Marlbank Brook, Castlemorton Common
EA name: MARLBANK BROOK, CASTLEMORTON COMMON (also listed as “RSN1678 MARLBANK BROOK, CASTLEMORTON COMMON”)
Environment Agency sampling point MD-RSN1678 · 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 Sep 2026, 12:5313 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 37 since 8 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) · results completed 22 Sep 2026
- Where
- National Grid 378374, 239087As published, to the nearest 1 m. Open in a map
- River, by its own name
- Marlbank Brook
- River, by the map
- Marlbank BrookPlaced on the river its name gives, 237 m from the line.
- Next gauge downstream
- Mythe Bridge On the River Severn · 17 km along the river
- Why it was sampled
- Monitoring (national agency policy) (37 samples)
Results here were completed a median of 9 days after the sample was taken (2 to 34 days, 22 samples). 12 visits found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
90.4%
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 10:26 | 90.4 | 90.4% |
| 27 Apr 2026, 13:30 | 101.8 | 101.8% |
| 27 Apr 2026, 13:29 | 102.7 | 102.7% |
| 7 Apr 2026, 13:59 | 109.3 | 109.3% |
| 18 Mar 2026, 12:46 | 101.1 | 101.1% |
| 6 Mar 2026, 12:42 | 98.3 | 98.3% |
| 25 Feb 2026, 12:58 | 103.1 | 103.1% |
| 10 Feb 2026, 08:47 | 95.9 | 95.9% |
| 20 Jan 2026, 14:00 | 98.6 | 98.6% |
| 16 Jan 2026, 14:03 | 97.9 | 97.9% |
| 18 Dec 2025, 14:06 | 94.5 | 94.5% |
| 9 Dec 2025, 13:43 | 93.2 | 93.2% |
| 17 Nov 2025, 13:05 | 89.5 | 89.5% |
| 12 Nov 2025, 12:55 | 72 | 72% |
| 9 May 2025, 13:31 | 95.4 | 95.4% |
| 4 Apr 2025, 12:48 | 109.6 | 109.6% |
| 18 Mar 2025, 12:33 | 104.9 | 104.9% |
| 12 Feb 2025, 10:07 | 98.4 | 98.4% |
| 28 Jan 2025, 14:05 | 98.4 | 98.4% |
| 16 Dec 2024, 09:42 | 92.4 | 92.4% |
| 27 Nov 2024, 12:35 | 95.8 | 95.8% |
| 21 Oct 2024, 12:42 | 95.5 | 95.5% |
| 26 Sep 2024, 13:26 | 94.7 | 94.7% |
| 25 Jun 2024, 09:35 | 69 | 69% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.1 mg/l
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 10:26 | 10.1 | 10.1 mg/l |
| 27 Apr 2026, 13:30 | 10.2 | 10.2 mg/l |
| 27 Apr 2026, 13:29 | 10.4 | 10.4 mg/l |
| 7 Apr 2026, 13:59 | 11.5 | 11.5 mg/l |
| 18 Mar 2026, 12:46 | 11.1 | 11.1 mg/l |
| 6 Mar 2026, 12:42 | 11.6 | 11.6 mg/l |
| 25 Feb 2026, 12:58 | 11.4 | 11.4 mg/l |
| 10 Feb 2026, 08:47 | 11.5 | 11.5 mg/l |
| 20 Jan 2026, 14:00 | 11.9 | 11.9 mg/l |
| 16 Jan 2026, 14:03 | 12 | 12 mg/l |
| 18 Dec 2025, 14:06 | 10.9 | 10.9 mg/l |
| 9 Dec 2025, 13:43 | 10.2 | 10.2 mg/l |
| 17 Nov 2025, 13:05 | 10.5 | 10.5 mg/l |
| 12 Nov 2025, 12:55 | 7.58 | 7.58 mg/l |
| 9 May 2025, 13:31 | 10.1 | 10.1 mg/l |
| 4 Apr 2025, 12:48 | 11.6 | 11.6 mg/l |
| 18 Mar 2025, 12:33 | 12.7 | 12.7 mg/l |
| 12 Feb 2025, 10:07 | 12.5 | 12.5 mg/l |
| 28 Jan 2025, 14:05 | 11.6 | 11.6 mg/l |
| 16 Dec 2024, 09:42 | 10.8 | 10.8 mg/l |
| 27 Nov 2024, 12:35 | 11.7 | 11.7 mg/l |
| 21 Oct 2024, 12:42 | 10.3 | 10.3 mg/l |
| 26 Sep 2024, 13:26 | 9.55 | 9.55 mg/l |
| 25 Jun 2024, 09:35 | 6.56 | 6.56 mg/l |
