Paxtondean Burn upstream of Longhorsley sewage treatment works
EA name: PAXTONDEAN BURN U/S LONGHORSLEY STW
Environment Agency sampling point NE-42300051 · 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 May 2026, 11:534 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
- 27 since 2 Nov 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 415365, 594210As published, to the nearest 1 m. Open in a map
- River, by its own name
- Paxtondean Burn
- River, by the map
- Paxtondean BurnPlaced on the river its name gives, 4 m from the line.
- Next gauge downstream
- Warkworth On the River Coquet · 31 km along the river
- Why it was sampled
- Monitoring (national agency policy) (27 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
105.2%
Sampled 18 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 11:53 | 105.2 | 105.2% |
| 1 May 2026, 08:27 | 100.1 | 100.1% |
| 13 Apr 2026, 12:54 | 108.5 | 108.5% |
| 7 Apr 2026, 16:06 | 100.6 | 100.6% |
| 16 Mar 2026, 09:49 | 100.2 | 100.2% |
| 3 Mar 2026, 09:55 | 96.1 | 96.1% |
| 16 Feb 2026, 09:28 | 95.3 | 95.3% |
| 3 Feb 2026, 09:26 | 96.3 | 96.3% |
| 19 Jan 2026, 12:11 | 98.9 | 98.9% |
| 7 Jan 2026, 12:55 | 97.9 | 97.9% |
| 15 Dec 2025, 11:11 | 98.4 | 98.4% |
| 1 Dec 2025, 09:11 | 98.9 | 98.9% |
| 17 Nov 2025, 10:53 | 96.1 | 96.1% |
| 5 Nov 2025, 08:32 | 93.3 | 93.3% |
| 3 Oct 2025, 13:47 | 91.7 | 91.7% |
| 3 Sep 2025, 11:34 | 96.3 | 96.3% |
| 5 Aug 2025, 08:47 | 90.6 | 90.6% |
| 4 Jul 2025, 10:45 | 95.6 | 95.6% |
| 3 Jun 2025, 12:28 | 107.2 | 107.2% |
| 6 May 2025, 12:38 | 112.9 | 112.9% |
| 1 Apr 2025, 08:19 | 96.7 | 96.7% |
| 3 Mar 2025, 13:27 | 102.8 | 102.8% |
| 4 Feb 2025, 09:23 | 99.1 | 99.1% |
| 21 Jan 2025, 12:36 | 101.5 | 101.5% |
| 10 Dec 2024, 10:04 | 100.4 | 100.4% |
| 4 Dec 2024, 10:31 | 99.2 | 99.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.8 mg/l
Sampled 18 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 11:53 | 11.8 | 11.8 mg/l |
| 1 May 2026, 08:27 | 12 | 12 mg/l |
| 13 Apr 2026, 12:54 | 12.8 | 12.8 mg/l |
| 7 Apr 2026, 16:06 | 11.3 | 11.3 mg/l |
| 16 Mar 2026, 09:49 | 12.8 | 12.8 mg/l |
| 3 Mar 2026, 09:55 | 12.1 | 12.1 mg/l |
| 16 Feb 2026, 09:28 | 12.3 | 12.3 mg/l |
| 3 Feb 2026, 09:26 | 12.3 | 12.3 mg/l |
| 19 Jan 2026, 12:11 | 12.6 | 12.6 mg/l |
| 7 Jan 2026, 12:55 | 13 | 13 mg/l |
| 15 Dec 2025, 11:11 | 11.6 | 11.6 mg/l |
| 1 Dec 2025, 09:11 | 12.1 | 12.1 mg/l |
| 17 Nov 2025, 10:53 | 11.7 | 11.7 mg/l |
| 5 Nov 2025, 08:32 | 10.3 | 10.3 mg/l |
| 3 Oct 2025, 13:47 | 9.88 | 9.88 mg/l |
| 3 Sep 2025, 11:34 | 10.2 | 10.2 mg/l |
| 5 Aug 2025, 08:47 | 9.61 | 9.61 mg/l |
| 4 Jul 2025, 10:45 | 9.98 | 9.98 mg/l |
| 3 Jun 2025, 12:28 | 11.3 | 11.3 mg/l |
| 6 May 2025, 12:38 | 12.6 | 12.6 mg/l |
| 1 Apr 2025, 08:19 | 11.9 | 11.9 mg/l |
| 3 Mar 2025, 13:27 | 12.4 | 12.4 mg/l |
| 4 Feb 2025, 09:23 | 12.2 | 12.2 mg/l |
| 21 Jan 2025, 12:36 | 12.9 | 12.9 mg/l |
