Fossdyke upstream of sewage treatment works
EA name: FOSSDYKE U/S STW (also listed as “FOSSDYKE U/S OF STW”)
Environment Agency sampling point AN-FOSSDYK1 · 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
- 1 Jul 2026, 10:333 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 23 since 16 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 486986, 374466As published, to the nearest 1 m. Open in a map
- River, by its own name
- Fossdyke
- River, by the map
- Not placedIts name gives Fossdyke; the only line close by, 17 m away, is Fossdyke Navigation and is not traced into it. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (19 samples)
Planned investigation (local monitoring) (4 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
88.7%
Sampled 1 Jul 2026, 3 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Jul 2026, 10:33 | 88.7 | 88.7% |
| 12 Jun 2026, 14:18 | 84.6 | 84.6% |
| 12 Jun 2026, 13:34 | 135.9 | 135.9% |
| 5 Jun 2026, 09:30 | 75.8 | 75.8% |
| 8 May 2026, 09:10 | 149.6 | 149.6% |
| 6 Mar 2025, 10:07 | 95.3 | 95.3% |
| 13 Feb 2025, 11:11 | 76.2 | 76.2% |
| 24 Jan 2025, 10:39 | 73.3 | 73.3% |
| 5 Dec 2024, 10:29 | 72.7 | 72.7% |
| 19 Nov 2024, 12:15 | 86.6 | 86.6% |
| 15 Oct 2024, 11:19 | 64.4 | 64.4% |
| 17 Sep 2024, 11:48 | 106.5 | 106.5% |
| 19 Aug 2024, 09:15 | 71 | 71% |
| 18 Jul 2024, 09:35 | 90.5 | 90.5% |
| 17 Jun 2024, 12:48 | 187.7 | 187.7% |
| 16 May 2024, 10:36 | 152.6 | 152.6% |
| 17 Apr 2024, 11:47 | 98.6 | 98.6% |
| 18 Mar 2024, 10:07 | 95.1 | 95.1% |
| 20 Feb 2024, 10:11 | 83.1 | 83.1% |
| 15 Jan 2024, 11:22 | 65.3 | 65.3% |
| 5 Dec 2023, 09:55 | 70.4 | 70.4% |
| 22 Nov 2023, 11:08 | 61.5 | 61.5% |
| 16 Oct 2023, 12:45 | 68 | 68% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.56 mg/l
Sampled 1 Jul 2026, 3 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Jul 2026, 10:33 | 7.56 | 7.56 mg/l |
| 12 Jun 2026, 14:18 | 7.94 | 7.94 mg/l |
| 12 Jun 2026, 13:34 | 12.8 | 12.8 mg/l |
| 6 Mar 2025, 10:07 | 11.5 | 11.5 mg/l |
| 13 Feb 2025, 11:11 | 9.82 | 9.82 mg/l |
| 24 Jan 2025, 10:39 | 9.28 | 9.28 mg/l |
| 5 Dec 2024, 10:29 | 8.81 | 8.81 mg/l |
| 19 Nov 2024, 12:15 | 10.8 | 10.8 mg/l |
| 15 Oct 2024, 11:19 | 7.15 | 7.15 mg/l |
| 17 Sep 2024, 11:48 | 10.5 | 10.5 mg/l |
| 19 Aug 2024, 09:15 | 6.66 | 6.66 mg/l |
| 18 Jul 2024, 09:35 | 8.34 | 8.34 mg/l |
| 17 Jun 2024, 12:48 | 17.7 | 17.7 mg/l |
| 16 May 2024, 10:36 | 14.4 | 14.4 mg/l |
| 17 Apr 2024, 11:47 | 10.8 | 10.8 mg/l |
| 18 Mar 2024, 10:07 | 10.5 | 10.5 mg/l |
| 20 Feb 2024, 10:11 | 9.59 | 9.59 mg/l |
| 15 Jan 2024, 11:22 | 8.68 | 8.68 mg/l |
| 5 Dec 2023, 09:55 | 9.07 | 9.07 mg/l |
| 22 Nov 2023, 11:08 | 7.06 | 7.06 mg/l |
| 16 Oct 2023, 12:45 | 7.3 | 7.3 mg/l |
Water temperature
code 0076 · °C
23.2 °C
Sampled 1 Jul 2026, 3 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Jul 2026, 10:33 | 23.2 | 23.2 °C |
| 12 Jun 2026, 14:18 | 18.3 | 18.3 °C |
| 12 Jun 2026, 13:34 | 18.1 | 18.1 °C |
| 5 Jun 2026, 09:30 | 15.6 | 15.6 °C |
| 8 May 2026, 09:10 | 12.8 | 12.8 °C |
| 6 Mar 2025, 10:07 | 7.1 | 7.1 °C |
| 13 Feb 2025, 11:11 | 4.6 | 4.6 °C |