Water temperature
code 0076 · °C
10.3 °C
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 10:26 | 10.3 | 10.3 °C |
| 27 Apr 2026, 13:30 | 15 | 15 °C |
| 27 Apr 2026, 13:29 | 14.6 | 14.6 °C |
| 7 Apr 2026, 13:59 | 12.9 | 12.9 °C |
| 18 Mar 2026, 12:46 | 11.2 | 11.2 °C |
| 6 Mar 2026, 12:42 | 8.2 | 8.2 °C |
| 25 Feb 2026, 12:58 | 10.9 | 10.9 °C |
| 10 Feb 2026, 08:47 | 7.6 | 7.6 °C |
| 20 Jan 2026, 14:00 | 7.3 | 7.3 °C |
| 16 Jan 2026, 14:03 | 6.6 | 6.6 °C |
| 18 Dec 2025, 14:06 | 8.9 | 8.9 °C |
| 9 Dec 2025, 13:43 | 11.3 | 11.3 °C |
| 17 Nov 2025, 13:05 | 8.2 | 8.2 °C |
| 12 Nov 2025, 12:55 | 12.9 | 12.9 °C |
| 9 May 2025, 13:31 | 12.5 | 12.5 °C |
| 4 Apr 2025, 12:48 | 12.6 | 12.6 °C |
| 18 Mar 2025, 12:33 | 6.9 | 6.9 °C |
| 12 Feb 2025, 10:07 | 5.1 | 5.1 °C |
| 28 Jan 2025, 14:05 | 8 | 8 °C |
| 16 Dec 2024, 09:42 | 8.5 | 8.5 °C |
| 27 Nov 2024, 12:35 | 6.6 | 6.6 °C |
| 21 Oct 2024, 12:42 | 12 | 12 °C |
| 26 Sep 2024, 13:26 | 14.9 | 14.9 °C |
| 25 Jun 2024, 09:35 | 17.7 | 17.7 °C |
pH
code 0061
7.41
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 10:26 | 7.41 | 7.41 |
| 27 Apr 2026, 13:30 | 7.93 | 7.93 |
| 27 Apr 2026, 13:29 | 7.93 | 7.93 |
| 7 Apr 2026, 13:59 | 8.01 | 8.01 |
| 18 Mar 2026, 12:46 | 7.83 | 7.83 |
| 6 Mar 2026, 12:42 | 7.95 | 7.95 |
| 25 Feb 2026, 12:58 | 8.02 | 8.02 |
| 10 Feb 2026, 08:47 | 7.61 | 7.61 |
| 20 Jan 2026, 14:00 | 7.85 | 7.85 |
| 16 Jan 2026, 14:03 | 7.72 | 7.72 |
| 18 Dec 2025, 14:06 | 7.61 | 7.61 |
| 9 Dec 2025, 13:43 | 7.83 | 7.83 |
| 17 Nov 2025, 13:05 | 7.56 | 7.56 |
| 12 Nov 2025, 12:55 | 7.14 | 7.14 |
| 9 May 2025, 13:31 | 8.04 | 8.04 |
| 4 Apr 2025, 12:48 | 8.09 | 8.09 |
| 18 Mar 2025, 12:33 | 8.16 | 8.16 |
| 12 Feb 2025, 10:07 | 7.82 | 7.82 |
| 28 Jan 2025, 14:05 | 7.84 | 7.84 |
| 16 Dec 2024, 09:42 | 7.69 | 7.69 |
| 27 Nov 2024, 12:35 | 8.01 | 8.01 |
| 21 Oct 2024, 12:42 | 7.76 | 7.76 |
| 26 Sep 2024, 13:26 | 7.64 | 7.64 |
| 25 Jun 2024, 09:35 | 7.86 | 7.86 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.039 mg/l
Sampled 7 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 10:26 | 0.039 | 0.039 mg/l |
| 27 Apr 2026, 13:30 | 0.033 | 0.033 mg/l |
| 27 Apr 2026, 13:29 | 0.035 | 0.035 mg/l |
| 18 Mar 2026, 12:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Mar 2026, 12:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Feb 2026, 12:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Feb 2026, 08:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jan 2026, 14:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jan 2026, 14:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Dec 2025, 14:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Dec 2025, 13:43 | 0.075 | 0.075 mg/l |
| 17 Nov 2025, 13:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Nov 2025, 12:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 May 2025, 13:31 | 0.15 | 0.15 mg/l |