| 10 Dec 2024, 10:04 | 12.3 | 12.3 mg/l |
| 4 Dec 2024, 10:31 | 12.5 | 12.5 mg/l |
Water temperature
code 0076 · °C
10.1 °C
Sampled 18 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 11:53 | 10.1 | 10.1 °C |
| 1 May 2026, 08:27 | 7.4 | 7.4 °C |
| 13 Apr 2026, 12:54 | 8 | 8 °C |
| 7 Apr 2026, 16:06 | 10.1 | 10.1 °C |
| 16 Mar 2026, 09:49 | 4.9 | 4.9 °C |
| 3 Mar 2026, 09:55 | 5.5 | 5.5 °C |
| 16 Feb 2026, 09:28 | 4.7 | 4.7 °C |
| 3 Feb 2026, 09:26 | 5 | 5 °C |
| 19 Jan 2026, 12:11 | 5 | 5 °C |
| 7 Jan 2026, 12:55 | 3.4 | 3.4 °C |
| 15 Dec 2025, 11:11 | 8.3 | 8.3 °C |
| 1 Dec 2025, 09:11 | 6.7 | 6.7 °C |
| 17 Nov 2025, 10:53 | 6.8 | 6.8 °C |
| 5 Nov 2025, 08:32 | 10.8 | 10.8 °C |
| 3 Oct 2025, 13:47 | 11.9 | 11.9 °C |
| 3 Sep 2025, 11:34 | 12.8 | 12.8 °C |
| 5 Aug 2025, 08:47 | 12.6 | 12.6 °C |
| 4 Jul 2025, 10:45 | 13.3 | 13.3 °C |
| 3 Jun 2025, 12:28 | 12.7 | 12.7 °C |
| 6 May 2025, 12:38 | 10.5 | 10.5 °C |
| 1 Apr 2025, 08:19 | 6.5 | 6.5 °C |
| 3 Mar 2025, 13:27 | 7.1 | 7.1 °C |
| 4 Feb 2025, 09:23 | 6.4 | 6.4 °C |
| 21 Jan 2025, 12:36 | 5 | 5 °C |
| 10 Dec 2024, 10:04 | 6.5 | 6.5 °C |
| 4 Dec 2024, 10:31 | 5.6 | 5.6 °C |
pH
code 0061
8.61
Sampled 18 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 11:53 | 8.61 | 8.61 |
| 1 May 2026, 08:27 | 8.04 | 8.04 |
| 13 Apr 2026, 12:54 | 8.07 | 8.07 |
| 7 Apr 2026, 16:06 | 8.16 | 8.16 |
| 16 Mar 2026, 09:49 | 8.05 | 8.05 |
| 3 Mar 2026, 09:55 | 7.97 | 7.97 |
| 16 Feb 2026, 09:28 | 7.79 | 7.79 |
| 3 Feb 2026, 09:26 | 7.78 | 7.78 |
| 19 Jan 2026, 12:11 | 7.7 | 7.7 |
| 7 Jan 2026, 12:55 | 7.97 | 7.97 |
| 15 Dec 2025, 11:11 | 7.83 | 7.83 |
| 1 Dec 2025, 09:11 | 7.72 | 7.72 |
| 17 Nov 2025, 10:53 | 8.08 | 8.08 |
| 5 Nov 2025, 08:32 | 7.67 | 7.67 |
| 3 Oct 2025, 13:47 | 7.76 | 7.76 |
| 3 Sep 2025, 11:34 | 8.12 | 8.12 |
| 5 Aug 2025, 08:47 | 8.07 | 8.07 |
| 4 Jul 2025, 10:45 | 7.93 | 7.93 |
| 3 Jun 2025, 12:28 | 8.35 | 8.35 |
| 6 May 2025, 12:38 | 8.26 | 8.26 |
| 1 Apr 2025, 08:19 | 8.09 | 8.09 |
| 3 Mar 2025, 13:27 | 8.21 | 8.21 |
| 4 Feb 2025, 09:23 | 8.09 | 8.09 |
| 21 Jan 2025, 12:36 | 8.25 | 8.25 |
| 10 Dec 2024, 10:04 | 7.84 | 7.84 |
| 4 Dec 2024, 10:31 | 7.95 | 7.95 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 18 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 11:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 May 2026, 08:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Apr 2026, 12:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Mar 2026, 09:49 | 0.072 | 0.072 mg/l |
| 3 Mar 2026, 09:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Feb 2026, 09:28 | 0.063 | 0.063 mg/l |
| 3 Feb 2026, 09:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Jan 2026, 12:11 | 0.038 | 0.038 mg/l |
| 7 Jan 2026, 12:55 | 0.068 | 0.068 mg/l |
