Warpsgrove Ditch near Reservoir, Chalgrove Common
EA name: WARPSGROVE DITCH NEAR RESERVOIR, CHALGRO (also listed as “WARPSGROVE DITCH NEAR RESERVOIR, CHALGROVE COMMON”)
Environment Agency sampling point TH-PTAR0065 · 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
- 4 Sep 2026, 13:4027 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 26 since 31 Jul 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 464201, 199178As published, to the nearest 1 m. Open in a map
- River, by its own name
- Warpsgrove Ditch
- River, by the map
- Not placedNearest line is 295 m away and its name does not agree. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Environmental monitoring statutory (EU directives) (26 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
67.5%
Sampled 4 Sep 2026, 27 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:40 | 67.5 | 67.5% |
| 20 Jul 2026, 08:56 | 73.5 | 73.5% |
| 25 Jun 2026, 08:58 | 58.8 | 58.8% |
| 20 May 2026, 09:00 | 62.1 | 62.1% |
| 15 Apr 2026, 13:09 | 99.8 | 99.8% |
| 4 Mar 2026, 13:21 | 98.7 | 98.7% |
| 9 Jan 2026, 14:27 | 90.6 | 90.6% |
| 17 Dec 2025, 09:11 | 83.2 | 83.2% |
| 26 Nov 2025, 09:07 | 62.8 | 62.8% |
| 23 Oct 2025, 09:37 | 58.5 | 58.5% |
| 8 Sep 2025, 13:23 | 59.8 | 59.8% |
| 6 Aug 2025, 09:03 | 72.8 | 72.8% |
| 18 Jul 2025, 12:57 | 78.1 | 78.1% |
| 25 Jun 2025, 08:45 | 62.2 | 62.2% |
| 11 Jun 2025, 11:44 | 82.3 | 82.3% |
| 27 May 2025, 11:33 | 77.4 | 77.4% |
| 31 Mar 2025, 11:46 | 109.9 | 109.9% |
| 14 Mar 2025, 09:01 | 82.9 | 82.9% |
| 25 Feb 2025, 08:51 | 89.5 | 89.5% |
| 29 Jan 2025, 13:25 | 79.9 | 79.9% |
| 17 Dec 2024, 13:34 | 79.1 | 79.1% |
| 13 Nov 2024, 09:21 | 62 | 62% |
| 7 Oct 2024, 10:21 | 47.3 | 47.3% |
| 10 Sep 2024, 12:26 | 66.4 | 66.4% |
| 9 Aug 2024, 12:29 | 72.5 | 72.5% |
| 31 Jul 2024, 10:02 | 67.7 | 67.7% |
Dissolved oxygen
as O2 · code 9924 · mg/l
6.31 mg/l
Sampled 4 Sep 2026, 27 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:40 | 6.31 | 6.31 mg/l |
| 20 Jul 2026, 08:56 | 7.36 | 7.36 mg/l |
| 25 Jun 2026, 08:58 | 5.12 | 5.12 mg/l |
| 20 May 2026, 09:00 | 6.47 | 6.47 mg/l |
| 15 Apr 2026, 13:09 | 10.6 | 10.6 mg/l |
| 4 Mar 2026, 13:21 | 11.3 | 11.3 mg/l |
| 9 Jan 2026, 14:27 | 11.6 | 11.6 mg/l |
| 17 Dec 2025, 09:11 | 10 | 10 mg/l |
| 26 Nov 2025, 09:07 | 7.93 | 7.93 mg/l |
| 23 Oct 2025, 09:37 | 6.28 | 6.28 mg/l |
| 8 Sep 2025, 13:23 | 5.67 | 5.67 mg/l |
| 6 Aug 2025, 09:03 | 7.47 | 7.47 mg/l |
| 18 Jul 2025, 12:57 | 7.2 | 7.2 mg/l |
| 25 Jun 2025, 08:45 | 5.89 | 5.89 mg/l |
| 11 Jun 2025, 11:44 | 8.35 | 8.35 mg/l |
| 27 May 2025, 11:33 | 8.14 | 8.14 mg/l |
| 31 Mar 2025, 11:46 | 11.7 | 11.7 mg/l |
| 14 Mar 2025, 09:01 | 10.6 | 10.6 mg/l |
| 25 Feb 2025, 08:51 | 10.7 | 10.7 mg/l |
| 29 Jan 2025, 13:25 | 9.69 | 9.69 mg/l |
| 17 Dec 2024, 13:34 | 9.04 | 9.04 mg/l |
| 13 Nov 2024, 09:21 | 7.09 | 7.09 mg/l |
