River Petteril upstream of Bridge Little Blencow
EA name: RIVER PETTERIL U/S BRIDGE LITTLE BLENCOW
Environment Agency sampling point NW-88024647 · 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
- 11 Sep 2026, 09:0520 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 27 since 19 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 345364, 532729As published, to the nearest 1 m. Open in a map
- River, by its own name
- Petteril
- River, by the map
- River PetterilPlaced on the river its name gives, 2 m from the line.
- Next gauge downstream
- Newbiggin Bridge On the River Petteril · 33 km along the river
- Why it was sampled
- Monitoring (national agency policy) (21 samples)
Environmental monitoring statutory (EU directives) (6 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
94.3%
Sampled 11 Sep 2026, 20 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Sep 2026, 09:05 | 94.3 | 94.3% |
| 24 Aug 2026, 10:25 | 38.7 | 38.7% |
| 13 Jul 2026, 07:36 | 97.8 | 97.8% |
| 9 Jun 2026, 09:11 | 97.7 | 97.7% |
| 26 May 2026, 13:48 | 109.2 | 109.2% |
| 1 Apr 2026, 12:28 | 101.5 | 101.5% |
| 18 Mar 2026, 16:21 | 98.3 | 98.3% |
| 23 Feb 2026, 12:45 | 99.7 | 99.7% |
| 20 Jan 2026, 15:54 | 98.2 | 98.2% |
| 20 Mar 2025, 12:22 | 102.9 | 102.9% |
| 21 Feb 2025, 10:57 | 100.2 | 100.2% |
| 11 Feb 2025, 13:05 | 98.4 | 98.4% |
| 22 Jan 2025, 16:15 | 100.8 | 100.8% |
| 2 Dec 2024, 10:34 | 96.1 | 96.1% |
| 16 Oct 2024, 13:49 | 93.4 | 93.4% |
| 17 Sep 2024, 13:21 | 97.9 | 97.9% |
| 22 Aug 2024, 09:20 | 100.9 | 100.9% |
| 15 Jul 2024, 11:54 | 101 | 101% |
| 17 Jun 2024, 14:12 | 106.9 | 106.9% |
| 13 May 2024, 11:48 | 109.8 | 109.8% |
| 15 Apr 2024, 09:23 | 97.8 | 97.8% |
| 15 Mar 2024, 10:19 | 98.8 | 98.8% |
| 23 Feb 2024, 11:03 | 100.8 | 100.8% |
| 18 Jan 2024, 09:58 | 92.6 | 92.6% |
| 4 Dec 2023, 15:44 | 94.3 | 94.3% |
| 20 Nov 2023, 10:06 | 93.1 | 93.1% |
| 19 Oct 2023, 12:54 | 94.3 | 94.3% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.2 mg/l
Sampled 11 Sep 2026, 20 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Sep 2026, 09:05 | 10.2 | 10.2 mg/l |
| 24 Aug 2026, 10:25 | 4.01 | 4.01 mg/l |
| 13 Jul 2026, 07:36 | 10.5 | 10.5 mg/l |
| 9 Jun 2026, 09:11 | 10.8 | 10.8 mg/l |
| 26 May 2026, 13:48 | 10.8 | 10.8 mg/l |
| 1 Apr 2026, 12:28 | 11.5 | 11.5 mg/l |
| 18 Mar 2026, 16:21 | 11.1 | 11.1 mg/l |
| 23 Feb 2026, 12:45 | 11.8 | 11.8 mg/l |
| 20 Jan 2026, 15:54 | 11.8 | 11.8 mg/l |
| 20 Mar 2025, 12:22 | 12 | 12 mg/l |
| 21 Feb 2025, 10:57 | 11.5 | 11.5 mg/l |
| 11 Feb 2025, 13:05 | 12.1 | 12.1 mg/l |
| 22 Jan 2025, 16:15 | 12.1 | 12.1 mg/l |
| 2 Dec 2024, 10:34 | 11.4 | 11.4 mg/l |
| 16 Oct 2024, 13:49 | 10.3 | 10.3 mg/l |
| 17 Sep 2024, 13:21 | 10.6 | 10.6 mg/l |
| 22 Aug 2024, 09:20 | 10.8 | 10.8 mg/l |
| 15 Jul 2024, 11:54 | 10.8 | 10.8 mg/l |
| 17 Jun 2024, 14:12 | 11.3 | 11.3 mg/l |
| 13 May 2024, 11:48 | 11.5 | 11.5 mg/l |
| 15 Apr 2024, 09:23 | 11.7 | 11.7 mg/l |
| 15 Mar 2024, 10:19 | 11.6 | 11.6 mg/l |
| 23 Feb 2024, 11:03 | 12.2 | 12.2 mg/l |
| 18 Jan 2024, 09:58 | 11.8 | 11.8 mg/l |
| 4 Dec 2023, 15:44 | 11.4 | 11.4 mg/l |