| 15 Dec 2025, 11:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Dec 2025, 09:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Nov 2025, 10:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Nov 2025, 08:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Oct 2025, 13:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Sep 2025, 11:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Aug 2025, 08:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Jul 2025, 10:45 | 0.06 | 0.06 mg/l |
| 3 Jun 2025, 12:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 May 2025, 12:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Apr 2025, 08:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Mar 2025, 13:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2025, 09:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Jan 2025, 12:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Dec 2024, 10:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Dec 2024, 10:31 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.89 mg/l
Sampled 18 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 11:53 | 2.89 | 2.89 mg/l |
| 1 May 2026, 08:27 | 3 | 3 mg/l |
| 13 Apr 2026, 12:54 | 2.8 | 2.8 mg/l |
| 16 Mar 2026, 09:49 | 1.99 | 1.99 mg/l |
| 3 Mar 2026, 09:55 | 2.6 | 2.6 mg/l |
| 16 Feb 2026, 09:28 | 2.1 | 2.1 mg/l |
| 3 Feb 2026, 09:26 | 2 | 2 mg/l |
| 19 Jan 2026, 12:11 | 2.79 | 2.79 mg/l |
| 7 Jan 2026, 12:55 | 1.99 | 1.99 mg/l |
| 15 Dec 2025, 11:11 | 1.9 | 1.9 mg/l |
| 1 Dec 2025, 09:11 | 1.3 | 1.3 mg/l |
| 17 Nov 2025, 10:53 | 2.59 | 2.59 mg/l |
| 5 Nov 2025, 08:32 | 4.39 | 4.39 mg/l |
| 3 Oct 2025, 13:47 | 2.4 | 2.4 mg/l |
| 3 Sep 2025, 11:34 | 3.7 | 3.7 mg/l |
| 5 Aug 2025, 08:47 | 2.9 | 2.9 mg/l |
| 4 Jul 2025, 10:45 | 2.48 | 2.48 mg/l |
| 3 Jun 2025, 12:28 | 3.09 | 3.09 mg/l |
| 6 May 2025, 12:38 | 2.99 | 2.99 mg/l |
| 1 Apr 2025, 08:19 | 2.6 | 2.6 mg/l |
| 3 Mar 2025, 13:27 | 2.1 | 2.1 mg/l |
| 4 Feb 2025, 09:23 | 2.2 | 2.2 mg/l |
| 21 Jan 2025, 12:36 | 2.2 | 2.2 mg/l |
| 10 Dec 2024, 10:04 | 2.8 | 2.8 mg/l |
| 4 Dec 2024, 10:31 | 1.39 | 1.39 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.015 mg/l
Sampled 18 May 2026, 4 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 11:53 | 0.015 | 0.015 mg/l |
| 1 May 2026, 08:27 | 0.014 | 0.014 mg/l |
| 13 Apr 2026, 12:54 | 0.016 | 0.016 mg/l |
| 16 Mar 2026, 09:49 | 0.042 | 0.042 mg/l |
| 3 Mar 2026, 09:55 | 0.016 | 0.016 mg/l |
| 16 Feb 2026, 09:28 | 0.062 | 0.062 mg/l |
| 3 Feb 2026, 09:26 | 0.043 | 0.043 mg/l |
| 19 Jan 2026, 12:11 | 0.067 | 0.067 mg/l |
| 7 Jan 2026, 12:55 | 0.034 | 0.034 mg/l |
| 15 Dec 2025, 11:11 | 0.043 | 0.043 mg/l |
| 1 Dec 2025, 09:11 | 0.056 | 0.056 mg/l |
| 17 Nov 2025, 10:53 | 0.035 | 0.035 mg/l |
| 5 Nov 2025, 08:32 | 0.059 | 0.059 mg/l |
| 3 Oct 2025, 13:47 | 0.063 | 0.063 mg/l |
| 3 Sep 2025, 11:34 | 0.015 | 0.015 mg/l |
| 5 Aug 2025, 08:47 | 0.021 | 0.021 mg/l |
| 4 Jul 2025, 10:45 | 0.048 | 0.048 mg/l |
| 3 Jun 2025, 12:28 | <0.01 | below 0.01 mg/l (not detected above this) |