| 4 Apr 2025, 12:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Mar 2025, 12:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Feb 2025, 10:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Jan 2025, 14:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Dec 2024, 09:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Nov 2024, 12:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Oct 2024, 12:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Sep 2024, 13:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Jun 2024, 09:35 | 0.21 | 0.21 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
0.204 mg/l
Sampled 7 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 10:26 | 0.204 | 0.204 mg/l |
| 27 Apr 2026, 13:30 | 0.206 | 0.206 mg/l |
| 27 Apr 2026, 13:29 | 0.196 | 0.196 mg/l |
| 18 Mar 2026, 12:46 | 0.306 | 0.306 mg/l |
| 6 Mar 2026, 12:42 | 0.326 | 0.326 mg/l |
| 25 Feb 2026, 12:58 | 0.336 | 0.336 mg/l |
| 10 Feb 2026, 08:47 | 0.386 | 0.386 mg/l |
| 20 Jan 2026, 14:00 | 0.566 | 0.566 mg/l |
| 16 Jan 2026, 14:03 | 0.626 | 0.626 mg/l |
| 18 Dec 2025, 14:06 | 0.436 | 0.436 mg/l |
| 9 Dec 2025, 13:43 | 0.486 | 0.486 mg/l |
| 17 Nov 2025, 13:05 | 0.996 | 0.996 mg/l |
| 12 Nov 2025, 12:55 | 4.78 | 4.78 mg/l |
| 9 May 2025, 13:31 | 0.379 | 0.379 mg/l |
| 4 Apr 2025, 12:48 | <0.196 | below 0.196 mg/l (not detected above this) |
| 18 Mar 2025, 12:33 | 0.446 | 0.446 mg/l |
| 12 Feb 2025, 10:07 | 0.516 | 0.516 mg/l |
| 28 Jan 2025, 14:05 | 0.416 | 0.416 mg/l |
| 16 Dec 2024, 09:42 | 0.286 | 0.286 mg/l |
| 27 Nov 2024, 12:35 | 0.316 | 0.316 mg/l |
| 21 Oct 2024, 12:42 | <0.196 | below 0.196 mg/l (not detected above this) |
| 26 Sep 2024, 13:26 | <0.196 | below 0.196 mg/l (not detected above this) |
| 25 Jun 2024, 09:35 | 0.165 | 0.165 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.036 mg/l
Sampled 7 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 10:26 | 0.036 | 0.036 mg/l |
| 27 Apr 2026, 13:30 | 0.035 | 0.035 mg/l |
| 27 Apr 2026, 13:29 | 0.027 | 0.027 mg/l |
| 18 Mar 2026, 12:46 | 0.046 | 0.046 mg/l |
| 6 Mar 2026, 12:42 | 0.04 | 0.04 mg/l |
| 25 Feb 2026, 12:58 | 0.039 | 0.039 mg/l |
| 10 Feb 2026, 08:47 | 0.031 | 0.031 mg/l |
| 20 Jan 2026, 14:00 | 0.045 | 0.045 mg/l |
| 16 Jan 2026, 14:03 | 0.043 | 0.043 mg/l |
| 18 Dec 2025, 14:06 | 0.044 | 0.044 mg/l |
| 9 Dec 2025, 13:43 | 0.039 | 0.039 mg/l |
| 17 Nov 2025, 13:05 | 0.033 | 0.033 mg/l |
| 12 Nov 2025, 12:55 | 0.019 | 0.019 mg/l |
| 9 May 2025, 13:31 | 0.077 | 0.077 mg/l |
| 4 Apr 2025, 12:48 | 0.022 | 0.022 mg/l |
| 18 Mar 2025, 12:33 | 0.033 | 0.033 mg/l |
| 12 Feb 2025, 10:07 | 0.044 | 0.044 mg/l |
| 28 Jan 2025, 14:05 | 0.059 | 0.059 mg/l |
| 16 Dec 2024, 09:42 | 0.046 | 0.046 mg/l |
| 27 Nov 2024, 12:35 | 0.052 | 0.052 mg/l |
| 21 Oct 2024, 12:42 | 0.052 | 0.052 mg/l |
| 26 Sep 2024, 13:26 | 0.054 | 0.054 mg/l |
| 25 Jun 2024, 09:35 | 0.16 | 0.16 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
830 µS/cm
Sampled 7 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 May 2026, 10:26 | 830 | 830 µS/cm |
| 27 Apr 2026, 13:30 | 852 | 852 µS/cm |
| 27 Apr 2026, 13:29 | 848 | 848 µS/cm |
