Corfe Farm, Caul Bourne
EA name: CORFE FARM, CAUL BOURNE
Environment Agency sampling point SO-Y0004524 · 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
- 24 Mar 2026, 13:006 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 8 Apr 2024 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring)
- Where
- National Grid 441561, 89611As published, to the nearest 1 m. Open in a map
- River, by its own name
- Corfe Farm
- River, by the map
- Not placedIts name gives Corfe Farm; the only line close by, 5 m away, is Shalfleet Lake and is not traced into it. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Planned investigation (local monitoring) (24 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
98.7%
Sampled 24 Mar 2026, 6 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 13:00 | 98.7 | 98.7% |
| 25 Feb 2026, 12:41 | 100.7 | 100.7% |
| 22 Jan 2026, 11:57 | 101.7 | 101.7% |
| 9 Dec 2025, 11:17 | 97.3 | 97.3% |
| 11 Nov 2025, 11:58 | 96.1 | 96.1% |
| 30 Oct 2025, 13:28 | 95 | 95% |
| 24 Sep 2025, 14:45 | 107.4 | 107.4% |
| 13 Aug 2025, 10:56 | 90.5 | 90.5% |
| 2 Jul 2025, 11:21 | 93.5 | 93.5% |
| 4 Jun 2025, 11:16 | 99.7 | 99.7% |
| 9 May 2025, 10:51 | 98.9 | 98.9% |
| 1 Apr 2025, 11:04 | 104.7 | 104.7% |
| 3 Mar 2025, 11:30 | 102.1 | 102.1% |
| 4 Feb 2025, 11:05 | 100.5 | 100.5% |
| 9 Jan 2025, 12:19 | 98.6 | 98.6% |
| 6 Dec 2024, 10:19 | 98.5 | 98.5% |
| 30 Oct 2024, 10:36 | 94.4 | 94.4% |
| 30 Sep 2024, 10:53 | 96.6 | 96.6% |
| 23 Aug 2024, 09:18 | 91.8 | 91.8% |
| 26 Jul 2024, 09:44 | 93.7 | 93.7% |
| 12 Jun 2024, 12:23 | 100.7 | 100.7% |
| 30 May 2024, 10:02 | 98.4 | 98.4% |
| 8 Apr 2024, 10:25 | 98.9 | 98.9% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.9 mg/l
Sampled 24 Mar 2026, 6 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 13:00 | 10.9 | 10.9 mg/l |
| 25 Feb 2026, 12:41 | 10.9 | 10.9 mg/l |
| 22 Jan 2026, 11:57 | 11.6 | 11.6 mg/l |
| 9 Dec 2025, 11:17 | 10.6 | 10.6 mg/l |
| 11 Nov 2025, 11:58 | 10.2 | 10.2 mg/l |
| 30 Oct 2025, 13:28 | 10.5 | 10.5 mg/l |
| 24 Sep 2025, 14:45 | 11 | 11 mg/l |
| 13 Aug 2025, 10:56 | 8.55 | 8.55 mg/l |
| 2 Jul 2025, 11:21 | 8.81 | 8.81 mg/l |
| 4 Jun 2025, 11:16 | 10.3 | 10.3 mg/l |
| 9 May 2025, 10:51 | 11 | 11 mg/l |
| 1 Apr 2025, 11:04 | 11.9 | 11.9 mg/l |
| 3 Mar 2025, 11:30 | 12.5 | 12.5 mg/l |
| 4 Feb 2025, 11:05 | 11.6 | 11.6 mg/l |
| 9 Jan 2025, 12:19 | 12.3 | 12.3 mg/l |
| 6 Dec 2024, 10:19 | 11.4 | 11.4 mg/l |
| 30 Oct 2024, 10:36 | 9.92 | 9.92 mg/l |
| 30 Sep 2024, 10:53 | 9.89 | 9.89 mg/l |
| 23 Aug 2024, 09:18 | 9 | 9 mg/l |
| 26 Jul 2024, 09:44 | 9.4 | 9.4 mg/l |
| 12 Jun 2024, 12:23 | 10.9 | 10.9 mg/l |
| 30 May 2024, 10:02 | 10.5 | 10.5 mg/l |
Water temperature
code 0076 · °C
10.8 °C
Sampled 24 Mar 2026, 6 months ago · 22 results banked
Every result (22)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 13:00 | 10.8 | 10.8 °C |
