Sharnbrook (Yelnoe Brook) downstream of Colworth House
EA name: SHARNBROOK(YELNOE BK) D/S COLWORTH HOUSE
Environment Agency sampling point AN-11M19 · 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 Aug 2026, 11:0857 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 35 since 5 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 499100, 259900As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Sharnbrook
- River, by the map
- Sharn BrookPlaced on the river its name gives, 51 m from the line.
- Next gauge downstream
- Sharnbrook On the River Great Ouse · 2.6 km along the river
- Why it was sampled
- Monitoring (national agency policy) (29 samples)
Environmental monitoring statutory (EU directives) (6 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
80.1%
Sampled 21 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 May 2026, 11:51 | 80.1 | 80.1% |
| 29 Apr 2026, 10:03 | 90.5 | 90.5% |
| 11 Mar 2026, 16:12 | 95.7 | 95.7% |
| 12 Feb 2026, 12:29 | 96.3 | 96.3% |
| 16 Jan 2026, 12:37 | 98.1 | 98.1% |
| 2 Dec 2025, 15:59 | 94.5 | 94.5% |
| 11 Nov 2025, 11:05 | 60.4 | 60.4% |
| 7 Oct 2025, 13:13 | 74.6 | 74.6% |
| 8 Sep 2025, 10:48 | 71.8 | 71.8% |
| 15 Aug 2025, 10:20 | 83 | 83% |
| 11 Jul 2025, 11:06 | 84 | 84% |
| 9 Jun 2025, 10:37 | 84 | 84% |
| 7 May 2025, 15:53 | 92.1 | 92.1% |
| 7 Apr 2025, 10:18 | 96.3 | 96.3% |
| 11 Mar 2025, 09:51 | 96.2 | 96.2% |
| 4 Feb 2025, 10:22 | 97.5 | 97.5% |
| 21 Jan 2025, 09:56 | 96 | 96% |
| 4 Dec 2024, 10:30 | 94 | 94% |
| 18 Nov 2024, 11:25 | 83.2 | 83.2% |
| 14 Oct 2024, 10:41 | 92.4 | 92.4% |
| 16 Sep 2024, 10:59 | 87.5 | 87.5% |
| 19 Aug 2024, 09:14 | 85.3 | 85.3% |
| 15 Jul 2024, 12:50 | 88.1 | 88.1% |
| 20 Jun 2024, 11:06 | 91.6 | 91.6% |
| 2 May 2024, 13:45 | 94.9 | 94.9% |
| 18 Apr 2024, 10:11 | 94.4 | 94.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.59 mg/l
Sampled 21 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 May 2026, 11:51 | 8.59 | 8.59 mg/l |
| 29 Apr 2026, 10:03 | 10.3 | 10.3 mg/l |
| 11 Mar 2026, 16:12 | 10.8 | 10.8 mg/l |
| 12 Feb 2026, 12:29 | 11.4 | 11.4 mg/l |
| 16 Jan 2026, 12:37 | 12.2 | 12.2 mg/l |
| 2 Dec 2025, 15:59 | 10.9 | 10.9 mg/l |
| 11 Nov 2025, 11:05 | 6.78 | 6.78 mg/l |
| 7 Oct 2025, 13:13 | 7.94 | 7.94 mg/l |
| 8 Sep 2025, 10:48 | 7.24 | 7.24 mg/l |
| 15 Aug 2025, 10:20 | 7.99 | 7.99 mg/l |
| 11 Jul 2025, 11:06 | 8.17 | 8.17 mg/l |
| 9 Jun 2025, 10:37 | 8.86 | 8.86 mg/l |
| 7 May 2025, 15:53 | 10.2 | 10.2 mg/l |
| 7 Apr 2025, 10:18 | 11.5 | 11.5 mg/l |
| 11 Mar 2025, 09:51 | 11.6 | 11.6 mg/l |
| 4 Feb 2025, 10:22 | 12.1 | 12.1 mg/l |
| 21 Jan 2025, 09:56 | 12 | 12 mg/l |
| 4 Dec 2024, 10:30 | 11.6 | 11.6 mg/l |
| 18 Nov 2024, 11:25 | 9.76 | 9.76 mg/l |
| 14 Oct 2024, 10:41 | 10.4 | 10.4 mg/l |
| 16 Sep 2024, 10:59 | 9.4 | 9.4 mg/l |
| 19 Aug 2024, 09:14 | 9.02 | 9.02 mg/l |
| 15 Jul 2024, 12:50 | 9.13 | 9.13 mg/l |
| 20 Jun 2024, 11:06 | 9.71 | 9.71 mg/l |
| 2 May 2024, 13:45 | 10.1 | 10.1 mg/l |
| 18 Apr 2024, 10:11 | 10.9 | 10.9 mg/l |
Water temperature
code 0076 · °C
12.1 °C
Sampled 21 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 May 2026, 11:51 | 12.1 | 12.1 °C |
