Claydon Brook tributary of Ouse Granborough Road Bridge
EA name: CLAYDON BK.TRIB.OUSE GRANBOROUGH RD.BR.
Environment Agency sampling point AN-02M18 · 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
- 6 Mar 2026, 14:417 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
- 29 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 476400, 226400As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- Not placedGrid reference only to 100 m and no line carries the name it gives, so position alone cannot choose. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (22 samples)
Planned investigation (local monitoring) (7 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
102.8%
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 14:41 | 102.8 | 102.8% |
| 16 Feb 2026, 10:54 | 94.8 | 94.8% |
| 16 Jan 2026, 14:33 | 94.1 | 94.1% |
| 1 Dec 2025, 13:14 | 85 | 85% |
| 4 Nov 2025, 13:18 | 35.6 | 35.6% |
| 6 Oct 2025, 12:54 | 50.2 | 50.2% |
| 4 Sep 2025, 11:54 | 61.6 | 61.6% |
| 8 Aug 2025, 14:05 | 49.2 | 49.2% |
| 7 Jul 2025, 11:25 | 73.4 | 73.4% |
| 9 Jun 2025, 11:24 | 88.6 | 88.6% |
| 22 May 2025, 14:29 | 114.1 | 114.1% |
| 11 Apr 2025, 15:30 | 126.1 | 126.1% |
| 7 Mar 2025, 13:43 | 104.2 | 104.2% |
| 10 Feb 2025, 13:47 | 97.4 | 97.4% |
| 9 Jan 2025, 10:45 | 95.1 | 95.1% |
| 5 Dec 2024, 12:42 | 90.6 | 90.6% |
| 7 Nov 2024, 10:56 | 77.2 | 77.2% |
| 17 Oct 2024, 11:36 | 83.2 | 83.2% |
| 25 Sep 2024, 12:04 | 78.6 | 78.6% |
| 1 Aug 2024, 10:57 | 57.2 | 57.2% |
| 1 Jul 2024, 12:21 | 82.3 | 82.3% |
| 3 Jun 2024, 12:47 | 95.2 | 95.2% |
| 8 Mar 2024, 13:55 | 99.4 | 99.4% |
| 5 Feb 2024, 12:34 | 89.8 | 89.8% |
| 9 Jan 2024, 15:02 | 94.8 | 94.8% |
| 12 Dec 2023, 11:23 | 89.6 | 89.6% |
| 29 Nov 2023, 12:56 | 91.7 | 91.7% |
| 13 Nov 2023, 13:15 | 85.2 | 85.2% |
| 5 Oct 2023, 11:50 | 38.2 | 38.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
12 mg/l
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 14:41 | 12 | 12 mg/l |
| 16 Feb 2026, 10:54 | 11.9 | 11.9 mg/l |
| 16 Jan 2026, 14:33 | 11.7 | 11.7 mg/l |
| 1 Dec 2025, 13:14 | 9.9 | 9.9 mg/l |
| 4 Nov 2025, 13:18 | 3.78 | 3.78 mg/l |
| 6 Oct 2025, 12:54 | 5.24 | 5.24 mg/l |
| 4 Sep 2025, 11:54 | 6.08 | 6.08 mg/l |
| 8 Aug 2025, 14:05 | 4.62 | 4.62 mg/l |
| 7 Jul 2025, 11:25 | 6.93 | 6.93 mg/l |
| 9 Jun 2025, 11:24 | 8.82 | 8.82 mg/l |
| 22 May 2025, 14:29 | 11.2 | 11.2 mg/l |
