Childrey Brook at Mill Road Marcham
EA name: CHILDREY BROOK AT MILL ROAD MARCHAM
Environment Agency sampling point TH-POCR0001 · 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, 11:2130 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 22 since 13 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 445647, 195318As published, to the nearest 1 m. Open in a map
- River, by its own name
- Childrey Brook
- River, by the map
- Childrey BrookPlaced on the river its name gives, 27 m from the line.
- Next gauge downstream
- Abingdon On the River Ock · 3.2 km along the river
- Nearest gauge upstream
- Wantage On the Letcombe Brook · 13 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (22 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
85.4%
Sampled 1 Sep 2026, 30 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:21 | 85.4 | 85.4% |
| 27 Jul 2026, 13:09 | 85.6 | 85.6% |
| 16 Jun 2026, 10:46 | 88.1 | 88.1% |
| 11 May 2026, 10:21 | 91.3 | 91.3% |
| 20 Apr 2026, 09:18 | 93.4 | 93.4% |
| 20 Mar 2026, 09:43 | 102 | 102% |
| 3 Feb 2026, 09:38 | 80.8 | 80.8% |
| 8 Jan 2026, 12:31 | 90.6 | 90.6% |
| 5 Dec 2025, 15:33 | 89.6 | 89.6% |
| 6 Nov 2025, 11:33 | 76.1 | 76.1% |
| 1 Oct 2025, 12:29 | 87.2 | 87.2% |
| 28 Apr 2025, 10:02 | 98.9 | 98.9% |
| 31 Mar 2025, 09:38 | 91.6 | 91.6% |
| 3 Mar 2025, 10:52 | 94.1 | 94.1% |
| 7 Feb 2025, 09:50 | 95 | 95% |
| 11 Dec 2024, 12:17 | 92.4 | 92.4% |
| 21 Nov 2024, 11:45 | 86.1 | 86.1% |
| 17 Oct 2024, 14:35 | 78.3 | 78.3% |
| 30 Sep 2024, 14:27 | 69.1 | 69.1% |
| 5 Aug 2024, 11:24 | 87.8 | 87.8% |
| 8 Jul 2024, 14:00 | 86.9 | 86.9% |
| 13 Jun 2024, 10:29 | 92.4 | 92.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.44 mg/l
Sampled 1 Sep 2026, 30 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:21 | 8.44 | 8.44 mg/l |
| 27 Jul 2026, 13:09 | 8.12 | 8.12 mg/l |
| 16 Jun 2026, 10:46 | 8.49 | 8.49 mg/l |
| 11 May 2026, 10:21 | 10.3 | 10.3 mg/l |
| 20 Apr 2026, 09:18 | 10.5 | 10.5 mg/l |
| 20 Mar 2026, 09:43 | 12 | 12 mg/l |
| 3 Feb 2026, 09:38 | 9.7 | 9.7 mg/l |
| 8 Jan 2026, 12:31 | 11.4 | 11.4 mg/l |
| 5 Dec 2025, 15:33 | 10.9 | 10.9 mg/l |
| 6 Nov 2025, 11:33 | 7.96 | 7.96 mg/l |
| 1 Oct 2025, 12:29 | 9.29 | 9.29 mg/l |
| 28 Apr 2025, 10:02 | 10.4 | 10.4 mg/l |
| 31 Mar 2025, 09:38 | 10.4 | 10.4 mg/l |
| 3 Mar 2025, 10:52 | 11.6 | 11.6 mg/l |
| 7 Feb 2025, 09:50 | 11.8 | 11.8 mg/l |
| 11 Dec 2024, 12:17 | 11 | 11 mg/l |
| 21 Nov 2024, 11:45 | 10.6 | 10.6 mg/l |
| 17 Oct 2024, 14:35 | 8.05 | 8.05 mg/l |
