Un-Named tributary at Knot Hill Mill
EA name: UN-NAMED TRIB AT KNOT HILL MILL
Environment Agency sampling point NW-SSN0006 · 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
- 5 May 2026, 10:515 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
- 36 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 348170, 550334As published, to the nearest 1 m. Open in a map
- River, by its own name
- Un Named
- River, by the map
- Not placedNo mapped watercourse within 500 m. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (36 samples)
10 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
72.1%
Sampled 5 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 10:51 | 72.1 | 72.1% |
| 1 Apr 2026, 08:36 | 89.4 | 89.4% |
| 18 Mar 2026, 07:47 | 96.6 | 96.6% |
| 5 Feb 2026, 12:22 | 96.8 | 96.8% |
| 9 Dec 2025, 09:14 | 94.4 | 94.4% |
| 11 Nov 2025, 09:17 | 87.5 | 87.5% |
| 10 Oct 2025, 11:59 | 40.1 | 40.1% |
| 23 Sep 2025, 13:40 | 85.1 | 85.1% |
| 27 Jun 2025, 16:19 | 67 | 67% |
| 9 Apr 2025, 11:24 | 107.7 | 107.7% |
| 19 Mar 2025, 12:23 | 93.6 | 93.6% |
| 7 Feb 2025, 13:28 | 92.1 | 92.1% |
| 8 Jan 2025, 09:34 | 93.4 | 93.4% |
| 2 Dec 2024, 09:32 | 65.1 | 65.1% |
| 6 Nov 2024, 08:48 | 88.5 | 88.5% |
| 13 Jun 2024, 11:56 | 87.5 | 87.5% |
| 3 May 2024, 08:40 | 93.5 | 93.5% |
| 3 Apr 2024, 12:53 | 97.4 | 97.4% |
| 12 Mar 2024, 08:52 | 93.9 | 93.9% |
| 1 Feb 2024, 10:18 | 95.1 | 95.1% |
| 2 Jan 2024, 09:34 | 89.7 | 89.7% |
| 5 Dec 2023, 08:48 | 90.7 | 90.7% |
| 2 Nov 2023, 08:55 | 84.7 | 84.7% |
| 16 Oct 2023, 09:03 | 69 | 69% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.88 mg/l
Sampled 5 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 10:51 | 7.88 | 7.88 mg/l |
| 1 Apr 2026, 08:36 | 10.4 | 10.4 mg/l |
| 18 Mar 2026, 07:47 | 11.5 | 11.5 mg/l |
| 5 Feb 2026, 12:22 | 12.4 | 12.4 mg/l |
| 9 Dec 2025, 09:14 | 11.4 | 11.4 mg/l |
| 11 Nov 2025, 09:17 | 9.88 | 9.88 mg/l |
| 10 Oct 2025, 11:59 | 4.26 | 4.26 mg/l |
| 23 Sep 2025, 13:40 | 9.17 | 9.17 mg/l |
| 27 Jun 2025, 16:19 | 6.65 | 6.65 mg/l |
| 9 Apr 2025, 11:24 | 11.7 | 11.7 mg/l |
| 19 Mar 2025, 12:23 | 10.8 | 10.8 mg/l |
| 7 Feb 2025, 13:28 | 12.1 | 12.1 mg/l |
| 8 Jan 2025, 09:34 | 12.9 | 12.9 mg/l |
| 2 Dec 2024, 09:32 | 7.83 | 7.83 mg/l |
| 6 Nov 2024, 08:48 | 9.76 | 9.76 mg/l |
| 13 Jun 2024, 11:56 | 9.34 | 9.34 mg/l |
| 3 May 2024, 08:40 | 10.2 | 10.2 mg/l |
| 3 Apr 2024, 12:53 | 11.5 | 11.5 mg/l |
| 12 Mar 2024, 08:52 | 11.7 | 11.7 mg/l |
| 1 Feb 2024, 10:18 | 12.1 | 12.1 mg/l |
| 2 Jan 2024, 09:34 | 11.2 | 11.2 mg/l |
| 5 Dec 2023, 08:48 | 11.9 | 11.9 mg/l |
| 2 Nov 2023, 08:55 | 9.89 | 9.89 mg/l |
| 16 Oct 2023, 09:03 | 8.38 | 8.38 mg/l |
Water temperature
code 0076 · °C
11.3 °C
Sampled 5 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 10:51 | 11.3 | 11.3 °C |
| 1 Apr 2026, 08:36 | 8.5 | 8.5 °C |
| 18 Mar 2026, 07:47 | 7.7 | 7.7 °C |
| 5 Feb 2026, 12:22 | 4.7 | 4.7 °C |
| 9 Dec 2025, 09:14 | 7.3 | 7.3 °C |
| 11 Nov 2025, 09:17 | 9.9 | 9.9 °C |
