Bourne Brook near Letches Farm
EA name: BOURNE BK.NR.LETCHES FARM
Environment Agency sampling point AN-BB0125 · 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
- 11 Mar 2026, 09:317 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
- 28 since 3 Oct 2023 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 580900, 228580As published, to the nearest 10 m. Open in a map
- River, by its own name
- Bourne Brook
- River, by the map
- Bourne BrookPlaced on the river its name gives, 20 m from the line.
- Next gauge downstream
- EARLS COLNE FGS 7.5 km along the riverEarls Colne On the River Colne · 7.5 km along the river
- Why it was sampled
- Environmental monitoring statutory (EU directives) (28 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
94.5%
Sampled 11 Mar 2026, 7 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 09:31 | 94.5 | 94.5% |
| 9 Feb 2026, 13:30 | 96.5 | 96.5% |
| 5 Jan 2026, 13:58 | 93.5 | 93.5% |
| 3 Dec 2025, 12:23 | 89.2 | 89.2% |
| 12 Nov 2025, 13:10 | 71.5 | 71.5% |
| 9 Oct 2025, 10:23 | 85.4 | 85.4% |
| 5 Sep 2025, 09:51 | 78.4 | 78.4% |
| 14 Aug 2025, 09:57 | 75 | 75% |
| 28 Jul 2025, 09:06 | 85.1 | 85.1% |
| 11 Jun 2025, 09:20 | 86.2 | 86.2% |
| 9 May 2025, 11:47 | 93.7 | 93.7% |
| 1 Apr 2025, 12:16 | 96.2 | 96.2% |
| 7 Mar 2025, 10:48 | 101 | 101% |
| 10 Feb 2025, 08:22 | 96.5 | 96.5% |
| 10 Jan 2025, 13:45 | 95.7 | 95.7% |
| 2 Dec 2024, 14:06 | 87.2 | 87.2% |
| 4 Nov 2024, 13:24 | 84.7 | 84.7% |
| 2 Oct 2024, 08:04 | 91.1 | 91.1% |
| 11 Sep 2024, 08:37 | 84.2 | 84.2% |
| 2 Aug 2024, 07:29 | 82.8 | 82.8% |
| 1 Jul 2024, 09:55 | 85.9 | 85.9% |
| 14 Jun 2024, 11:47 | 84.4 | 84.4% |
| 8 Mar 2024, 13:37 | 97.1 | 97.1% |
| 1 Feb 2024, 14:22 | 94.4 | 94.4% |
| 2 Jan 2024, 11:57 | 102.5 | 102.5% |
| 7 Dec 2023, 13:55 | 92.3 | 92.3% |
| 9 Nov 2023, 11:44 | 93.7 | 93.7% |
| 3 Oct 2023, 11:41 | 86.6 | 86.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.9 mg/l
Sampled 11 Mar 2026, 7 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 09:31 | 10.9 | 10.9 mg/l |
| 9 Feb 2026, 13:30 | 11.6 | 11.6 mg/l |
| 5 Jan 2026, 13:58 | 12.9 | 12.9 mg/l |
| 3 Dec 2025, 12:23 | 10.9 | 10.9 mg/l |
| 12 Nov 2025, 13:10 | 7.6 | 7.6 mg/l |
| 9 Oct 2025, 10:23 | 9.51 | 9.51 mg/l |
| 5 Sep 2025, 09:51 | 8.04 | 8.04 mg/l |
| 14 Aug 2025, 09:57 | 7.07 | 7.07 mg/l |
| 28 Jul 2025, 09:06 | 8.6 | 8.6 mg/l |
| 11 Jun 2025, 09:20 | 8.86 | 8.86 mg/l |
| 9 May 2025, 11:47 | 10.1 | 10.1 mg/l |
| 1 Apr 2025, 12:16 | 10.8 | 10.8 mg/l |
| 7 Mar 2025, 10:48 | 11.9 | 11.9 mg/l |
| 10 Feb 2025, 08:22 | 12.5 | 12.5 mg/l |
| 10 Jan 2025, 13:45 | 13.1 | 13.1 mg/l |
| 2 Dec 2024, 14:06 | 10.2 | 10.2 mg/l |
| 4 Nov 2024, 13:24 | 9.19 | 9.19 mg/l |
| 2 Oct 2024, 08:04 | 9.53 | 9.53 mg/l |
| 11 Sep 2024, 08:37 | 9.07 | 9.07 mg/l |
| 2 Aug 2024, 07:29 | 8.01 | 8.01 mg/l |
| 1 Jul 2024, 09:55 | 8.66 | 8.66 mg/l |
| 14 Jun 2024, 11:47 | 8.75 | 8.75 mg/l |
| 8 Mar 2024, 13:37 | 11.5 | 11.5 mg/l |
| 1 Feb 2024, 14:22 | 11.4 | 11.4 mg/l |
| 2 Jan 2024, 11:57 | 12 | 12 mg/l |