| 7 Oct 2024, 10:21 | 4.93 | 4.93 mg/l |
| 10 Sep 2024, 12:26 | 6.5 | 6.5 mg/l |
| 9 Aug 2024, 12:29 | 6.71 | 6.71 mg/l |
| 31 Jul 2024, 10:02 | 6.23 | 6.23 mg/l |
Water temperature
code 0076 · °C
18.5 °C
Sampled 4 Sep 2026, 27 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:40 | 18.5 | 18.5 °C |
| 20 Jul 2026, 08:56 | 15.2 | 15.2 °C |
| 25 Jun 2026, 08:58 | 22.1 | 22.1 °C |
| 20 May 2026, 09:00 | 13.4 | 13.4 °C |
| 15 Apr 2026, 13:09 | 12.5 | 12.5 °C |
| 4 Mar 2026, 13:21 | 9.2 | 9.2 °C |
| 9 Jan 2026, 14:27 | 4.7 | 4.7 °C |
| 17 Dec 2025, 09:11 | 7.2 | 7.2 °C |
| 26 Nov 2025, 09:07 | 5.4 | 5.4 °C |
| 23 Oct 2025, 09:37 | 12.1 | 12.1 °C |
| 8 Sep 2025, 13:23 | 17.8 | 17.8 °C |
| 6 Aug 2025, 09:03 | 14.1 | 14.1 °C |
| 18 Jul 2025, 12:57 | 19.2 | 19.2 °C |
| 25 Jun 2025, 08:45 | 17.9 | 17.9 °C |
| 11 Jun 2025, 11:44 | 14.6 | 14.6 °C |
| 27 May 2025, 11:33 | 13 | 13 °C |
| 31 Mar 2025, 11:46 | 12.3 | 12.3 °C |
| 14 Mar 2025, 09:01 | 4.9 | 4.9 °C |
| 25 Feb 2025, 08:51 | 7.5 | 7.5 °C |
| 29 Jan 2025, 13:25 | 7 | 7 °C |
| 17 Dec 2024, 13:34 | 9.4 | 9.4 °C |
| 13 Nov 2024, 09:21 | 9.4 | 9.4 °C |
| 7 Oct 2024, 10:21 | 13.4 | 13.4 °C |
| 10 Sep 2024, 12:26 | 16.3 | 16.3 °C |
| 9 Aug 2024, 12:29 | 19 | 19 °C |
| 31 Jul 2024, 10:02 | 19.3 | 19.3 °C |
pH
code 0061
7.44
Sampled 4 Sep 2026, 27 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:40 | 7.44 | 7.44 |
| 20 Jul 2026, 08:56 | 7.72 | 7.72 |
| 25 Jun 2026, 08:58 | 7.52 | 7.52 |
| 20 May 2026, 09:00 | 7.5 | 7.5 |
| 15 Apr 2026, 13:09 | 8.02 | 8.02 |
| 4 Mar 2026, 13:21 | 8.14 | 8.14 |
| 9 Jan 2026, 14:27 | 7.67 | 7.67 |
| 17 Dec 2025, 09:11 | 7.77 | 7.77 |
| 26 Nov 2025, 09:07 | 7.74 | 7.74 |
| 23 Oct 2025, 09:37 | 7.64 | 7.64 |
| 8 Sep 2025, 13:23 | 7.63 | 7.63 |
| 6 Aug 2025, 09:03 | 7.66 | 7.66 |
| 18 Jul 2025, 12:57 | 8 | 8 |
| 25 Jun 2025, 08:45 | 7.46 | 7.46 |
| 11 Jun 2025, 11:44 | 7.82 | 7.82 |
| 27 May 2025, 11:33 | 8.02 | 8.02 |
| 31 Mar 2025, 11:46 | 8.23 | 8.23 |
| 14 Mar 2025, 09:01 | 8.07 | 8.07 |
| 25 Feb 2025, 08:51 | 7.92 | 7.92 |
| 29 Jan 2025, 13:25 | 7.76 | 7.76 |
| 17 Dec 2024, 13:34 | 7.88 | 7.88 |
| 13 Nov 2024, 09:21 | 7.62 | 7.62 |
| 7 Oct 2024, 10:21 | 7.51 | 7.51 |
| 10 Sep 2024, 12:26 | 7.68 | 7.68 |
| 9 Aug 2024, 12:29 | 7.69 | 7.69 |
| 31 Jul 2024, 10:02 | 7.61 | 7.61 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 4 Sep 2026, 27 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jul 2026, 08:56 | 0.032 | 0.032 mg/l |
| 25 Jun 2026, 08:58 | 0.06 | 0.06 mg/l |
| 20 May 2026, 09:00 | 0.051 | 0.051 mg/l |
| 15 Apr 2026, 13:09 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2026, 13:21 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jan 2026, 14:27 | 0.27 | 0.27 mg/l |
| 17 Dec 2025, 09:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Nov 2025, 09:07 | 0.047 | 0.047 mg/l |