| 20 Nov 2023, 10:06 | 10.7 | 10.7 mg/l |
| 19 Oct 2023, 12:54 | 10.5 | 10.5 mg/l |
Water temperature
code 0076 · °C
11.6 °C
Sampled 11 Sep 2026, 20 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Sep 2026, 09:05 | 11.6 | 11.6 °C |
| 24 Aug 2026, 10:25 | 13.6 | 13.6 °C |
| 13 Jul 2026, 07:36 | 12.2 | 12.2 °C |
| 9 Jun 2026, 09:11 | 11 | 11 °C |
| 26 May 2026, 13:48 | 15.6 | 15.6 °C |
| 1 Apr 2026, 12:28 | 9.6 | 9.6 °C |
| 18 Mar 2026, 16:21 | 9.9 | 9.9 °C |
| 23 Feb 2026, 12:45 | 7.8 | 7.8 °C |
| 20 Jan 2026, 15:54 | 7.5 | 7.5 °C |
| 20 Mar 2025, 12:22 | 8.7 | 8.7 °C |
| 21 Feb 2025, 10:57 | 9.3 | 9.3 °C |
| 11 Feb 2025, 13:05 | 6.5 | 6.5 °C |
| 22 Jan 2025, 16:15 | 7.3 | 7.3 °C |
| 2 Dec 2024, 10:34 | 8 | 8 °C |
| 16 Oct 2024, 13:49 | 10.8 | 10.8 °C |
| 17 Sep 2024, 13:21 | 11.6 | 11.6 °C |
| 22 Aug 2024, 09:20 | 12.1 | 12.1 °C |
| 15 Jul 2024, 11:54 | 12.2 | 12.2 °C |
| 17 Jun 2024, 14:12 | 12.6 | 12.6 °C |
| 13 May 2024, 11:48 | 13.3 | 13.3 °C |
| 15 Apr 2024, 09:23 | 7.6 | 7.6 °C |
| 15 Mar 2024, 10:19 | 8.2 | 8.2 °C |
| 23 Feb 2024, 11:03 | 7.1 | 7.1 °C |
| 18 Jan 2024, 09:58 | 4.9 | 4.9 °C |
| 4 Dec 2023, 15:44 | 7.1 | 7.1 °C |
| 20 Nov 2023, 10:06 | 9.3 | 9.3 °C |
| 19 Oct 2023, 12:54 | 10.7 | 10.7 °C |
pH
code 0061
8.12
Sampled 11 Sep 2026, 20 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Sep 2026, 09:05 | 8.12 | 8.12 |
| 24 Aug 2026, 10:25 | 7.18 | 7.18 |
| 13 Jul 2026, 07:36 | 8.15 | 8.15 |
| 9 Jun 2026, 09:11 | 8.08 | 8.08 |
| 26 May 2026, 13:48 | 8.32 | 8.32 |
| 1 Apr 2026, 12:28 | 7.97 | 7.97 |
| 18 Mar 2026, 16:21 | 7.93 | 7.93 |
| 23 Feb 2026, 12:45 | 7.95 | 7.95 |
| 20 Jan 2026, 15:54 | 7.93 | 7.93 |
| 20 Mar 2025, 12:22 | 8.24 | 8.24 |
| 21 Feb 2025, 10:57 | 8.06 | 8.06 |
| 11 Feb 2025, 13:05 | 8.1 | 8.1 |
| 22 Jan 2025, 16:15 | 8.04 | 8.04 |
| 2 Dec 2024, 10:34 | 7.85 | 7.85 |
| 16 Oct 2024, 13:49 | 7.45 | 7.45 |
| 17 Sep 2024, 13:21 | 8.01 | 8.01 |
| 22 Aug 2024, 09:20 | 8.03 | 8.03 |
| 15 Jul 2024, 11:54 | 8.05 | 8.05 |
| 17 Jun 2024, 14:12 | 8.08 | 8.08 |
| 13 May 2024, 11:48 | 8.31 | 8.31 |
| 15 Apr 2024, 09:23 | 7.77 | 7.77 |
| 15 Mar 2024, 10:19 | 7.82 | 7.82 |
| 23 Feb 2024, 11:03 | 7.84 | 7.84 |
| 18 Jan 2024, 09:58 | 8.16 | 8.16 |
| 4 Dec 2023, 15:44 | 7.85 | 7.85 |
| 20 Nov 2023, 10:06 | 7.67 | 7.67 |
| 19 Oct 2023, 12:54 | 7.66 | 7.66 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.0051 mg/l
Sampled 11 Sep 2026, 20 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Sep 2026, 09:05 | 0.0051 | 0.0051 mg/l |
| 24 Aug 2026, 10:25 | 0.019 | 0.019 mg/l |
| 13 Jul 2026, 07:36 | 0.016 | 0.016 mg/l |
| 9 Jun 2026, 09:11 | 0.041 | 0.041 mg/l |
| 26 May 2026, 13:48 | 0.011 | 0.011 mg/l |
| 1 Apr 2026, 12:28 | 0.036 | 0.036 mg/l |
| 18 Mar 2026, 16:21 | 0.012 | 0.012 mg/l |
| 23 Feb 2026, 12:45 | 0.026 | 0.026 mg/l |
| 20 Jan 2026, 15:54 | 0.037 | 0.037 mg/l |
| 20 Mar 2025, 12:22 | 0.082 | 0.082 mg/l |
| 21 Feb 2025, 10:57 | 0.1 | 0.1 mg/l |
| 11 Feb 2025, 13:05 | 0.036 | 0.036 mg/l |
| 22 Jan 2025, 16:15 | 0.038 | 0.038 mg/l |
| 2 Dec 2024, 10:34 | 0.04 | 0.04 mg/l |
| 16 Oct 2024, 13:49 | 0.02 | 0.02 mg/l |