| 29 Apr 2026, 10:03 | 9.5 | 9.5 °C |
| 11 Mar 2026, 16:12 | 9.9 | 9.9 °C |
| 12 Feb 2026, 12:29 | 7.8 | 7.8 °C |
| 16 Jan 2026, 12:37 | 5.9 | 5.9 °C |
| 2 Dec 2025, 15:59 | 9 | 9 °C |
| 11 Nov 2025, 11:05 | 10.1 | 10.1 °C |
| 7 Oct 2025, 13:13 | 12.4 | 12.4 °C |
| 8 Sep 2025, 10:48 | 14.8 | 14.8 °C |
| 15 Aug 2025, 10:20 | 17 | 17 °C |
| 11 Jul 2025, 11:06 | 16.5 | 16.5 °C |
| 9 Jun 2025, 10:37 | 12.8 | 12.8 °C |
| 7 May 2025, 15:53 | 10.7 | 10.7 °C |
| 7 Apr 2025, 10:18 | 7.7 | 7.7 °C |
| 11 Mar 2025, 09:51 | 7.2 | 7.2 °C |
| 4 Feb 2025, 10:22 | 6 | 6 °C |
| 21 Jan 2025, 09:56 | 5.8 | 5.8 °C |
| 4 Dec 2024, 10:30 | 6.3 | 6.3 °C |
| 18 Nov 2024, 11:25 | 8.3 | 8.3 °C |
| 14 Oct 2024, 10:41 | 10 | 10 °C |
| 16 Sep 2024, 10:59 | 12 | 12 °C |
| 19 Aug 2024, 09:14 | 12.7 | 12.7 °C |
| 15 Jul 2024, 12:50 | 13.6 | 13.6 °C |
| 20 Jun 2024, 11:06 | 12.6 | 12.6 °C |
| 2 May 2024, 13:45 | 12.5 | 12.5 °C |
| 18 Apr 2024, 10:11 | 9 | 9 °C |
pH
code 0061
8.09
Sampled 5 Aug 2026, 57 days ago · 35 results banked
Every result (35)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 Aug 2026, 11:08 | 8.09 | 8.09 |
| 7 Jul 2026, 09:54 | 8.01 | 8.01 |
| 1 Jun 2026, 09:32 | 7.87 | 7.87 |
| 21 May 2026, 11:51 | 7.87 | 7.87 |
| 29 Apr 2026, 10:03 | 7.92 | 7.92 |
| 11 Mar 2026, 16:12 | 8.18 | 8.18 |
| 12 Feb 2026, 12:29 | 8.08 | 8.08 |
| 16 Jan 2026, 12:37 | 8 | 8 |
| 2 Dec 2025, 15:59 | 8.06 | 8.06 |
| 11 Nov 2025, 11:05 | 7.68 | 7.68 |
| 7 Oct 2025, 13:13 | 8.18 | 8.18 |
| 8 Sep 2025, 10:48 | 7.91 | 7.91 |
| 15 Aug 2025, 10:20 | 8.02 | 8.02 |
| 11 Jul 2025, 11:06 | 7.93 | 7.93 |
| 9 Jun 2025, 10:37 | 7.91 | 7.91 |
| 7 May 2025, 15:53 | 7.91 | 7.91 |
| 7 Apr 2025, 10:18 | 7.97 | 7.97 |
| 11 Mar 2025, 09:51 | 8.2 | 8.2 |
| 4 Feb 2025, 10:22 | 8.1 | 8.1 |
| 21 Jan 2025, 09:56 | 8.13 | 8.13 |
| 4 Dec 2024, 10:30 | 8.12 | 8.12 |
| 18 Nov 2024, 11:25 | 7.87 | 7.87 |
| 14 Oct 2024, 10:41 | 7.98 | 7.98 |
| 16 Sep 2024, 10:59 | 8.2 | 8.2 |
| 19 Aug 2024, 09:14 | 8.18 | 8.18 |
| 15 Jul 2024, 12:50 | 7.94 | 7.94 |
| 20 Jun 2024, 11:06 | 7.98 | 7.98 |
| 2 May 2024, 13:45 | 8.14 | 8.14 |
| 18 Apr 2024, 10:11 | 8.08 | 8.08 |
| 5 Mar 2024, 12:18 | 8.12 | 8.12 |
| 8 Feb 2024, 15:13 | 8.08 | 8.08 |
| 4 Jan 2024, 10:16 | 7.94 | 7.94 |
| 5 Dec 2023, 11:29 | 7.99 | 7.99 |
| 1 Nov 2023, 11:59 | 7.94 | 7.94 |
| 5 Oct 2023, 11:38 | 8.06 | 8.06 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.031 mg/l
Sampled 21 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 May 2026, 11:51 | 0.031 | 0.031 mg/l |
| 29 Apr 2026, 10:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Mar 2026, 16:12 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Feb 2026, 12:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jan 2026, 12:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Dec 2025, 15:59 | 0.049 | 0.049 mg/l |
