Claydon Brook tributary of Ouse. Swanbourne Road Bridge
EA name: CLAYDON BK.TRIB.OUSE.SWANBOURNE RD.BR.
Environment Agency sampling point AN-02M15 · 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
- 8 May 2026, 14:145 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
- 24 since 21 Jun 2024 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 480000, 227700As 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) (24 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
95.7%
Sampled 8 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 14:14 | 95.7 | 95.7% |
| 10 Apr 2026, 13:11 | 97.5 | 97.5% |
| 6 Mar 2026, 14:57 | 99.5 | 99.5% |
| 11 Feb 2026, 11:27 | 98.2 | 98.2% |
| 12 Jan 2026, 11:20 | 97.1 | 97.1% |
| 1 Dec 2025, 13:33 | 97.7 | 97.7% |
| 4 Nov 2025, 12:55 | 90.2 | 90.2% |
| 6 Oct 2025, 13:09 | 94.1 | 94.1% |
| 4 Sep 2025, 12:28 | 93.4 | 93.4% |
| 8 Aug 2025, 13:35 | 92.4 | 92.4% |
| 7 Jul 2025, 11:09 | 88.3 | 88.3% |
| 9 Jun 2025, 11:11 | 91.9 | 91.9% |
| 22 May 2025, 15:04 | 95.9 | 95.9% |
| 11 Apr 2025, 15:47 | 98.9 | 98.9% |
| 28 Mar 2025, 10:25 | 99 | 99% |
| 17 Mar 2025, 11:13 | 101.4 | 101.4% |
| 27 Feb 2025, 11:11 | 100.1 | 100.1% |
| 12 Feb 2025, 11:35 | 100.1 | 100.1% |
| 5 Dec 2024, 12:56 | 95.9 | 95.9% |
| 20 Nov 2024, 13:00 | 95.7 | 95.7% |
| 17 Oct 2024, 11:15 | 93.6 | 93.6% |
| 25 Sep 2024, 11:43 | 94.9 | 94.9% |
| 22 Aug 2024, 11:30 | 89.2 | 89.2% |
| 21 Jun 2024, 15:30 | 99.9 | 99.9% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.99 mg/l
Sampled 8 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 14:14 | 9.99 | 9.99 mg/l |
| 10 Apr 2026, 13:11 | 11 | 11 mg/l |
| 6 Mar 2026, 14:57 | 11.6 | 11.6 mg/l |
| 11 Feb 2026, 11:27 | 11.6 | 11.6 mg/l |
| 12 Jan 2026, 11:20 | 12.4 | 12.4 mg/l |
| 1 Dec 2025, 13:33 | 11.4 | 11.4 mg/l |
| 4 Nov 2025, 12:55 | 9.59 | 9.59 mg/l |
| 6 Oct 2025, 13:09 | 9.94 | 9.94 mg/l |
| 4 Sep 2025, 12:28 | 9.31 | 9.31 mg/l |
| 8 Aug 2025, 13:35 | 8.94 | 8.94 mg/l |
| 7 Jul 2025, 11:09 | 8.82 | 8.82 mg/l |
| 9 Jun 2025, 11:11 | 9.3 | 9.3 mg/l |
| 22 May 2025, 15:04 | 10 | 10 mg/l |
| 11 Apr 2025, 15:47 | 10.2 | 10.2 mg/l |
| 28 Mar 2025, 10:25 | 11.1 | 11.1 mg/l |
| 17 Mar 2025, 11:13 | 12.5 | 12.5 mg/l |
| 27 Feb 2025, 11:11 | 12.1 | 12.1 mg/l |
| 12 Feb 2025, 11:35 | 13 | 13 mg/l |
| 5 Dec 2024, 12:56 | 11 | 11 mg/l |
| 20 Nov 2024, 13:00 | 11.9 | 11.9 mg/l |
| 17 Oct 2024, 11:15 | 9.86 | 9.86 mg/l |
| 25 Sep 2024, 11:43 | 9.73 | 9.73 mg/l |
| 22 Aug 2024, 11:30 | 8.99 | 8.99 mg/l |
| 21 Jun 2024, 15:30 | 9.61 | 9.61 mg/l |
Water temperature
code 0076 · °C
13.3 °C
Sampled 8 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 14:14 | 13.3 | 13.3 °C |