| 24 Jan 2025, 10:39 | 5.3 | 5.3 °C |
| 5 Dec 2024, 10:29 | 7 | 7 °C |
| 19 Nov 2024, 12:15 | 5.7 | 5.7 °C |
| 15 Oct 2024, 11:19 | 10.6 | 10.6 °C |
| 17 Sep 2024, 11:48 | 16.1 | 16.1 °C |
| 19 Aug 2024, 09:15 | 18.3 | 18.3 °C |
| 18 Jul 2024, 09:35 | 19.2 | 19.2 °C |
| 17 Jun 2024, 12:48 | 18.2 | 18.2 °C |
| 16 May 2024, 10:36 | 17.9 | 17.9 °C |
| 17 Apr 2024, 11:47 | 11.2 | 11.2 °C |
| 18 Mar 2024, 10:07 | 10.7 | 10.7 °C |
| 20 Feb 2024, 10:11 | 9 | 9 °C |
| 15 Jan 2024, 11:22 | 3.4 | 3.4 °C |
| 5 Dec 2023, 09:55 | 4.6 | 4.6 °C |
| 22 Nov 2023, 11:08 | 9.2 | 9.2 °C |
| 16 Oct 2023, 12:45 | 12.1 | 12.1 °C |
pH
code 0061
8.12
Sampled 1 Jul 2026, 3 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Jul 2026, 10:33 | 8.12 | 8.12 |
| 12 Jun 2026, 14:18 | 7.93 | 7.93 |
| 12 Jun 2026, 13:34 | 8.64 | 8.64 |
| 6 Mar 2025, 10:07 | 7.64 | 7.64 |
| 13 Feb 2025, 11:11 | 7.63 | 7.63 |
| 24 Jan 2025, 10:39 | 7.42 | 7.42 |
| 5 Dec 2024, 10:29 | 7.45 | 7.45 |
| 19 Nov 2024, 12:15 | 7.77 | 7.77 |
| 15 Oct 2024, 11:19 | 7.42 | 7.42 |
| 17 Sep 2024, 11:48 | 8.29 | 8.29 |
| 19 Aug 2024, 09:15 | 7.95 | 7.95 |
| 18 Jul 2024, 09:35 | 7.76 | 7.76 |
| 17 Jun 2024, 12:48 | 8.79 | 8.79 |
| 16 May 2024, 10:36 | 8.54 | 8.54 |
| 17 Apr 2024, 11:47 | 8.13 | 8.13 |
| 18 Mar 2024, 10:07 | 7.95 | 7.95 |
| 20 Feb 2024, 10:11 | 7.6 | 7.6 |
| 15 Jan 2024, 11:22 | 7.46 | 7.46 |
| 5 Dec 2023, 09:55 | 7.46 | 7.46 |
| 22 Nov 2023, 11:08 | 7.46 | 7.46 |
| 16 Oct 2023, 12:45 | 7.83 | 7.83 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 6 Mar 2025, 19 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2025, 10:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Feb 2025, 11:11 | 0.18 | 0.18 mg/l |
| 24 Jan 2025, 10:39 | 0.25 | 0.25 mg/l |
| 5 Dec 2024, 10:29 | 0.082 | 0.082 mg/l |
| 19 Nov 2024, 12:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Oct 2024, 11:19 | 0.27 | 0.27 mg/l |
| 17 Sep 2024, 11:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Aug 2024, 09:15 | 0.1 | 0.1 mg/l |
| 18 Jul 2024, 09:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jun 2024, 12:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 May 2024, 10:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Apr 2024, 11:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Mar 2024, 10:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Feb 2024, 10:11 | 0.079 | 0.079 mg/l |
| 15 Jan 2024, 11:22 | 0.19 | 0.19 mg/l |
| 5 Dec 2023, 09:55 | 0.11 | 0.11 mg/l |
| 22 Nov 2023, 11:08 | 0.24 | 0.24 mg/l |
| 16 Oct 2023, 12:45 | 0.096 | 0.096 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
4.09 mg/l
Sampled 6 Mar 2025, 19 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2025, 10:07 | 4.09 | 4.09 mg/l |
| 13 Feb 2025, 11:11 | 2.98 | 2.98 mg/l |
| 24 Jan 2025, 10:39 | 2.88 | 2.88 mg/l |
| 5 Dec 2024, 10:29 | 5.77 | 5.77 mg/l |
| 19 Nov 2024, 12:15 | 5.62 | 5.62 mg/l |
| 15 Oct 2024, 11:19 | 9.57 | 9.57 mg/l |
| 17 Sep 2024, 11:48 | 6.08 | 6.08 mg/l |
| 19 Aug 2024, 09:15 | 0.237 | 0.237 mg/l |
| 18 Jul 2024, 09:35 | 1.17 | 1.17 mg/l |
| 17 Jun 2024, 12:48 | 3.55 | 3.55 mg/l |
| 16 May 2024, 10:36 | 7.38 | 7.38 mg/l |
