Butlers Marston Brook - Butlers Marston
EA name: BUTLERS MARSTON BK - BUTLERS MARSTON (also listed as “BUTLERS MARSTON BROOK - BUTLERS MARSTON”)
Environment Agency sampling point MD-10416140 · 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
- 17 Apr 2026, 11:435 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
- 20 since 18 Oct 2023 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 432000, 250100As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Butlers Marston Brook
- River, by the map
- Not placedGrid reference only to 100 m and no line carries the name it gives, so position alone cannot choose. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (20 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
108.9%
Sampled 17 Apr 2026, 5 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Apr 2026, 11:43 | 108.9 | 108.9% |
| 7 Jan 2026, 12:54 | 98.4 | 98.4% |
| 29 Oct 2025, 09:53 | 73.5 | 73.5% |
| 31 Jul 2025, 15:26 | 161.5 | 161.5% |
| 6 Mar 2025, 13:43 | 108.3 | 108.3% |
| 12 Feb 2025, 10:47 | 96.5 | 96.5% |
| 22 Jan 2025, 10:34 | 95.8 | 95.8% |
| 9 Dec 2024, 11:38 | 96.1 | 96.1% |
| 24 Oct 2024, 10:25 | 91.6 | 91.6% |
| 24 Sep 2024, 13:22 | 96.4 | 96.4% |
| 29 Aug 2024, 10:38 | 91 | 91% |
| 29 May 2024, 10:37 | 91.1 | 91.1% |
| 25 Apr 2024, 11:29 | 104.4 | 104.4% |
| 20 Mar 2024, 09:50 | 98.2 | 98.2% |
| 28 Feb 2024, 10:27 | 90.4 | 90.4% |
| 30 Jan 2024, 11:16 | 95 | 95% |
| 15 Dec 2023, 10:46 | 95 | 95% |
| 27 Nov 2023, 11:59 | 88.7 | 88.7% |
| 24 Oct 2023, 09:29 | 89 | 89% |
| 18 Oct 2023, 09:23 | 89.1 | 89.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.5 mg/l
Sampled 17 Apr 2026, 5 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Apr 2026, 11:43 | 11.5 | 11.5 mg/l |
| 7 Jan 2026, 12:54 | 13.2 | 13.2 mg/l |
| 29 Oct 2025, 09:53 | 8.32 | 8.32 mg/l |
| 31 Jul 2025, 15:26 | 14.4 | 14.4 mg/l |
| 6 Mar 2025, 13:43 | 12.5 | 12.5 mg/l |
| 12 Feb 2025, 10:47 | 12.4 | 12.4 mg/l |
| 22 Jan 2025, 10:34 | 12.3 | 12.3 mg/l |
| 9 Dec 2024, 11:38 | 11.5 | 11.5 mg/l |
| 24 Oct 2024, 10:25 | 9.92 | 9.92 mg/l |
| 24 Sep 2024, 13:22 | 9.78 | 9.78 mg/l |
| 29 Aug 2024, 10:38 | 9.21 | 9.21 mg/l |
| 29 May 2024, 10:37 | 9.28 | 9.28 mg/l |
| 25 Apr 2024, 11:29 | 12.2 | 12.2 mg/l |
| 20 Mar 2024, 09:50 | 10.9 | 10.9 mg/l |
| 28 Feb 2024, 10:27 | 10.9 | 10.9 mg/l |
| 30 Jan 2024, 11:16 | 11.2 | 11.2 mg/l |
| 15 Dec 2023, 10:46 | 11 | 11 mg/l |
| 27 Nov 2023, 11:59 | 10.7 | 10.7 mg/l |
| 24 Oct 2023, 09:29 | 9.75 | 9.75 mg/l |
| 18 Oct 2023, 09:23 | 9.94 | 9.94 mg/l |
Water temperature
code 0076 · °C
12.8 °C
