River Colne Oaker Bridge
EA name: R.COLNE OAKER BRIDGE
Environment Agency sampling point AN-CL0892 · 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
- 5 May 2026, 12:295 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 574500, 239700As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Colne
- River, by the map
- River ColnePlaced on the river its name gives, 12 m from the line.
- Next gauge downstream
- Poole Street On the River Colne · 5.7 km along the riverBeside Great Yeldham: too close to say above or below.
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
1 visit found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
52.5%
Sampled 5 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:29 | 52.5 | 52.5% |
| 13 Apr 2026, 13:37 | 106.7 | 106.7% |
| 9 Mar 2026, 14:07 | 105.9 | 105.9% |
| 9 Feb 2026, 13:05 | 97.5 | 97.5% |
| 9 Dec 2025, 12:54 | 88.6 | 88.6% |
| 7 Nov 2025, 10:56 | 51.4 | 51.4% |
| 8 Oct 2025, 11:09 | 49.9 | 49.9% |
| 2 Sep 2025, 10:04 | 39.7 | 39.7% |
| 4 Aug 2025, 12:46 | 40.2 | 40.2% |
| 10 Jul 2025, 09:59 | 30 | 30% |
| 17 Jun 2025, 13:36 | 42.1 | 42.1% |
| 29 May 2025, 12:06 | 41.7 | 41.7% |
| 1 Apr 2025, 09:51 | 85.5 | 85.5% |
| 7 Mar 2025, 09:20 | 95.7 | 95.7% |
| 13 Feb 2025, 11:52 | 97.3 | 97.3% |
| 30 Jan 2025, 12:24 | 91.6 | 91.6% |
| 2 Dec 2024, 12:22 | 88 | 88% |
| 18 Nov 2024, 11:39 | 73.8 | 73.8% |
| 15 Oct 2024, 10:14 | 75.5 | 75.5% |
| 30 Sep 2024, 10:27 | 84.5 | 84.5% |
| 29 Aug 2024, 09:41 | 63.7 | 63.7% |
| 15 Jul 2024, 06:48 | 69.6 | 69.6% |
| 21 Jun 2024, 15:33 | 62.6 | 62.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
5.56 mg/l
Sampled 5 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:29 | 5.56 | 5.56 mg/l |
| 13 Apr 2026, 13:37 | 12.2 | 12.2 mg/l |
| 9 Mar 2026, 14:07 | 12.2 | 12.2 mg/l |
| 9 Feb 2026, 13:05 | 11.7 | 11.7 mg/l |
| 9 Dec 2025, 12:54 | 9.93 | 9.93 mg/l |
| 7 Nov 2025, 10:56 | 5.44 | 5.44 mg/l |
| 8 Oct 2025, 11:09 | 5.27 | 5.27 mg/l |
| 2 Sep 2025, 10:04 | 3.98 | 3.98 mg/l |
| 4 Aug 2025, 12:46 | 3.88 | 3.88 mg/l |
| 10 Jul 2025, 09:59 | 2.85 | 2.85 mg/l |
| 17 Jun 2025, 13:36 | 4.08 | 4.08 mg/l |
| 29 May 2025, 12:06 | 4.2 | 4.2 mg/l |
| 1 Apr 2025, 09:51 | 10.3 | 10.3 mg/l |
| 7 Mar 2025, 09:20 | 11.7 | 11.7 mg/l |
| 13 Feb 2025, 11:52 | 12.5 | 12.5 mg/l |
| 30 Jan 2025, 12:24 | 11.7 | 11.7 mg/l |
| 2 Dec 2024, 12:22 | 10.1 | 10.1 mg/l |
| 18 Nov 2024, 11:39 | 8.95 | 8.95 mg/l |
| 15 Oct 2024, 10:14 | 8.37 | 8.37 mg/l |
| 30 Sep 2024, 10:27 | 8.9 | 8.9 mg/l |
| 29 Aug 2024, 09:41 | 6.26 | 6.26 mg/l |
| 15 Jul 2024, 06:48 | 7.37 | 7.37 mg/l |
| 21 Jun 2024, 15:33 | 6.18 | 6.18 mg/l |
