Horton Brook above Colne Brook
EA name: HORTON BROOK ABOVE COLNE BROOK
Environment Agency sampling point TH-PCNR0063 · 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
- 21 Sep 2026, 12:0310 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 28 since 14 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) · results completed 23 Sep 2026
- Where
- National Grid 501847, 172413As published, to the nearest 1 m. Open in a map
- River, by its own name
- Horton Brook
- River, by the map
- Not placedTwo watercourses within reach (4 m and 23 m) and no name to choose by. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Environmental monitoring statutory (EU directives) (28 samples)
Results here were completed a median of 3 days after the sample was taken (2 to 10 days, 13 samples). 1 visit found no water to sample (recorded as “No flow”).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
85.7%
Sampled 10 Aug 2026, 52 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Aug 2026, 10:10 | 85.7 | 85.7% |
| 20 Jul 2026, 12:02 | 95.5 | 95.5% |
| 17 Jun 2026, 10:50 | 83.9 | 83.9% |
| 1 May 2026, 10:22 | 87.2 | 87.2% |
| 1 Apr 2026, 10:26 | 95.7 | 95.7% |
| 2 Mar 2026, 13:15 | 121.7 | 121.7% |
| 2 Feb 2026, 11:21 | 97.7 | 97.7% |
| 5 Jan 2026, 11:38 | 90.1 | 90.1% |
| 1 Dec 2025, 11:29 | 80.6 | 80.6% |
| 7 Nov 2025, 09:51 | 69.3 | 69.3% |
| 14 Oct 2025, 13:57 | 66.8 | 66.8% |
| 22 Sep 2025, 11:38 | 76.6 | 76.6% |
| 5 Aug 2025, 10:10 | 77.9 | 77.9% |
| 3 Jul 2025, 09:14 | 68.4 | 68.4% |
| 19 Jun 2025, 09:04 | 72.9 | 72.9% |
| 7 May 2025, 10:43 | 97.1 | 97.1% |
| 3 Apr 2025, 11:28 | 96.3 | 96.3% |
| 11 Mar 2025, 11:12 | 104.1 | 104.1% |
| 4 Feb 2025, 13:57 | 89.7 | 89.7% |
| 21 Jan 2025, 09:38 | 85.4 | 85.4% |
| 9 Dec 2024, 13:34 | 83.5 | 83.5% |
| 15 Nov 2024, 11:42 | 57.2 | 57.2% |
| 2 Oct 2024, 11:41 | 64.5 | 64.5% |
| 3 Sep 2024, 12:06 | 66.3 | 66.3% |
| 1 Aug 2024, 12:20 | 98.2 | 98.2% |
| 15 Jul 2024, 11:57 | 78.5 | 78.5% |
| 14 Jun 2024, 09:32 | 86.5 | 86.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.03 mg/l
Sampled 10 Aug 2026, 52 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Aug 2026, 10:10 | 8.03 | 8.03 mg/l |
| 20 Jul 2026, 12:02 | 8.96 | 8.96 mg/l |
| 17 Jun 2026, 10:50 | 7.76 | 7.76 mg/l |
| 1 May 2026, 10:22 | 8.89 | 8.89 mg/l |
| 1 Apr 2026, 10:26 | 10.6 | 10.6 mg/l |
| 2 Mar 2026, 13:15 | 13.7 | 13.7 mg/l |
| 2 Feb 2026, 11:21 | 11.3 | 11.3 mg/l |
| 5 Jan 2026, 11:38 | 12.2 | 12.2 mg/l |
| 1 Dec 2025, 11:29 | 9.6 | 9.6 mg/l |
| 7 Nov 2025, 09:51 | 7.37 | 7.37 mg/l |
| 14 Oct 2025, 13:57 | 6.94 | 6.94 mg/l |
| 22 Sep 2025, 11:38 | 7.81 | 7.81 mg/l |
| 5 Aug 2025, 10:10 | 7.25 | 7.25 mg/l |
| 3 Jul 2025, 09:14 | 6.14 | 6.14 mg/l |
| 19 Jun 2025, 09:04 | 6.41 | 6.41 mg/l |
| 7 May 2025, 10:43 | 10.5 | 10.5 mg/l |
| 3 Apr 2025, 11:28 | 10.4 | 10.4 mg/l |
| 11 Mar 2025, 11:12 | 11.7 | 11.7 mg/l |
| 4 Feb 2025, 13:57 | 11.2 | 11.2 mg/l |
| 21 Jan 2025, 09:38 | 10.9 | 10.9 mg/l |