| 30 Sep 2024, 14:27 | 7.2 | 7.2 mg/l |
| 5 Aug 2024, 11:24 | 8.5 | 8.5 mg/l |
| 8 Jul 2024, 14:00 | 8.82 | 8.82 mg/l |
| 13 Jun 2024, 10:29 | 9.91 | 9.91 mg/l |
Water temperature
code 0076 · °C
15.8 °C
Sampled 1 Sep 2026, 30 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:21 | 15.8 | 15.8 °C |
| 27 Jul 2026, 13:09 | 17.8 | 17.8 °C |
| 16 Jun 2026, 10:46 | 17 | 17 °C |
| 11 May 2026, 10:21 | 10.1 | 10.1 °C |
| 20 Apr 2026, 09:18 | 10 | 10 °C |
| 20 Mar 2026, 09:43 | 8.1 | 8.1 °C |
| 3 Feb 2026, 09:38 | 7.4 | 7.4 °C |
| 8 Jan 2026, 12:31 | 5.6 | 5.6 °C |
| 5 Dec 2025, 15:33 | 6.9 | 6.9 °C |
| 6 Nov 2025, 11:33 | 13.2 | 13.2 °C |
| 1 Oct 2025, 12:29 | 12.4 | 12.4 °C |
| 28 Apr 2025, 10:02 | 13 | 13 °C |
| 31 Mar 2025, 09:38 | 9.5 | 9.5 °C |
| 3 Mar 2025, 10:52 | 6.4 | 6.4 °C |
| 7 Feb 2025, 09:50 | 5.9 | 5.9 °C |
| 11 Dec 2024, 12:17 | 7.7 | 7.7 °C |
| 21 Nov 2024, 11:45 | 6.2 | 6.2 °C |
| 17 Oct 2024, 14:35 | 14 | 14 °C |
| 30 Sep 2024, 14:27 | 13.4 | 13.4 °C |
| 5 Aug 2024, 11:24 | 16.8 | 16.8 °C |
| 8 Jul 2024, 14:00 | 14.6 | 14.6 °C |
| 13 Jun 2024, 10:29 | 12.1 | 12.1 °C |
pH
code 0061
7.91
Sampled 1 Sep 2026, 30 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:21 | 7.91 | 7.91 |
| 27 Jul 2026, 13:09 | 7.96 | 7.96 |
| 16 Jun 2026, 10:46 | 7.96 | 7.96 |
| 11 May 2026, 10:21 | 8.05 | 8.05 |
| 20 Apr 2026, 09:18 | 8.16 | 8.16 |
| 20 Mar 2026, 09:43 | 8.5 | 8.5 |
| 3 Feb 2026, 09:38 | 8.03 | 8.03 |
| 8 Jan 2026, 12:31 | 8.17 | 8.17 |
| 5 Dec 2025, 15:33 | 8.09 | 8.09 |
| 6 Nov 2025, 11:33 | 7.9 | 7.9 |
| 1 Oct 2025, 12:29 | 7.93 | 7.93 |
| 28 Apr 2025, 10:02 | 8.17 | 8.17 |
| 31 Mar 2025, 09:38 | 8.06 | 8.06 |
| 3 Mar 2025, 10:52 | 8.14 | 8.14 |
| 7 Feb 2025, 09:50 | 8.12 | 8.12 |
| 11 Dec 2024, 12:17 | 8.06 | 8.06 |
| 21 Nov 2024, 11:45 | 7.95 | 7.95 |
| 17 Oct 2024, 14:35 | 7.88 | 7.88 |
| 30 Sep 2024, 14:27 | 7.69 | 7.69 |
| 5 Aug 2024, 11:24 | 7.97 | 7.97 |
| 8 Jul 2024, 14:00 | 7.95 | 7.95 |
| 13 Jun 2024, 10:29 | 8.31 | 8.31 |
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 · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:21 | <0.03 | below 0.03 mg/l (not detected above this) |
| 27 Jul 2026, 13:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jun 2026, 10:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 May 2026, 10:21 | 0.25 | 0.25 mg/l |
| 20 Apr 2026, 09:18 | 0.056 | 0.056 mg/l |
| 20 Mar 2026, 09:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Feb 2026, 09:38 | 0.11 | 0.11 mg/l |
