Byfield Brook above Cherwell
EA name: BYFIELD BROOK ABOVE CHERWELL
Environment Agency sampling point TH-PCHR0111 · 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
- 1 Sep 2026, 13:2130 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 28 since 17 Jun 2024 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Environmental monitoring statutory (EU directives)
- Where
- National Grid 453040, 251970As published, to the nearest 10 m. Open in a map
- River, by its own name
- Byfield Brook
- River, by the map
- An unnamed streamPlaced by position alone (the only river line close by), 1 m from the line.
- Next gauge downstream
- Cropredy Bridge On the River Cherwell · 15 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (28 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
79%
Sampled 1 Sep 2026, 30 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:21 | 79 | 79% |
| 14 Aug 2026, 13:27 | 79.5 | 79.5% |
| 29 Jul 2026, 12:22 | 82 | 82% |
| 22 Jun 2026, 13:27 | 82 | 82% |
| 28 May 2026, 11:27 | 79.6 | 79.6% |
| 22 Apr 2026, 14:34 | 97.5 | 97.5% |
| 10 Mar 2026, 10:35 | 95 | 95% |
| 16 Feb 2026, 11:43 | 95.9 | 95.9% |
| 30 Jan 2026, 10:30 | 95.8 | 95.8% |
| 4 Dec 2025, 13:18 | 95.8 | 95.8% |
| 7 Nov 2025, 14:14 | 69.3 | 69.3% |
| 6 Oct 2025, 11:27 | 80 | 80% |
| 10 Sep 2025, 11:20 | 89 | 89% |
| 15 Aug 2025, 10:24 | 85 | 85% |
| 18 Jul 2025, 10:37 | 87.3 | 87.3% |
| 9 Jun 2025, 12:06 | 87.4 | 87.4% |
| 22 May 2025, 11:24 | 90.2 | 90.2% |
| 3 Apr 2025, 12:14 | 98.7 | 98.7% |
| 3 Mar 2025, 11:56 | 97.3 | 97.3% |
| 6 Feb 2025, 11:59 | 97.2 | 97.2% |
| 13 Jan 2025, 11:06 | 96.2 | 96.2% |
| 16 Dec 2024, 12:43 | 96.4 | 96.4% |
| 25 Nov 2024, 11:30 | 92.2 | 92.2% |
| 7 Oct 2024, 12:34 | 96.1 | 96.1% |
| 4 Sep 2024, 09:55 | 91.1 | 91.1% |
| 15 Aug 2024, 11:22 | 90 | 90% |
| 30 Jul 2024, 10:42 | 88.3 | 88.3% |
| 17 Jun 2024, 11:09 | 92 | 92% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.79 mg/l
Sampled 1 Sep 2026, 30 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:21 | 7.79 | 7.79 mg/l |
| 14 Aug 2026, 13:27 | 7.21 | 7.21 mg/l |
| 29 Jul 2026, 12:22 | 7.68 | 7.68 mg/l |
| 22 Jun 2026, 13:27 | 7.57 | 7.57 mg/l |
| 28 May 2026, 11:27 | 7.89 | 7.89 mg/l |
| 22 Apr 2026, 14:34 | 10.5 | 10.5 mg/l |
| 10 Mar 2026, 10:35 | 11 | 11 mg/l |
| 16 Feb 2026, 11:43 | 11.8 | 11.8 mg/l |
| 30 Jan 2026, 10:30 | 11.7 | 11.7 mg/l |
| 4 Dec 2025, 13:18 | 11.2 | 11.2 mg/l |
| 7 Nov 2025, 14:14 | 7.2 | 7.2 mg/l |
| 6 Oct 2025, 11:27 | 8.49 | 8.49 mg/l |
| 10 Sep 2025, 11:20 | 9.01 | 9.01 mg/l |
| 15 Aug 2025, 10:24 | 8.3 | 8.3 mg/l |
| 18 Jul 2025, 10:37 | 8.38 | 8.38 mg/l |
| 9 Jun 2025, 12:06 | 9.13 | 9.13 mg/l |
| 22 May 2025, 11:24 | 9.74 | 9.74 mg/l |
| 3 Apr 2025, 12:14 | 10.9 | 10.9 mg/l |
| 3 Mar 2025, 11:56 | 11.8 | 11.8 mg/l |
| 6 Feb 2025, 11:59 | 12.3 | 12.3 mg/l |
| 13 Jan 2025, 11:06 | 12 | 12 mg/l |
| 16 Dec 2024, 12:43 | 10.9 | 10.9 mg/l |
| 25 Nov 2024, 11:30 | 10.6 | 10.6 mg/l |
| 7 Oct 2024, 12:34 | 10.1 | 10.1 mg/l |
| 4 Sep 2024, 09:55 | 9.53 | 9.53 mg/l |
