Tyelaw Burn at Houndean Mill, Warkworth
EA name: TYELAW BURN AT HOUNDEAN MILL, WARKWORTH
Environment Agency sampling point NE-42300086 · 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 May 2026, 12:535 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
- 24 since 21 Jun 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 423493, 606774As published, to the nearest 1 m. Open in a map
- River, by its own name
- Tyelaw Burn
- River, by the map
- Not placedIts name gives Tyelaw Burn; the only line close by, 5 m away, is Grange Burn 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) (24 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
114.4%
Sampled 1 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 12:53 | 114.4 | 114.4% |
| 8 Apr 2026, 09:32 | 104.8 | 104.8% |
| 3 Mar 2026, 11:32 | 97.6 | 97.6% |
| 4 Feb 2026, 10:16 | 98.1 | 98.1% |
| 8 Jan 2026, 11:42 | 101.8 | 101.8% |
| 1 Dec 2025, 11:20 | 101.4 | 101.4% |
| 5 Nov 2025, 11:12 | 97.3 | 97.3% |
| 3 Oct 2025, 09:47 | 96 | 96% |
| 5 Sep 2025, 11:04 | 95.4 | 95.4% |
| 4 Aug 2025, 11:14 | 97.8 | 97.8% |
| 8 Jul 2025, 11:10 | 96.7 | 96.7% |
| 4 Jun 2025, 12:44 | 99.7 | 99.7% |
| 6 May 2025, 10:49 | 101.7 | 101.7% |
| 1 Apr 2025, 11:20 | 110 | 110% |
| 3 Mar 2025, 09:33 | 100.5 | 100.5% |
| 3 Feb 2025, 10:34 | 100.7 | 100.7% |
| 20 Jan 2025, 11:58 | 100.3 | 100.3% |
| 5 Dec 2024, 10:19 | 100 | 100% |
| 21 Nov 2024, 09:58 | 99.4 | 99.4% |
| 14 Oct 2024, 10:31 | 99.7 | 99.7% |
| 18 Sep 2024, 10:05 | 97.3 | 97.3% |
| 23 Aug 2024, 09:39 | 98.9 | 98.9% |
| 16 Jul 2024, 10:50 | 101.6 | 101.6% |
| 21 Jun 2024, 09:43 | 95.2 | 95.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
12.6 mg/l
Sampled 1 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 12:53 | 12.6 | 12.6 mg/l |
| 8 Apr 2026, 09:32 | 12.2 | 12.2 mg/l |
| 3 Mar 2026, 11:32 | 12 | 12 mg/l |
| 4 Feb 2026, 10:16 | 12.4 | 12.4 mg/l |
| 8 Jan 2026, 11:42 | 13.7 | 13.7 mg/l |
| 1 Dec 2025, 11:20 | 12.2 | 12.2 mg/l |
| 5 Nov 2025, 11:12 | 10.7 | 10.7 mg/l |
| 3 Oct 2025, 09:47 | 10.3 | 10.3 mg/l |
| 5 Sep 2025, 11:04 | 10.1 | 10.1 mg/l |
| 4 Aug 2025, 11:14 | 10 | 10 mg/l |
| 8 Jul 2025, 11:10 | 10.1 | 10.1 mg/l |
| 4 Jun 2025, 12:44 | 10.9 | 10.9 mg/l |
| 6 May 2025, 10:49 | 11.9 | 11.9 mg/l |
| 1 Apr 2025, 11:20 | 13 | 13 mg/l |
| 3 Mar 2025, 09:33 | 12.4 | 12.4 mg/l |
| 3 Feb 2025, 10:34 | 12.8 | 12.8 mg/l |
| 20 Jan 2025, 11:58 | 12.8 | 12.8 mg/l |
| 5 Dec 2024, 10:19 | 11.9 | 11.9 mg/l |
| 21 Nov 2024, 09:58 | 13.9 | 13.9 mg/l |
| 14 Oct 2024, 10:31 | 12.1 | 12.1 mg/l |
| 18 Sep 2024, 10:05 | 10.9 | 10.9 mg/l |
| 23 Aug 2024, 09:39 | 10.4 | 10.4 mg/l |
| 16 Jul 2024, 10:50 | 10.7 | 10.7 mg/l |
| 21 Jun 2024, 09:43 | 10.1 | 10.1 mg/l |
Water temperature
code 0076 · °C
10.9 °C
Sampled 1 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 12:53 | 10.9 | 10.9 °C |
| 8 Apr 2026, 09:32 | 8.5 | 8.5 °C |
| 3 Mar 2026, 11:32 | 6.5 | 6.5 °C |
| 4 Feb 2026, 10:16 | 5.2 | 5.2 °C |
| 8 Jan 2026, 11:42 | 2.9 | 2.9 °C |
| 1 Dec 2025, 11:20 | 7.3 | 7.3 °C |
| 5 Nov 2025, 11:12 | 11 | 11 °C |
| 3 Oct 2025, 09:47 | 12.3 | 12.3 °C |
| 5 Sep 2025, 11:04 | 12.9 | 12.9 °C |
| 4 Aug 2025, 11:14 | 14.2 | 14.2 °C |