Water temperature
code 0076 · °C
12.7 °C
Sampled 5 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:29 | 12.7 | 12.7 °C |
| 13 Apr 2026, 13:37 | 9.3 | 9.3 °C |
| 9 Mar 2026, 14:07 | 9.2 | 9.2 °C |
| 9 Feb 2026, 13:05 | 7.5 | 7.5 °C |
| 9 Dec 2025, 12:54 | 10.2 | 10.2 °C |
| 7 Nov 2025, 10:56 | 12.7 | 12.7 °C |
| 8 Oct 2025, 11:09 | 12.8 | 12.8 °C |
| 2 Sep 2025, 10:04 | 15.2 | 15.2 °C |
| 4 Aug 2025, 12:46 | 16.9 | 16.9 °C |
| 10 Jul 2025, 09:59 | 17.7 | 17.7 °C |
| 17 Jun 2025, 13:36 | 16.8 | 16.8 °C |
| 29 May 2025, 12:06 | 14.9 | 14.9 °C |
| 1 Apr 2025, 09:51 | 7.3 | 7.3 °C |
| 7 Mar 2025, 09:20 | 6.7 | 6.7 °C |
| 13 Feb 2025, 11:52 | 4.7 | 4.7 °C |
| 30 Jan 2025, 12:24 | 5 | 5 °C |
| 2 Dec 2024, 12:22 | 9.1 | 9.1 °C |
| 18 Nov 2024, 11:39 | 7 | 7 °C |
| 15 Oct 2024, 10:14 | 10.7 | 10.7 °C |
| 30 Sep 2024, 10:27 | 12.9 | 12.9 °C |
| 29 Aug 2024, 09:41 | 16.1 | 16.1 °C |
| 15 Jul 2024, 06:48 | 12.7 | 12.7 °C |
| 21 Jun 2024, 15:33 | 15.9 | 15.9 °C |
pH
code 0061
7.51
Sampled 5 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:29 | 7.51 | 7.51 |
| 13 Apr 2026, 13:37 | 8.09 | 8.09 |
| 9 Mar 2026, 14:07 | 8.21 | 8.21 |
| 9 Feb 2026, 13:05 | 8.15 | 8.15 |
| 9 Dec 2025, 12:54 | 7.88 | 7.88 |
| 7 Nov 2025, 10:56 | 7.48 | 7.48 |
| 8 Oct 2025, 11:09 | 7.62 | 7.62 |
| 2 Sep 2025, 10:04 | 7.49 | 7.49 |
| 4 Aug 2025, 12:46 | 7.54 | 7.54 |
| 10 Jul 2025, 09:59 | 7.58 | 7.58 |
| 17 Jun 2025, 13:36 | 7.51 | 7.51 |
| 29 May 2025, 12:06 | 7.53 | 7.53 |
| 1 Apr 2025, 09:51 | 8.11 | 8.11 |
| 7 Mar 2025, 09:20 | 8.23 | 8.23 |
| 13 Feb 2025, 11:52 | 8.11 | 8.11 |
| 30 Jan 2025, 12:24 | 8.21 | 8.21 |
| 2 Dec 2024, 12:22 | 7.94 | 7.94 |
| 18 Nov 2024, 11:39 | 7.79 | 7.79 |
| 15 Oct 2024, 10:14 | 7.83 | 7.83 |
| 30 Sep 2024, 10:27 | 7.57 | 7.57 |
| 29 Aug 2024, 09:41 | 7.78 | 7.78 |
| 15 Jul 2024, 06:48 | 7.92 | 7.92 |
| 21 Jun 2024, 15:33 | 7.74 | 7.74 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.074 mg/l
Sampled 5 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:29 | 0.074 | 0.074 mg/l |
| 13 Apr 2026, 13:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Mar 2026, 14:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Feb 2026, 13:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Dec 2025, 12:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Nov 2025, 10:56 | 0.033 | 0.033 mg/l |
| 8 Oct 2025, 11:09 | 0.11 | 0.11 mg/l |
| 2 Sep 2025, 10:04 | 0.46 | 0.46 mg/l |
| 4 Aug 2025, 12:46 | 0.56 | 0.56 mg/l |
| 10 Jul 2025, 09:59 | 0.63 | 0.63 mg/l |
| 17 Jun 2025, 13:36 | 0.53 | 0.53 mg/l |
| 29 May 2025, 12:06 | 0.23 | 0.23 mg/l |
| 1 Apr 2025, 09:51 | 0.055 | 0.055 mg/l |