| 15 Aug 2024, 11:22 | 9.01 | 9.01 mg/l |
| 30 Jul 2024, 10:42 | 8.77 | 8.77 mg/l |
| 17 Jun 2024, 11:09 | 9.56 | 9.56 mg/l |
Water temperature
code 0076 · °C
15.9 °C
Sampled 1 Sep 2026, 30 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:21 | 15.9 | 15.9 °C |
| 14 Aug 2026, 13:27 | 20 | 20 °C |
| 29 Jul 2026, 12:22 | 18.4 | 18.4 °C |
| 22 Jun 2026, 13:27 | 19.1 | 19.1 °C |
| 28 May 2026, 11:27 | 15.7 | 15.7 °C |
| 22 Apr 2026, 14:34 | 11.9 | 11.9 °C |
| 10 Mar 2026, 10:35 | 9 | 9 °C |
| 16 Feb 2026, 11:43 | 6.3 | 6.3 °C |
| 30 Jan 2026, 10:30 | 6.8 | 6.8 °C |
| 4 Dec 2025, 13:18 | 8.4 | 8.4 °C |
| 7 Nov 2025, 14:14 | 13.5 | 13.5 °C |
| 6 Oct 2025, 11:27 | 12.6 | 12.6 °C |
| 10 Sep 2025, 11:20 | 14.7 | 14.7 °C |
| 15 Aug 2025, 10:24 | 16.4 | 16.4 °C |
| 18 Jul 2025, 10:37 | 17.2 | 17.2 °C |
| 9 Jun 2025, 12:06 | 13.3 | 13.3 °C |
| 22 May 2025, 11:24 | 11.8 | 11.8 °C |
| 3 Apr 2025, 12:14 | 10.7 | 10.7 °C |
| 3 Mar 2025, 11:56 | 7.1 | 7.1 °C |
| 6 Feb 2025, 11:59 | 5.3 | 5.3 °C |
| 13 Jan 2025, 11:06 | 5.8 | 5.8 °C |
| 16 Dec 2024, 12:43 | 9.7 | 9.7 °C |
| 25 Nov 2024, 11:30 | 9.3 | 9.3 °C |
| 7 Oct 2024, 12:34 | 13.1 | 13.1 °C |
| 4 Sep 2024, 09:55 | 13.2 | 13.2 °C |
| 15 Aug 2024, 11:22 | 15.2 | 15.2 °C |
| 30 Jul 2024, 10:42 | 15.6 | 15.6 °C |
| 17 Jun 2024, 11:09 | 13.5 | 13.5 °C |
pH
code 0061
7.66
Sampled 1 Sep 2026, 30 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:21 | 7.66 | 7.66 |
| 14 Aug 2026, 13:27 | 7.67 | 7.67 |
| 29 Jul 2026, 12:22 | 7.72 | 7.72 |
| 22 Jun 2026, 13:27 | 7.6 | 7.6 |
| 28 May 2026, 11:27 | 7.71 | 7.71 |
| 22 Apr 2026, 14:34 | 7.77 | 7.77 |
| 10 Mar 2026, 10:35 | 8.19 | 8.19 |
| 16 Feb 2026, 11:43 | 7.75 | 7.75 |
| 30 Jan 2026, 10:30 | 7.83 | 7.83 |
| 4 Dec 2025, 13:18 | 7.82 | 7.82 |
| 7 Nov 2025, 14:14 | 7.36 | 7.36 |
| 6 Oct 2025, 11:27 | 7.57 | 7.57 |
| 10 Sep 2025, 11:20 | 7.73 | 7.73 |
| 15 Aug 2025, 10:24 | 7.8 | 7.8 |
| 18 Jul 2025, 10:37 | 7.81 | 7.81 |
| 9 Jun 2025, 12:06 | 7.66 | 7.66 |
| 22 May 2025, 11:24 | 7.69 | 7.69 |
| 3 Apr 2025, 12:14 | 7.83 | 7.83 |
| 3 Mar 2025, 11:56 | 7.87 | 7.87 |
| 6 Feb 2025, 11:59 | 7.87 | 7.87 |
| 13 Jan 2025, 11:06 | 7.89 | 7.89 |
| 16 Dec 2024, 12:43 | 7.88 | 7.88 |
| 25 Nov 2024, 11:30 | 7.59 | 7.59 |
| 7 Oct 2024, 12:34 | 7.74 | 7.74 |
| 4 Sep 2024, 09:55 | 7.82 | 7.82 |
| 15 Aug 2024, 11:22 | 7.51 | 7.51 |
| 30 Jul 2024, 10:42 | 7.74 | 7.74 |
| 17 Jun 2024, 11:09 | 7.73 | 7.73 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 1 Sep 2026, 30 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:21 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Aug 2026, 13:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Jul 2026, 12:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jun 2026, 13:27 | 0.034 | 0.034 mg/l |
| 28 May 2026, 11:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Apr 2026, 14:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Mar 2026, 10:35 | 0.041 | 0.041 mg/l |
| 16 Feb 2026, 11:43 | 0.21 | 0.21 mg/l |
| 30 Jan 2026, 10:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Dec 2025, 13:18 | 0.04 | 0.04 mg/l |