| 8 Jul 2025, 11:10 | 13.1 | 13.1 °C |
| 4 Jun 2025, 12:44 | 11.3 | 11.3 °C |
| 6 May 2025, 10:49 | 8.3 | 8.3 °C |
| 1 Apr 2025, 11:20 | 8.1 | 8.1 °C |
| 3 Mar 2025, 09:33 | 6.3 | 6.3 °C |
| 3 Feb 2025, 10:34 | 5.1 | 5.1 °C |
| 20 Jan 2025, 11:58 | 5.1 | 5.1 °C |
| 5 Dec 2024, 10:19 | 7.7 | 7.7 °C |
| 21 Nov 2024, 09:58 | 1.5 | 1.5 °C |
| 14 Oct 2024, 10:31 | 7.1 | 7.1 °C |
| 18 Sep 2024, 10:05 | 10.4 | 10.4 °C |
| 23 Aug 2024, 09:39 | 13 | 13 °C |
| 16 Jul 2024, 10:50 | 13 | 13 °C |
| 21 Jun 2024, 09:43 | 12.4 | 12.4 °C |
pH
code 0061
8.54
Sampled 1 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 12:53 | 8.54 | 8.54 |
| 8 Apr 2026, 09:32 | 8.44 | 8.44 |
| 3 Mar 2026, 11:32 | 7.84 | 7.84 |
| 4 Feb 2026, 10:16 | 7.99 | 7.99 |
| 8 Jan 2026, 11:42 | 8.08 | 8.08 |
| 1 Dec 2025, 11:20 | 7.22 | 7.22 |
| 5 Nov 2025, 11:12 | 8.02 | 8.02 |
| 3 Oct 2025, 09:47 | 8.12 | 8.12 |
| 5 Sep 2025, 11:04 | 8.29 | 8.29 |
| 4 Aug 2025, 11:14 | 8.51 | 8.51 |
| 8 Jul 2025, 11:10 | 8.26 | 8.26 |
| 4 Jun 2025, 12:44 | 8.52 | 8.52 |
| 6 May 2025, 10:49 | 8.32 | 8.32 |
| 1 Apr 2025, 11:20 | 8.29 | 8.29 |
| 3 Mar 2025, 09:33 | 8.31 | 8.31 |
| 3 Feb 2025, 10:34 | 8.26 | 8.26 |
| 20 Jan 2025, 11:58 | 8.23 | 8.23 |
| 5 Dec 2024, 10:19 | 7.99 | 7.99 |
| 21 Nov 2024, 09:58 | 8.38 | 8.38 |
| 14 Oct 2024, 10:31 | 8.19 | 8.19 |
| 18 Sep 2024, 10:05 | 8.48 | 8.48 |
| 23 Aug 2024, 09:39 | 7.45 | 7.45 |
| 16 Jul 2024, 10:50 | 8.26 | 8.26 |
| 21 Jun 2024, 09:43 | 8.31 | 8.31 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 1 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 12:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Apr 2026, 09:32 | 0.065 | 0.065 mg/l |
| 3 Mar 2026, 11:32 | 0.049 | 0.049 mg/l |
| 4 Feb 2026, 10:16 | 0.13 | 0.13 mg/l |
| 8 Jan 2026, 11:42 | 0.1 | 0.1 mg/l |
| 1 Dec 2025, 11:20 | 0.16 | 0.16 mg/l |
| 5 Nov 2025, 11:12 | 0.074 | 0.074 mg/l |
| 3 Oct 2025, 09:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Sep 2025, 11:04 | 0.059 | 0.059 mg/l |
| 4 Aug 2025, 11:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jul 2025, 11:10 | 0.039 | 0.039 mg/l |
| 4 Jun 2025, 12:44 | 0.04 | 0.04 mg/l |
| 6 May 2025, 10:49 | 0.043 | 0.043 mg/l |
| 1 Apr 2025, 11:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Mar 2025, 09:33 | 0.061 | 0.061 mg/l |
| 3 Feb 2025, 10:34 | 0.075 | 0.075 mg/l |
| 20 Jan 2025, 11:58 | 0.075 | 0.075 mg/l |
| 5 Dec 2024, 10:19 | 0.042 | 0.042 mg/l |
| 21 Nov 2024, 09:58 | 0.44 | 0.44 mg/l |
| 14 Oct 2024, 10:31 | 0.048 | 0.048 mg/l |
| 18 Sep 2024, 10:05 | 0.047 | 0.047 mg/l |
| 23 Aug 2024, 09:39 | 0.34 | 0.34 mg/l |
| 16 Jul 2024, 10:50 | 0.03 | 0.03 mg/l |
| 21 Jun 2024, 09:43 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
7.55 mg/l
Sampled 1 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 12:53 | 7.55 | 7.55 mg/l |
| 8 Apr 2026, 09:32 | 5.95 | 5.95 mg/l |
| 3 Mar 2026, 11:32 | 5.47 | 5.47 mg/l |
| 4 Feb 2026, 10:16 | 3.69 | 3.69 mg/l |
| 8 Jan 2026, 11:42 | 5.28 | 5.28 mg/l |
| 1 Dec 2025, 11:20 | 4.69 | 4.69 mg/l |
| 5 Nov 2025, 11:12 | 13 | 13 mg/l |
| 3 Oct 2025, 09:47 | 6.09 | 6.09 mg/l |
| 5 Sep 2025, 11:04 | 5.17 | 5.17 mg/l |
| 4 Aug 2025, 11:14 | 8.49 | 8.49 mg/l |
| 8 Jul 2025, 11:10 | 11 | 11 mg/l |