| 11 Nov 2025, 11:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Oct 2025, 13:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Sep 2025, 10:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Aug 2025, 10:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Jul 2025, 11:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jun 2025, 10:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 May 2025, 15:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Apr 2025, 10:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Mar 2025, 09:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2025, 10:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Jan 2025, 09:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Dec 2024, 10:30 | 0.034 | 0.034 mg/l |
| 18 Nov 2024, 11:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Oct 2024, 10:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Sep 2024, 10:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Aug 2024, 09:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jul 2024, 12:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jun 2024, 11:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 May 2024, 13:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Apr 2024, 10:11 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
6.18 mg/l
Sampled 21 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 May 2026, 11:51 | 6.18 | 6.18 mg/l |
| 29 Apr 2026, 10:03 | 7.79 | 7.79 mg/l |
| 11 Mar 2026, 16:12 | 9.58 | 9.58 mg/l |
| 12 Feb 2026, 12:29 | 9.99 | 9.99 mg/l |
| 16 Jan 2026, 12:37 | 13 | 13 mg/l |
| 2 Dec 2025, 15:59 | 18 | 18 mg/l |
| 11 Nov 2025, 11:05 | 1.1 | 1.1 mg/l |
| 7 Oct 2025, 13:13 | 2.69 | 2.69 mg/l |
| 8 Sep 2025, 10:48 | 3.79 | 3.79 mg/l |
| 15 Aug 2025, 10:20 | 4.99 | 4.99 mg/l |
| 11 Jul 2025, 11:06 | 4.19 | 4.19 mg/l |
| 9 Jun 2025, 10:37 | 5.78 | 5.78 mg/l |
| 7 May 2025, 15:53 | 7.29 | 7.29 mg/l |
| 7 Apr 2025, 10:18 | 9.59 | 9.59 mg/l |
| 11 Mar 2025, 09:51 | 8.99 | 8.99 mg/l |
| 4 Feb 2025, 10:22 | 7.99 | 7.99 mg/l |
| 21 Jan 2025, 09:56 | 8.89 | 8.89 mg/l |
| 4 Dec 2024, 10:30 | 7.38 | 7.38 mg/l |
| 18 Nov 2024, 11:25 | 8.29 | 8.29 mg/l |
| 14 Oct 2024, 10:41 | 7.27 | 7.27 mg/l |
| 16 Sep 2024, 10:59 | 5.89 | 5.89 mg/l |
| 19 Aug 2024, 09:14 | 5.79 | 5.79 mg/l |
| 15 Jul 2024, 12:50 | 6.09 | 6.09 mg/l |
| 20 Jun 2024, 11:06 | 7.69 | 7.69 mg/l |
| 2 May 2024, 13:45 | 5.78 | 5.78 mg/l |
| 18 Apr 2024, 10:11 | 6.09 | 6.09 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.23 mg/l
Sampled 21 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 May 2026, 11:51 | 0.23 | 0.23 mg/l |
| 29 Apr 2026, 10:03 | 0.24 | 0.24 mg/l |
| 11 Mar 2026, 16:12 | 0.15 | 0.15 mg/l |
| 12 Feb 2026, 12:29 | 0.08 | 0.08 mg/l |
| 16 Jan 2026, 12:37 | 0.11 | 0.11 mg/l |
| 2 Dec 2025, 15:59 | 0.16 | 0.16 mg/l |
| 11 Nov 2025, 11:05 | 1.7 | 1.7 mg/l |
| 7 Oct 2025, 13:13 | 1.6 | 1.6 mg/l |
| 8 Sep 2025, 10:48 | 1.7 | 1.7 mg/l |
| 15 Aug 2025, 10:20 | 1.2 | 1.2 mg/l |
| 11 Jul 2025, 11:06 | 1.7 | 1.7 mg/l |
| 9 Jun 2025, 10:37 | 0.93 | 0.93 mg/l |
| 7 May 2025, 15:53 | 0.41 | 0.41 mg/l |
| 7 Apr 2025, 10:18 | 0.39 | 0.39 mg/l |
| 11 Mar 2025, 09:51 | 0.18 | 0.18 mg/l |
| 4 Feb 2025, 10:22 | 0.19 | 0.19 mg/l |
| 21 Jan 2025, 09:56 | 0.14 | 0.14 mg/l |
| 4 Dec 2024, 10:30 | 0.089 | 0.089 mg/l |
| 18 Nov 2024, 11:25 | 0.17 | 0.17 mg/l |
| 14 Oct 2024, 10:41 | 0.099 | 0.099 mg/l |