| 10 Apr 2026, 13:11 | 10.1 | 10.1 °C |
| 6 Mar 2026, 14:57 | 8.5 | 8.5 °C |
| 11 Feb 2026, 11:27 | 7.9 | 7.9 °C |
| 12 Jan 2026, 11:20 | 4.8 | 4.8 °C |
| 1 Dec 2025, 13:33 | 8.5 | 8.5 °C |
| 4 Nov 2025, 12:55 | 12.5 | 12.5 °C |
| 6 Oct 2025, 13:09 | 12.8 | 12.8 °C |
| 4 Sep 2025, 12:28 | 15.4 | 15.4 °C |
| 8 Aug 2025, 13:35 | 16.8 | 16.8 °C |
| 7 Jul 2025, 11:09 | 15.3 | 15.3 °C |
| 9 Jun 2025, 11:11 | 14.7 | 14.7 °C |
| 22 May 2025, 15:04 | 13.2 | 13.2 °C |
| 11 Apr 2025, 15:47 | 13.9 | 13.9 °C |
| 28 Mar 2025, 10:25 | 10.1 | 10.1 °C |
| 17 Mar 2025, 11:13 | 6.4 | 6.4 °C |
| 27 Feb 2025, 11:11 | 7.1 | 7.1 °C |
| 12 Feb 2025, 11:35 | 4.4 | 4.4 °C |
| 5 Dec 2024, 12:56 | 9.2 | 9.2 °C |
| 20 Nov 2024, 13:00 | 6.1 | 6.1 °C |
| 17 Oct 2024, 11:15 | 12.9 | 12.9 °C |
| 25 Sep 2024, 11:43 | 14.1 | 14.1 °C |
| 22 Aug 2024, 11:30 | 14.9 | 14.9 °C |
| 21 Jun 2024, 15:30 | 17.1 | 17.1 °C |
pH
code 0061
8.07
Sampled 8 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 14:14 | 8.07 | 8.07 |
| 10 Apr 2026, 13:11 | 8.17 | 8.17 |
| 6 Mar 2026, 14:57 | 8.45 | 8.45 |
| 11 Feb 2026, 11:27 | 8.04 | 8.04 |
| 12 Jan 2026, 11:20 | 8.18 | 8.18 |
| 1 Dec 2025, 13:33 | 8.25 | 8.25 |
| 4 Nov 2025, 12:55 | 8.06 | 8.06 |
| 6 Oct 2025, 13:09 | 8.3 | 8.3 |
| 4 Sep 2025, 12:28 | 8.05 | 8.05 |
| 8 Aug 2025, 13:35 | 8.25 | 8.25 |
| 7 Jul 2025, 11:09 | 7.97 | 7.97 |
| 9 Jun 2025, 11:11 | 7.96 | 7.96 |
| 22 May 2025, 15:04 | 8.03 | 8.03 |
| 11 Apr 2025, 15:47 | 8.25 | 8.25 |
| 28 Mar 2025, 10:25 | 8.39 | 8.39 |
| 17 Mar 2025, 11:13 | 8.33 | 8.33 |
| 27 Feb 2025, 11:11 | 8.25 | 8.25 |
| 12 Feb 2025, 11:35 | 8.23 | 8.23 |
| 5 Dec 2024, 12:56 | 7.98 | 7.98 |
| 20 Nov 2024, 13:00 | 8.33 | 8.33 |
| 17 Oct 2024, 11:15 | 7.9 | 7.9 |
| 25 Sep 2024, 11:43 | 7.89 | 7.89 |
| 22 Aug 2024, 11:30 | 8.07 | 8.07 |
| 21 Jun 2024, 15:30 | 7.98 | 7.98 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 8 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 14:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Apr 2026, 13:11 | 0.03 | 0.03 mg/l |
| 6 Mar 2026, 14:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Feb 2026, 11:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Jan 2026, 11:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Dec 2025, 13:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Nov 2025, 12:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Oct 2025, 13:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Sep 2025, 12:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Aug 2025, 13:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Jul 2025, 11:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jun 2025, 11:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 May 2025, 15:04 | 0.03 | 0.03 mg/l |
