Hoff (Ashby) Beck at Colby Hall
EA name: HOFF (ASHBY) BECK AT COLBY HALL
Environment Agency sampling point NW-88006190 · 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
- 3 Aug 2026, 10:3759 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 26 since 17 Jun 2024 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 366508, 520916As published, to the nearest 1 m. Open in a map
- River, by its own name
- Hoff Beck
- River, by the map
- Not placedIts name gives Hoff Beck; the only line close by, 9 m away, is Colby Beck 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) (22 samples)
Environmental monitoring statutory (EU directives) (4 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
93.4%
Sampled 3 Aug 2026, 59 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 10:37 | 93.4 | 93.4% |
| 6 Jul 2026, 10:59 | 106.9 | 106.9% |
| 18 Jun 2026, 10:48 | 101.4 | 101.4% |
| 9 Jun 2026, 11:09 | 105.8 | 105.8% |
| 6 Mar 2026, 10:24 | 99.4 | 99.4% |
| 11 Feb 2026, 13:38 | 98 | 98% |
| 2 Jan 2026, 15:13 | 102.9 | 102.9% |
| 3 Dec 2025, 11:58 | 100.7 | 100.7% |
| 5 Nov 2025, 11:57 | 96.3 | 96.3% |
| 15 Oct 2025, 12:19 | 107.2 | 107.2% |
| 11 Sep 2025, 13:42 | 120.4 | 120.4% |
| 28 Aug 2025, 12:57 | 105.9 | 105.9% |
| 17 Jul 2025, 11:57 | 122.1 | 122.1% |
| 3 Jun 2025, 07:37 | 79.6 | 79.6% |
| 16 May 2025, 10:39 | 97.9 | 97.9% |
| 8 Apr 2025, 14:54 | 137.9 | 137.9% |
| 19 Mar 2025, 13:26 | 127 | 127% |
| 18 Feb 2025, 13:13 | 101.9 | 101.9% |
| 31 Jan 2025, 10:39 | 100.4 | 100.4% |
| 2 Dec 2024, 12:43 | 99.7 | 99.7% |
| 18 Nov 2024, 13:20 | 110.1 | 110.1% |
| 23 Oct 2024, 10:07 | 97.7 | 97.7% |
| 27 Sep 2024, 15:00 | 101.7 | 101.7% |
| 30 Aug 2024, 09:50 | 101.1 | 101.1% |
| 18 Jul 2024, 11:49 | 109.1 | 109.1% |
| 17 Jun 2024, 14:36 | 117 | 117% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.16 mg/l
Sampled 3 Aug 2026, 59 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 10:37 | 9.16 | 9.16 mg/l |
| 6 Jul 2026, 10:59 | 10.3 | 10.3 mg/l |
| 18 Jun 2026, 10:48 | 10.2 | 10.2 mg/l |
| 9 Jun 2026, 11:09 | 11.2 | 11.2 mg/l |
| 6 Mar 2026, 10:24 | 12.2 | 12.2 mg/l |
| 11 Feb 2026, 13:38 | 11.9 | 11.9 mg/l |
| 2 Jan 2026, 15:13 | 13.9 | 13.9 mg/l |
| 3 Dec 2025, 11:58 | 12 | 12 mg/l |
| 5 Nov 2025, 11:57 | 10.6 | 10.6 mg/l |
| 15 Oct 2025, 12:19 | 12 | 12 mg/l |
| 11 Sep 2025, 13:42 | 12.6 | 12.6 mg/l |
| 28 Aug 2025, 12:57 | 10.4 | 10.4 mg/l |
| 17 Jul 2025, 11:57 | 11.9 | 11.9 mg/l |
| 3 Jun 2025, 07:37 | 8.48 | 8.48 mg/l |
| 16 May 2025, 10:39 | 10.4 | 10.4 mg/l |
| 8 Apr 2025, 14:54 | 14.9 | 14.9 mg/l |
| 19 Mar 2025, 13:26 | 15.4 | 15.4 mg/l |
| 18 Feb 2025, 13:13 | 13.7 | 13.7 mg/l |
| 31 Jan 2025, 10:39 | 12.6 | 12.6 mg/l |
| 2 Dec 2024, 12:43 | 11.7 | 11.7 mg/l |
| 18 Nov 2024, 13:20 | 14 | 14 mg/l |
| 23 Oct 2024, 10:07 | 11.1 | 11.1 mg/l |
| 27 Sep 2024, 15:00 | 11.4 | 11.4 mg/l |
| 30 Aug 2024, 09:50 | 11.1 | 11.1 mg/l |
| 18 Jul 2024, 11:49 | 10.9 | 10.9 mg/l |