| 7 Mar 2025, 09:20 | 0.049 | 0.049 mg/l |
| 13 Feb 2025, 11:52 | <0.03 | below 0.03 mg/l (not detected above this) |
| 30 Jan 2025, 12:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Dec 2024, 12:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Nov 2024, 11:39 | 0.042 | 0.042 mg/l |
| 15 Oct 2024, 10:14 | 0.032 | 0.032 mg/l |
| 30 Sep 2024, 10:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Aug 2024, 09:41 | 0.2 | 0.2 mg/l |
| 15 Jul 2024, 06:48 | 0.084 | 0.084 mg/l |
| 21 Jun 2024, 15:33 | 0.27 | 0.27 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
below 0.196 mg/l (not detected above this)
Sampled 5 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:29 | <0.196 | below 0.196 mg/l (not detected above this) |
| 13 Apr 2026, 13:37 | 3.88 | 3.88 mg/l |
| 9 Mar 2026, 14:07 | 7.99 | 7.99 mg/l |
| 9 Feb 2026, 13:05 | 15 | 15 mg/l |
| 9 Dec 2025, 12:54 | 28 | 28 mg/l |
| 7 Nov 2025, 10:56 | 0.195 | 0.195 mg/l |
| 8 Oct 2025, 11:09 | <0.196 | below 0.196 mg/l (not detected above this) |
| 2 Sep 2025, 10:04 | 0.257 | 0.257 mg/l |
| 4 Aug 2025, 12:46 | 0.226 | 0.226 mg/l |
| 10 Jul 2025, 09:59 | <0.196 | below 0.196 mg/l (not detected above this) |
| 17 Jun 2025, 13:36 | 0.27 | 0.27 mg/l |
| 29 May 2025, 12:06 | 0.333 | 0.333 mg/l |
| 1 Apr 2025, 09:51 | 6.06 | 6.06 mg/l |
| 7 Mar 2025, 09:20 | 11 | 11 mg/l |
| 13 Feb 2025, 11:52 | 15 | 15 mg/l |
| 30 Jan 2025, 12:24 | 15 | 15 mg/l |
| 2 Dec 2024, 12:22 | 13 | 13 mg/l |
| 18 Nov 2024, 11:39 | 2.08 | 2.08 mg/l |
| 15 Oct 2024, 10:14 | 4.48 | 4.48 mg/l |
| 30 Sep 2024, 10:27 | 3.27 | 3.27 mg/l |
| 29 Aug 2024, 09:41 | 0.335 | 0.335 mg/l |
| 15 Jul 2024, 06:48 | 7.54 | 7.54 mg/l |
| 21 Jun 2024, 15:33 | 1.05 | 1.05 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.073 mg/l
Sampled 5 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:29 | 0.073 | 0.073 mg/l |
| 13 Apr 2026, 13:37 | 0.15 | 0.15 mg/l |
| 9 Mar 2026, 14:07 | 0.044 | 0.044 mg/l |
| 9 Feb 2026, 13:05 | 0.028 | 0.028 mg/l |
| 9 Dec 2025, 12:54 | 0.044 | 0.044 mg/l |
| 7 Nov 2025, 10:56 | 0.37 | 0.37 mg/l |
| 8 Oct 2025, 11:09 | 0.27 | 0.27 mg/l |
| 2 Sep 2025, 10:04 | 0.17 | 0.17 mg/l |
| 4 Aug 2025, 12:46 | 0.21 | 0.21 mg/l |
| 10 Jul 2025, 09:59 | 0.46 | 0.46 mg/l |
| 17 Jun 2025, 13:36 | 0.32 | 0.32 mg/l |
| 29 May 2025, 12:06 | 0.17 | 0.17 mg/l |
| 1 Apr 2025, 09:51 | 0.072 | 0.072 mg/l |
| 7 Mar 2025, 09:20 | 0.021 | 0.021 mg/l |
| 13 Feb 2025, 11:52 | 0.024 | 0.024 mg/l |
| 30 Jan 2025, 12:24 | 0.022 | 0.022 mg/l |
| 2 Dec 2024, 12:22 | 0.025 | 0.025 mg/l |
| 18 Nov 2024, 11:39 | 0.16 | 0.16 mg/l |
| 15 Oct 2024, 10:14 | 0.087 | 0.087 mg/l |