| 23 Oct 2025, 09:37 | 0.2 | 0.2 mg/l |
| 8 Sep 2025, 13:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Aug 2025, 09:03 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jul 2025, 12:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Jun 2025, 08:45 | 0.17 | 0.17 mg/l |
| 11 Jun 2025, 11:44 | 0.055 | 0.055 mg/l |
| 27 May 2025, 11:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 31 Mar 2025, 11:46 | 0.15 | 0.15 mg/l |
| 14 Mar 2025, 09:01 | 0.4 | 0.4 mg/l |
| 25 Feb 2025, 08:51 | 0.2 | 0.2 mg/l |
| 29 Jan 2025, 13:25 | 0.75 | 0.75 mg/l |
| 17 Dec 2024, 13:34 | 0.13 | 0.13 mg/l |
| 13 Nov 2024, 09:21 | 0.17 | 0.17 mg/l |
| 7 Oct 2024, 10:21 | 0.25 | 0.25 mg/l |
| 10 Sep 2024, 12:26 | 0.11 | 0.11 mg/l |
| 9 Aug 2024, 12:29 | 0.15 | 0.15 mg/l |
| 31 Jul 2024, 10:02 | 0.11 | 0.11 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
36.9 mg/l
Sampled 4 Sep 2026, 27 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:40 | 36.9 | 36.9 mg/l |
| 20 Jul 2026, 08:56 | 30 | 30 mg/l |
| 25 Jun 2026, 08:58 | 21.9 | 21.9 mg/l |
| 20 May 2026, 09:00 | 22.8 | 22.8 mg/l |
| 15 Apr 2026, 13:09 | 4.49 | 4.49 mg/l |
| 4 Mar 2026, 13:21 | 5.79 | 5.79 mg/l |
| 9 Jan 2026, 14:27 | 14.9 | 14.9 mg/l |
| 17 Dec 2025, 09:11 | 17 | 17 mg/l |
| 26 Nov 2025, 09:07 | 16.7 | 16.7 mg/l |
| 23 Oct 2025, 09:37 | 19.7 | 19.7 mg/l |
| 8 Sep 2025, 13:23 | 22.9 | 22.9 mg/l |
| 6 Aug 2025, 09:03 | 22.9 | 22.9 mg/l |
| 18 Jul 2025, 12:57 | 7.68 | 7.68 mg/l |
| 25 Jun 2025, 08:45 | 32.5 | 32.5 mg/l |
| 11 Jun 2025, 11:44 | 3.28 | 3.28 mg/l |
| 27 May 2025, 11:33 | 3.08 | 3.08 mg/l |
| 31 Mar 2025, 11:46 | 23.7 | 23.7 mg/l |
| 14 Mar 2025, 09:01 | 17.8 | 17.8 mg/l |
| 25 Feb 2025, 08:51 | 8.51 | 8.51 mg/l |
| 29 Jan 2025, 13:25 | 8.59 | 8.59 mg/l |
| 17 Dec 2024, 13:34 | 14.8 | 14.8 mg/l |
| 13 Nov 2024, 09:21 | 20.4 | 20.4 mg/l |
| 7 Oct 2024, 10:21 | 10.5 | 10.5 mg/l |
| 10 Sep 2024, 12:26 | 19.5 | 19.5 mg/l |
| 9 Aug 2024, 12:29 | 24.2 | 24.2 mg/l |
| 31 Jul 2024, 10:02 | 25.4 | 25.4 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
3.1 mg/l
Sampled 4 Sep 2026, 27 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:40 | 3.1 | 3.1 mg/l |
| 20 Jul 2026, 08:56 | 2.3 | 2.3 mg/l |
| 25 Jun 2026, 08:58 | 1.1 | 1.1 mg/l |
| 20 May 2026, 09:00 | 1.5 | 1.5 mg/l |
| 15 Apr 2026, 13:09 | 0.15 | 0.15 mg/l |
| 4 Mar 2026, 13:21 | 0.13 | 0.13 mg/l |
| 9 Jan 2026, 14:27 | 0.35 | 0.35 mg/l |
| 17 Dec 2025, 09:11 | 0.42 | 0.42 mg/l |
| 26 Nov 2025, 09:07 | 0.76 | 0.76 mg/l |
| 23 Oct 2025, 09:37 | 1.8 | 1.8 mg/l |
| 8 Sep 2025, 13:23 | 1.5 | 1.5 mg/l |
| 6 Aug 2025, 09:03 | 1.7 | 1.7 mg/l |
| 18 Jul 2025, 12:57 | 0.27 | 0.27 mg/l |
| 25 Jun 2025, 08:45 | 1.8 | 1.8 mg/l |
| 11 Jun 2025, 11:44 | 0.3 | 0.3 mg/l |
| 27 May 2025, 11:33 | 0.29 | 0.29 mg/l |
| 31 Mar 2025, 11:46 | 2.5 | 2.5 mg/l |
| 14 Mar 2025, 09:01 | 1.7 | 1.7 mg/l |