| 17 Jun 2024, 14:36 | 12 | 12 mg/l |
Water temperature
code 0076 · °C
16.2 °C
Sampled 3 Aug 2026, 59 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 10:37 | 16.2 | 16.2 °C |
| 6 Jul 2026, 10:59 | 17.1 | 17.1 °C |
| 18 Jun 2026, 10:48 | 15.1 | 15.1 °C |
| 9 Jun 2026, 11:09 | 12.7 | 12.7 °C |
| 6 Mar 2026, 10:24 | 6.6 | 6.6 °C |
| 11 Feb 2026, 13:38 | 6.9 | 6.9 °C |
| 2 Jan 2026, 15:13 | 2.9 | 2.9 °C |
| 3 Dec 2025, 11:58 | 7.8 | 7.8 °C |
| 5 Nov 2025, 11:57 | 11 | 11 °C |
| 15 Oct 2025, 12:19 | 10.2 | 10.2 °C |
| 11 Sep 2025, 13:42 | 13.1 | 13.1 °C |
| 28 Aug 2025, 12:57 | 16.3 | 16.3 °C |
| 17 Jul 2025, 11:57 | 16.3 | 16.3 °C |
| 3 Jun 2025, 07:37 | 12.4 | 12.4 °C |
| 16 May 2025, 10:39 | 12.5 | 12.5 °C |
| 8 Apr 2025, 14:54 | 11.7 | 11.7 °C |
| 19 Mar 2025, 13:26 | 6.9 | 6.9 °C |
| 18 Feb 2025, 13:13 | 3.1 | 3.1 °C |
| 31 Jan 2025, 10:39 | 5.5 | 5.5 °C |
| 2 Dec 2024, 12:43 | 8.3 | 8.3 °C |
| 18 Nov 2024, 13:20 | 5 | 5 °C |
| 23 Oct 2024, 10:07 | 9.8 | 9.8 °C |
| 27 Sep 2024, 15:00 | 10.2 | 10.2 °C |
| 30 Aug 2024, 09:50 | 11.1 | 11.1 °C |
| 18 Jul 2024, 11:49 | 15.3 | 15.3 °C |
| 17 Jun 2024, 14:36 | 14.1 | 14.1 °C |
pH
code 0061
8.08
Sampled 3 Aug 2026, 59 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 10:37 | 8.08 | 8.08 |
| 6 Jul 2026, 10:59 | 8.26 | 8.26 |
| 18 Jun 2026, 10:48 | 8.22 | 8.22 |
| 9 Jun 2026, 11:09 | 8.29 | 8.29 |
| 6 Mar 2026, 10:24 | 8.08 | 8.08 |
| 11 Feb 2026, 13:38 | 8.42 | 8.42 |
| 2 Jan 2026, 15:13 | 8.36 | 8.36 |
| 3 Dec 2025, 11:58 | 8.25 | 8.25 |
| 5 Nov 2025, 11:57 | 8.01 | 8.01 |
| 15 Oct 2025, 12:19 | 8.32 | 8.32 |
| 11 Sep 2025, 13:42 | 8.64 | 8.64 |
| 28 Aug 2025, 12:57 | 8.3 | 8.3 |
| 17 Jul 2025, 11:57 | 8.45 | 8.45 |
| 3 Jun 2025, 07:37 | 7.93 | 7.93 |
| 16 May 2025, 10:39 | 8.11 | 8.11 |
| 8 Apr 2025, 14:54 | 8.53 | 8.53 |
| 19 Mar 2025, 13:26 | 8.56 | 8.56 |
| 18 Feb 2025, 13:13 | 8.36 | 8.36 |
| 31 Jan 2025, 10:39 | 8.3 | 8.3 |
| 2 Dec 2024, 12:43 | 8.23 | 8.23 |
| 18 Nov 2024, 13:20 | 8.41 | 8.41 |
| 23 Oct 2024, 10:07 | 8.18 | 8.18 |
| 27 Sep 2024, 15:00 | 8.47 | 8.47 |
| 30 Aug 2024, 09:50 | 8.27 | 8.27 |
| 18 Jul 2024, 11:49 | 8.4 | 8.4 |
| 17 Jun 2024, 14:36 | 8.48 | 8.48 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.0059 mg/l
Sampled 3 Aug 2026, 59 days ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 10:37 | 0.0059 | 0.0059 mg/l |
| 6 Jul 2026, 10:59 | 0.018 | 0.018 mg/l |
| 18 Jun 2026, 10:48 | 0.03 | 0.03 mg/l |
| 9 Jun 2026, 11:09 | 0.025 | 0.025 mg/l |
| 6 Mar 2026, 10:24 | 0.043 | 0.043 mg/l |
| 11 Feb 2026, 13:38 | 0.03 | 0.03 mg/l |
| 2 Jan 2026, 15:13 | 0.022 | 0.022 mg/l |
| 3 Dec 2025, 11:58 | 0.0095 | 0.0095 mg/l |
| 5 Nov 2025, 11:57 | 0.024 | 0.024 mg/l |
| 15 Oct 2025, 12:19 | 0.0047 | 0.0047 mg/l |
| 11 Sep 2025, 13:42 | 0.0091 | 0.0091 mg/l |
| 28 Aug 2025, 12:57 | 0.02 | 0.02 mg/l |
| 17 Jul 2025, 11:57 | 0.014 | 0.014 mg/l |
| 3 Jun 2025, 07:37 | 0.062 | 0.062 mg/l |