| 11 Apr 2025, 15:30 | 13.6 | 13.6 mg/l |
| 7 Mar 2025, 13:43 | 11.9 | 11.9 mg/l |
| 10 Feb 2025, 13:47 | 12.5 | 12.5 mg/l |
| 9 Jan 2025, 10:45 | 12.9 | 12.9 mg/l |
| 5 Dec 2024, 12:42 | 10.3 | 10.3 mg/l |
| 7 Nov 2024, 10:56 | 8.54 | 8.54 mg/l |
| 17 Oct 2024, 11:36 | 8.59 | 8.59 mg/l |
| 25 Sep 2024, 12:04 | 8.17 | 8.17 mg/l |
| 1 Aug 2024, 10:57 | 5.15 | 5.15 mg/l |
| 1 Jul 2024, 12:21 | 7.93 | 7.93 mg/l |
| 3 Jun 2024, 12:47 | 9.43 | 9.43 mg/l |
| 8 Mar 2024, 13:55 | 11.7 | 11.7 mg/l |
| 5 Feb 2024, 12:34 | 10.5 | 10.5 mg/l |
| 9 Jan 2024, 15:02 | 12.5 | 12.5 mg/l |
| 12 Dec 2023, 11:23 | 10.7 | 10.7 mg/l |
| 29 Nov 2023, 12:56 | 11.6 | 11.6 mg/l |
| 13 Nov 2023, 13:15 | 9.51 | 9.51 mg/l |
| 5 Oct 2023, 11:50 | 3.89 | 3.89 mg/l |
Water temperature
code 0076 · °C
8.5 °C
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 14:41 | 8.5 | 8.5 °C |
| 16 Feb 2026, 10:54 | 5.5 | 5.5 °C |
| 16 Jan 2026, 14:33 | 6 | 6 °C |
| 1 Dec 2025, 13:14 | 8.6 | 8.6 °C |
| 4 Nov 2025, 13:18 | 12.5 | 12.5 °C |
| 6 Oct 2025, 12:54 | 13.3 | 13.3 °C |
| 4 Sep 2025, 11:54 | 15.9 | 15.9 °C |
| 8 Aug 2025, 14:05 | 18.3 | 18.3 °C |
| 7 Jul 2025, 11:25 | 18 | 18 °C |
| 9 Jun 2025, 11:24 | 15.5 | 15.5 °C |
| 22 May 2025, 14:29 | 16.1 | 16.1 °C |
| 11 Apr 2025, 15:30 | 11.9 | 11.9 °C |
| 7 Mar 2025, 13:43 | 9.6 | 9.6 °C |
| 10 Feb 2025, 13:47 | 4.7 | 4.7 °C |
| 9 Jan 2025, 10:45 | 2.7 | 2.7 °C |
| 5 Dec 2024, 12:42 | 9.8 | 9.8 °C |
| 7 Nov 2024, 10:56 | 10.8 | 10.8 °C |
| 17 Oct 2024, 11:36 | 13.8 | 13.8 °C |
| 25 Sep 2024, 12:04 | 13.5 | 13.5 °C |
| 1 Aug 2024, 10:57 | 20.4 | 20.4 °C |
| 1 Jul 2024, 12:21 | 17 | 17 °C |
| 3 Jun 2024, 12:47 | 15.7 | 15.7 °C |
| 8 Mar 2024, 13:55 | 8.1 | 8.1 °C |
| 5 Feb 2024, 12:34 | 8.5 | 8.5 °C |
| 9 Jan 2024, 15:02 | 3.8 | 3.8 °C |
| 12 Dec 2023, 11:23 | 7.5 | 7.5 °C |
| 29 Nov 2023, 12:56 | 5.4 | 5.4 °C |
| 13 Nov 2023, 13:15 | 10.4 | 10.4 °C |
| 5 Oct 2023, 11:50 | 14.4 | 14.4 °C |
pH
code 0061
8.15
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 14:41 | 8.15 | 8.15 |
| 16 Feb 2026, 10:54 | 7.82 | 7.82 |
| 16 Jan 2026, 14:33 | 8.24 | 8.24 |
| 1 Dec 2025, 13:14 | 7.94 | 7.94 |
| 4 Nov 2025, 13:18 | 7.46 | 7.46 |
| 6 Oct 2025, 12:54 | 7.47 | 7.47 |
| 4 Sep 2025, 11:54 | 7.49 | 7.49 |
| 8 Aug 2025, 14:05 | 7.44 | 7.44 |
| 7 Jul 2025, 11:25 | 7.55 | 7.55 |
| 9 Jun 2025, 11:24 | 7.88 | 7.88 |
| 22 May 2025, 14:29 | 8.36 | 8.36 |