| 10 Oct 2025, 11:59 | 12.5 | 12.5 °C |
| 23 Sep 2025, 13:40 | 11.9 | 11.9 °C |
| 27 Jun 2025, 16:19 | 15.6 | 15.6 °C |
| 9 Apr 2025, 11:24 | 11.6 | 11.6 °C |
| 19 Mar 2025, 12:23 | 8.9 | 8.9 °C |
| 7 Feb 2025, 13:28 | 4 | 4 °C |
| 8 Jan 2025, 09:34 | 1.9 | 1.9 °C |
| 2 Dec 2024, 09:32 | 7.3 | 7.3 °C |
| 6 Nov 2024, 08:48 | 10.9 | 10.9 °C |
| 13 Jun 2024, 11:56 | 12.3 | 12.3 °C |
| 3 May 2024, 08:40 | 11.2 | 11.2 °C |
| 3 Apr 2024, 12:53 | 8 | 8 °C |
| 12 Mar 2024, 08:52 | 6 | 6 °C |
| 1 Feb 2024, 10:18 | 5.2 | 5.2 °C |
| 2 Jan 2024, 09:34 | 5.9 | 5.9 °C |
| 5 Dec 2023, 08:48 | 4 | 4 °C |
| 2 Nov 2023, 08:55 | 8.5 | 8.5 °C |
| 16 Oct 2023, 09:03 | 6.9 | 6.9 °C |
pH
code 0061
7.54
Sampled 5 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 10:51 | 7.54 | 7.54 |
| 1 Apr 2026, 08:36 | 7.27 | 7.27 |
| 18 Mar 2026, 07:47 | 7.63 | 7.63 |
| 5 Feb 2026, 12:22 | 7.59 | 7.59 |
| 9 Dec 2025, 09:14 | 7.1 | 7.1 |
| 11 Nov 2025, 09:17 | 7.69 | 7.69 |
| 10 Oct 2025, 11:59 | 7.04 | 7.04 |
| 23 Sep 2025, 13:40 | 7.17 | 7.17 |
| 27 Jun 2025, 16:19 | 6.93 | 6.93 |
| 9 Apr 2025, 11:24 | 7.55 | 7.55 |
| 19 Mar 2025, 12:23 | 7.38 | 7.38 |
| 7 Feb 2025, 13:28 | 7.38 | 7.38 |
| 8 Jan 2025, 09:34 | 7.08 | 7.08 |
| 2 Dec 2024, 09:32 | 7.08 | 7.08 |
| 6 Nov 2024, 08:48 | 7.39 | 7.39 |
| 13 Jun 2024, 11:56 | 7.07 | 7.07 |
| 3 May 2024, 08:40 | 7.61 | 7.61 |
| 3 Apr 2024, 12:53 | 7.16 | 7.16 |
| 12 Mar 2024, 08:52 | 7.21 | 7.21 |
| 1 Feb 2024, 10:18 | 7.21 | 7.21 |
| 2 Jan 2024, 09:34 | 6.9 | 6.9 |
| 5 Dec 2023, 08:48 | 7.15 | 7.15 |
| 2 Nov 2023, 08:55 | 6.97 | 6.97 |
| 16 Oct 2023, 09:03 | 7.4 | 7.4 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.014 mg/l
Sampled 5 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 10:51 | 0.014 | 0.014 mg/l |
| 1 Apr 2026, 08:36 | 0.0022 | 0.0022 mg/l |
| 18 Mar 2026, 07:47 | 0.011 | 0.011 mg/l |
| 5 Feb 2026, 12:22 | 0.024 | 0.024 mg/l |
| 9 Dec 2025, 09:14 | 0.097 | 0.097 mg/l |
| 11 Nov 2025, 09:17 | 0.0073 | 0.0073 mg/l |
| 10 Oct 2025, 11:59 | 0.011 | 0.011 mg/l |
| 23 Sep 2025, 13:40 | 0.012 | 0.012 mg/l |
| 27 Jun 2025, 16:19 | 0.017 | 0.017 mg/l |
| 9 Apr 2025, 11:24 | 0.0084 | 0.0084 mg/l |
| 19 Mar 2025, 12:23 | 0.016 | 0.016 mg/l |
| 7 Feb 2025, 13:28 | 0.12 | 0.12 mg/l |
| 8 Jan 2025, 09:34 | 0.14 | 0.14 mg/l |
| 2 Dec 2024, 09:32 | 0.09 | 0.09 mg/l |
| 6 Nov 2024, 08:48 | 0.014 | 0.014 mg/l |
| 13 Jun 2024, 11:56 | 0.029 | 0.029 mg/l |
| 3 May 2024, 08:40 | 0.01 | 0.01 mg/l |
| 3 Apr 2024, 12:53 | 0.026 | 0.026 mg/l |
| 12 Mar 2024, 08:52 | 0.036 | 0.036 mg/l |
| 1 Feb 2024, 10:18 | 0.095 | 0.095 mg/l |
| 2 Jan 2024, 09:34 | 0.11 | 0.11 mg/l |
| 5 Dec 2023, 08:48 | 0.08 | 0.08 mg/l |
| 2 Nov 2023, 08:55 | 0.04 | 0.04 mg/l |
| 16 Oct 2023, 09:03 | 0.013 | 0.013 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.897 mg/l
Sampled 5 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 10:51 | 0.897 | 0.897 mg/l |
| 1 Apr 2026, 08:36 | 0.358 | 0.358 mg/l |
| 18 Mar 2026, 07:47 | 0.316 | 0.316 mg/l |