| 7 Apr 2026, 13:59 | 635 | 635 µS/cm |
| 18 Mar 2026, 12:46 | 407 | 407 µS/cm |
| 6 Mar 2026, 12:42 | 349 | 349 µS/cm |
| 25 Feb 2026, 12:58 | 292 | 292 µS/cm |
| 10 Feb 2026, 08:47 | 183 | 183 µS/cm |
| 20 Jan 2026, 14:00 | 209 | 209 µS/cm |
| 16 Jan 2026, 14:03 | 231 | 231 µS/cm |
| 18 Dec 2025, 14:06 | 231 | 231 µS/cm |
| 9 Dec 2025, 13:43 | 210 | 210 µS/cm |
| 17 Nov 2025, 13:05 | 404 | 404 µS/cm |
| 12 Nov 2025, 12:55 | 861 | 861 µS/cm |
| 9 May 2025, 13:31 | 1112 | 1112 µS/cm |
| 4 Apr 2025, 12:48 | 691 | 691 µS/cm |
| 18 Mar 2025, 12:33 | 539 | 539 µS/cm |
| 12 Feb 2025, 10:07 | 355 | 355 µS/cm |
| 28 Jan 2025, 14:05 | 171 | 171 µS/cm |
| 16 Dec 2024, 09:42 | 412 | 412 µS/cm |
| 27 Nov 2024, 12:35 | 182 | 182 µS/cm |
| 21 Oct 2024, 12:42 | 236 | 236 µS/cm |
| 26 Sep 2024, 13:26 | 198 | 198 µS/cm |
| 25 Jun 2024, 09:35 | 1166 | 1166 µS/cm |
Everything measured here
68 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 68 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 24 | Jun 2024 – May 2026 | 90.4% 7 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Jun 2024 – May 2026 | 10.1 mg/l 7 May 2026 |
| Temperature of Water 0076 | River water | 24 | Jun 2024 – May 2026 | 10.3 °C 7 May 2026 |
| pH 0061 | River water | 24 | Jun 2024 – May 2026 | 7.41 7 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 23 | Jun 2024 – May 2026 | 0.039 mg/l 7 May 2026 |
| Nitrate as N 0117 | River water | 23 | Jun 2024 – May 2026 | 0.204 mg/l 7 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 23 | Jun 2024 – May 2026 | 0.036 mg/l 7 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Jun 2024 – May 2026 | 830 µS/cm 7 May 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Nov 2023 – Feb 2025 | below 0.001 µg/l 12 Feb 2025 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 1 | Nov 2023 – Nov 2023 | below 0.001 µg/l 8 Nov 2023 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Nov 2023 – Feb 2025 | below 0.001 µg/l 12 Feb 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Nov 2023 – Feb 2025 | below 0.002 µg/l 12 Feb 2025 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Nov 2023 – Feb 2025 | below 0.001 µg/l 12 Feb 2025 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Nov 2023 – Feb 2025 | below 0.004 µg/l 12 Feb 2025 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Nov 2023 – Feb 2025 | below 0.005 µg/l 12 Feb 2025 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Nov 2023 – Feb 2025 | below 0.001 µg/l 12 Feb 2025 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 1 | Nov 2023 – Nov 2023 | below 0.001 µg/l 8 Nov 2023 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 23 | Jun 2024 – May 2026 | 260 mg/l 7 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 23 | Jun 2024 – May 2026 | 0.00019 mg/l 7 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – May 2026 | 1.3 mg/l 7 May 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 11 | Jan 2025 – Apr 2026 | 6.9 mg/l 27 Apr 2026 |
| Chloride 0172 | River water | 11 | Jan 2025 – Apr 2026 | 17 mg/l 27 Apr 2026 |