| 6 May 2025, 12:38 | 0.019 | 0.019 mg/l |
| 1 Apr 2025, 08:19 | <0.01 | below 0.01 mg/l (not detected above this) |
| 3 Mar 2025, 13:27 | 0.011 | 0.011 mg/l |
| 4 Feb 2025, 09:23 | 0.022 | 0.022 mg/l |
| 21 Jan 2025, 12:36 | 0.021 | 0.021 mg/l |
| 10 Dec 2024, 10:04 | 0.072 | 0.072 mg/l |
| 4 Dec 2024, 10:31 | 0.077 | 0.077 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
300 µS/cm
Sampled 18 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 May 2026, 11:53 | 300 | 300 µS/cm |
| 1 May 2026, 08:27 | 338 | 338 µS/cm |
| 13 Apr 2026, 12:54 | 303 | 303 µS/cm |
| 7 Apr 2026, 16:06 | 313 | 313 µS/cm |
| 16 Mar 2026, 09:49 | 292 | 292 µS/cm |
| 3 Mar 2026, 09:55 | 268 | 268 µS/cm |
| 16 Feb 2026, 09:28 | 258 | 258 µS/cm |
| 3 Feb 2026, 09:26 | 274 | 274 µS/cm |
| 19 Jan 2026, 12:11 | 271 | 271 µS/cm |
| 7 Jan 2026, 12:55 | 508 | 508 µS/cm |
| 15 Dec 2025, 11:11 | 309 | 309 µS/cm |
| 1 Dec 2025, 09:11 | 244 | 244 µS/cm |
| 17 Nov 2025, 10:53 | 337 | 337 µS/cm |
| 5 Nov 2025, 08:32 | 342 | 342 µS/cm |
| 3 Oct 2025, 13:47 | 380 | 380 µS/cm |
| 3 Sep 2025, 11:34 | 301 | 301 µS/cm |
| 5 Aug 2025, 08:47 | 310 | 310 µS/cm |
| 4 Jul 2025, 10:45 | 352 | 352 µS/cm |
| 3 Jun 2025, 12:28 | 305 | 305 µS/cm |
| 6 May 2025, 12:38 | 324 | 324 µS/cm |
| 1 Apr 2025, 08:19 | 326 | 326 µS/cm |
| 3 Mar 2025, 13:27 | 332 | 332 µS/cm |
| 4 Feb 2025, 09:23 | 371 | 371 µS/cm |
| 21 Jan 2025, 12:36 | 374 | 374 µS/cm |
| 10 Dec 2024, 10:04 | 304 | 304 µS/cm |
| 4 Dec 2024, 10:31 | 350 | 350 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 | 26 | Dec 2024 – May 2026 | 105.2% 18 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 26 | Dec 2024 – May 2026 | 11.8 mg/l 18 May 2026 |
| Temperature of Water 0076 | River water | 26 | Dec 2024 – May 2026 | 10.1 °C 18 May 2026 |
| pH 0061 | River water | 26 | Dec 2024 – May 2026 | 8.61 18 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 25 | Dec 2024 – May 2026 | below 0.03 mg/l 18 May 2026 |
| Nitrate as N 0117 | River water | 25 | Dec 2024 – May 2026 | 2.89 mg/l 18 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 25 | Dec 2024 – May 2026 | 0.015 mg/l 18 May 2026 |
| Conductivity at 25 C 0077 | River water | 26 | Dec 2024 – May 2026 | 300 µS/cm 18 May 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Nov 2023 – Jan 2025 | below 0.001 µg/l 21 Jan 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Nov 2023 – Jan 2025 | below 0.001 µg/l 21 Jan 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Nov 2023 – Jan 2025 | below 0.001 µg/l 21 Jan 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Nov 2023 – Jan 2025 | below 0.002 µg/l 21 Jan 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Nov 2023 – Jan 2025 | below 0.001 µg/l 21 Jan 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Nov 2023 – Jan 2025 | below 0.004 µg/l 21 Jan 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Nov 