| 7 Dec 2023, 13:55 | 11.9 | 11.9 mg/l |
| 9 Nov 2023, 11:44 | 10.8 | 10.8 mg/l |
| 3 Oct 2023, 11:41 | 8.71 | 8.71 mg/l |
Water temperature
code 0076 · °C
9.2 °C
Sampled 11 Mar 2026, 7 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 09:31 | 9.2 | 9.2 °C |
| 9 Feb 2026, 13:30 | 7.4 | 7.4 °C |
| 5 Jan 2026, 13:58 | 2.1 | 2.1 °C |
| 3 Dec 2025, 12:23 | 6.7 | 6.7 °C |
| 12 Nov 2025, 13:10 | 12.5 | 12.5 °C |
| 9 Oct 2025, 10:23 | 10.5 | 10.5 °C |
| 5 Sep 2025, 09:51 | 14.1 | 14.1 °C |
| 14 Aug 2025, 09:57 | 18.1 | 18.1 °C |
| 28 Jul 2025, 09:06 | 14.8 | 14.8 °C |
| 11 Jun 2025, 09:20 | 14 | 14 °C |
| 9 May 2025, 11:47 | 12.1 | 12.1 °C |
| 1 Apr 2025, 12:16 | 10.3 | 10.3 °C |
| 7 Mar 2025, 10:48 | 8.2 | 8.2 °C |
| 10 Feb 2025, 08:22 | 4.5 | 4.5 °C |
| 10 Jan 2025, 13:45 | 2.4 | 2.4 °C |
| 2 Dec 2024, 14:06 | 8.4 | 8.4 °C |
| 4 Nov 2024, 13:24 | 11.6 | 11.6 °C |
| 2 Oct 2024, 08:04 | 13.2 | 13.2 °C |
| 11 Sep 2024, 08:37 | 11.9 | 11.9 °C |
| 2 Aug 2024, 07:29 | 16.8 | 16.8 °C |
| 1 Jul 2024, 09:55 | 14.9 | 14.9 °C |
| 14 Jun 2024, 11:47 | 13.6 | 13.6 °C |
| 8 Mar 2024, 13:37 | 8.1 | 8.1 °C |
| 1 Feb 2024, 14:22 | 7.1 | 7.1 °C |
| 2 Jan 2024, 11:57 | 8.3 | 8.3 °C |
| 7 Dec 2023, 13:55 | 4.5 | 4.5 °C |
| 9 Nov 2023, 11:44 | 8.9 | 8.9 °C |
| 3 Oct 2023, 11:41 | 15 | 15 °C |
pH
code 0061
7.92
Sampled 11 Mar 2026, 7 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 09:31 | 7.92 | 7.92 |
| 9 Feb 2026, 13:30 | 7.93 | 7.93 |
| 5 Jan 2026, 13:58 | 8.05 | 8.05 |
| 3 Dec 2025, 12:23 | 7.79 | 7.79 |
| 12 Nov 2025, 13:10 | 7.74 | 7.74 |
| 9 Oct 2025, 10:23 | 7.98 | 7.98 |
| 5 Sep 2025, 09:51 | 7.84 | 7.84 |
| 14 Aug 2025, 09:57 | 7.9 | 7.9 |
| 28 Jul 2025, 09:06 | 8.03 | 8.03 |
| 11 Jun 2025, 09:20 | 7.85 | 7.85 |
| 9 May 2025, 11:47 | 8.06 | 8.06 |
| 1 Apr 2025, 12:16 | 8.14 | 8.14 |
| 7 Mar 2025, 10:48 | 8.17 | 8.17 |
| 10 Feb 2025, 08:22 | 7.95 | 7.95 |
| 10 Jan 2025, 13:45 | 7.9 | 7.9 |
| 2 Dec 2024, 14:06 | 7.75 | 7.75 |
| 4 Nov 2024, 13:24 | 7.82 | 7.82 |
| 2 Oct 2024, 08:04 | 7.86 | 7.86 |
| 11 Sep 2024, 08:37 | 8.33 | 8.33 |
| 2 Aug 2024, 07:29 | 8.02 | 8.02 |
| 1 Jul 2024, 09:55 | 7.92 | 7.92 |
| 14 Jun 2024, 11:47 | 8.01 | 8.01 |
| 8 Mar 2024, 13:37 | 8.09 | 8.09 |
| 1 Feb 2024, 14:22 | 8.08 | 8.08 |
| 2 Jan 2024, 11:57 | 7.99 | 7.99 |
| 7 Dec 2023, 13:55 | 7.9 | 7.9 |
| 9 Nov 2023, 11:44 | 7.89 | 7.89 |
| 3 Oct 2023, 11:41 | 8.06 | 8.06 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 11 Mar 2026, 7 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 09:31 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Feb 2026, 13:30 | 0.047 | 0.047 mg/l |
| 5 Jan 2026, 13:58 | 0.18 | 0.18 mg/l |
| 3 Dec 2025, 12:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Nov 2025, 13:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 Oct 2025, 10:23 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Sep 2025, 09:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Aug 2025, 09:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Jul 2025, 09:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Jun 2025, 09:20 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 May 2025, 11:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Mar 2025, 10:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Feb 2025, 08:22 | 0.092 | 0.092 mg/l |