| 17 Apr 2024, 11:47 | 2.59 | 2.59 mg/l |
| 18 Mar 2024, 10:07 | 3.48 | 3.48 mg/l |
| 20 Feb 2024, 10:11 | 6.57 | 6.57 mg/l |
| 15 Jan 2024, 11:22 | 4.07 | 4.07 mg/l |
| 5 Dec 2023, 09:55 | 7.84 | 7.84 mg/l |
| 22 Nov 2023, 11:08 | 2.35 | 2.35 mg/l |
| 16 Oct 2023, 12:45 | 5.11 | 5.11 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.015 mg/l
Sampled 6 Mar 2025, 19 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2025, 10:07 | 0.015 | 0.015 mg/l |
| 13 Feb 2025, 11:11 | 0.021 | 0.021 mg/l |
| 24 Jan 2025, 10:39 | 0.016 | 0.016 mg/l |
| 5 Dec 2024, 10:29 | 0.025 | 0.025 mg/l |
| 19 Nov 2024, 12:15 | 0.38 | 0.38 mg/l |
| 15 Oct 2024, 11:19 | 0.4 | 0.4 mg/l |
| 17 Sep 2024, 11:48 | 0.069 | 0.069 mg/l |
| 19 Aug 2024, 09:15 | 0.14 | 0.14 mg/l |
| 18 Jul 2024, 09:35 | 0.11 | 0.11 mg/l |
| 17 Jun 2024, 12:48 | 0.08 | 0.08 mg/l |
| 16 May 2024, 10:36 | 0.18 | 0.18 mg/l |
| 17 Apr 2024, 11:47 | 0.028 | 0.028 mg/l |
| 18 Mar 2024, 10:07 | 0.044 | 0.044 mg/l |
| 20 Feb 2024, 10:11 | 0.075 | 0.075 mg/l |
| 15 Jan 2024, 11:22 | 0.048 | 0.048 mg/l |
| 5 Dec 2023, 09:55 | 0.049 | 0.049 mg/l |
| 22 Nov 2023, 11:08 | 0.015 | 0.015 mg/l |
| 16 Oct 2023, 12:45 | 0.24 | 0.24 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
783 µS/cm
Sampled 1 Jul 2026, 3 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Jul 2026, 10:33 | 783 | 783 µS/cm |
| 12 Jun 2026, 14:18 | 759 | 759 µS/cm |
| 12 Jun 2026, 13:34 | 380 | 380 µS/cm |
| 6 Mar 2025, 10:07 | 873 | 873 µS/cm |
| 13 Feb 2025, 11:11 | 864 | 864 µS/cm |
| 24 Jan 2025, 10:39 | 855 | 855 µS/cm |
| 5 Dec 2024, 10:29 | 816 | 816 µS/cm |
| 19 Nov 2024, 12:15 | 921 | 921 µS/cm |
| 15 Oct 2024, 11:19 | 782 | 782 µS/cm |
| 17 Sep 2024, 11:48 | 950 | 950 µS/cm |
| 19 Aug 2024, 09:15 | 765 | 765 µS/cm |
| 18 Jul 2024, 09:35 | 777 | 777 µS/cm |
| 17 Jun 2024, 12:48 | 753 | 753 µS/cm |
| 16 May 2024, 10:36 | 810 | 810 µS/cm |
| 17 Apr 2024, 11:47 | 900 | 900 µS/cm |
| 18 Mar 2024, 10:07 | 793 | 793 µS/cm |
| 20 Feb 2024, 10:11 | 491 | 491 µS/cm |
| 15 Jan 2024, 11:22 | 718 | 718 µS/cm |
| 5 Dec 2023, 09:55 | 842 | 842 µS/cm |
| 22 Nov 2023, 11:08 | 910 | 910 µS/cm |
| 16 Oct 2023, 12:45 | 820 | 820 µS/cm |
Everything measured here
78 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 78 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 23 | Oct 2023 – Jul 2026 | 88.7% 1 Jul 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 21 | Oct 2023 – Jul 2026 | 7.56 mg/l 1 Jul 2026 |
| Temperature of Water 0076 | River water | 23 | Oct 2023 – Jul 2026 | 23.2 °C 1 Jul 2026 |
| pH 0061 | River water | 21 | Oct 2023 – Jul 2026 | 8.12 1 Jul 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 18 | Oct 2023 – Mar 2025 | below 0.03 mg/l 6 Mar 2025 |
| Nitrate as N 0117 | River water | 18 | Oct 2023 – Mar 2025 | 4.09 mg/l 6 Mar 2025 |
| Orthophosphate, reactive as P 0180 | River water | 18 | Oct 2023 – Mar 2025 | 0.015 mg/l 6 Mar 2025 |
| Conductivity at 25 C 0077 | River water | 21 | Oct 2023 – Jul 2026 | 783 µS/cm 1 Jul 2026 |