| 16 Sep 2024, 10:59 | 1.2 | 1.2 mg/l |
| 19 Aug 2024, 09:14 | 0.81 | 0.81 mg/l |
| 15 Jul 2024, 12:50 | 0.43 | 0.43 mg/l |
| 20 Jun 2024, 11:06 | 0.28 | 0.28 mg/l |
| 2 May 2024, 13:45 | 0.14 | 0.14 mg/l |
| 18 Apr 2024, 10:11 | 0.15 | 0.15 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1144 µS/cm
Sampled 21 May 2026, 4 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 21 May 2026, 11:51 | 1144 | 1144 µS/cm |
| 29 Apr 2026, 10:03 | 1100 | 1100 µS/cm |
| 11 Mar 2026, 16:12 | 881 | 881 µS/cm |
| 12 Feb 2026, 12:29 | 673 | 673 µS/cm |
| 16 Jan 2026, 12:37 | 541 | 541 µS/cm |
| 2 Dec 2025, 15:59 | 742 | 742 µS/cm |
| 11 Nov 2025, 11:05 | 1273 | 1273 µS/cm |
| 7 Oct 2025, 13:13 | 1236 | 1236 µS/cm |
| 8 Sep 2025, 10:48 | 1235 | 1235 µS/cm |
| 15 Aug 2025, 10:20 | 1163 | 1163 µS/cm |
| 11 Jul 2025, 11:06 | 1209 | 1209 µS/cm |
| 9 Jun 2025, 10:37 | 1107 | 1107 µS/cm |
| 7 May 2025, 15:53 | 1023 | 1023 µS/cm |
| 7 Apr 2025, 10:18 | 1005 | 1005 µS/cm |
| 11 Mar 2025, 09:51 | 899 | 899 µS/cm |
| 4 Feb 2025, 10:22 | 810 | 810 µS/cm |
| 21 Jan 2025, 09:56 | 858 | 858 µS/cm |
| 4 Dec 2024, 10:30 | 802 | 802 µS/cm |
| 18 Nov 2024, 11:25 | 1024 | 1024 µS/cm |
| 14 Oct 2024, 10:41 | 775 | 775 µS/cm |
| 16 Sep 2024, 10:59 | 1130 | 1130 µS/cm |
| 19 Aug 2024, 09:14 | 1139 | 1139 µS/cm |
| 15 Jul 2024, 12:50 | 920 | 920 µS/cm |
| 20 Jun 2024, 11:06 | 1050 | 1050 µS/cm |
| 2 May 2024, 13:45 | 847 | 847 µS/cm |
| 18 Apr 2024, 10:11 | 770 | 770 µS/cm |
Everything measured here
100 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 100 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 26 | Apr 2024 – May 2026 | 80.1% 21 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 26 | Apr 2024 – May 2026 | 8.59 mg/l 21 May 2026 |
| Temperature of Water 0076 | River water | 26 | Apr 2024 – May 2026 | 12.1 °C 21 May 2026 |
| pH 0061 | River water | 35 | Oct 2023 – Aug 2026 | 8.09 5 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 26 | Apr 2024 – May 2026 | 0.031 mg/l 21 May 2026 |
| Nitrate as N 0117 | River water | 26 | Apr 2024 – May 2026 | 6.18 mg/l 21 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 26 | Apr 2024 – May 2026 | 0.23 mg/l 21 May 2026 |
| Conductivity at 25 C 0077 | River water | 26 | Apr 2024 – May 2026 | 1144 µS/cm 21 May 2026 |
| (Perfluorohexanesulfonyl)[3-(trimethylazaniumyl)propyl]azanide 2890 | River water | 1 | Jan 2026 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| 10:2 Fluorotelomer sulfonic acid 2994 | River water | 1 | Jan 2026 – Jan 2026 | below 0.002 µg/l 16 Jan 2026 |
| 11-chloroeicosafluoro-3-oxaundecane-1-sulfonic acid (F-53B Minor) 2993 | River water | 2 | Jul 2025 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (B) 2942 | River water | 2 | Jul 2025 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| 2-(N-Ethylperfluorooctanesulfonamido)acetic acid (L) 2991 | River water | 2 | Jul 2025 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (B) 2943 | River water | 2 | Jul 2025 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| 2-(N-Methylperfluorooctanesulfonamido)acetic acid (L) 2990 | River water | 2 | Jul 2025 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| 2H,2H,3H,3H-Perfluorooctanoic acid 2989 | River water | 2 | Jul 2025 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| 2H-Perfluoro-2-decenoic acid 2888 | River water | 1 | Jan 2026 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| 3-Perfluoroheptylpropanoic acid 2925 | River water | 2 | Jul 2025 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| 3:3 Fluorotelomer carboxylic acid 2926 | River water | 2 | Jul 2025 – Jan 2026 | below 0.004 µg/l 16 Jan 2026 |
| 4,8-Dioxa-3H-perfluorononanoic acid (ADONA) 2988 | River water | 2 | Jul 2025 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| 4:2 Fluorotelomer sulfonic acid 2987 | River water | 2 | Jul 2025 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| 5:1:2 Fluorotelomer betaine 2887 | River water | 1 | Jan 2026 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| 5:3 Fluorotelomer betaine 2886 | River water | 1 | Jan 2026 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| 6:2 Fluorotelomer phosphate diester 2986 | River water | 1 | Jan 2026 – Jan 2026 | below 0.004 µg/l 16 Jan 2026 |
| 6:2 Fluorotelomer sulfonamide amine oxide (6:2 FTNO) (Capstone A) 2841 | River water | 1 | Jan 2026 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| 6:2 Fluorotelomer sulfonamide betaine 2985 | River water | 1 | Jan 2026 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| 6:2 Fluorotelomer sulfonic acid 2984 | River water | 2 | Jul 2025 – Jan 2026 | 0.0011 µg/l 16 Jan 2026 |
| 6:2/8:2 Fluorotelomer phosphate diester 2884 | River water | 1 | Jan 2026 – Jan 2026 | below 0.01 µg/l 16 Jan 2026 |
| 6:6 Perfluorophosphinic acid 2883 | River water | 1 | Jan 2026 – Jan 2026 | below 0.004 µg/l 16 Jan 2026 |
| 6:8 Perfluorophosphinic acid 2882 | River water | 1 | Jan 2026 – Jan 2026 | below 0.01 µg/l 16 Jan 2026 |
| 8:2 Fluorotelomer phosphate diester 2880 | River water | 1 | Jan 2026 – Jan 2026 | below 0.004 µg/l 16 Jan 2026 |
| 8:2 Fluorotelomer sulfonic acid 2983 | River water | 2 | Jul 2025 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| 8:8 Perfluorophosphinic acid 2879 | River water | 1 | Jan 2026 – Jan 2026 | below 0.01 µg/l 16 Jan 2026 |
| 9-chlorohexadecafluoro-3-oxanonane-1-sulfonic acid 2982 | River water | 2 | Jul 2025 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Jun 2024 – May 2026 | 290 mg/l 21 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Jun 2024 – May 2026 | 0.00049 mg/l 21 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 26 | Apr 2024 – May 2026 | 1.3 mg/l 21 May 2026 |
| Cadmium, Dissolved 0106 | River water | 34 | Oct 2023 – Aug 2026 | below 0.01 µg/l 5 Aug 2026 |
| Calcium 0241 | River water | 12 | Oct 2023 – Jul 2026 | 140 mg/l 7 Jul 2026 |
| Calcium, Dissolved 0239 | River water | 34 | Oct 2023 – Aug 2026 | 140 mg/l 5 Aug 2026 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 34 | Oct 2023 – Aug 2026 | 5.8 mg/l 5 Aug 2026 |
| Chemical Oxygen Demand :- {COD} 0092 | River water | 24 | Apr 2024 – Mar 2026 | 18 mg/l 11 Mar 2026 |
