 2.39 mg/l |
| 4 Feb 2026, 14:57 | 3.19 | 3.19 mg/l |
| 3 Dec 2025, 10:55 | 2.99 | 2.99 mg/l |
| 5 Nov 2025, 10:41 | 2.59 | 2.59 mg/l |
| 3 Oct 2025, 13:04 | 2.59 | 2.59 mg/l |
| 11 Sep 2025, 15:35 | 1.89 | 1.89 mg/l |
| 15 Aug 2025, 13:52 | 1.79 | 1.79 mg/l |
| 17 Jul 2025, 10:55 | 1.69 | 1.69 mg/l |
| 3 Jun 2025, 08:00 | 2.47 | 2.47 mg/l |
| 6 May 2025, 10:54 | 2.69 | 2.69 mg/l |
| 8 Apr 2025, 11:35 | 2.49 | 2.49 mg/l |
| 13 Mar 2025, 09:35 | 2.9 | 2.9 mg/l |
| 7 Feb 2025, 12:52 | 2.6 | 2.6 mg/l |
| 21 Jan 2025, 10:17 | 2.8 | 2.8 mg/l |
| 4 Dec 2024, 10:02 | 2.4 | 2.4 mg/l |
| 20 Nov 2024, 13:39 | 2.8 | 2.8 mg/l |
| 23 Oct 2024, 10:44 | 2.2 | 2.2 mg/l |
| 19 Sep 2024, 13:33 | 2.19 | 2.19 mg/l |
| 30 Aug 2024, 08:39 | 1.8 | 1.8 mg/l |
| 16 Jul 2024, 14:45 | 2.09 | 2.09 mg/l |
| 17 Jun 2024, 11:25 | 2.28 | 2.28 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.055 mg/l
Sampled 2 Mar 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:22 | 0.055 | 0.055 mg/l |
| 4 Feb 2026, 14:57 | 0.035 | 0.035 mg/l |
| 3 Dec 2025, 10:55 | 0.094 | 0.094 mg/l |
| 5 Nov 2025, 10:41 | 0.063 | 0.063 mg/l |
| 3 Oct 2025, 13:04 | 0.059 | 0.059 mg/l |
| 11 Sep 2025, 15:35 | 0.015 | 0.015 mg/l |
| 15 Aug 2025, 13:52 | 0.013 | 0.013 mg/l |
| 17 Jul 2025, 10:55 | 0.0096 | 0.0096 mg/l |
| 3 Jun 2025, 08:00 | 0.0027 | 0.0027 mg/l |
| 6 May 2025, 10:54 | 0.0028 | 0.0028 mg/l |
| 8 Apr 2025, 11:35 | 0.0047 | 0.0047 mg/l |
| 13 Mar 2025, 09:35 | 0.014 | 0.014 mg/l |
| 7 Feb 2025, 12:52 | 0.031 | 0.031 mg/l |
| 21 Jan 2025, 10:17 | 0.037 | 0.037 mg/l |
| 4 Dec 2024, 10:02 | 0.043 | 0.043 mg/l |
| 20 Nov 2024, 13:39 | 0.026 | 0.026 mg/l |
| 23 Oct 2024, 10:44 | 0.054 | 0.054 mg/l |
| 19 Sep 2024, 13:33 | 0.0078 | 0.0078 mg/l |
| 30 Aug 2024, 08:39 | 0.031 | 0.031 mg/l |
| 16 Jul 2024, 14:45 | 0.04 | 0.04 mg/l |
| 17 Jun 2024, 11:25 | 0.04 | 0.04 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
429 µS/cm
Sampled 2 Mar 2026, 7 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 2 Mar 2026, 12:22 | 429 | 429 µS/cm |
| 4 Feb 2026, 14:57 | 571 | 571 µS/cm |
| 6 Jan 2026, 11:52 | 596 | 596 µS/cm |
| 3 Dec 2025, 10:55 | 470 | 470 µS/cm |
| 5 Nov 2025, 10:41 | 440 | 440 µS/cm |
| 3 Oct 2025, 13:04 | 525 | 525 µS/cm |
| 11 Sep 2025, 15:35 | 518 | 518 µS/cm |
| 15 Aug 2025, 13:52 | 500 | 500 µS/cm |
| 17 Jul 2025, 10:55 | 490 | 490 µS/cm |
| 3 Jun 2025, 08:00 | 560 | 560 µS/cm |
| 6 May 2025, 10:54 | 488 | 488 µS/cm |
| 8 Apr 2025, 11:35 | 510 | 510 µS/cm |
| 13 Mar 2025, 09:35 | 550 | 550 µS/cm |
| 7 Feb 2025, 12:52 | 577 | 577 µS/cm |
| 21 Jan 2025, 10:17 | 585 | 585 µS/cm |
| 4 Dec 2024, 10:02 | 565 | 565 µS/cm |
| 20 Nov 2024, 13:39 | 584 | 584 µS/cm |
| 23 Oct 2024, 10:44 | 529 | 529 µS/cm |
| 19 Sep 2024, 13:33 | 489 | 489 µS/cm |
| 30 Aug 2024, 08:39 | 540 | 540 µS/cm |
| 16 Jul 2024, 14:45 | 551 | 551 µS/cm |
| 17 Jun 2024, 11:25 | 514 | 514 µS/cm |
Everything measured here
60 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 60 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 22 | Jun 2024 – Mar 2026 | 99.2% 2 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | Jun 2024 – Mar 2026 | 11.7 mg/l 2 Mar 2026 |