| 11 Apr 2025, 15:30 | 8.48 | 8.48 |
| 7 Mar 2025, 13:43 | 8.33 | 8.33 |
| 10 Feb 2025, 13:47 | 8.04 | 8.04 |
| 9 Jan 2025, 10:45 | 8.14 | 8.14 |
| 5 Dec 2024, 12:42 | 7.78 | 7.78 |
| 7 Nov 2024, 10:56 | 7.72 | 7.72 |
| 17 Oct 2024, 11:36 | 7.76 | 7.76 |
| 25 Sep 2024, 12:04 | 7.56 | 7.56 |
| 1 Aug 2024, 10:57 | 7.32 | 7.32 |
| 1 Jul 2024, 12:21 | 7.8 | 7.8 |
| 3 Jun 2024, 12:47 | 8.28 | 8.28 |
| 8 Mar 2024, 13:55 | 8.2 | 8.2 |
| 5 Feb 2024, 12:34 | 8.07 | 8.07 |
| 9 Jan 2024, 15:02 | 8.19 | 8.19 |
| 12 Dec 2023, 11:23 | 7.84 | 7.84 |
| 29 Nov 2023, 12:56 | 8.12 | 8.12 |
| 13 Nov 2023, 13:15 | 7.81 | 7.81 |
| 5 Oct 2023, 11:50 | 7.48 | 7.48 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 14:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Feb 2026, 10:54 | 0.043 | 0.043 mg/l |
| 16 Jan 2026, 14:33 | 0.038 | 0.038 mg/l |
| 1 Dec 2025, 13:14 | 0.051 | 0.051 mg/l |
| 4 Nov 2025, 13:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Oct 2025, 12:54 | 0.042 | 0.042 mg/l |
| 4 Sep 2025, 11:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Aug 2025, 14:05 | 0.046 | 0.046 mg/l |
| 7 Jul 2025, 11:25 | 0.27 | 0.27 mg/l |
| 9 Jun 2025, 11:24 | 0.12 | 0.12 mg/l |
| 22 May 2025, 14:29 | 0.063 | 0.063 mg/l |
| 11 Apr 2025, 15:30 | 0.049 | 0.049 mg/l |
| 7 Mar 2025, 13:43 | 0.17 | 0.17 mg/l |
| 10 Feb 2025, 13:47 | 0.076 | 0.076 mg/l |
| 9 Jan 2025, 10:45 | 0.042 | 0.042 mg/l |
| 5 Dec 2024, 12:42 | 0.28 | 0.28 mg/l |
| 7 Nov 2024, 10:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Oct 2024, 11:36 | 0.032 | 0.032 mg/l |
| 25 Sep 2024, 12:04 | 0.068 | 0.068 mg/l |
| 1 Aug 2024, 10:57 | 0.046 | 0.046 mg/l |
| 1 Jul 2024, 12:21 | 0.037 | 0.037 mg/l |
| 3 Jun 2024, 12:47 | 0.042 | 0.042 mg/l |
| 8 Mar 2024, 13:55 | 0.053 | 0.053 mg/l |
| 5 Feb 2024, 12:34 | 0.043 | 0.043 mg/l |
| 9 Jan 2024, 15:02 | 0.11 | 0.11 mg/l |
| 12 Dec 2023, 11:23 | 0.14 | 0.14 mg/l |
| 29 Nov 2023, 12:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Nov 2023, 13:15 | 0.046 | 0.046 mg/l |
| 5 Oct 2023, 11:50 | 0.049 | 0.049 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
8.77 mg/l
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 14:41 | 8.77 | 8.77 mg/l |
| 16 Feb 2026, 10:54 | 5.79 | 5.79 mg/l |
| 16 Jan 2026, 14:33 | 9.98 | 9.98 mg/l |
| 1 Dec 2025, 13:14 | 22.9 | 22.9 mg/l |
| 4 Nov 2025, 13:18 | 10.9 | 10.9 mg/l |
| 6 Oct 2025, 12:54 | 15.9 | 15.9 mg/l |