| 9 Dec 2024, 13:34 | 10 | 10 mg/l |
| 15 Nov 2024, 11:42 | 6.34 | 6.34 mg/l |
| 2 Oct 2024, 11:41 | 6.52 | 6.52 mg/l |
| 3 Sep 2024, 12:06 | 6.04 | 6.04 mg/l |
| 1 Aug 2024, 12:20 | 8.75 | 8.75 mg/l |
| 15 Jul 2024, 11:57 | 7.23 | 7.23 mg/l |
| 14 Jun 2024, 09:32 | 8.48 | 8.48 mg/l |
Water temperature
code 0076 · °C
18.4 °C
Sampled 10 Aug 2026, 52 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Aug 2026, 10:10 | 18.4 | 18.4 °C |
| 20 Jul 2026, 12:02 | 18.3 | 18.3 °C |
| 17 Jun 2026, 10:50 | 19 | 19 °C |
| 1 May 2026, 10:22 | 14.4 | 14.4 °C |
| 1 Apr 2026, 10:26 | 10.6 | 10.6 °C |
| 2 Mar 2026, 13:15 | 10.1 | 10.1 °C |
| 2 Feb 2026, 11:21 | 8.8 | 8.8 °C |
| 5 Jan 2026, 11:38 | 2.7 | 2.7 °C |
| 1 Dec 2025, 11:29 | 7.7 | 7.7 °C |
| 7 Nov 2025, 09:51 | 12.5 | 12.5 °C |
| 14 Oct 2025, 13:57 | 13.5 | 13.5 °C |
| 22 Sep 2025, 11:38 | 14.4 | 14.4 °C |
| 5 Aug 2025, 10:10 | 18.7 | 18.7 °C |
| 3 Jul 2025, 09:14 | 20.5 | 20.5 °C |
| 19 Jun 2025, 09:04 | 21.6 | 21.6 °C |
| 7 May 2025, 10:43 | 11.8 | 11.8 °C |
| 3 Apr 2025, 11:28 | 12 | 12 °C |
| 11 Mar 2025, 11:12 | 10 | 10 °C |
| 4 Feb 2025, 13:57 | 5.7 | 5.7 °C |
| 21 Jan 2025, 09:38 | 5 | 5 °C |
| 9 Dec 2024, 13:34 | 7.5 | 7.5 °C |
| 15 Nov 2024, 11:42 | 10.7 | 10.7 °C |
| 2 Oct 2024, 11:41 | 14.8 | 14.8 °C |
| 3 Sep 2024, 12:06 | 19.8 | 19.8 °C |
| 1 Aug 2024, 12:20 | 20.9 | 20.9 °C |
| 15 Jul 2024, 11:57 | 19.2 | 19.2 °C |
| 14 Jun 2024, 09:32 | 16.2 | 16.2 °C |
pH
code 0061
8.08
Sampled 10 Aug 2026, 52 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Aug 2026, 10:10 | 8.08 | 8.08 |
| 20 Jul 2026, 12:02 | 8.08 | 8.08 |
| 17 Jun 2026, 10:50 | 8.21 | 8.21 |
| 1 May 2026, 10:22 | 7.96 | 7.96 |
| 1 Apr 2026, 10:26 | 8.39 | 8.39 |
| 2 Mar 2026, 13:15 | 8.74 | 8.74 |
| 2 Feb 2026, 11:21 | 8.22 | 8.22 |
| 5 Jan 2026, 11:38 | 8.15 | 8.15 |
| 1 Dec 2025, 11:29 | 7.84 | 7.84 |
| 7 Nov 2025, 09:51 | 7.81 | 7.81 |
| 14 Oct 2025, 13:57 | 7.74 | 7.74 |
| 22 Sep 2025, 11:38 | 7.93 | 7.93 |
| 5 Aug 2025, 10:10 | 8 | 8 |
| 3 Jul 2025, 09:14 | 7.88 | 7.88 |
| 19 Jun 2025, 09:04 | 7.94 | 7.94 |
| 7 May 2025, 10:43 | 8.21 | 8.21 |
| 11 Mar 2025, 11:12 | 8.27 | 8.27 |
| 4 Feb 2025, 13:57 | 8.08 | 8.08 |
| 21 Jan 2025, 09:38 | 7.94 | 7.94 |
| 9 Dec 2024, 13:34 | 7.96 | 7.96 |
| 15 Nov 2024, 11:42 | 7.79 | 7.79 |
| 2 Oct 2024, 11:41 | 7.81 | 7.81 |
| 3 Sep 2024, 12:06 | 7.59 | 7.59 |
| 1 Aug 2024, 12:20 | 8.14 | 8.14 |
| 15 Jul 2024, 11:57 | 7.7 | 7.7 |
| 14 Jun 2024, 09:32 | 8.19 | 8.19 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 10 Aug 2026, 52 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Aug 2026, 10:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jul 2026, 12:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jun 2026, 10:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 May 2026, 10:22 | 0.12 | 0.12 mg/l |
| 1 Apr 2026, 10:26 | 0.097 | 0.097 mg/l |