| 10 Jan 2025, 13:45 | 0.06 | 0.06 mg/l |
| 2 Dec 2024, 14:06 | 0.076 | 0.076 mg/l |
| 4 Nov 2024, 13:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Oct 2024, 08:04 | 0.04 | 0.04 mg/l |
| 11 Sep 2024, 08:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Aug 2024, 07:29 | 0.043 | 0.043 mg/l |
| 1 Jul 2024, 09:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Jun 2024, 11:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Mar 2024, 13:37 | 0.071 | 0.071 mg/l |
| 2 Jan 2024, 11:57 | 0.057 | 0.057 mg/l |
| 7 Dec 2023, 13:55 | 0.037 | 0.037 mg/l |
| 9 Nov 2023, 11:44 | 0.037 | 0.037 mg/l |
| 3 Oct 2023, 11:41 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
8.78 mg/l
Sampled 11 Mar 2026, 7 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 09:31 | 8.78 | 8.78 mg/l |
| 9 Feb 2026, 13:30 | 9.87 | 9.87 mg/l |
| 5 Jan 2026, 13:58 | 12.9 | 12.9 mg/l |
| 3 Dec 2025, 12:23 | 9.92 | 9.92 mg/l |
| 12 Nov 2025, 13:10 | 3.79 | 3.79 mg/l |
| 9 Oct 2025, 10:23 | 5.59 | 5.59 mg/l |
| 5 Sep 2025, 09:51 | 3.97 | 3.97 mg/l |
| 14 Aug 2025, 09:57 | 3.79 | 3.79 mg/l |
| 28 Jul 2025, 09:06 | 4.4 | 4.4 mg/l |
| 11 Jun 2025, 09:20 | 3.59 | 3.59 mg/l |
| 9 May 2025, 11:47 | 5.68 | 5.68 mg/l |
| 7 Mar 2025, 10:48 | 9.97 | 9.97 mg/l |
| 10 Feb 2025, 08:22 | 11 | 11 mg/l |
| 10 Jan 2025, 13:45 | 13 | 13 mg/l |
| 2 Dec 2024, 14:06 | 9.9 | 9.9 mg/l |
| 4 Nov 2024, 13:24 | 6.27 | 6.27 mg/l |
| 2 Oct 2024, 08:04 | 4.07 | 4.07 mg/l |
| 11 Sep 2024, 08:37 | 4.89 | 4.89 mg/l |
| 2 Aug 2024, 07:29 | 4.99 | 4.99 mg/l |
| 1 Jul 2024, 09:55 | 4.8 | 4.8 mg/l |
| 14 Jun 2024, 11:47 | 5.99 | 5.99 mg/l |
| 8 Mar 2024, 13:37 | 7.83 | 7.83 mg/l |
| 1 Feb 2024, 14:22 | 8.25 | 8.25 mg/l |
| 2 Jan 2024, 11:57 | 7.17 | 7.17 mg/l |
| 7 Dec 2023, 13:55 | 9.95 | 9.95 mg/l |
| 9 Nov 2023, 11:44 | 9.91 | 9.91 mg/l |
| 3 Oct 2023, 11:41 | 4.39 | 4.39 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
below 0.01 mg/l (not detected above this)
Sampled 11 Mar 2026, 7 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 09:31 | <0.01 | below 0.01 mg/l (not detected above this) |
| 9 Feb 2026, 13:30 | 0.097 | 0.097 mg/l |
| 5 Jan 2026, 13:58 | 0.074 | 0.074 mg/l |
| 3 Dec 2025, 12:23 | 0.073 | 0.073 mg/l |
| 12 Nov 2025, 13:10 | 0.13 | 0.13 mg/l |
| 9 Oct 2025, 10:23 | 0.092 | 0.092 mg/l |
| 5 Sep 2025, 09:51 | 0.16 | 0.16 mg/l |
| 14 Aug 2025, 09:57 | 0.19 | 0.19 mg/l |
| 28 Jul 2025, 09:06 | 0.28 | 0.28 mg/l |
| 11 Jun 2025, 09:20 | 0.24 | 0.24 mg/l |
| 9 May 2025, 11:47 | 0.11 | 0.11 mg/l |
| 7 Mar 2025, 10:48 | 0.031 | 0.031 mg/l |
| 10 Feb 2025, 08:22 | 0.094 | 0.094 mg/l |
| 10 Jan 2025, 13:45 | 0.12 | 0.12 mg/l |
| 2 Dec 2024, 14:06 | 0.16 | 0.16 mg/l |
| 4 Nov 2024, 13:24 | 0.34 | 0.34 mg/l |