| 4 Sep 2025, 11:54 | 8.47 | 8.47 mg/l |
| 8 Aug 2025, 14:05 | 18.9 | 18.9 mg/l |
| 7 Jul 2025, 11:25 | 20.8 | 20.8 mg/l |
| 9 Jun 2025, 11:24 | 10.9 | 10.9 mg/l |
| 22 May 2025, 14:29 | 14.9 | 14.9 mg/l |
| 11 Apr 2025, 15:30 | 15.9 | 15.9 mg/l |
| 7 Mar 2025, 13:43 | 8.35 | 8.35 mg/l |
| 10 Feb 2025, 13:47 | 5.48 | 5.48 mg/l |
| 9 Jan 2025, 10:45 | 7.18 | 7.18 mg/l |
| 5 Dec 2024, 12:42 | 5.68 | 5.68 mg/l |
| 7 Nov 2024, 10:56 | 8.47 | 8.47 mg/l |
| 17 Oct 2024, 11:36 | 7.57 | 7.57 mg/l |
| 25 Sep 2024, 12:04 | 20 | 20 mg/l |
| 1 Aug 2024, 10:57 | 18.9 | 18.9 mg/l |
| 1 Jul 2024, 12:21 | 13.9 | 13.9 mg/l |
| 3 Jun 2024, 12:47 | 9.84 | 9.84 mg/l |
| 8 Mar 2024, 13:55 | 7.25 | 7.25 mg/l |
| 5 Feb 2024, 12:34 | 9.94 | 9.94 mg/l |
| 9 Jan 2024, 15:02 | 8.36 | 8.36 mg/l |
| 12 Dec 2023, 11:23 | 5.68 | 5.68 mg/l |
| 29 Nov 2023, 12:56 | 9.98 | 9.98 mg/l |
| 13 Nov 2023, 13:15 | 8.98 | 8.98 mg/l |
| 5 Oct 2023, 11:50 | 15.9 | 15.9 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.49 mg/l
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 14:41 | 0.49 | 0.49 mg/l |
| 16 Feb 2026, 10:54 | 0.14 | 0.14 mg/l |
| 16 Jan 2026, 14:33 | 0.14 | 0.14 mg/l |
| 1 Dec 2025, 13:14 | 0.29 | 0.29 mg/l |
| 4 Nov 2025, 13:18 | 0.53 | 0.53 mg/l |
| 6 Oct 2025, 12:54 | 1.1 | 1.1 mg/l |
| 4 Sep 2025, 11:54 | 0.96 | 0.96 mg/l |
| 8 Aug 2025, 14:05 | 1.1 | 1.1 mg/l |
| 7 Jul 2025, 11:25 | 1.2 | 1.2 mg/l |
| 9 Jun 2025, 11:24 | 0.76 | 0.76 mg/l |
| 22 May 2025, 14:29 | 0.97 | 0.97 mg/l |
| 11 Apr 2025, 15:30 | 1.1 | 1.1 mg/l |
| 7 Mar 2025, 13:43 | 0.3 | 0.3 mg/l |
| 10 Feb 2025, 13:47 | 0.12 | 0.12 mg/l |
| 9 Jan 2025, 10:45 | 0.15 | 0.15 mg/l |
| 5 Dec 2024, 12:42 | 0.16 | 0.16 mg/l |
| 7 Nov 2024, 10:56 | 0.45 | 0.45 mg/l |
| 17 Oct 2024, 11:36 | 0.17 | 0.17 mg/l |
| 25 Sep 2024, 12:04 | 0.17 | 0.17 mg/l |
| 1 Aug 2024, 10:57 | 1.6 | 1.6 mg/l |
| 1 Jul 2024, 12:21 | 1.2 | 1.2 mg/l |
| 3 Jun 2024, 12:47 | 0.6 | 0.6 mg/l |
| 8 Mar 2024, 13:55 | 0.23 | 0.23 mg/l |
| 5 Feb 2024, 12:34 | 0.35 | 0.35 mg/l |
| 9 Jan 2024, 15:02 | 0.19 | 0.19 mg/l |
| 12 Dec 2023, 11:23 | 0.14 | 0.14 mg/l |
| 29 Nov 2023, 12:56 | 0.14 | 0.14 mg/l |
| 13 Nov 2023, 13:15 | 0.2 | 0.2 mg/l |
| 5 Oct 2023, 11:50 | 0.82 | 0.82 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
729 µS/cm
Sampled 6 Mar 2026, 7 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2026, 14:41 | 729 | 729 µS/cm |