| 2 Mar 2026, 13:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Feb 2026, 11:21 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Jan 2026, 11:38 | 0.036 | 0.036 mg/l |
| 1 Dec 2025, 11:29 | 0.062 | 0.062 mg/l |
| 7 Nov 2025, 09:51 | 0.034 | 0.034 mg/l |
| 14 Oct 2025, 13:57 | 0.039 | 0.039 mg/l |
| 22 Sep 2025, 11:38 | 0.043 | 0.043 mg/l |
| 5 Aug 2025, 10:10 | 0.036 | 0.036 mg/l |
| 3 Jul 2025, 09:14 | 0.035 | 0.035 mg/l |
| 19 Jun 2025, 09:04 | 0.033 | 0.033 mg/l |
| 7 May 2025, 10:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Mar 2025, 11:12 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2025, 13:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Jan 2025, 09:38 | 0.079 | 0.079 mg/l |
| 9 Dec 2024, 13:34 | 0.074 | 0.074 mg/l |
| 15 Nov 2024, 11:42 | 0.093 | 0.093 mg/l |
| 2 Oct 2024, 11:41 | 0.12 | 0.12 mg/l |
| 3 Sep 2024, 12:06 | 0.12 | 0.12 mg/l |
| 1 Aug 2024, 12:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jul 2024, 11:57 | 0.11 | 0.11 mg/l |
| 14 Jun 2024, 09:32 | 0.052 | 0.052 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
14 mg/l
Sampled 10 Aug 2026, 52 days ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Aug 2026, 10:10 | 14 | 14 mg/l |
| 20 Jul 2026, 12:02 | 13 | 13 mg/l |
| 17 Jun 2026, 10:50 | 9.14 | 9.14 mg/l |
| 1 May 2026, 10:22 | 0.389 | 0.389 mg/l |
| 1 Apr 2026, 10:26 | 0.841 | 0.841 mg/l |
| 2 Mar 2026, 13:15 | 1.09 | 1.09 mg/l |
| 2 Feb 2026, 11:21 | 6.37 | 6.37 mg/l |
| 5 Jan 2026, 11:38 | 1.78 | 1.78 mg/l |
| 1 Dec 2025, 11:29 | 1.68 | 1.68 mg/l |
| 7 Nov 2025, 09:51 | 1.49 | 1.49 mg/l |
| 14 Oct 2025, 13:57 | 1.59 | 1.59 mg/l |
| 22 Sep 2025, 11:38 | 1.79 | 1.79 mg/l |
| 5 Aug 2025, 10:10 | 1.28 | 1.28 mg/l |
| 3 Jul 2025, 09:14 | 1.68 | 1.68 mg/l |
| 19 Jun 2025, 09:04 | 1.68 | 1.68 mg/l |
| 7 May 2025, 10:43 | 8.98 | 8.98 mg/l |
| 11 Mar 2025, 11:12 | 6.28 | 6.28 mg/l |
| 4 Feb 2025, 13:57 | 1.79 | 1.79 mg/l |
| 21 Jan 2025, 09:38 | 1.48 | 1.48 mg/l |
| 9 Dec 2024, 13:34 | 0.983 | 0.983 mg/l |
| 15 Nov 2024, 11:42 | 0.57 | 0.57 mg/l |
| 2 Oct 2024, 11:41 | 1.15 | 1.15 mg/l |
| 3 Sep 2024, 12:06 | 0.364 | 0.364 mg/l |
| 1 Aug 2024, 12:20 | 5.89 | 5.89 mg/l |
| 15 Jul 2024, 11:57 | 0.184 | 0.184 mg/l |
| 14 Jun 2024, 09:32 | 0.545 | 0.545 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.42 mg/l
Sampled 20 Jul 2026, 2 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 20 Jul 2026, 12:02 | 0.42 | 0.42 mg/l |
| 17 Jun 2026, 10:50 | 0.43 | 0.43 mg/l |
| 1 May 2026, 10:22 | 0.044 | 0.044 mg/l |
| 1 Apr 2026, 10:26 | 0.04 | 0.04 mg/l |
| 2 Mar 2026, 13:15 | <0.01 | below 0.01 mg/l (not detected above this) |
| 2 Feb 2026, 11:21 | 0.2 | 0.2 mg/l |
| 5 Jan 2026, 11:38 | 0.088 | 0.088 mg/l |
| 1 Dec 2025, 11:29 | 0.11 | 0.11 mg/l |
| 7 Nov 2025, 09:51 | 0.097 | 0.097 mg/l |
| 14 Oct 2025, 13:57 | 0.12 | 0.12 mg/l |
| 22 Sep 2025, 11:38 | 0.13 | 0.13 mg/l |
| 5 Aug 2025, 10:10 | 0.048 | 0.048 mg/l |
| 3 Jul 2025, 09:14 | 0.046 | 0.046 mg/l |
| 19 Jun 2025, 09:04 | 0.063 | 0.063 mg/l |
| 7 May 2025, 10:43 | 0.22 | 0.22 mg/l |