| 16 May 2025, 10:39 | 0.0059 | 0.0059 mg/l |
| 8 Apr 2025, 14:54 | 0.0047 | 0.0047 mg/l |
| 19 Mar 2025, 13:26 | 0.0099 | 0.0099 mg/l |
| 18 Feb 2025, 13:13 | <0.002 | below 0.002 mg/l (not detected above this) |
| 31 Jan 2025, 10:39 | 0.012 | 0.012 mg/l |
| 18 Nov 2024, 13:20 | 0.01 | 0.01 mg/l |
| 23 Oct 2024, 10:07 | 0.014 | 0.014 mg/l |
| 27 Sep 2024, 15:00 | 0.019 | 0.019 mg/l |
| 30 Aug 2024, 09:50 | 0.0071 | 0.0071 mg/l |
| 18 Jul 2024, 11:49 | 0.018 | 0.018 mg/l |
| 17 Jun 2024, 14:36 | 0.015 | 0.015 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.585 mg/l
Sampled 3 Aug 2026, 59 days ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 10:37 | 0.585 | 0.585 mg/l |
| 6 Jul 2026, 10:59 | 0.661 | 0.661 mg/l |
| 18 Jun 2026, 10:48 | 0.922 | 0.922 mg/l |
| 9 Jun 2026, 11:09 | 0.876 | 0.876 mg/l |
| 6 Mar 2026, 10:24 | 1.19 | 1.19 mg/l |
| 11 Feb 2026, 13:38 | 1.19 | 1.19 mg/l |
| 2 Jan 2026, 15:13 | 2.09 | 2.09 mg/l |
| 3 Dec 2025, 11:58 | 1.6 | 1.6 mg/l |
| 5 Nov 2025, 11:57 | 1.29 | 1.29 mg/l |
| 15 Oct 2025, 12:19 | 1.5 | 1.5 mg/l |
| 11 Sep 2025, 13:42 | 0.814 | 0.814 mg/l |
| 28 Aug 2025, 12:57 | 0.684 | 0.684 mg/l |
| 17 Jul 2025, 11:57 | 0.618 | 0.618 mg/l |
| 3 Jun 2025, 07:37 | 1.18 | 1.18 mg/l |
| 16 May 2025, 10:39 | 0.789 | 0.789 mg/l |
| 8 Apr 2025, 14:54 | 0.994 | 0.994 mg/l |
| 19 Mar 2025, 13:26 | 1.5 | 1.5 mg/l |
| 18 Feb 2025, 13:13 | 1.59 | 1.59 mg/l |
| 31 Jan 2025, 10:39 | 1.5 | 1.5 mg/l |
| 18 Nov 2024, 13:20 | 1.69 | 1.69 mg/l |
| 23 Oct 2024, 10:07 | 1.1 | 1.1 mg/l |
| 27 Sep 2024, 15:00 | 0.905 | 0.905 mg/l |
| 30 Aug 2024, 09:50 | 0.845 | 0.845 mg/l |
| 18 Jul 2024, 11:49 | 0.876 | 0.876 mg/l |
| 17 Jun 2024, 14:36 | 1.29 | 1.29 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.0022 mg/l
Sampled 3 Aug 2026, 59 days ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 10:37 | 0.0022 | 0.0022 mg/l |
| 6 Jul 2026, 10:59 | 0.0084 | 0.0084 mg/l |
| 18 Jun 2026, 10:48 | 0.03 | 0.03 mg/l |
| 9 Jun 2026, 11:09 | 0.027 | 0.027 mg/l |
| 6 Mar 2026, 10:24 | 0.046 | 0.046 mg/l |
| 11 Feb 2026, 13:38 | 0.043 | 0.043 mg/l |
| 2 Jan 2026, 15:13 | 0.037 | 0.037 mg/l |
| 3 Dec 2025, 11:58 | 0.025 | 0.025 mg/l |
| 5 Nov 2025, 11:57 | 0.052 | 0.052 mg/l |
| 15 Oct 2025, 12:19 | 0.018 | 0.018 mg/l |
| 11 Sep 2025, 13:42 | 0.0095 | 0.0095 mg/l |
| 28 Aug 2025, 12:57 | 0.011 | 0.011 mg/l |
| 17 Jul 2025, 11:57 | 0.011 | 0.011 mg/l |
| 3 Jun 2025, 07:37 | 0.007 | 0.007 mg/l |
| 16 May 2025, 10:39 | 0.0041 | 0.0041 mg/l |
| 8 Apr 2025, 14:54 | 0.0023 | 0.0023 mg/l |
| 19 Mar 2025, 13:26 | 0.0082 | 0.0082 mg/l |
| 18 Feb 2025, 13:13 | 0.018 | 0.018 mg/l |
| 31 Jan 2025, 10:39 | 0.023 | 0.023 mg/l |
| 18 Nov 2024, 13:20 | 0.026 | 0.026 mg/l |
| 23 Oct 2024, 10:07 | 0.027 | 0.027 mg/l |
| 27 Sep 2024, 15:00 | 0.034 | 0.034 mg/l |
| 30 Aug 2024, 09:50 | 0.021 | 0.021 mg/l |
| 18 Jul 2024, 11:49 | 0.025 | 0.025 mg/l |
| 17 Jun 2024, 14:36 | 0.022 | 0.022 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