| 4 Jun 2025, 12:44 | 7.47 | 7.47 mg/l |
| 6 May 2025, 10:49 | 8.38 | 8.38 mg/l |
| 1 Apr 2025, 11:20 | 6.86 | 6.86 mg/l |
| 3 Mar 2025, 09:33 | 5.18 | 5.18 mg/l |
| 3 Feb 2025, 10:34 | 4.96 | 4.96 mg/l |
| 20 Jan 2025, 11:58 | 4.98 | 4.98 mg/l |
| 5 Dec 2024, 10:19 | 4.88 | 4.88 mg/l |
| 21 Nov 2024, 09:58 | 4.67 | 4.67 mg/l |
| 14 Oct 2024, 10:31 | 5.79 | 5.79 mg/l |
| 18 Sep 2024, 10:05 | 7.09 | 7.09 mg/l |
| 23 Aug 2024, 09:39 | 6.14 | 6.14 mg/l |
| 16 Jul 2024, 10:50 | 5.68 | 5.68 mg/l |
| 21 Jun 2024, 09:43 | 5.96 | 5.96 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.039 mg/l
Sampled 1 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 12:53 | 0.039 | 0.039 mg/l |
| 8 Apr 2026, 09:32 | 0.036 | 0.036 mg/l |
| 3 Mar 2026, 11:32 | 0.025 | 0.025 mg/l |
| 4 Feb 2026, 10:16 | 0.015 | 0.015 mg/l |
| 8 Jan 2026, 11:42 | 0.016 | 0.016 mg/l |
| 1 Dec 2025, 11:20 | 0.079 | 0.079 mg/l |
| 5 Nov 2025, 11:12 | 0.089 | 0.089 mg/l |
| 3 Oct 2025, 09:47 | 0.14 | 0.14 mg/l |
| 5 Sep 2025, 11:04 | 0.32 | 0.32 mg/l |
| 4 Aug 2025, 11:14 | 0.19 | 0.19 mg/l |
| 8 Jul 2025, 11:10 | 0.18 | 0.18 mg/l |
| 4 Jun 2025, 12:44 | 0.074 | 0.074 mg/l |
| 6 May 2025, 10:49 | 0.045 | 0.045 mg/l |
| 1 Apr 2025, 11:20 | 0.028 | 0.028 mg/l |
| 3 Mar 2025, 09:33 | 0.023 | 0.023 mg/l |
| 3 Feb 2025, 10:34 | 0.028 | 0.028 mg/l |
| 20 Jan 2025, 11:58 | 0.023 | 0.023 mg/l |
| 5 Dec 2024, 10:19 | 0.067 | 0.067 mg/l |
| 21 Nov 2024, 09:58 | 0.04 | 0.04 mg/l |
| 14 Oct 2024, 10:31 | 0.039 | 0.039 mg/l |
| 18 Sep 2024, 10:05 | 0.073 | 0.073 mg/l |
| 23 Aug 2024, 09:39 | 0.21 | 0.21 mg/l |
| 16 Jul 2024, 10:50 | 0.042 | 0.042 mg/l |
| 21 Jun 2024, 09:43 | 0.02 | 0.02 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
747 µS/cm
Sampled 1 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 May 2026, 12:53 | 747 | 747 µS/cm |
| 8 Apr 2026, 09:32 | 770 | 770 µS/cm |
| 3 Mar 2026, 11:32 | 835 | 835 µS/cm |
| 4 Feb 2026, 10:16 | 510 | 510 µS/cm |
| 8 Jan 2026, 11:42 | 642 | 642 µS/cm |
| 1 Dec 2025, 11:20 | 495 | 495 µS/cm |
| 5 Nov 2025, 11:12 | 640 | 640 µS/cm |
| 3 Oct 2025, 09:47 | 689 | 689 µS/cm |
| 5 Sep 2025, 11:04 | 583 | 583 µS/cm |
| 4 Aug 2025, 11:14 | 687 | 687 µS/cm |
| 8 Jul 2025, 11:10 | 724 | 724 µS/cm |
| 4 Jun 2025, 12:44 | 733 | 733 µS/cm |
| 6 May 2025, 10:49 | 769 | 769 µS/cm |
| 1 Apr 2025, 11:20 | 754 | 754 µS/cm |
| 3 Mar 2025, 09:33 | 706 | 706 µS/cm |
| 3 Feb 2025, 10:34 | 742 | 742 µS/cm |
| 20 Jan 2025, 11:58 | 767 | 767 µS/cm |
| 5 Dec 2024, 10:19 | 528 | 528 µS/cm |
| 21 Nov 2024, 09:58 | 748 | 748 µS/cm |
| 14 Oct 2024, 10:31 | 647 | 647 µS/cm |
| 18 Sep 2024, 10:05 | 738 | 738 µS/cm |
| 23 Aug 2024, 09:39 | 686 | 686 µS/cm |
| 16 Jul 2024, 10:50 | 672 | 672 µS/cm |
| 21 Jun 2024, 09:43 | 784 | 784 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 | 24 | Jun 2024 – May 2026 | 114.4% 1 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Jun 2024 – May 2026 | 12.6 mg/l 1 May 2026 |
| Temperature of Water 0076 | River water | 24 | Jun 2024 – May 2026 | 10.9 °C 1 May 2026 |
| pH 0061 | River water | 24 | Jun 2024 – May 2026 | 8.54 1 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Jun 2024 – May 2026 | below 0.03 mg/l 1 May 2026 |