| 11 Mar 2025, 11:12 | 0.2 | 0.2 mg/l |
| 4 Feb 2025, 13:57 | 0.057 | 0.057 mg/l |
| 21 Jan 2025, 09:38 | 0.072 | 0.072 mg/l |
| 9 Dec 2024, 13:34 | 0.068 | 0.068 mg/l |
| 15 Nov 2024, 11:42 | 0.093 | 0.093 mg/l |
| 2 Oct 2024, 11:41 | 0.2 | 0.2 mg/l |
| 3 Sep 2024, 12:06 | 0.1 | 0.1 mg/l |
| 1 Aug 2024, 12:20 | 0.31 | 0.31 mg/l |
| 15 Jul 2024, 11:57 | 0.033 | 0.033 mg/l |
| 14 Jun 2024, 09:32 | 0.034 | 0.034 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
891 µS/cm
Sampled 10 Aug 2026, 52 days ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 10 Aug 2026, 10:10 | 891 | 891 µS/cm |
| 20 Jul 2026, 12:02 | 835 | 835 µS/cm |
| 17 Jun 2026, 10:50 | 804 | 804 µS/cm |
| 1 May 2026, 10:22 | 697 | 697 µS/cm |
| 1 Apr 2026, 10:26 | 718 | 718 µS/cm |
| 2 Mar 2026, 13:15 | 720 | 720 µS/cm |
| 2 Feb 2026, 11:21 | 751 | 751 µS/cm |
| 5 Jan 2026, 11:38 | 701 | 701 µS/cm |
| 1 Dec 2025, 11:29 | 691 | 691 µS/cm |
| 7 Nov 2025, 09:51 | 675 | 675 µS/cm |
| 14 Oct 2025, 13:57 | 672 | 672 µS/cm |
| 22 Sep 2025, 11:38 | 657 | 657 µS/cm |
| 5 Aug 2025, 10:10 | 640 | 640 µS/cm |
| 3 Jul 2025, 09:14 | 667 | 667 µS/cm |
| 19 Jun 2025, 09:04 | 690 | 690 µS/cm |
| 7 May 2025, 10:43 | 726 | 726 µS/cm |
| 3 Apr 2025, 11:28 | 712 | 712 µS/cm |
| 11 Mar 2025, 11:12 | 747 | 747 µS/cm |
| 4 Feb 2025, 13:57 | 698 | 698 µS/cm |
| 21 Jan 2025, 09:38 | 711 | 711 µS/cm |
| 9 Dec 2024, 13:34 | 658 | 658 µS/cm |
| 15 Nov 2024, 11:42 | 635 | 635 µS/cm |
| 2 Oct 2024, 11:41 | 616 | 616 µS/cm |
| 3 Sep 2024, 12:06 | 582 | 582 µS/cm |
| 1 Aug 2024, 12:20 | 737 | 737 µS/cm |
| 15 Jul 2024, 11:57 | 609 | 609 µS/cm |
| 14 Jun 2024, 09:32 | 694 | 694 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 | 27 | Jun 2024 – Aug 2026 | 85.7% 10 Aug 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 27 | Jun 2024 – Aug 2026 | 8.03 mg/l 10 Aug 2026 |
| Temperature of Water 0076 | River water | 27 | Jun 2024 – Aug 2026 | 18.4 °C 10 Aug 2026 |
| pH 0061 | River water | 26 | Jun 2024 – Aug 2026 | 8.08 10 Aug 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 26 | Jun 2024 – Aug 2026 | below 0.03 mg/l 10 Aug 2026 |
| Nitrate as N 0117 | River water | 26 | Jun 2024 – Aug 2026 | 14 mg/l 10 Aug 2026 |
| Orthophosphate, reactive as P 0180 | River water | 25 | Jun 2024 – Jul 2026 | 0.42 mg/l 20 Jul 2026 |
| Conductivity at 25 C 0077 | River water | 27 | Jun 2024 – Aug 2026 | 891 µS/cm 10 Aug 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 26 | Jun 2024 – Aug 2026 | 210 mg/l 10 Aug 2026 |
| Ammonia un-ionised as N 0119 | River water | 26 | Jun 2024 – Aug 2026 | below 0.00101 mg/l 10 Aug 2026 |
| Nitrite as N 0118 | River water | 26 | Jun 2024 – Aug 2026 | 0.014 mg/l 10 Aug 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 26 | Jun 2024 – Aug 2026 | 14 mg/l 10 Aug 2026 |
| No flow /No sample 7668 | River water | 1 | Sep 2026 – Sep 2026 | No flow/discharge at sampling point 21 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.