411 µS/cm
Sampled 3 Aug 2026, 59 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Aug 2026, 10:37 | 411 | 411 µS/cm |
| 6 Jul 2026, 10:59 | 425 | 425 µS/cm |
| 18 Jun 2026, 10:48 | 456 | 456 µS/cm |
| 9 Jun 2026, 11:09 | 432 | 432 µS/cm |
| 6 Mar 2026, 10:24 | 376 | 376 µS/cm |
| 11 Feb 2026, 13:38 | 360 | 360 µS/cm |
| 2 Jan 2026, 15:13 | 508 | 508 µS/cm |
| 3 Dec 2025, 11:58 | 416 | 416 µS/cm |
| 5 Nov 2025, 11:57 | 382 | 382 µS/cm |
| 15 Oct 2025, 12:19 | 491 | 491 µS/cm |
| 11 Sep 2025, 13:42 | 388 | 388 µS/cm |
| 28 Aug 2025, 12:57 | 411 | 411 µS/cm |
| 17 Jul 2025, 11:57 | 399 | 399 µS/cm |
| 3 Jun 2025, 07:37 | 394 | 394 µS/cm |
| 16 May 2025, 10:39 | 440 | 440 µS/cm |
| 8 Apr 2025, 14:54 | 420 | 420 µS/cm |
| 19 Mar 2025, 13:26 | 475 | 475 µS/cm |
| 18 Feb 2025, 13:13 | 507 | 507 µS/cm |
| 31 Jan 2025, 10:39 | 503 | 503 µS/cm |
| 2 Dec 2024, 12:43 | 407 | 407 µS/cm |
| 18 Nov 2024, 13:20 | 530 | 530 µS/cm |
| 23 Oct 2024, 10:07 | 482 | 482 µS/cm |
| 27 Sep 2024, 15:00 | 445 | 445 µS/cm |
| 30 Aug 2024, 09:50 | 462 | 462 µS/cm |
| 18 Jul 2024, 11:49 | 475 | 475 µS/cm |
| 17 Jun 2024, 14:36 | 438 | 438 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 | Jun 2024 – Aug 2026 | 93.4% 3 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 26 | Jun 2024 – Aug 2026 | 9.16 mg/l 3 Aug 2026 |
| Temperature of Water 0076 | River water | 26 | Jun 2024 – Aug 2026 | 16.2 °C 3 Aug 2026 |
| pH 0061 | River water | 26 | Jun 2024 – Aug 2026 | 8.08 3 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 25 | Jun 2024 – Aug 2026 | 0.0059 mg/l 3 Aug 2026 |
| Nitrate as N 0117 | River water | 25 | Jun 2024 – Aug 2026 | 0.585 mg/l 3 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 25 | Jun 2024 – Aug 2026 | 0.0022 mg/l 3 Aug 2026 |
| Conductivity at 25 C 0077 | River water | 26 | Jun 2024 – Aug 2026 | 411 µS/cm 3 Aug 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 1 | Nov 2024 – Nov 2024 | below 0.001 µg/l 18 Nov 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Nov 2024 – Nov 2024 | below 0.001 µg/l 18 Nov 2024 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 1 | Nov 2024 – Nov 2024 | below 0.001 µg/l 18 Nov 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 1 | Nov 2024 – Nov 2024 | below 0.002 µg/l 18 Nov 2024 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 1 | Nov 2024 – Nov 2024 | below 0.001 µg/l 18 Nov 2024 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 1 | Nov 2024 – Nov 2024 | below 0.004 µg/l 18 Nov 2024 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 1 | Nov 2024 – Nov 2024 | below 0.005 µg/l 18 Nov 2024 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 1 | Nov 2024 – Nov 2024 | below 0.001 µg/l 18 Nov 2024 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Nov 2024 – Nov 2024 | below 0.001 µg/l 18 Nov 2024 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 25 | Jun 2024 – Aug 2026 | 190 mg/l 3 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 25 | Jun 2024 – Aug 2026 | 0.00017 mg/l 3 Aug 2026 |