| 5 Feb 2026, 12:22 | 0.582 | 0.582 mg/l |
| 9 Dec 2025, 09:14 | 0.454 | 0.454 mg/l |
| 11 Nov 2025, 09:17 | 0.387 | 0.387 mg/l |
| 10 Oct 2025, 11:59 | 0.246 | 0.246 mg/l |
| 23 Sep 2025, 13:40 | 0.286 | 0.286 mg/l |
| 27 Jun 2025, 16:19 | 1.09 | 1.09 mg/l |
| 9 Apr 2025, 11:24 | 0.724 | 0.724 mg/l |
| 19 Mar 2025, 12:23 | 0.737 | 0.737 mg/l |
| 7 Feb 2025, 13:28 | 0.715 | 0.715 mg/l |
| 8 Jan 2025, 09:34 | 0.502 | 0.502 mg/l |
| 2 Dec 2024, 09:32 | 0.385 | 0.385 mg/l |
| 6 Nov 2024, 08:48 | 0.305 | 0.305 mg/l |
| 13 Jun 2024, 11:56 | 0.474 | 0.474 mg/l |
| 3 May 2024, 08:40 | 0.157 | 0.157 mg/l |
| 3 Apr 2024, 12:53 | 0.273 | 0.273 mg/l |
| 12 Mar 2024, 08:52 | 0.383 | 0.383 mg/l |
| 1 Feb 2024, 10:18 | 0.488 | 0.488 mg/l |
| 2 Jan 2024, 09:34 | 0.464 | 0.464 mg/l |
| 5 Dec 2023, 08:48 | 1.29 | 1.29 mg/l |
| 2 Nov 2023, 08:55 | 0.351 | 0.351 mg/l |
| 16 Oct 2023, 09:03 | 0.448 | 0.448 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.35 mg/l
Sampled 5 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 10:51 | 0.35 | 0.35 mg/l |
| 1 Apr 2026, 08:36 | 0.047 | 0.047 mg/l |
| 18 Mar 2026, 07:47 | 0.04 | 0.04 mg/l |
| 5 Feb 2026, 12:22 | 0.09 | 0.09 mg/l |
| 9 Dec 2025, 09:14 | 0.032 | 0.032 mg/l |
| 11 Nov 2025, 09:17 | 0.08 | 0.08 mg/l |
| 10 Oct 2025, 11:59 | 0.045 | 0.045 mg/l |
| 23 Sep 2025, 13:40 | 0.044 | 0.044 mg/l |
| 9 Apr 2025, 11:24 | 0.12 | 0.12 mg/l |
| 19 Mar 2025, 12:23 | 0.21 | 0.21 mg/l |
| 7 Feb 2025, 13:28 | 0.088 | 0.088 mg/l |
| 8 Jan 2025, 09:34 | 0.025 | 0.025 mg/l |
| 2 Dec 2024, 09:32 | 0.056 | 0.056 mg/l |
| 6 Nov 2024, 08:48 | 0.078 | 0.078 mg/l |
| 13 Jun 2024, 11:56 | 0.1 | 0.1 mg/l |
| 3 May 2024, 08:40 | 0.053 | 0.053 mg/l |
| 3 Apr 2024, 12:53 | 0.024 | 0.024 mg/l |
| 12 Mar 2024, 08:52 | 0.044 | 0.044 mg/l |
| 1 Feb 2024, 10:18 | 0.02 | 0.02 mg/l |
| 2 Jan 2024, 09:34 | 0.027 | 0.027 mg/l |
| 5 Dec 2023, 08:48 | 0.11 | 0.11 mg/l |
| 2 Nov 2023, 08:55 | 0.059 | 0.059 mg/l |
| 16 Oct 2023, 09:03 | 0.11 | 0.11 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
284 µS/cm
Sampled 5 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 10:51 | 284 | 284 µS/cm |
| 1 Apr 2026, 08:36 | 270 | 270 µS/cm |
| 18 Mar 2026, 07:47 | 239 | 239 µS/cm |
| 5 Feb 2026, 12:22 | 244 | 244 µS/cm |
| 9 Dec 2025, 09:14 | 221 | 221 µS/cm |
| 11 Nov 2025, 09:17 | 232 | 232 µS/cm |
| 10 Oct 2025, 11:59 | 239 | 239 µS/cm |
| 23 Sep 2025, 13:40 | 164 | 164 µS/cm |
| 27 Jun 2025, 16:19 | 253 | 253 µS/cm |
| 9 Apr 2025, 11:24 | 307 | 307 µS/cm |
| 19 Mar 2025, 12:23 | 277 | 277 µS/cm |
| 7 Feb 2025, 13:28 | 238 | 238 µS/cm |
| 8 Jan 2025, 09:34 | 204 | 204 µS/cm |
| 2 Dec 2024, 09:32 | 210 | 210 µS/cm |
| 6 Nov 2024, 08:48 | 224 | 224 µS/cm |
| 13 Jun 2024, 11:56 | 228 | 228 µS/cm |
| 3 May 2024, 08:40 | 247 | 247 µS/cm |
| 3 Apr 2024, 12:53 | 209 | 209 µS/cm |
| 12 Mar 2024, 08:52 | 227 | 227 µS/cm |
| 1 Feb 2024, 10:18 | 223 | 223 µS/cm |
| 2 Jan 2024, 09:34 | 219 | 219 µS/cm |