| Chloride 0172 | River water | 24 | Apr 2024 – Mar 2026 | 48 mg/l 11 Mar 2026 |
| Chlorophyll : Acetone Extract 7887 | River water | 21 | Apr 2024 – Mar 2026 | 1.6 µg/l 11 Mar 2026 |
| Chromium Hexavalent, Dissolved :- {Cr VI} 6619 | River water | 9 | Jan 2024 – Jul 2026 | 0.083 µg/l 7 Jul 2026 |
| Chromium, Dissolved 3409 | River water | 12 | Oct 2023 – Jul 2026 | below 0.5 µg/l 7 Jul 2026 |
| Copper : BLM Bioavailable 4821 | River water | 11 | Oct 2023 – Jul 2026 | 0.04 µg/l 7 Jul 2026 |
| Copper, Dissolved 6450 | River water | 12 | Oct 2023 – Jul 2026 | 0.66 µg/l 7 Jul 2026 |
| Cyanide : Free as CN 0174 | River water | 11 | Oct 2023 – Jul 2026 | below 0.005 mg/l 7 Jul 2026 |
| Cyanide as CN 0175 | River water | 11 | Oct 2023 – Jul 2026 | below 0.005 mg/l 7 Jul 2026 |
| Hardness, Total as CaCO3 0158 | River water | 12 | Oct 2023 – Jul 2026 | 388 mg/l 7 Jul 2026 |
| Hexafluoropropylene oxide dimer acid (Gen X) 2981 | River water | 2 | Jul 2025 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| Hexafluoropropylene oxide trimer acid 2980 | River water | 1 | Jan 2026 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| Lead : BLM Bioavailable 3377 | River water | 33 | Oct 2023 – Aug 2026 | 0.01 µg/l 5 Aug 2026 |
| Lead, Dissolved 0052 | River water | 34 | Oct 2023 – Aug 2026 | below 0.1 µg/l 5 Aug 2026 |
| Magnesium 0237 | River water | 12 | Oct 2023 – Jul 2026 | 9.4 mg/l 7 Jul 2026 |
| Magnesium, Dissolved 0235 | River water | 34 | Oct 2023 – Aug 2026 | 9.7 mg/l 5 Aug 2026 |
| N-Ethylperfluorooctanesulfonamide 2977 | River water | 2 | Jul 2025 – Jan 2026 | below 0.002 µg/l 16 Jan 2026 |
| N-methylperfluorooctanesulfonamide 2975 | River water | 2 | Jul 2025 – Jan 2026 | below 0.002 µg/l 16 Jan 2026 |
| Nickel : BLM Bioavailable 3878 | River water | 33 | Oct 2023 – Aug 2026 | 0.72 µg/l 5 Aug 2026 |
| Nickel, Dissolved 3410 | River water | 34 | Oct 2023 – Aug 2026 | 1.9 µg/l 5 Aug 2026 |
| Nitrite as N 0118 | River water | 26 | Apr 2024 – May 2026 | 0.021 mg/l 21 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 26 | Apr 2024 – May 2026 | 6.2 mg/l 21 May 2026 |
| Perfluoro(2-ethoxyethane)sulfonic acid 2924 | River water | 2 | Jul 2025 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| Perfluoro(4-methoxybutanoic) acid 2923 | River water | 2 | Jul 2025 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| Perfluoro-3,6-dioxaheptanoic acid 2922 | River water | 2 | Jul 2025 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| Perfluoro-3-methoxypropanoic acid 2921 | River water | 2 | Jul 2025 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| Perfluoro-4-ethylcyclohexanesulfonic acid 2973 | River water | 2 | Jul 2025 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| Perfluorobutanesulfonic acid 2972 | River water | 2 | Jul 2025 – Jan 2026 | 0.002 µg/l 16 Jan 2026 |
| Perfluorobutanoic acid 2995 | River water | 2 | Jul 2025 – Jan 2026 | 0.0014 µg/l 16 Jan 2026 |