| 17 Sep 2024, 13:21 | 0.022 | 0.022 mg/l |
| 22 Aug 2024, 09:20 | 0.013 | 0.013 mg/l |
| 15 Jul 2024, 11:54 | 0.034 | 0.034 mg/l |
| 13 May 2024, 11:48 | 0.027 | 0.027 mg/l |
| 15 Apr 2024, 09:23 | 0.027 | 0.027 mg/l |
| 15 Mar 2024, 10:19 | 0.031 | 0.031 mg/l |
| 23 Feb 2024, 11:03 | 0.026 | 0.026 mg/l |
| 18 Jan 2024, 09:58 | 0.063 | 0.063 mg/l |
| 4 Dec 2023, 15:44 | 0.16 | 0.16 mg/l |
| 20 Nov 2023, 10:06 | 0.028 | 0.028 mg/l |
| 19 Oct 2023, 12:54 | 0.082 | 0.082 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.59 mg/l
Sampled 11 Sep 2026, 20 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Sep 2026, 09:05 | 2.59 | 2.59 mg/l |
| 24 Aug 2026, 10:25 | 2.28 | 2.28 mg/l |
| 13 Jul 2026, 07:36 | 1.77 | 1.77 mg/l |
| 9 Jun 2026, 09:11 | 1.96 | 1.96 mg/l |
| 26 May 2026, 13:48 | 2.16 | 2.16 mg/l |
| 1 Apr 2026, 12:28 | 1.99 | 1.99 mg/l |
| 18 Mar 2026, 16:21 | 1.7 | 1.7 mg/l |
| 23 Feb 2026, 12:45 | 1.49 | 1.49 mg/l |
| 20 Jan 2026, 15:54 | 1.49 | 1.49 mg/l |
| 20 Mar 2025, 12:22 | 2.18 | 2.18 mg/l |
| 21 Feb 2025, 10:57 | 1.78 | 1.78 mg/l |
| 11 Feb 2025, 13:05 | 1.89 | 1.89 mg/l |
| 22 Jan 2025, 16:15 | 1.89 | 1.89 mg/l |
| 2 Dec 2024, 10:34 | 1.29 | 1.29 mg/l |
| 16 Oct 2024, 13:49 | 1.18 | 1.18 mg/l |
| 17 Sep 2024, 13:21 | 1.88 | 1.88 mg/l |
| 22 Aug 2024, 09:20 | 1.68 | 1.68 mg/l |
| 15 Jul 2024, 11:54 | 1.58 | 1.58 mg/l |
| 17 Jun 2024, 14:12 | 1.59 | 1.59 mg/l |
| 13 May 2024, 11:48 | 2.18 | 2.18 mg/l |
| 15 Apr 2024, 09:23 | 0.996 | 0.996 mg/l |
| 15 Mar 2024, 10:19 | 1.19 | 1.19 mg/l |
| 23 Feb 2024, 11:03 | 1.6 | 1.6 mg/l |
| 18 Jan 2024, 09:58 | 1.99 | 1.99 mg/l |
| 4 Dec 2023, 15:44 | 1.89 | 1.89 mg/l |
| 20 Nov 2023, 10:06 | 1.6 | 1.6 mg/l |
| 19 Oct 2023, 12:54 | 1.48 | 1.48 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.044 mg/l
Sampled 11 Sep 2026, 20 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Sep 2026, 09:05 | 0.044 | 0.044 mg/l |
| 24 Aug 2026, 10:25 | 0.036 | 0.036 mg/l |
| 13 Jul 2026, 07:36 | 0.039 | 0.039 mg/l |
| 9 Jun 2026, 09:11 | 0.049 | 0.049 mg/l |
| 26 May 2026, 13:48 | 0.023 | 0.023 mg/l |
| 1 Apr 2026, 12:28 | 0.025 | 0.025 mg/l |
| 18 Mar 2026, 16:21 | 0.022 | 0.022 mg/l |
| 23 Feb 2026, 12:45 | 0.029 | 0.029 mg/l |
| 20 Jan 2026, 15:54 | 0.024 | 0.024 mg/l |
| 20 Mar 2025, 12:22 | 0.024 | 0.024 mg/l |
| 21 Feb 2025, 10:57 | 0.035 | 0.035 mg/l |
| 11 Feb 2025, 13:05 | 0.023 | 0.023 mg/l |
| 22 Jan 2025, 16:15 | 0.025 | 0.025 mg/l |
| 2 Dec 2024, 10:34 | 0.042 | 0.042 mg/l |
| 16 Oct 2024, 13:49 | 0.08 | 0.08 mg/l |
| 17 Sep 2024, 13:21 | 0.027 | 0.027 mg/l |
| 22 Aug 2024, 09:20 | 0.037 | 0.037 mg/l |
| 15 Jul 2024, 11:54 | 0.032 | 0.032 mg/l |
| 17 Jun 2024, 14:12 | 0.037 | 0.037 mg/l |
| 13 May 2024, 11:48 | 0.025 | 0.025 mg/l |
| 15 Apr 2024, 09:23 | 0.026 | 0.026 mg/l |
| 15 Mar 2024, 10:19 | 0.028 | 0.028 mg/l |
| 23 Feb 2024, 11:03 | 0.029 | 0.029 mg/l |
| 18 Jan 2024, 09:58 | 0.024 | 0.024 mg/l |
| 4 Dec 2023, 15:44 | 0.039 | 0.039 mg/l |
| 20 Nov 2023, 10:06 | 0.03 | 0.03 mg/l |
| 19 Oct 2023, 12:54 | 0.063 | 0.063 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
513 µS/cm