| 30 Sep 2024, 10:27 | 0.069 | 0.069 mg/l |
| 29 Aug 2024, 09:41 | 0.24 | 0.24 mg/l |
| 15 Jul 2024, 06:48 | 0.13 | 0.13 mg/l |
| 21 Jun 2024, 15:33 | 0.15 | 0.15 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
895 µS/cm
Sampled 5 May 2026, 5 months ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 5 May 2026, 12:29 | 895 | 895 µS/cm |
| 13 Apr 2026, 13:37 | 828 | 828 µS/cm |
| 9 Mar 2026, 14:07 | 749 | 749 µS/cm |
| 9 Feb 2026, 13:05 | 705 | 705 µS/cm |
| 9 Dec 2025, 12:54 | 779 | 779 µS/cm |
| 7 Nov 2025, 10:56 | 794 | 794 µS/cm |
| 8 Oct 2025, 11:09 | 782 | 782 µS/cm |
| 2 Sep 2025, 10:04 | 759 | 759 µS/cm |
| 4 Aug 2025, 12:46 | 717 | 717 µS/cm |
| 10 Jul 2025, 09:59 | 804 | 804 µS/cm |
| 17 Jun 2025, 13:36 | 846 | 846 µS/cm |
| 29 May 2025, 12:06 | 826 | 826 µS/cm |
| 1 Apr 2025, 09:51 | 871 | 871 µS/cm |
| 7 Mar 2025, 09:20 | 809 | 809 µS/cm |
| 13 Feb 2025, 11:52 | 796 | 796 µS/cm |
| 30 Jan 2025, 12:24 | 727 | 727 µS/cm |
| 2 Dec 2024, 12:22 | 782 | 782 µS/cm |
| 18 Nov 2024, 11:39 | 817 | 817 µS/cm |
| 15 Oct 2024, 10:14 | 782 | 782 µS/cm |
| 30 Sep 2024, 10:27 | 362 | 362 µS/cm |
| 29 Aug 2024, 09:41 | 1054 | 1054 µS/cm |
| 15 Jul 2024, 06:48 | 838 | 838 µS/cm |
| 21 Jun 2024, 15:33 | 871 | 871 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 | 23 | Jun 2024 – May 2026 | 52.5% 5 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 23 | Jun 2024 – May 2026 | 5.56 mg/l 5 May 2026 |
| Temperature of Water 0076 | River water | 23 | Jun 2024 – May 2026 | 12.7 °C 5 May 2026 |
| pH 0061 | River water | 23 | Jun 2024 – May 2026 | 7.51 5 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 23 | Jun 2024 – May 2026 | 0.074 mg/l 5 May 2026 |
| Nitrate as N 0117 | River water | 23 | Jun 2024 – May 2026 | below 0.196 mg/l 5 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 23 | Jun 2024 – May 2026 | 0.073 mg/l 5 May 2026 |
| Conductivity at 25 C 0077 | River water | 23 | Jun 2024 – May 2026 | 895 µS/cm 5 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 23 | Jun 2024 – May 2026 | 300 mg/l 5 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 23 | Jun 2024 – May 2026 | 0.00054 mg/l 5 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 22 | Jun 2024 – May 2026 | 1.1 mg/l 5 May 2026 |
| Nitrite as N 0118 | River water | 23 | Jun 2024 – May 2026 | below 0.004 mg/l 5 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 23 | Jun 2024 – May 2026 | below 0.2 mg/l 5 May 2026 |
| No flow /No sample 7668 | River water | 1 | Jan 2026 – Jan 2026 | No flow/discharge at sampling point 5 Jan 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.