| 2 Oct 2024, 08:04 | 0.18 | 0.18 mg/l |
| 11 Sep 2024, 08:37 | 0.34 | 0.34 mg/l |
| 2 Aug 2024, 07:29 | 0.26 | 0.26 mg/l |
| 1 Jul 2024, 09:55 | 0.21 | 0.21 mg/l |
| 14 Jun 2024, 11:47 | 0.19 | 0.19 mg/l |
| 8 Mar 2024, 13:37 | 0.11 | 0.11 mg/l |
| 1 Feb 2024, 14:22 | 0.12 | 0.12 mg/l |
| 2 Jan 2024, 11:57 | 0.082 | 0.082 mg/l |
| 7 Dec 2023, 13:55 | 0.13 | 0.13 mg/l |
| 9 Nov 2023, 11:44 | 0.11 | 0.11 mg/l |
| 3 Oct 2023, 11:41 | 0.18 | 0.18 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
633 µS/cm
Sampled 11 Mar 2026, 7 months ago · 28 results banked
Every result (28)
| Sampled | Result as published | Reads as |
|---|---|---|
| 11 Mar 2026, 09:31 | 633 | 633 µS/cm |
| 9 Feb 2026, 13:30 | 494 | 494 µS/cm |
| 5 Jan 2026, 13:58 | 932 | 932 µS/cm |
| 3 Dec 2025, 12:23 | 779 | 779 µS/cm |
| 12 Nov 2025, 13:10 | 769 | 769 µS/cm |
| 9 Oct 2025, 10:23 | 873 | 873 µS/cm |
| 5 Sep 2025, 09:51 | 896 | 896 µS/cm |
| 14 Aug 2025, 09:57 | 857 | 857 µS/cm |
| 28 Jul 2025, 09:06 | 833 | 833 µS/cm |
| 11 Jun 2025, 09:20 | 719 | 719 µS/cm |
| 9 May 2025, 11:47 | 684 | 684 µS/cm |
| 1 Apr 2025, 12:16 | 689 | 689 µS/cm |
| 7 Mar 2025, 10:48 | 663 | 663 µS/cm |
| 10 Feb 2025, 08:22 | 684 | 684 µS/cm |
| 10 Jan 2025, 13:45 | 577 | 577 µS/cm |
| 2 Dec 2024, 14:06 | 681 | 681 µS/cm |
| 4 Nov 2024, 13:24 | 704 | 704 µS/cm |
| 2 Oct 2024, 08:04 | 545 | 545 µS/cm |
| 11 Sep 2024, 08:37 | 857 | 857 µS/cm |
| 2 Aug 2024, 07:29 | 706 | 706 µS/cm |
| 1 Jul 2024, 09:55 | 712 | 712 µS/cm |
| 14 Jun 2024, 11:47 | 692 | 692 µS/cm |
| 8 Mar 2024, 13:37 | 561 | 561 µS/cm |
| 1 Feb 2024, 14:22 | 664 | 664 µS/cm |
| 2 Jan 2024, 11:57 | 497 | 497 µS/cm |
| 7 Dec 2023, 13:55 | 627 | 627 µS/cm |
| 9 Nov 2023, 11:44 | 590 | 590 µS/cm |
| 3 Oct 2023, 11:41 | 750 | 750 µS/cm |
Everything measured here
12 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 12 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 28 | Oct 2023 – Mar 2026 | 94.5% 11 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 28 | Oct 2023 – Mar 2026 | 10.9 mg/l 11 Mar 2026 |
| Temperature of Water 0076 | River water | 28 | Oct 2023 – Mar 2026 | 9.2 °C 11 Mar 2026 |
| pH 0061 | River water | 28 | Oct 2023 – Mar 2026 | 7.92 11 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 26 | Oct 2023 – Mar 2026 | below 0.03 mg/l 11 Mar 2026 |
| Nitrate as N 0117 | River water | 27 | Oct 2023 – Mar 2026 | 8.78 mg/l 11 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 27 | Oct 2023 – Mar 2026 | below 0.01 mg/l 11 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 28 | Oct 2023 – Mar 2026 | 633 µS/cm 11 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 27 | Oct 2023 – Mar 2026 | 190 mg/l 11 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 26 | Oct 2023 – Mar 2026 | below 0.00043 mg/l 11 Mar 2026 |
| Nitrite as N 0118 | River water | 27 | Oct 2023 – Mar 2026 | 0.016 mg/l 11 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 27 | Oct 2023 – Mar 2026 | 8.8 mg/l 11 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.