| 8 Jan 2026, 12:31 | 0.36 | 0.36 mg/l |
| 5 Dec 2025, 15:33 | 0.058 | 0.058 mg/l |
| 6 Nov 2025, 11:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Oct 2025, 12:29 | 0.032 | 0.032 mg/l |
| 28 Apr 2025, 10:02 | 0.037 | 0.037 mg/l |
| 31 Mar 2025, 09:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Mar 2025, 10:52 | 0.092 | 0.092 mg/l |
| 7 Feb 2025, 09:50 | 0.093 | 0.093 mg/l |
| 11 Dec 2024, 12:17 | 0.069 | 0.069 mg/l |
| 21 Nov 2024, 11:45 | 0.16 | 0.16 mg/l |
| 17 Oct 2024, 14:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Sep 2024, 14:27 | 0.18 | 0.18 mg/l |
| 5 Aug 2024, 11:24 | 0.04 | 0.04 mg/l |
| 8 Jul 2024, 14:00 | 0.073 | 0.073 mg/l |
| 13 Jun 2024, 10:29 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
13.9 mg/l
Sampled 1 Sep 2026, 30 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:21 | 13.9 | 13.9 mg/l |
| 27 Jul 2026, 13:09 | 13.9 | 13.9 mg/l |
| 16 Jun 2026, 10:46 | 11.9 | 11.9 mg/l |
| 11 May 2026, 10:21 | 11.8 | 11.8 mg/l |
| 20 Apr 2026, 09:18 | 9.88 | 9.88 mg/l |
| 20 Mar 2026, 09:43 | 8.83 | 8.83 mg/l |
| 3 Feb 2026, 09:38 | 8.74 | 8.74 mg/l |
| 8 Jan 2026, 12:31 | 9.82 | 9.82 mg/l |
| 5 Dec 2025, 15:33 | 13.9 | 13.9 mg/l |
| 6 Nov 2025, 11:33 | 14.9 | 14.9 mg/l |
| 1 Oct 2025, 12:29 | 15.9 | 15.9 mg/l |
| 28 Apr 2025, 10:02 | 10.9 | 10.9 mg/l |
| 31 Mar 2025, 09:38 | 9.32 | 9.32 mg/l |
| 3 Mar 2025, 10:52 | 8.44 | 8.44 mg/l |
| 7 Feb 2025, 09:50 | 8.84 | 8.84 mg/l |
| 11 Dec 2024, 12:17 | 8.24 | 8.24 mg/l |
| 21 Nov 2024, 11:45 | 7.61 | 7.61 mg/l |
| 17 Oct 2024, 14:35 | 6.25 | 6.25 mg/l |
| 30 Sep 2024, 14:27 | 5.29 | 5.29 mg/l |
| 5 Aug 2024, 11:24 | 11.9 | 11.9 mg/l |
| 8 Jul 2024, 14:00 | 8.43 | 8.43 mg/l |
| 13 Jun 2024, 10:29 | 4.89 | 4.89 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.21 mg/l
Sampled 1 Sep 2026, 30 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:21 | 0.21 | 0.21 mg/l |
| 27 Jul 2026, 13:09 | 0.15 | 0.15 mg/l |
| 16 Jun 2026, 10:46 | 0.2 | 0.2 mg/l |
| 11 May 2026, 10:21 | 0.21 | 0.21 mg/l |
| 20 Apr 2026, 09:18 | 0.096 | 0.096 mg/l |
| 20 Mar 2026, 09:43 | 0.11 | 0.11 mg/l |
| 3 Feb 2026, 09:38 | 0.14 | 0.14 mg/l |
| 8 Jan 2026, 12:31 | 0.12 | 0.12 mg/l |
| 5 Dec 2025, 15:33 | 0.16 | 0.16 mg/l |
| 6 Nov 2025, 11:33 | 0.18 | 0.18 mg/l |
| 1 Oct 2025, 12:29 | 0.16 | 0.16 mg/l |
| 28 Apr 2025, 10:02 | 0.14 | 0.14 mg/l |
| 31 Mar 2025, 09:38 | 0.093 | 0.093 mg/l |
| 3 Mar 2025, 10:52 | 0.11 | 0.11 mg/l |
| 7 Feb 2025, 09:50 | 0.12 | 0.12 mg/l |
| 11 Dec 2024, 12:17 | 0.11 | 0.11 mg/l |