| Perfluorobutylsulfonamide (perfluorobutane sulfonamide) 2970 | River water | 2 | Jul 2025 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| Perfluorodecanesulfonic acid 2969 | River water | 2 | Jul 2025 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| Perfluorodecanoic acid 8892 | River water | 2 | Jul 2025 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| Perfluorododecane sulfonic acid 2968 | River water | 2 | Jul 2025 – Jan 2026 | below 0.005 µg/l 16 Jan 2026 |
| Perfluorododecanoic acid 8894 | River water | 2 | Jul 2025 – Jan 2026 | below 0.002 µg/l 16 Jan 2026 |
| Perfluoroheptanesulfonic acid 2967 | River water | 2 | Jul 2025 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| Perfluoroheptanoic acid 8889 | River water | 2 | Jul 2025 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| Perfluorohexane sulfonamido amine 2874 | River water | 1 | Jan 2026 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| Perfluorohexanesulfonamide 2965 | River water | 2 | Jul 2025 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| Perfluorohexanesulfonic acid (B) 2944 | River water | 2 | Jul 2025 – Jan 2026 | 0.00053 µg/l 16 Jan 2026 |
| Perfluorohexanesulfonic acid (L) 2964 | River water | 2 | Jul 2025 – Jan 2026 | 0.0023 µg/l 16 Jan 2026 |
| Perfluorohexanoic acid 8888 | River water | 2 | Jul 2025 – Jan 2026 | 0.0012 µg/l 16 Jan 2026 |
| Perfluorononanesulfonic acid 2963 | River water | 2 | Jul 2025 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| Perfluorononanoic acid 8891 | River water | 2 | Jul 2025 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| Perfluorooctadecanoic acid 2962 | River water | 2 | Jul 2025 – Jan 2026 | below 0.002 µg/l 16 Jan 2026 |
| Perfluorooctanesulfonamide 2961 | River water | 2 | Jul 2025 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| Perfluorooctanesulfonic acid (branched) 2960 | River water | 2 | Jul 2025 – Jan 2026 | 0.0055 µg/l 16 Jan 2026 |
| Perfluorooctanesulfonic acid (linear) 2959 | River water | 2 | Jul 2025 – Jan 2026 | 0.004 µg/l 16 Jan 2026 |
| Perfluorooctanesulfonic acid (total) 2958 | River water | 1 | Jan 2026 – Jan 2026 | 0.0095 µg/l 16 Jan 2026 |
| Perfluorooctanoic acid 8890 | River water | 2 | Jul 2025 – Jan 2026 | 0.0021 µg/l 16 Jan 2026 |
| Perfluoropentanesulfonic acid 2957 | River water | 2 | Jul 2025 – Jan 2026 | below 0.0005 µg/l 16 Jan 2026 |
| Perfluoropentanoic acid 8887 | River water | 2 | Jul 2025 – Jan 2026 | 0.001 µg/l 16 Jan 2026 |
| Perfluorotetradecanoic acid 8895 | River water | 2 | Jul 2025 – Jan 2026 | below 0.006 µg/l 16 Jan 2026 |
| Perfluorotridecanoic acid 2955 | River water | 2 | Jul 2025 – Jan 2026 | below 0.002 µg/l 16 Jan 2026 |
| Perfluoroundecane sulfonic acid 2953 | River water | 2 | Jul 2025 – Jan 2026 | below 0.004 µg/l 16 Jan 2026 |
| Perfluoroundecanoic acid 8893 | River water | 2 | Jul 2025 – Jan 2026 | below 0.001 µg/l 16 Jan 2026 |
| Silica, reactive as SiO2 0182 | River water | 24 | Apr 2024 – Mar 2026 | 6.8 mg/l 11 Mar 2026 |
| Solids, Suspended at 105 C 0135 | River water | 24 | Apr 2024 – Mar 2026 | 15 mg/l 11 Mar 2026 |
| Zinc 6455 | River water | 12 | Oct 2023 – Jul 2026 | below 5 µg/l 7 Jul 2026 |
| Zinc, Dissolved 3408 | River water | 12 | Oct 2023 – Jul 2026 | 1.6 µg/l 7 Jul 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.