| 7 Nov 2025, 14:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Oct 2025, 11:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Sep 2025, 11:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Aug 2025, 10:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jul 2025, 10:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jun 2025, 12:06 | 0.042 | 0.042 mg/l |
| 22 May 2025, 11:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Mar 2025, 11:56 | 0.035 | 0.035 mg/l |
| 6 Feb 2025, 11:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Jan 2025, 11:06 | 0.046 | 0.046 mg/l |
| 16 Dec 2024, 12:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Nov 2024, 11:30 | 0.066 | 0.066 mg/l |
| 7 Oct 2024, 12:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Sep 2024, 09:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Aug 2024, 11:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Jul 2024, 10:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jun 2024, 11:09 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
20 mg/l
Sampled 1 Sep 2026, 30 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:21 | 20 | 20 mg/l |
| 14 Aug 2026, 13:27 | 23 | 23 mg/l |
| 29 Jul 2026, 12:22 | 20 | 20 mg/l |
| 22 Jun 2026, 13:27 | 23 | 23 mg/l |
| 28 May 2026, 11:27 | 22.9 | 22.9 mg/l |
| 22 Apr 2026, 14:34 | 17 | 17 mg/l |
| 10 Mar 2026, 10:35 | 13 | 13 mg/l |
| 16 Feb 2026, 11:43 | 7.39 | 7.39 mg/l |
| 30 Jan 2026, 10:30 | 11 | 11 mg/l |
| 4 Dec 2025, 13:18 | 12 | 12 mg/l |
| 7 Nov 2025, 14:14 | 24 | 24 mg/l |
| 6 Oct 2025, 11:27 | 19 | 19 mg/l |
| 10 Sep 2025, 11:20 | 25 | 25 mg/l |
| 15 Aug 2025, 10:24 | 16 | 16 mg/l |
| 18 Jul 2025, 10:37 | 16 | 16 mg/l |
| 9 Jun 2025, 12:06 | 20 | 20 mg/l |
| 22 May 2025, 11:24 | 27 | 27 mg/l |
| 3 Mar 2025, 11:56 | 12 | 12 mg/l |
| 6 Feb 2025, 11:59 | 12 | 12 mg/l |
| 13 Jan 2025, 11:06 | 12 | 12 mg/l |
| 16 Dec 2024, 12:43 | 11 | 11 mg/l |
| 25 Nov 2024, 11:30 | 7.09 | 7.09 mg/l |
| 7 Oct 2024, 12:34 | 11 | 11 mg/l |
| 4 Sep 2024, 09:55 | 14 | 14 mg/l |
| 15 Aug 2024, 11:22 | 19 | 19 mg/l |
| 30 Jul 2024, 10:42 | 18 | 18 mg/l |
| 17 Jun 2024, 11:09 | 17 | 17 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.086 mg/l
Sampled 1 Sep 2026, 30 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:21 | 0.086 | 0.086 mg/l |
| 29 Jul 2026, 12:22 | 0.091 | 0.091 mg/l |
| 22 Jun 2026, 13:27 | 0.093 | 0.093 mg/l |
| 28 May 2026, 11:27 | 0.095 | 0.095 mg/l |
| 22 Apr 2026, 14:34 | 0.062 | 0.062 mg/l |
| 10 Mar 2026, 10:35 | 0.038 | 0.038 mg/l |
| 16 Feb 2026, 11:43 | 0.095 | 0.095 mg/l |
| 30 Jan 2026, 10:30 | 0.047 | 0.047 mg/l |
| 4 Dec 2025, 13:18 | 0.061 | 0.061 mg/l |
| 7 Nov 2025, 14:14 | 0.087 | 0.087 mg/l |
| 6 Oct 2025, 11:27 | 0.033 | 0.033 mg/l |
| 10 Sep 2025, 11:20 | 0.2 | 0.2 mg/l |
| 15 Aug 2025, 10:24 | 0.052 | 0.052 mg/l |
| 18 Jul 2025, 10:37 | 0.062 | 0.062 mg/l |
| 9 Jun 2025, 12:06 | 0.081 | 0.081 mg/l |
| 22 May 2025, 11:24 | 0.1 | 0.1 mg/l |
| 3 Mar 2025, 11:56 | 0.033 | 0.033 mg/l |
| 6 Feb 2025, 11:59 | 0.035 | 0.035 mg/l |