2023 – Jan 2025 | below 0.005 µg/l 21 Jan 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Nov 2023 – Jan 2025 | below 0.001 µg/l 21 Jan 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Nov 2023 – Jan 2025 | below 0.001 µg/l 21 Jan 2025 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 25 | Dec 2024 – May 2026 | 73 mg/l 18 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 25 | Dec 2024 – May 2026 | below 0.00055 mg/l 18 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 23 | Dec 2024 – May 2026 | 1.2 mg/l 18 May 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Nov 2023 – Jan 2025 | below 0.001 µg/l 21 Jan 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Nov 2023 – Jan 2025 | below 0.002 µg/l 21 Jan 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Nov 2023 – Jan 2025 | below 0.002 µg/l 21 Jan 2025 |
| Nitrite as N 0118 | River water | 25 | Dec 2024 – May 2026 | 0.0065 mg/l 18 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 25 | Dec 2024 – May 2026 | 2.9 mg/l 18 May 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Nov 2023 – Jan 2025 | below 0.001 µg/l 21 Jan 2025 |
| Perfluorobutanoic acid 2995 | River water | 2 | Nov 2023 – Jan 2025 | 0.001 µg/l 21 Jan 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Nov 2023 – Jan 2025 | below 0.002 µg/l 21 Jan 2025 |
| Perfluorodecanoic acid 8892 | River water | 2 | Nov 2023 – Jan 2025 | below 0.002 µg/l 21 Jan 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Nov 2023 – Jan 2025 | below 0.005 µg/l 21 Jan 2025 |
| Perfluorododecanoic acid 8894 | River water | 2 | Nov 2023 – Jan 2025 | below 0.002 µg/l 21 Jan 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Nov 2023 – Jan 2025 | below 0.001 µg/l 21 Jan 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluorohexanoic acid 8888 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluorononanoic acid 8891 | River water | 2 | Nov 2023 – Jan 2025 | below 0.001 µg/l 21 Jan 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Nov 2023 – Jan 2025 | below 0.002 µg/l 21 Jan 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Nov 2023 – Jan 2025 | below 0.001 µg/l 21 Jan 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluorooctanoic acid 8890 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Nov 2023 – Jan 2025 | below 0.0005 µg/l 21 Jan 2025 |
| Perfluoropentanoic acid 8887 | River water | 2 | Nov 2023 – Jan 2025 | below 0.001 µg/l 21 Jan 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Nov 2023 – Jan 2025 | below 0.006 µg/l 21 Jan 2025 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Nov 2023 – Jan 2025 | below 0.005 µg/l 21 Jan 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Nov 2023 – Jan 2025 | below 0.004 µg/l 21 Jan 2025 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Nov 2023 – Jan 2025 | below 0.002 µg/l 21 Jan 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.