| Nitrate as N 0117 | River water | 24 | Jun 2024 – May 2026 | 7.55 mg/l 1 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Jun 2024 – May 2026 | 0.039 mg/l 1 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Jun 2024 – May 2026 | 747 µS/cm 1 May 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 5 Dec 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 5 Dec 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 5 Dec 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 5 Dec 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 5 Dec 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Dec 2024 – Dec 2024 | below 0.004 µg/l 5 Dec 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Dec 2024 – Dec 2024 | below 0.005 µg/l 5 Dec 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 5 Dec 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 5 Dec 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Jun 2024 – May 2026 | 170 mg/l 1 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Jun 2024 – May 2026 | below 0.00058 mg/l 1 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – May 2026 | 1.9 mg/l 1 May 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 5 Dec 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 5 Dec 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 5 Dec 2024 |
| Nitrite as N 0118 | River water | 24 | Jun 2024 – May 2026 | 0.052 mg/l 1 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Jun 2024 – May 2026 | 7.6 mg/l 1 May 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Dec 2024 – Dec 2024 | 0.0015 µg/l 5 Dec 2024 |
| Perfluorobutanoic acid 2995 | River water | 1 | Dec 2024 – Dec 2024 | 0.0013 µg/l 5 Dec 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 5 Dec 2024 |
| Perfluorodecanoic acid 8892 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 5 Dec 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Dec 2024 – Dec 2024 | below 0.005 µg/l 5 Dec 2024 |
| Perfluorododecanoic acid 8894 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 5 Dec 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 5 Dec 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Perfluorohexanoic acid 8888 | River water | 1 | Dec 2024 – Dec 2024 | 0.00051 µg/l 5 Dec 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Perfluorononanoic acid 8891 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 5 Dec 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 5 Dec 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 5 Dec 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Perfluorooctanoic acid 8890 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 5 Dec 2024 |
| Perfluoropentanoic acid 8887 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 5 Dec 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Dec 2024 – Dec 2024 | below 0.006 µg/l 5 Dec 2024 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Dec 2024 – Dec 2024 | below 0.005 µg/l 5 Dec 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Dec 2024 – Dec 2024 | below 0.004 µg/l 5 Dec 2024 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 5 Dec 2024 |
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.