| 5 Dec 2023, 08:48 | 219 | 219 µS/cm |
| 2 Nov 2023, 08:55 | 223 | 223 µS/cm |
| 16 Oct 2023, 09:03 | 226 | 226 µS/cm |
Everything measured here
114 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 114 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 24 | Oct 2023 – May 2026 | 72.1% 5 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Oct 2023 – May 2026 | 7.88 mg/l 5 May 2026 |
| Temperature of Water 0076 | River water | 24 | Oct 2023 – May 2026 | 11.3 °C 5 May 2026 |
| pH 0061 | River water | 24 | Oct 2023 – May 2026 | 7.54 5 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Oct 2023 – May 2026 | 0.014 mg/l 5 May 2026 |
| Nitrate as N 0117 | River water | 24 | Oct 2023 – May 2026 | 0.897 mg/l 5 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 23 | Oct 2023 – May 2026 | 0.35 mg/l 5 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Oct 2023 – May 2026 | 284 µS/cm 5 May 2026 |
| (Perfluorohexanesulfonyl)[3-(trimethylazaniumyl)propyl]azanide 2890 | River water | 1 | Mar 2026 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| 10:2 Fluorotelomer sulfonic acid 2994 | River water | 2 | Sep 2025 – Mar 2026 | below 0.002 µg/l 18 Mar 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| 2H-Perfluoro-2-decenoic acid 2888 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Sep 2025 – Mar 2026 | below 0.004 µg/l 18 Mar 2026 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| 5:1:2 Fluorotelomer betaine 2887 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| 5:3 Fluorotelomer betaine 2886 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| 6:2 Fluorotelomer phosphate diester 2986 | River water | 2 | Sep 2025 – Mar 2026 | below 0.004 µg/l 18 Mar 2026 |
| 6:2 Fluorotelomer sulfonamide amine oxide (6:2 FTNO) (Capstone A) 2841 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| 6:2 Fluorotelomer sulfonamide betaine 2985 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| 6:2/8:2 Fluorotelomer phosphate diester 2884 | River water | 2 | Sep 2025 – Mar 2026 | below 0.01 µg/l 18 Mar 2026 |
| 6:6 Perfluorophosphinic acid 2883 | River water | 2 | Sep 2025 – Mar 2026 | below 0.004 µg/l 18 Mar 2026 |
| 6:8 Perfluorophosphinic acid 2882 | River water | 2 | Sep 2025 – Mar 2026 | below 0.01 µg/l 18 Mar 2026 |
| 8:2 Fluorotelomer phosphate diester 2880 | River water | 1 | Mar 2026 – Mar 2026 | below 0.004 µg/l 18 Mar 2026 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| 8:8 Perfluorophosphinic acid 2879 | River water | 2 | Sep 2025 – Mar 2026 | below 0.01 µg/l 18 Mar 2026 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Oct 2023 – May 2026 | 57 mg/l 5 May 2026 |
| Aluminium, Dissolved 6037 | River water | 4 | Apr 2025 – May 2026 | 63 µg/l 5 May 2026 |
| Aminomethylphosphonic acid 7125 | River water | 9 | Apr 2025 – May 2026 | below 0.1 µg/l 5 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Oct 2023 – May 2026 | 0.0001 mg/l 5 May 2026 |
| Barium, Dissolved 9446 | River water | 4 | Apr 2025 – May 2026 | 38 µg/l 5 May 2026 |