| 25 Feb 2026, 12:41 | 11.6 | 11.6 °C |
| 22 Jan 2026, 11:57 | 9.4 | 9.4 °C |
| 9 Dec 2025, 11:17 | 11.4 | 11.4 °C |
| 11 Nov 2025, 11:58 | 12.5 | 12.5 °C |
| 30 Oct 2025, 13:28 | 11 | 11 °C |
| 24 Sep 2025, 14:45 | 14.2 | 14.2 °C |
| 13 Aug 2025, 10:56 | 18 | 18 °C |
| 2 Jul 2025, 11:21 | 18.1 | 18.1 °C |
| 4 Jun 2025, 11:16 | 13.6 | 13.6 °C |
| 9 May 2025, 10:51 | 10.7 | 10.7 °C |
| 1 Apr 2025, 11:04 | 9.6 | 9.6 °C |
| 3 Mar 2025, 11:30 | 6.7 | 6.7 °C |
| 4 Feb 2025, 11:05 | 8.9 | 8.9 °C |
| 9 Jan 2025, 12:19 | 6 | 6 °C |
| 6 Dec 2024, 10:19 | 8.9 | 8.9 °C |
| 30 Oct 2024, 10:36 | 13 | 13 °C |
| 30 Sep 2024, 10:53 | 14.2 | 14.2 °C |
| 23 Aug 2024, 09:18 | 16.2 | 16.2 °C |
| 26 Jul 2024, 09:44 | 15.1 | 15.1 °C |
| 12 Jun 2024, 12:23 | 11.8 | 11.8 °C |
| 30 May 2024, 10:02 | 12.3 | 12.3 °C |
pH
code 0061
8.3
Sampled 24 Mar 2026, 6 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 13:00 | 8.3 | 8.3 |
| 25 Feb 2026, 12:41 | 8.41 | 8.41 |
| 22 Jan 2026, 11:57 | 8.15 | 8.15 |
| 9 Dec 2025, 11:17 | 7.97 | 7.97 |
| 11 Nov 2025, 11:58 | 8.03 | 8.03 |
| 30 Oct 2025, 13:28 | 8.3 | 8.3 |
| 24 Sep 2025, 14:45 | 8.12 | 8.12 |
| 13 Aug 2025, 10:56 | 8.21 | 8.21 |
| 2 Jul 2025, 11:21 | 8.42 | 8.42 |
| 4 Jun 2025, 11:16 | 8.22 | 8.22 |
| 9 May 2025, 10:51 | 8.45 | 8.45 |
| 1 Apr 2025, 11:04 | 8.48 | 8.48 |
| 3 Mar 2025, 11:30 | 8.38 | 8.38 |
| 4 Feb 2025, 11:05 | 8.25 | 8.25 |
| 9 Jan 2025, 12:19 | 8.12 | 8.12 |
| 6 Dec 2024, 10:19 | 8.12 | 8.12 |
| 30 Oct 2024, 10:36 | 8.11 | 8.11 |
| 30 Sep 2024, 10:53 | 8.05 | 8.05 |
| 23 Aug 2024, 09:18 | 8.27 | 8.27 |
| 26 Jul 2024, 09:44 | 8.26 | 8.26 |
| 12 Jun 2024, 12:23 | 8.52 | 8.52 |
| 30 May 2024, 10:02 | 8.55 | 8.55 |
| 8 Apr 2024, 10:25 | 7.85 | 7.85 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 24 Mar 2026, 6 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 13:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Feb 2026, 12:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jan 2026, 11:57 | 0.058 | 0.058 mg/l |
| 9 Dec 2025, 11:17 | 0.049 | 0.049 mg/l |
| 11 Nov 2025, 11:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Oct 2025, 13:28 | 1.4 | 1.4 mg/l |
| 24 Sep 2025, 14:45 | 0.36 | 0.36 mg/l |
| 13 Aug 2025, 10:56 | 0.067 | 0.067 mg/l |
| 2 Jul 2025, 11:21 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Jun 2025, 11:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 May 2025, 10:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Apr 2025, 11:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Mar 2025, 11:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2025, 11:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Jan 2025, 12:19 | 0.042 | 0.042 mg/l |
| 6 Dec 2024, 10:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Nov 2024, 12:42 | 0.1 | 0.1 mg/l |