| Flow Type 2896 | River water | 19 | Jan 2025 – Sep 2026 | Dry 18 Sep 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Nov 2023 – Feb 2025 | below 0.001 µg/l 12 Feb 2025 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Nov 2023 – Feb 2025 | below 0.002 µg/l 12 Feb 2025 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Nov 2023 – Feb 2025 | below 0.002 µg/l 12 Feb 2025 |
| Nitrite as N 0118 | River water | 23 | Jun 2024 – May 2026 | 0.0061 mg/l 7 May 2026 |
| Nitrogen, Total as N 9686 | River water | 11 | Jan 2025 – Apr 2026 | 0.66 mg/l 27 Apr 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 23 | Jun 2024 – May 2026 | 0.21 mg/l 7 May 2026 |
| No flow /No sample 7668 | River water | 12 | Aug 2024 – Sep 2026 | No flow/discharge at sampling point 18 Sep 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Nov 2023 – Feb 2025 | below 0.001 µg/l 12 Feb 2025 |
| Perfluorobutanoic acid 2995 | River water | 2 | Nov 2023 – Feb 2025 | 0.0014 µg/l 12 Feb 2025 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Nov 2023 – Feb 2025 | below 0.002 µg/l 12 Feb 2025 |
| Perfluorodecanoic acid 8892 | River water | 2 | Nov 2023 – Feb 2025 | below 0.002 µg/l 12 Feb 2025 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Nov 2023 – Feb 2025 | below 0.005 µg/l 12 Feb 2025 |
| Perfluorododecanoic acid 8894 | River water | 2 | Nov 2023 – Feb 2025 | below 0.002 µg/l 12 Feb 2025 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Nov 2023 – Feb 2025 | below 0.001 µg/l 12 Feb 2025 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluorohexanoic acid 8888 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluorononanoic acid 8891 | River water | 2 | Nov 2023 – Feb 2025 | below 0.001 µg/l 12 Feb 2025 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Nov 2023 – Feb 2025 | below 0.002 µg/l 12 Feb 2025 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Nov 2023 – Feb 2025 | below 0.001 µg/l 12 Feb 2025 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluorooctanoic acid 8890 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Nov 2023 – Feb 2025 | below 0.0005 µg/l 12 Feb 2025 |
| Perfluoropentanoic acid 8887 | River water | 2 | Nov 2023 – Feb 2025 | below 0.001 µg/l 12 Feb 2025 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Nov 2023 – Feb 2025 | below 0.006 µg/l 12 Feb 2025 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Nov 2023 – Feb 2025 | below 0.005 µg/l 12 Feb 2025 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Nov 2023 – Feb 2025 | below 0.004 µg/l 12 Feb 2025 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Nov 2023 – Feb 2025 | below 0.002 µg/l 12 Feb 2025 |
| Phosphorus, Total as P 0348 | River water | 11 | Jan 2025 – Apr 2026 | 0.038 mg/l 27 Apr 2026 |
| Silica, reactive as SiO2 0182 | River water | 11 | Jan 2025 – Apr 2026 | 26 mg/l 27 Apr 2026 |
| Solids, Suspended at 105 C 0135 | River water | 5 | Dec 2025 – Apr 2026 | 3.4 mg/l 27 Apr 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.