| 21 Nov 2024, 11:45 | 0.16 | 0.16 mg/l |
| 17 Oct 2024, 14:35 | 0.16 | 0.16 mg/l |
| 30 Sep 2024, 14:27 | 0.2 | 0.2 mg/l |
| 5 Aug 2024, 11:24 | 0.16 | 0.16 mg/l |
| 8 Jul 2024, 14:00 | 0.15 | 0.15 mg/l |
| 13 Jun 2024, 10:29 | 0.15 | 0.15 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
741 µS/cm
Sampled 1 Sep 2026, 30 days ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 1 Sep 2026, 11:21 | 741 | 741 µS/cm |
| 27 Jul 2026, 13:09 | 702 | 702 µS/cm |
| 16 Jun 2026, 10:46 | 691 | 691 µS/cm |
| 11 May 2026, 10:21 | 670 | 670 µS/cm |
| 20 Apr 2026, 09:18 | 650 | 650 µS/cm |
| 20 Mar 2026, 09:43 | 652 | 652 µS/cm |
| 3 Feb 2026, 09:38 | 645 | 645 µS/cm |
| 8 Jan 2026, 12:31 | 713 | 713 µS/cm |
| 5 Dec 2025, 15:33 | 727 | 727 µS/cm |
| 6 Nov 2025, 11:33 | 776 | 776 µS/cm |
| 1 Oct 2025, 12:29 | 788 | 788 µS/cm |
| 28 Apr 2025, 10:02 | 658 | 658 µS/cm |
| 31 Mar 2025, 09:38 | 614 | 614 µS/cm |
| 3 Mar 2025, 10:52 | 670 | 670 µS/cm |
| 7 Feb 2025, 09:50 | 674 | 674 µS/cm |
| 11 Dec 2024, 12:17 | 671 | 671 µS/cm |
| 21 Nov 2024, 11:45 | 681 | 681 µS/cm |
| 17 Oct 2024, 14:35 | 652 | 652 µS/cm |
| 30 Sep 2024, 14:27 | 635 | 635 µS/cm |
| 5 Aug 2024, 11:24 | 683 | 683 µS/cm |
| 8 Jul 2024, 14:00 | 633 | 633 µS/cm |
| 13 Jun 2024, 10:29 | 759 | 759 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 | 22 | Jun 2024 – Sep 2026 | 85.4% 1 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | Jun 2024 – Sep 2026 | 8.44 mg/l 1 Sep 2026 |
| Temperature of Water 0076 | River water | 22 | Jun 2024 – Sep 2026 | 15.8 °C 1 Sep 2026 |
| pH 0061 | River water | 22 | Jun 2024 – Sep 2026 | 7.91 1 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 22 | Jun 2024 – Sep 2026 | below 0.03 mg/l 1 Sep 2026 |
| Nitrate as N 0117 | River water | 22 | Jun 2024 – Sep 2026 | 13.9 mg/l 1 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 22 | Jun 2024 – Sep 2026 | 0.21 mg/l 1 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 22 | Jun 2024 – Sep 2026 | 741 µS/cm 1 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 22 | Jun 2024 – Sep 2026 | 200 mg/l 1 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | Jun 2024 – Sep 2026 | below 0.00068 mg/l 1 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – Sep 2026 | below 3 mg/l 1 Sep 2026 |
| Nitrite as N 0118 | River water | 22 | Jun 2024 – Sep 2026 | 0.075 mg/l 1 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 22 | Jun 2024 – Sep 2026 | 14 mg/l 1 Sep 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.