| Boron, Dissolved 9447 | River water | 4 | Apr 2025 – May 2026 | below 100 µg/l 5 May 2026 |
| Cadmium, Dissolved 0106 | River water | 4 | Apr 2025 – May 2026 | below 0.01 µg/l 5 May 2026 |
| Calcium, Dissolved 0239 | River water | 4 | Apr 2025 – May 2026 | 33 mg/l 5 May 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 14 | Nov 2024 – May 2026 | 9.3 mg/l 5 May 2026 |
| Chloride 0172 | River water | 24 | Oct 2023 – May 2026 | 26 mg/l 5 May 2026 |
| Chromium, Dissolved 3409 | River water | 4 | Apr 2025 – May 2026 | below 0.5 µg/l 5 May 2026 |
| Copper : BLM Bioavailable 4821 | River water | 3 | Apr 2025 – May 2026 | 0.04 µg/l 5 May 2026 |
| Copper, Dissolved 6450 | River water | 4 | Apr 2025 – May 2026 | 1.8 µg/l 5 May 2026 |
| eDNA Report 3047 | River water | 2 | May 2024 – Jan 2025 | 1 text result 8 Jan 2025 |
| Environmental DNA Filtration 3064 | River water | 1 | May 2024 – May 2024 | DNA Stored 3 May 2024 |
| Flow Type 2896 | River water | 29 | Oct 2023 – May 2026 | Ponded / Still 5 May 2026 |
| Glyphosate 3007 | River water | 9 | Apr 2025 – May 2026 | below 0.1 µg/l 5 May 2026 |
| Hardness, Calcium 0163 | River water | 4 | Apr 2025 – May 2026 | 82.4 mg/l 5 May 2026 |
| Hardness, Total as CaCO3 0158 | River water | 4 | Apr 2025 – May 2026 | 103 mg/l 5 May 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| Hexafluoropropylene oxide trimer acid 2980 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| Iron, Dissolved 6460 | River water | 4 | Apr 2025 – May 2026 | 73 µg/l 5 May 2026 |
| LCMS Screen : Semi Quantitative 7299 | River water | 7 | Feb 2025 – Apr 2026 | 1 text result 1 Apr 2026 |
| Lead : BLM Bioavailable 3377 | River water | 3 | Apr 2025 – May 2026 | 0.02 µg/l 5 May 2026 |
| Lead, Dissolved 0052 | River water | 4 | Apr 2025 – May 2026 | 0.15 µg/l 5 May 2026 |
| Lithium, Dissolved 4201 | River water | 4 | Apr 2025 – May 2026 | below 100 µg/l 5 May 2026 |
| Magnesium, Dissolved 0235 | River water | 4 | Apr 2025 – May 2026 | 4.9 mg/l 5 May 2026 |
| Manganese : BLM Bioavailable 4820 | River water | 3 | Apr 2025 – May 2026 | 110 µg/l 5 May 2026 |
| Manganese, Dissolved 6458 | River water | 4 | Apr 2025 – May 2026 | 280 µg/l 5 May 2026 |
| Mitochondrial marker : Fish 12S 2857 | River water | 2 | May 2024 – Jan 2025 | Not found 8 Jan 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Sep 2025 – Mar 2026 | below 0.002 µg/l 18 Mar 2026 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Sep 2025 – Mar 2026 | below 0.002 µg/l 18 Mar 2026 |
| Nickel : BLM Bioavailable 3878 | River water | 3 | Apr 2025 – May 2026 | 0.31 µg/l 5 May 2026 |
| Nickel, Dissolved 3410 | River water | 4 | Apr 2025 – May 2026 | 1.3 µg/l 5 May 2026 |
| Nitrite as N 0118 | River water | 24 | Oct 2023 – May 2026 | 0.0027 mg/l 5 May 2026 |
| Nitrogen, Total as N 9686 | River water | 23 | Oct 2023 – May 2026 | 1.7 mg/l 5 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Oct 2023 – May 2026 | 0.9 mg/l 5 May 2026 |