| 30 Oct 2024, 10:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Sep 2024, 10:53 | 0.051 | 0.051 mg/l |
| 23 Aug 2024, 09:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Jul 2024, 09:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Jun 2024, 12:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 May 2024, 10:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Apr 2024, 10:25 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.79 mg/l
Sampled 24 Mar 2026, 6 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 13:00 | 5.79 | 5.79 mg/l |
| 25 Feb 2026, 12:41 | 5.6 | 5.6 mg/l |
| 22 Jan 2026, 11:57 | 3.69 | 3.69 mg/l |
| 9 Dec 2025, 11:17 | 2.09 | 2.09 mg/l |
| 11 Nov 2025, 11:58 | 4.19 | 4.19 mg/l |
| 30 Oct 2025, 13:28 | 4.49 | 4.49 mg/l |
| 24 Sep 2025, 14:45 | 0.203 | 0.203 mg/l |
| 13 Aug 2025, 10:56 | 4.28 | 4.28 mg/l |
| 2 Jul 2025, 11:21 | 4.19 | 4.19 mg/l |
| 4 Jun 2025, 11:16 | 4.59 | 4.59 mg/l |
| 9 May 2025, 10:51 | 5.09 | 5.09 mg/l |
| 1 Apr 2025, 11:04 | 5.39 | 5.39 mg/l |
| 3 Mar 2025, 11:30 | 5.29 | 5.29 mg/l |
| 4 Feb 2025, 11:05 | 4.99 | 4.99 mg/l |
| 9 Jan 2025, 12:19 | 3.79 | 3.79 mg/l |
| 6 Dec 2024, 10:19 | 0.716 | 0.716 mg/l |
| 25 Nov 2024, 12:42 | 3.27 | 3.27 mg/l |
| 30 Oct 2024, 10:36 | 3.88 | 3.88 mg/l |
| 30 Sep 2024, 10:53 | 4.38 | 4.38 mg/l |
| 23 Aug 2024, 09:18 | 4.19 | 4.19 mg/l |
| 26 Jul 2024, 09:44 | 4.29 | 4.29 mg/l |
| 12 Jun 2024, 12:23 | 5.59 | 5.59 mg/l |
| 30 May 2024, 10:02 | 5.59 | 5.59 mg/l |
| 8 Apr 2024, 10:25 | 5.49 | 5.49 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.034 mg/l
Sampled 24 Mar 2026, 6 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 13:00 | 0.034 | 0.034 mg/l |
| 25 Feb 2026, 12:41 | 0.045 | 0.045 mg/l |
| 22 Jan 2026, 11:57 | 0.078 | 0.078 mg/l |
| 9 Dec 2025, 11:17 | 0.15 | 0.15 mg/l |
| 11 Nov 2025, 11:58 | 0.088 | 0.088 mg/l |
| 30 Oct 2025, 13:28 | 0.19 | 0.19 mg/l |
| 24 Sep 2025, 14:45 | 0.034 | 0.034 mg/l |
| 13 Aug 2025, 10:56 | 0.068 | 0.068 mg/l |
| 2 Jul 2025, 11:21 | 0.077 | 0.077 mg/l |
| 4 Jun 2025, 11:16 | 0.064 | 0.064 mg/l |
| 9 May 2025, 10:51 | 0.045 | 0.045 mg/l |
| 1 Apr 2025, 11:04 | 0.021 | 0.021 mg/l |
| 3 Mar 2025, 11:30 | 0.041 | 0.041 mg/l |
| 4 Feb 2025, 11:05 | 0.046 | 0.046 mg/l |
| 9 Jan 2025, 12:19 | 0.087 | 0.087 mg/l |
| 6 Dec 2024, 10:19 | 0.011 | 0.011 mg/l |
| 25 Nov 2024, 12:42 | 0.19 | 0.19 mg/l |
| 30 Oct 2024, 10:36 | 0.14 | 0.14 mg/l |
| 30 Sep 2024, 10:53 | 0.25 | 0.25 mg/l |
| 23 Aug 2024, 09:18 | 0.25 | 0.25 mg/l |
| 26 Jul 2024, 09:44 | 0.19 | 0.19 mg/l |
| 12 Jun 2024, 12:23 | 0.11 | 0.11 mg/l |
| 30 May 2024, 10:02 | 0.091 | 0.091 mg/l |
| 8 Apr 2024, 10:25 | 0.057 | 0.057 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
604 µS/cm
Sampled 24 Mar 2026, 6 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Mar 2026, 13:00 | 604 | 604 µS/cm |