Sampled 11 Sep 2026, 20 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Sep 2026, 09:05 | 513 | 513 µS/cm |
| 24 Aug 2026, 10:25 | 604 | 604 µS/cm |
| 13 Jul 2026, 07:36 | 517 | 517 µS/cm |
| 9 Jun 2026, 09:11 | 469 | 469 µS/cm |
| 26 May 2026, 13:48 | 509 | 509 µS/cm |
| 1 Apr 2026, 12:28 | 438 | 438 µS/cm |
| 18 Mar 2026, 16:21 | 426 | 426 µS/cm |
| 23 Feb 2026, 12:45 | 381 | 381 µS/cm |
| 20 Jan 2026, 15:54 | 422 | 422 µS/cm |
| 20 Mar 2025, 12:22 | 511 | 511 µS/cm |
| 21 Feb 2025, 10:57 | 493 | 493 µS/cm |
| 11 Feb 2025, 13:05 | 497 | 497 µS/cm |
| 22 Jan 2025, 16:15 | 488 | 488 µS/cm |
| 2 Dec 2024, 10:34 | 394 | 394 µS/cm |
| 16 Oct 2024, 13:49 | 386 | 386 µS/cm |
| 17 Sep 2024, 13:21 | 499 | 499 µS/cm |
| 22 Aug 2024, 09:20 | 460 | 460 µS/cm |
| 15 Jul 2024, 11:54 | 454 | 454 µS/cm |
| 17 Jun 2024, 14:12 | 432 | 432 µS/cm |
| 13 May 2024, 11:48 | 480 | 480 µS/cm |
| 15 Apr 2024, 09:23 | 302 | 302 µS/cm |
| 15 Mar 2024, 10:19 | 319 | 319 µS/cm |
| 23 Feb 2024, 11:03 | 375 | 375 µS/cm |
| 18 Jan 2024, 09:58 | 480 | 480 µS/cm |
| 4 Dec 2023, 15:44 | 514 | 514 µS/cm |
| 20 Nov 2023, 10:06 | 366 | 366 µS/cm |
| 19 Oct 2023, 12:54 | 359 | 359 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 | 27 | Oct 2023 – Sep 2026 | 94.3% 11 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 27 | Oct 2023 – Sep 2026 | 10.2 mg/l 11 Sep 2026 |
| Temperature of Water 0076 | River water | 27 | Oct 2023 – Sep 2026 | 11.6 °C 11 Sep 2026 |
| pH 0061 | River water | 27 | Oct 2023 – Sep 2026 | 8.12 11 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 26 | Oct 2023 – Sep 2026 | 0.0051 mg/l 11 Sep 2026 |
| Nitrate as N 0117 | River water | 27 | Oct 2023 – Sep 2026 | 2.59 mg/l 11 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 27 | Oct 2023 – Sep 2026 | 0.044 mg/l 11 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 27 | Oct 2023 – Sep 2026 | 513 µS/cm 11 Sep 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 2 Dec 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 2 Dec 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 2 Dec 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 2 Dec 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 2 Dec 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 2 Dec 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 2 Dec 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Dec 2024 – Dec 2024 | below 0.004 µg/l 2 Dec 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Dec 2024 – Dec 2024 | below 0.005 µg/l 2 Dec 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 2 Dec 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 2 Dec 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 2 Dec 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 2 Dec 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 27 | Oct 2023 – Sep 2026 | 220 mg/l 11 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 26 | Oct 2023 – Sep 2026 | 0.0001 mg/l 11 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 23 | Feb 2024 – Sep 2026 | below 1 mg/l 11 Sep 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 2 Dec 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 2 Dec 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 2 Dec 2024 |