| BOD : 5 Day ATU 0085 | River water | 21 | Jun 2024 – Jun 2026 | 1.2 mg/l 18 Jun 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 1 | Nov 2024 – Nov 2024 | below 0.001 µg/l 18 Nov 2024 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 1 | Nov 2024 – Nov 2024 | below 0.002 µg/l 18 Nov 2024 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 1 | Nov 2024 – Nov 2024 | below 0.002 µg/l 18 Nov 2024 |
| Nitrite as N 0118 | River water | 25 | Jun 2024 – Aug 2026 | 0.0053 mg/l 3 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 25 | Jun 2024 – Aug 2026 | 0.59 mg/l 3 Aug 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Nov 2024 – Nov 2024 | below 0.001 µg/l 18 Nov 2024 |
| Perfluorobutanoic acid 2995 | River water | 1 | Nov 2024 – Nov 2024 | below 0.001 µg/l 18 Nov 2024 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluorodecanesulfonic acid 2969 | River water | 1 | Nov 2024 – Nov 2024 | below 0.002 µg/l 18 Nov 2024 |
| Perfluorodecanoic acid 8892 | River water | 1 | Nov 2024 – Nov 2024 | below 0.002 µg/l 18 Nov 2024 |
| Perfluorododecane sulfonic acid 2968 | River water | 1 | Nov 2024 – Nov 2024 | below 0.005 µg/l 18 Nov 2024 |
| Perfluorododecanoic acid 8894 | River water | 1 | Nov 2024 – Nov 2024 | below 0.002 µg/l 18 Nov 2024 |
| Perfluoroheptanesulfonic acid 2967 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluoroheptanoic acid 8889 | River water | 1 | Nov 2024 – Nov 2024 | below 0.001 µg/l 18 Nov 2024 |
| Perfluorohexanesulfonamide 2965 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluorohexanoic acid 8888 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluorononanesulfonic acid 2963 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluorononanoic acid 8891 | River water | 1 | Nov 2024 – Nov 2024 | below 0.001 µg/l 18 Nov 2024 |
| Perfluorooctadecanoic acid 2962 | River water | 1 | Nov 2024 – Nov 2024 | below 0.002 µg/l 18 Nov 2024 |
| Perfluorooctanesulfonamide 2961 | River water | 1 | Nov 2024 – Nov 2024 | below 0.001 µg/l 18 Nov 2024 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluorooctanoic acid 8890 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluoropentanesulfonic acid 2957 | River water | 1 | Nov 2024 – Nov 2024 | below 0.0005 µg/l 18 Nov 2024 |
| Perfluoropentanoic acid 8887 | River water | 1 | Nov 2024 – Nov 2024 | below 0.001 µg/l 18 Nov 2024 |
| Perfluorotetradecanoic acid 8895 | River water | 1 | Nov 2024 – Nov 2024 | below 0.006 µg/l 18 Nov 2024 |
| Perfluorotridecanoic acid 2955 | River water | 1 | Nov 2024 – Nov 2024 | below 0.005 µg/l 18 Nov 2024 |
| Perfluoroundecane sulfonic acid 2953 | River water | 1 | Nov 2024 – Nov 2024 | below 0.004 µg/l 18 Nov 2024 |
| Perfluoroundecanoic acid 8893 | River water | 1 | Nov 2024 – Nov 2024 | below 0.002 µg/l 18 Nov 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.