| 16 Feb 2026, 10:54 | 480 | 480 µS/cm |
| 16 Jan 2026, 14:33 | 485 | 485 µS/cm |
| 1 Dec 2025, 13:14 | 817 | 817 µS/cm |
| 4 Nov 2025, 13:18 | 856 | 856 µS/cm |
| 6 Oct 2025, 12:54 | 877 | 877 µS/cm |
| 4 Sep 2025, 11:54 | 766 | 766 µS/cm |
| 8 Aug 2025, 14:05 | 938 | 938 µS/cm |
| 7 Jul 2025, 11:25 | 934 | 934 µS/cm |
| 9 Jun 2025, 11:24 | 819 | 819 µS/cm |
| 22 May 2025, 14:29 | 849 | 849 µS/cm |
| 11 Apr 2025, 15:30 | 869 | 869 µS/cm |
| 7 Mar 2025, 13:43 | 789 | 789 µS/cm |
| 10 Feb 2025, 13:47 | 477 | 477 µS/cm |
| 9 Jan 2025, 10:45 | 614 | 614 µS/cm |
| 5 Dec 2024, 12:42 | 466 | 466 µS/cm |
| 7 Nov 2024, 10:56 | 802 | 802 µS/cm |
| 17 Oct 2024, 11:36 | 605 | 605 µS/cm |
| 25 Sep 2024, 12:04 | 669 | 669 µS/cm |
| 1 Aug 2024, 10:57 | 846 | 846 µS/cm |
| 1 Jul 2024, 12:21 | 831 | 831 µS/cm |
| 3 Jun 2024, 12:47 | 830 | 830 µS/cm |
| 8 Mar 2024, 13:55 | 752 | 752 µS/cm |
| 5 Feb 2024, 12:34 | 834 | 834 µS/cm |
| 9 Jan 2024, 15:02 | 688 | 688 µS/cm |
| 12 Dec 2023, 11:23 | 383 | 383 µS/cm |
| 29 Nov 2023, 12:56 | 713 | 713 µS/cm |
| 13 Nov 2023, 13:15 | 477 | 477 µS/cm |
| 5 Oct 2023, 11:50 | 894 | 894 µS/cm |
Everything measured here
12 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 12 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 29 | Oct 2023 – Mar 2026 | 102.8% 6 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 29 | Oct 2023 – Mar 2026 | 12 mg/l 6 Mar 2026 |
| Temperature of Water 0076 | River water | 29 | Oct 2023 – Mar 2026 | 8.5 °C 6 Mar 2026 |
| pH 0061 | River water | 29 | Oct 2023 – Mar 2026 | 8.15 6 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 29 | Oct 2023 – Mar 2026 | below 0.03 mg/l 6 Mar 2026 |
| Nitrate as N 0117 | River water | 29 | Oct 2023 – Mar 2026 | 8.77 mg/l 6 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 29 | Oct 2023 – Mar 2026 | 0.49 mg/l 6 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 29 | Oct 2023 – Mar 2026 | 729 µS/cm 6 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 29 | Oct 2023 – Mar 2026 | 210 mg/l 6 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 29 | Oct 2023 – Mar 2026 | below 0.00049 mg/l 6 Mar 2026 |
| Nitrite as N 0118 | River water | 29 | Oct 2023 – Mar 2026 | 0.035 mg/l 6 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 29 | Oct 2023 – Mar 2026 | 8.8 mg/l 6 Mar 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.