| 25 Feb 2025, 08:51 | 0.68 | 0.68 mg/l |
| 29 Jan 2025, 13:25 | 0.58 | 0.58 mg/l |
| 17 Dec 2024, 13:34 | 1.3 | 1.3 mg/l |
| 13 Nov 2024, 09:21 | 2.2 | 2.2 mg/l |
| 7 Oct 2024, 10:21 | 1.4 | 1.4 mg/l |
| 10 Sep 2024, 12:26 | 2.9 | 2.9 mg/l |
| 9 Aug 2024, 12:29 | 4.1 | 4.1 mg/l |
| 31 Jul 2024, 10:02 | 4.2 | 4.2 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1062 µS/cm
Sampled 4 Sep 2026, 27 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 13:40 | 1062 | 1062 µS/cm |
| 20 Jul 2026, 08:56 | 1058 | 1058 µS/cm |
| 25 Jun 2026, 08:58 | 987 | 987 µS/cm |
| 20 May 2026, 09:00 | 1023 | 1023 µS/cm |
| 15 Apr 2026, 13:09 | 816 | 816 µS/cm |
| 4 Mar 2026, 13:21 | 814 | 814 µS/cm |
| 9 Jan 2026, 14:27 | 469 | 469 µS/cm |
| 17 Dec 2025, 09:11 | 625 | 625 µS/cm |
| 26 Nov 2025, 09:07 | 805 | 805 µS/cm |
| 23 Oct 2025, 09:37 | 912 | 912 µS/cm |
| 8 Sep 2025, 13:23 | 987 | 987 µS/cm |
| 6 Aug 2025, 09:03 | 1010 | 1010 µS/cm |
| 18 Jul 2025, 12:57 | 771 | 771 µS/cm |
| 25 Jun 2025, 08:45 | 1054 | 1054 µS/cm |
| 11 Jun 2025, 11:44 | 769 | 769 µS/cm |
| 27 May 2025, 11:33 | 768 | 768 µS/cm |
| 31 Mar 2025, 11:46 | 946 | 946 µS/cm |
| 14 Mar 2025, 09:01 | 903 | 903 µS/cm |
| 25 Feb 2025, 08:51 | 686 | 686 µS/cm |
| 29 Jan 2025, 13:25 | 656 | 656 µS/cm |
| 17 Dec 2024, 13:34 | 870 | 870 µS/cm |
| 13 Nov 2024, 09:21 | 942 | 942 µS/cm |
| 7 Oct 2024, 10:21 | 823 | 823 µS/cm |
| 10 Sep 2024, 12:26 | 889 | 889 µS/cm |
| 9 Aug 2024, 12:29 | 974 | 974 µS/cm |
| 31 Jul 2024, 10:02 | 1006 | 1006 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 | 26 | Jul 2024 – Sep 2026 | 67.5% 4 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 26 | Jul 2024 – Sep 2026 | 6.31 mg/l 4 Sep 2026 |
| Temperature of Water 0076 | River water | 26 | Jul 2024 – Sep 2026 | 18.5 °C 4 Sep 2026 |
| pH 0061 | River water | 26 | Jul 2024 – Sep 2026 | 7.44 4 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 26 | Jul 2024 – Sep 2026 | below 0.03 mg/l 4 Sep 2026 |
| Nitrate as N 0117 | River water | 26 | Jul 2024 – Sep 2026 | 36.9 mg/l 4 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 26 | Jul 2024 – Sep 2026 | 3.1 mg/l 4 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 26 | Jul 2024 – Sep 2026 | 1062 µS/cm 4 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 26 | Jul 2024 – Sep 2026 | 150 mg/l 4 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 26 | Jul 2024 – Sep 2026 | below 0.00029 mg/l 4 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 25 | Jul 2024 – Sep 2026 | 3.8 mg/l 4 Sep 2026 |
| Nitrite as N 0118 | River water | 26 | Jul 2024 – Sep 2026 | 0.063 mg/l 4 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 26 | Jul 2024 – Sep 2026 | 37 mg/l 4 Sep 2026 |
| Phosphorus, Total as P 0348 | River water | 13 | Jun 2025 – Sep 2026 | 3.3 mg/l 4 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.