| (Perfluorohexanesulfonyl)[3-(trimethylazaniumyl)propyl]azanide 2890 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| 10:2 Fluorotelomer sulfonic acid 2994 | River water | 3 | May 2026 – Jul 2026 | below 0.002 µg/l 1 Jul 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 3 | May 2026 – Jul 2026 | below 0.001 µg/l 1 Jul 2026 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 3 | May 2026 – Jul 2026 | below 0.001 µg/l 1 Jul 2026 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 3 | May 2026 – Jul 2026 | below 0.001 µg/l 1 Jul 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 3 | May 2026 – Jul 2026 | below 0.001 µg/l 1 Jul 2026 |
| 2H-Perfluoro-2-decenoic acid 2888 | River water | 3 | May 2026 – Jul 2026 | below 0.001 µg/l 1 Jul 2026 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 3 | May 2026 – Jul 2026 | below 0.004 µg/l 1 Jul 2026 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 3 | May 2026 – Jul 2026 | below 0.001 µg/l 1 Jul 2026 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| 5:1:2 Fluorotelomer betaine 2887 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| 5:3 Fluorotelomer betaine 2886 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| 6:2 Fluorotelomer phosphate diester 2986 | River water | 3 | May 2026 – Jul 2026 | below 0.004 µg/l 1 Jul 2026 |
| 6:2 Fluorotelomer sulfonamide amine oxide (6:2 FTNO) (Capstone A) 2841 | River water | 3 | May 2026 – Jul 2026 | below 0.001 µg/l 1 Jul 2026 |
| 6:2 Fluorotelomer sulfonamide betaine 2985 | River water | 3 | May 2026 – Jul 2026 | 0.087 µg/l 1 Jul 2026 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 3 | May 2026 – Jul 2026 | 0.0011 µg/l 1 Jul 2026 |
| 6:2/8:2 Fluorotelomer phosphate diester 2884 | River water | 3 | May 2026 – Jul 2026 | below 0.01 µg/l 1 Jul 2026 |
| 6:6 Perfluorophosphinic acid 2883 | River water | 3 | May 2026 – Jul 2026 | below 0.004 µg/l 1 Jul 2026 |
| 6:8 Perfluorophosphinic acid 2882 | River water | 3 | May 2026 – Jul 2026 | below 0.01 µg/l 1 Jul 2026 |
| 8:2 Fluorotelomer phosphate diester 2880 | River water | 3 | May 2026 – Jul 2026 | below 0.004 µg/l 1 Jul 2026 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 3 | May 2026 – Jul 2026 | below 0.001 µg/l 1 Jul 2026 |
| 8:8 Perfluorophosphinic acid 2879 | River water | 3 | May 2026 – Jul 2026 | below 0.01 µg/l 1 Jul 2026 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 18 | Oct 2023 – Mar 2025 | 270 mg/l 6 Mar 2025 |
| Ammonia un-ionised as N 0119 | River water | 18 | Oct 2023 – Mar 2025 | below 0.00019 mg/l 6 Mar 2025 |
| BOD : 5 Day ATU 0085 | River water | 14 | Feb 2024 – Mar 2025 | 1.3 mg/l 6 Mar 2025 |
| Flow Type 2896 | River water | 3 | Jun 2026 – Jul 2026 | Moderate Flow 1 Jul 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 3 | May 2026 – Jul 2026 | below 0.001 µg/l 1 Jul 2026 |
| Hexafluoropropylene oxide trimer acid 2980 | River water | 3 | May 2026 – Jul 2026 | below 0.001 µg/l 1 Jul 2026 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 3 | May 2026 – Jul 2026 | below 0.002 µg/l 1 Jul 2026 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 3 | May 2026 – Jul 2026 | below 0.002 µg/l 1 Jul 2026 |