| 13 Jan 2025, 11:06 | 0.069 | 0.069 mg/l |
| 16 Dec 2024, 12:43 | 0.041 | 0.041 mg/l |
| 25 Nov 2024, 11:30 | 0.05 | 0.05 mg/l |
| 7 Oct 2024, 12:34 | 0.037 | 0.037 mg/l |
| 4 Sep 2024, 09:55 | 0.048 | 0.048 mg/l |
| 15 Aug 2024, 11:22 | 0.088 | 0.088 mg/l |
| 30 Jul 2024, 10:42 | 0.055 | 0.055 mg/l |
| 17 Jun 2024, 11:09 | 0.18 | 0.18 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
875 µS/cm
Sampled 1 Sep 2026, 30 days ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 13:21 | 875 | 875 µS/cm |
| 14 Aug 2026, 13:27 | 904 | 904 µS/cm |
| 29 Jul 2026, 12:22 | 889 | 889 µS/cm |
| 22 Jun 2026, 13:27 | 883 | 883 µS/cm |
| 28 May 2026, 11:27 | 863 | 863 µS/cm |
| 22 Apr 2026, 14:34 | 763 | 763 µS/cm |
| 10 Mar 2026, 10:35 | 646 | 646 µS/cm |
| 16 Feb 2026, 11:43 | 423 | 423 µS/cm |
| 30 Jan 2026, 10:30 | 571 | 571 µS/cm |
| 4 Dec 2025, 13:18 | 573 | 573 µS/cm |
| 7 Nov 2025, 14:14 | 863 | 863 µS/cm |
| 6 Oct 2025, 11:27 | 830 | 830 µS/cm |
| 10 Sep 2025, 11:20 | 871 | 871 µS/cm |
| 15 Aug 2025, 10:24 | 832 | 832 µS/cm |
| 18 Jul 2025, 10:37 | 807 | 807 µS/cm |
| 9 Jun 2025, 12:06 | 788 | 788 µS/cm |
| 22 May 2025, 11:24 | 895 | 895 µS/cm |
| 3 Apr 2025, 12:14 | 774 | 774 µS/cm |
| 3 Mar 2025, 11:56 | 650 | 650 µS/cm |
| 6 Feb 2025, 11:59 | 624 | 624 µS/cm |
| 13 Jan 2025, 11:06 | 659 | 659 µS/cm |
| 16 Dec 2024, 12:43 | 620 | 620 µS/cm |
| 25 Nov 2024, 11:30 | 355 | 355 µS/cm |
| 7 Oct 2024, 12:34 | 621 | 621 µS/cm |
| 4 Sep 2024, 09:55 | 811 | 811 µS/cm |
| 15 Aug 2024, 11:22 | 877 | 877 µS/cm |
| 30 Jul 2024, 10:42 | 838 | 838 µS/cm |
| 17 Jun 2024, 11:09 | 796 | 796 µS/cm |
Everything measured here
14 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 14 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 28 | Jun 2024 – Sep 2026 | 79% 1 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 28 | Jun 2024 – Sep 2026 | 7.79 mg/l 1 Sep 2026 |
| Temperature of Water 0076 | River water | 28 | Jun 2024 – Sep 2026 | 15.9 °C 1 Sep 2026 |
| pH 0061 | River water | 28 | Jun 2024 – Sep 2026 | 7.66 1 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 27 | Jun 2024 – Sep 2026 | below 0.03 mg/l 1 Sep 2026 |
| Nitrate as N 0117 | River water | 27 | Jun 2024 – Sep 2026 | 20 mg/l 1 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 26 | Jun 2024 – Sep 2026 | 0.086 mg/l 1 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 28 | Jun 2024 – Sep 2026 | 875 µS/cm 1 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 27 | Jun 2024 – Sep 2026 | 120 mg/l 1 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 27 | Jun 2024 – Sep 2026 | below 0.00039 mg/l 1 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 20 | Jun 2024 – Mar 2026 | 1.6 mg/l 10 Mar 2026 |
| Nitrite as N 0118 | River water | 27 | Jun 2024 – Sep 2026 | 0.013 mg/l 1 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 27 | Jun 2024 – Sep 2026 | 20 mg/l 1 Sep 2026 |
| Phosphorus, Total as P 0348 | River water | 8 | Aug 2025 – Mar 2026 | 0.061 mg/l 10 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.