| Temperature of Water 0076 | River water | 22 | Jun 2024 – Mar 2026 | 8.1 °C 2 Mar 2026 |
| pH 0061 | River water | 22 | Jun 2024 – Mar 2026 | 8.12 2 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 21 | Jun 2024 – Mar 2026 | 0.023 mg/l 2 Mar 2026 |
| Nitrate as N 0117 | River water | 21 | Jun 2024 – Mar 2026 | 2.39 mg/l 2 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 21 | Jun 2024 – Mar 2026 | 0.055 mg/l 2 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 22 | Jun 2024 – Mar 2026 | 429 µS/cm 2 Mar 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 4 | May 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 4 | May 2024 – Mar 2025 | below 0.004 µg/l 13 Mar 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 4 | May 2024 – Mar 2025 | below 0.005 µg/l 13 Mar 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 22 | Jun 2024 – Mar 2026 | 180 mg/l 2 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 21 | Jun 2024 – Mar 2026 | 0.00036 mg/l 2 Mar 2026 |
| BOD : 5 Day ATU 0085 | River water | 21 | Jun 2024 – Mar 2026 | 1.6 mg/l 2 Mar 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 4 | May 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 4 | May 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 2025 |
| Nitrite as N 0118 | River water | 21 | Jun 2024 – Mar 2026 | 0.0062 mg/l 2 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 21 | Jun 2024 – Mar 2026 | 2.4 mg/l 2 Mar 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| Perfluorobutanoic acid 2995 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 4 | May 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 2025 |
| Perfluorodecanoic acid 8892 | River water | 4 | May 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 4 | May 2024 – Mar 2025 | below 0.005 µg/l 13 Mar 2025 |
| Perfluorododecanoic acid 8894 | River water | 4 | May 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluoroheptanoic acid 8889 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluorohexanoic acid 8888 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluorononanoic acid 8891 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 4 | May 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluorooctanoic acid 8890 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 4 | May 2024 – Mar 2025 | below 0.0005 µg/l 13 Mar 2025 |
| Perfluoropentanoic acid 8887 | River water | 4 | May 2024 – Mar 2025 | below 0.001 µg/l 13 Mar 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 4 | May 2024 – Mar 2025 | below 0.006 µg/l 13 Mar 2025 |
| Perfluorotridecanoic acid 2955 | River water | 4 | May 2024 – Mar 2025 | below 0.005 µg/l 13 Mar 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 4 | May 2024 – Mar 2025 | below 0.004 µg/l 13 Mar 2025 |
| Perfluoroundecanoic acid 8893 | River water | 4 | May 2024 – Mar 2025 | below 0.002 µg/l 13 Mar 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.