| 25 Feb 2026, 12:41 | 610 | 610 µS/cm |
| 22 Jan 2026, 11:57 | 570 | 570 µS/cm |
| 9 Dec 2025, 11:17 | 427 | 427 µS/cm |
| 11 Nov 2025, 11:58 | 732 | 732 µS/cm |
| 30 Oct 2025, 13:28 | 1962 | 1962 µS/cm |
| 24 Sep 2025, 14:45 | 46182 | 46182 µS/cm |
| 13 Aug 2025, 10:56 | 2745 | 2745 µS/cm |
| 2 Jul 2025, 11:21 | 1886 | 1886 µS/cm |
| 4 Jun 2025, 11:16 | 3772 | 3772 µS/cm |
| 9 May 2025, 10:51 | 1237 | 1237 µS/cm |
| 1 Apr 2025, 11:04 | 1179 | 1179 µS/cm |
| 3 Mar 2025, 11:30 | 706 | 706 µS/cm |
| 4 Feb 2025, 11:05 | 621 | 621 µS/cm |
| 9 Jan 2025, 12:19 | 546 | 546 µS/cm |
| 6 Dec 2024, 10:19 | 559 | 559 µS/cm |
| 30 Oct 2024, 10:36 | 2172 | 2172 µS/cm |
| 30 Sep 2024, 10:53 | 1037 | 1037 µS/cm |
| 23 Aug 2024, 09:18 | 2683 | 2683 µS/cm |
| 26 Jul 2024, 09:44 | 2113 | 2113 µS/cm |
| 12 Jun 2024, 12:23 | 666 | 666 µS/cm |
| 30 May 2024, 10:02 | 723 | 723 µS/cm |
| 8 Apr 2024, 10:25 | 46281 | 46281 µS/cm |
Everything measured here
19 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 19 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 23 | Apr 2024 – Mar 2026 | 98.7% 24 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 22 | May 2024 – Mar 2026 | 10.9 mg/l 24 Mar 2026 |
| Temperature of Water 0076 | River water | 22 | May 2024 – Mar 2026 | 10.8 °C 24 Mar 2026 |
| pH 0061 | River water | 23 | Apr 2024 – Mar 2026 | 8.3 24 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 24 | Apr 2024 – Mar 2026 | below 0.03 mg/l 24 Mar 2026 |
| Nitrate as N 0117 | River water | 24 | Apr 2024 – Mar 2026 | 5.79 mg/l 24 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Apr 2024 – Mar 2026 | 0.034 mg/l 24 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 23 | Apr 2024 – Mar 2026 | 604 µS/cm 24 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 19 | Sep 2024 – Mar 2026 | 200 mg/l 24 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 22 | May 2024 – Mar 2026 | below 0.00058 mg/l 24 Mar 2026 |
| BOD : 5 Day ATU 0085 | River water | 23 | Apr 2024 – Mar 2026 | 1.1 mg/l 24 Mar 2026 |
| Nitrite as N 0118 | River water | 24 | Apr 2024 – Mar 2026 | 0.0065 mg/l 24 Mar 2026 |
| Nitrogen, Kjeldahl as N 0114 | River water | 24 | Apr 2024 – Mar 2026 | 0.3 mg/l 24 Mar 2026 |
| Nitrogen, Organic as N 0113 | River water | 24 | Apr 2024 – Mar 2026 | 0.27 mg/l 24 Mar 2026 |
| Nitrogen, Total as N 9686 | River water | 24 | Apr 2024 – Mar 2026 | 6.1 mg/l 24 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Apr 2024 – Mar 2026 | 5.8 mg/l 24 Mar 2026 |
| Phosphate :- {TIP} 0192 | River water | 23 | Apr 2024 – Mar 2026 | 0.025 mg/l 24 Mar 2026 |
| Phosphorus, Total as P 0348 | River water | 24 | Apr 2024 – Mar 2026 | 0.032 mg/l 24 Mar 2026 |
| Solids, Suspended at 105 C 0135 | River water | 23 | Apr 2024 – Mar 2026 | 5.2 mg/l 24 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.