| 11 Apr 2025, 15:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Mar 2025, 10:25 | 0.031 | 0.031 mg/l |
| 17 Mar 2025, 11:13 | 0.04 | 0.04 mg/l |
| 27 Feb 2025, 11:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Feb 2025, 11:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Dec 2024, 12:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Nov 2024, 13:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Oct 2024, 11:15 | 0.03 | 0.03 mg/l |
| 25 Sep 2024, 11:43 | 0.048 | 0.048 mg/l |
| 22 Aug 2024, 11:30 | 0.18 | 0.18 mg/l |
| 21 Jun 2024, 15:30 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
1.39 mg/l
Sampled 8 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 14:14 | 1.39 | 1.39 mg/l |
| 10 Apr 2026, 13:11 | 2.59 | 2.59 mg/l |
| 6 Mar 2026, 14:57 | 4.49 | 4.49 mg/l |
| 11 Feb 2026, 11:27 | 4.89 | 4.89 mg/l |
| 12 Jan 2026, 11:20 | 4.39 | 4.39 mg/l |
| 1 Dec 2025, 13:33 | 2.29 | 2.29 mg/l |
| 4 Nov 2025, 12:55 | 0.756 | 0.756 mg/l |
| 6 Oct 2025, 13:09 | 1.5 | 1.5 mg/l |
| 4 Sep 2025, 12:28 | 0.456 | 0.456 mg/l |
| 8 Aug 2025, 13:35 | 1.6 | 1.6 mg/l |
| 7 Jul 2025, 11:09 | 1.59 | 1.59 mg/l |
| 9 Jun 2025, 11:11 | 1.29 | 1.29 mg/l |
| 22 May 2025, 15:04 | 1.2 | 1.2 mg/l |
| 11 Apr 2025, 15:47 | 3.28 | 3.28 mg/l |
| 28 Mar 2025, 10:25 | 3.48 | 3.48 mg/l |
| 17 Mar 2025, 11:13 | 3.98 | 3.98 mg/l |
| 27 Feb 2025, 11:11 | 3.79 | 3.79 mg/l |
| 12 Feb 2025, 11:35 | 3.89 | 3.89 mg/l |
| 20 Nov 2024, 13:00 | 2.59 | 2.59 mg/l |
| 17 Oct 2024, 11:15 | 3.06 | 3.06 mg/l |
| 25 Sep 2024, 11:43 | 2.28 | 2.28 mg/l |
| 22 Aug 2024, 11:30 | 3.95 | 3.95 mg/l |
| 21 Jun 2024, 15:30 | 1.79 | 1.79 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.021 mg/l
Sampled 8 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 14:14 | 0.021 | 0.021 mg/l |
| 10 Apr 2026, 13:11 | 0.024 | 0.024 mg/l |
| 6 Mar 2026, 14:57 | 0.021 | 0.021 mg/l |
| 11 Feb 2026, 11:27 | 0.026 | 0.026 mg/l |
| 12 Jan 2026, 11:20 | 0.021 | 0.021 mg/l |
| 1 Dec 2025, 13:33 | 0.015 | 0.015 mg/l |
| 4 Nov 2025, 12:55 | 0.012 | 0.012 mg/l |
| 6 Oct 2025, 13:09 | 0.022 | 0.022 mg/l |
| 4 Sep 2025, 12:28 | 0.037 | 0.037 mg/l |
| 8 Aug 2025, 13:35 | 0.04 | 0.04 mg/l |
| 7 Jul 2025, 11:09 | 0.06 | 0.06 mg/l |
| 9 Jun 2025, 11:11 | 0.028 | 0.028 mg/l |
| 22 May 2025, 15:04 | 0.024 | 0.024 mg/l |
| 11 Apr 2025, 15:47 | <0.01 | below 0.01 mg/l (not detected above this) |
| 28 Mar 2025, 10:25 | <0.01 | below 0.01 mg/l (not detected above this) |
| 17 Mar 2025, 11:13 | 0.01 | 0.01 mg/l |
| 27 Feb 2025, 11:11 | 0.01 | 0.01 mg/l |
| 12 Feb 2025, 11:35 | <0.01 | below 0.01 mg/l (not detected above this) |