| Nitrite as N 0118 | River water | 27 | Oct 2023 – Sep 2026 | 0.015 mg/l 11 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 27 | Oct 2023 – Sep 2026 | 2.6 mg/l 11 Sep 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 2 Dec 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 2 Dec 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 2 Dec 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 2 Dec 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 2 Dec 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Dec 2024 – Dec 2024 | 0.0018 µg/l 2 Dec 2024 |
| Perfluorobutanoic acid 2995 | River water | 1 | Dec 2024 – Dec 2024 | 0.0022 µg/l 2 Dec 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 2 Dec 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 2 Dec 2024 |
| Perfluorodecanoic acid 8892 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 2 Dec 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Dec 2024 – Dec 2024 | below 0.005 µg/l 2 Dec 2024 |
| Perfluorododecanoic acid 8894 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 2 Dec 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Dec 2024 – Dec 2024 | 0.00099 µg/l 2 Dec 2024 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Dec 2024 – Dec 2024 | 0.0019 µg/l 2 Dec 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 2 Dec 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 2 Dec 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Dec 2024 – Dec 2024 | 0.0017 µg/l 2 Dec 2024 |
| Perfluorohexanoic acid 8888 | River water | 1 | Dec 2024 – Dec 2024 | 0.0013 µg/l 2 Dec 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Dec 2024 – Dec 2024 | 0.00077 µg/l 2 Dec 2024 |
| Perfluorononanoic acid 8891 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 2 Dec 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 2 Dec 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Dec 2024 – Dec 2024 | below 0.001 µg/l 2 Dec 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Dec 2024 – Dec 2024 | below 0.0005 µg/l 2 Dec 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Dec 2024 – Dec 2024 | 0.00099 µg/l 2 Dec 2024 |
| Perfluorooctanoic acid 8890 | River water | 1 | Dec 2024 – Dec 2024 | 0.0018 µg/l 2 Dec 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Dec 2024 – Dec 2024 | 0.00085 µg/l 2 Dec 2024 |
| Perfluoropentanoic acid 8887 | River water | 1 | Dec 2024 – Dec 2024 | 0.0017 µg/l 2 Dec 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Dec 2024 – Dec 2024 | below 0.006 µg/l 2 Dec 2024 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Dec 2024 – Dec 2024 | below 0.005 µg/l 2 Dec 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Dec 2024 – Dec 2024 | below 0.004 µg/l 2 Dec 2024 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Dec 2024 – Dec 2024 | below 0.002 µg/l 2 Dec 2024 |
| Phosphorus, Total as P 0348 | River water | 6 | Apr 2026 – Sep 2026 | 0.048 mg/l 11 Sep 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.