| National Grid Reference : Whole : Field report 7434 | River water | 2 | May 2026 – Jun 2026 | 1 unitless value 5 Jun 2026 |
| Nitrite as N 0118 | River water | 18 | Oct 2023 – Mar 2025 | 0.013 mg/l 6 Mar 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 18 | Oct 2023 – Mar 2025 | 4.1 mg/l 6 Mar 2025 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| Perfluorobutanesulfonic acid 2972 | River water | 3 | May 2026 – Jul 2026 | 0.0028 µg/l 1 Jul 2026 |
| Perfluorobutanoic acid 2995 | River water | 3 | May 2026 – Jul 2026 | 0.0058 µg/l 1 Jul 2026 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 3 | May 2026 – Jul 2026 | 0.0012 µg/l 1 Jul 2026 |
| Perfluorodecanesulfonic acid 2969 | River water | 3 | May 2026 – Jul 2026 | below 0.001 µg/l 1 Jul 2026 |
| Perfluorodecanoic acid 8892 | River water | 3 | May 2026 – Jul 2026 | below 0.001 µg/l 1 Jul 2026 |
| Perfluorododecane sulfonic acid 2968 | River water | 3 | May 2026 – Jul 2026 | below 0.005 µg/l 1 Jul 2026 |
| Perfluorododecanoic acid 8894 | River water | 3 | May 2026 – Jul 2026 | below 0.002 µg/l 1 Jul 2026 |
| Perfluoroheptanesulfonic acid 2967 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| Perfluoroheptanoic acid 8889 | River water | 3 | May 2026 – Jul 2026 | 0.0021 µg/l 1 Jul 2026 |
| Perfluorohexane sulfonamido amine 2874 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| Perfluorohexanesulfonamide 2965 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 3 | May 2026 – Jul 2026 | 0.0019 µg/l 1 Jul 2026 |
| Perfluorohexanoic acid 8888 | River water | 3 | May 2026 – Jul 2026 | 0.0059 µg/l 1 Jul 2026 |
| Perfluorononanesulfonic acid 2963 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| Perfluorononanoic acid 8891 | River water | 3 | May 2026 – Jul 2026 | below 0.001 µg/l 1 Jul 2026 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jun 2026 – Jul 2026 | below 0.002 µg/l 1 Jul 2026 |
| Perfluorooctanesulfonamide 2961 | River water | 3 | May 2026 – Jul 2026 | below 0.001 µg/l 1 Jul 2026 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 3 | May 2026 – Jul 2026 | 0.0013 µg/l 1 Jul 2026 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 3 | May 2026 – Jul 2026 | 0.0021 µg/l 1 Jul 2026 |
| Perfluorooctanesulfonic acid (total) 2958 | River water | 3 | May 2026 – Jul 2026 | 0.0034 µg/l 1 Jul 2026 |
| Perfluorooctanoic acid 8890 | River water | 3 | May 2026 – Jul 2026 | 0.0026 µg/l 1 Jul 2026 |
| Perfluoropentanesulfonic acid 2957 | River water | 3 | May 2026 – Jul 2026 | below 0.0005 µg/l 1 Jul 2026 |
| Perfluoropentanoic acid 8887 | River water | 3 | May 2026 – Jul 2026 | 0.0061 µg/l 1 Jul 2026 |
| Perfluorotetradecanoic acid 8895 | River water | 3 | May 2026 – Jul 2026 | below 0.006 µg/l 1 Jul 2026 |
| Perfluorotridecanoic acid 2955 | River water | 3 | May 2026 – Jul 2026 | below 0.002 µg/l 1 Jul 2026 |
| Perfluoroundecane sulfonic acid 2953 | River water | 3 | May 2026 – Jul 2026 | below 0.004 µg/l 1 Jul 2026 |
| Perfluoroundecanoic acid 8893 | River water | 3 | May 2026 – Jul 2026 | below 0.001 µg/l 1 Jul 2026 |
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.