| 5 Dec 2024, 12:56 | 0.04 | 0.04 mg/l |
| 20 Nov 2024, 13:00 | 0.021 | 0.021 mg/l |
| 17 Oct 2024, 11:15 | 0.02 | 0.02 mg/l |
| 25 Sep 2024, 11:43 | <0.01 | below 0.01 mg/l (not detected above this) |
| 22 Aug 2024, 11:30 | 0.085 | 0.085 mg/l |
| 21 Jun 2024, 15:30 | 0.038 | 0.038 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
214 µS/cm
Sampled 8 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2026, 14:14 | 214 | 214 µS/cm |
| 10 Apr 2026, 13:11 | 518 | 518 µS/cm |
| 6 Mar 2026, 14:57 | 557 | 557 µS/cm |
| 11 Feb 2026, 11:27 | 559 | 559 µS/cm |
| 12 Jan 2026, 11:20 | 572 | 572 µS/cm |
| 1 Dec 2025, 13:33 | 547 | 547 µS/cm |
| 4 Nov 2025, 12:55 | 469 | 469 µS/cm |
| 6 Oct 2025, 13:09 | 468 | 468 µS/cm |
| 4 Sep 2025, 12:28 | 392 | 392 µS/cm |
| 8 Aug 2025, 13:35 | 406 | 406 µS/cm |
| 7 Jul 2025, 11:09 | 218 | 218 µS/cm |
| 9 Jun 2025, 11:11 | 389 | 389 µS/cm |
| 22 May 2025, 15:04 | 382 | 382 µS/cm |
| 11 Apr 2025, 15:47 | 539 | 539 µS/cm |
| 28 Mar 2025, 10:25 | 577 | 577 µS/cm |
| 17 Mar 2025, 11:13 | 591 | 591 µS/cm |
| 27 Feb 2025, 11:11 | 585 | 585 µS/cm |
| 12 Feb 2025, 11:35 | 597 | 597 µS/cm |
| 5 Dec 2024, 12:56 | 534 | 534 µS/cm |
| 20 Nov 2024, 13:00 | 532 | 532 µS/cm |
| 17 Oct 2024, 11:15 | 486 | 486 µS/cm |
| 25 Sep 2024, 11:43 | 371 | 371 µS/cm |
| 22 Aug 2024, 11:30 | 524 | 524 µS/cm |
| 21 Jun 2024, 15:30 | 410 | 410 µS/cm |
Everything measured here
13 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 13 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 24 | Jun 2024 – May 2026 | 95.7% 8 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Jun 2024 – May 2026 | 9.99 mg/l 8 May 2026 |
| Temperature of Water 0076 | River water | 24 | Jun 2024 – May 2026 | 13.3 °C 8 May 2026 |
| pH 0061 | River water | 24 | Jun 2024 – May 2026 | 8.07 8 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Jun 2024 – May 2026 | below 0.03 mg/l 8 May 2026 |
| Nitrate as N 0117 | River water | 23 | Jun 2024 – May 2026 | 1.39 mg/l 8 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Jun 2024 – May 2026 | 0.021 mg/l 8 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Jun 2024 – May 2026 | 214 µS/cm 8 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Jun 2024 – May 2026 | 120 mg/l 8 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 24 | Jun 2024 – May 2026 | below 0.0007 mg/l 8 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 24 | Jun 2024 – May 2026 | 1.7 mg/l 8 May 2026 |
| Nitrite as N 0118 | River water | 24 | Jun 2024 – May 2026 | 0.007 mg/l 8 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 23 | Jun 2024 – May 2026 | 1.4 mg/l 8 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.