| No flow /No sample 7668 | River water | 10 | Jul 2024 – Jan 2026 | No flow/discharge at sampling point 5 Jan 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Perfluorobutanesulfonic acid 2972 | River water | 1 | Mar 2026 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| Perfluorobutanoic acid 2995 | River water | 2 | Sep 2025 – Mar 2026 | 0.0024 µg/l 18 Mar 2026 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| Perfluorodecanoic acid 8892 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Sep 2025 – Mar 2026 | below 0.005 µg/l 18 Mar 2026 |
| Perfluorododecanoic acid 8894 | River water | 2 | Sep 2025 – Mar 2026 | below 0.002 µg/l 18 Mar 2026 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| Perfluorohexane sulfonamido amine 2874 | River water | 1 | Mar 2026 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Perfluorohexanoic acid 8888 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Perfluorononanoic acid 8891 | River water | 1 | Mar 2026 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Sep 2025 – Mar 2026 | below 0.002 µg/l 18 Mar 2026 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Sep 2025 – Mar 2026 | 0.00077 µg/l 18 Mar 2026 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Perfluorooctanesulfonic acid (total) 2958 | River water | 2 | Sep 2025 – Mar 2026 | 0.0011 µg/l 18 Mar 2026 |
| Perfluorooctanoic acid 8890 | River water | 2 | Sep 2025 – Mar 2026 | 0.0021 µg/l 18 Mar 2026 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Sep 2025 – Mar 2026 | below 0.0005 µg/l 18 Mar 2026 |
| Perfluoropentanoic acid 8887 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Sep 2025 – Mar 2026 | below 0.006 µg/l 18 Mar 2026 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Sep 2025 – Mar 2026 | below 0.002 µg/l 18 Mar 2026 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Sep 2025 – Mar 2026 | below 0.004 µg/l 18 Mar 2026 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Sep 2025 – Mar 2026 | below 0.001 µg/l 18 Mar 2026 |
| Phosphorus, Total as P 0348 | River water | 24 | Oct 2023 – May 2026 | 0.3 mg/l 5 May 2026 |
| Potassium, Dissolved 0209 | River water | 4 | Apr 2025 – May 2026 | 1.7 mg/l 5 May 2026 |
| Preparation: DNA 5923 | River water | 1 | May 2024 – May 2024 | Done 3 May 2024 |
| Silica, reactive as SiO2 0182 | River water | 24 | Oct 2023 – May 2026 | 5.3 mg/l 5 May 2026 |
| Sodium, Dissolved 0205 | River water | 4 | Apr 2025 – May 2026 | 14 mg/l 5 May 2026 |
| Solids, Suspended at 105 C 0135 | River water | 24 | Oct 2023 – May 2026 | 35 mg/l 5 May 2026 |
| Strontium, Filtered 6693 | River water | 4 | Apr 2025 – May 2026 | 140 µg/l 5 May 2026 |
| Sulphate, Dissolved as SO4 7859 | River water | 4 | Apr 2025 – May 2026 | 38 mg/l 5 May 2026 |
| Zinc : BLM Bioavailable 4822 | River water | 3 | Apr 2025 – May 2026 | 1.4 µg/l 5 May 2026 |
| Zinc, Dissolved 3408 | River water | 4 | Apr 2025 – May 2026 | 5.2 µg/l 5 May 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.