Sampled 17 Apr 2026, 5 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Apr 2026, 11:43 | 12.8 | 12.8 °C |
| 7 Jan 2026, 12:54 | 3.2 | 3.2 °C |
| 29 Oct 2025, 09:53 | 9.8 | 9.8 °C |
| 31 Jul 2025, 15:26 | 20.7 | 20.7 °C |
| 6 Mar 2025, 13:43 | 9.1 | 9.1 °C |
| 12 Feb 2025, 10:47 | 4.8 | 4.8 °C |
| 22 Jan 2025, 10:34 | 4.9 | 4.9 °C |
| 9 Dec 2024, 11:38 | 7.6 | 7.6 °C |
| 24 Oct 2024, 10:25 | 11.7 | 11.7 °C |
| 24 Sep 2024, 13:22 | 14.6 | 14.6 °C |
| 29 Aug 2024, 10:38 | 14.7 | 14.7 °C |
| 29 May 2024, 10:37 | 14.4 | 14.4 °C |
| 25 Apr 2024, 11:29 | 8.5 | 8.5 °C |
| 20 Mar 2024, 09:50 | 10.7 | 10.7 °C |
| 28 Feb 2024, 10:27 | 7.1 | 7.1 °C |
| 30 Jan 2024, 11:16 | 8.3 | 8.3 °C |
| 15 Dec 2023, 10:46 | 8.7 | 8.7 °C |
| 27 Nov 2023, 11:59 | 7.3 | 7.3 °C |
| 24 Oct 2023, 09:29 | 11.2 | 11.2 °C |
| 18 Oct 2023, 09:23 | 10.4 | 10.4 °C |
pH
code 0061
8.1
Sampled 17 Apr 2026, 5 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Apr 2026, 11:43 | 8.1 | 8.1 |
| 7 Jan 2026, 12:54 | 7.9 | 7.9 |
| 29 Oct 2025, 09:53 | 7.89 | 7.89 |
| 31 Jul 2025, 15:26 | 8.18 | 8.18 |
| 6 Mar 2025, 13:43 | 8.13 | 8.13 |
| 12 Feb 2025, 10:47 | 7.92 | 7.92 |
| 22 Jan 2025, 10:34 | 7.92 | 7.92 |
| 9 Dec 2024, 11:38 | 7.95 | 7.95 |
| 24 Oct 2024, 10:25 | 7.7 | 7.7 |
| 24 Sep 2024, 13:22 | 7.78 | 7.78 |
| 29 Aug 2024, 10:38 | 7.86 | 7.86 |
| 29 May 2024, 10:37 | 7.83 | 7.83 |
| 25 Apr 2024, 11:29 | 7.96 | 7.96 |
| 20 Mar 2024, 09:50 | 7.99 | 7.99 |
| 28 Feb 2024, 10:27 | 7.79 | 7.79 |
| 30 Jan 2024, 11:16 | 8.03 | 8.03 |
| 15 Dec 2023, 10:46 | 7.78 | 7.78 |
| 27 Nov 2023, 11:59 | 7.87 | 7.87 |
| 24 Oct 2023, 09:29 | 7.77 | 7.77 |
| 18 Oct 2023, 09:23 | 7.4 | 7.4 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 17 Apr 2026, 5 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Apr 2026, 11:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Jan 2026, 12:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Oct 2025, 09:53 | 0.034 | 0.034 mg/l |
| 31 Jul 2025, 15:26 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Mar 2025, 13:43 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Feb 2025, 10:47 | 0.032 | 0.032 mg/l |
| 22 Jan 2025, 10:34 | 0.049 | 0.049 mg/l |
| 9 Dec 2024, 11:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Oct 2024, 10:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Sep 2024, 13:22 | 0.046 | 0.046 mg/l |
| 29 Aug 2024, 10:38 | 0.059 | 0.059 mg/l |
| 29 May 2024, 10:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Apr 2024, 11:29 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Mar 2024, 09:50 | 0.05 | 0.05 mg/l |
| 28 Feb 2024, 10:27 | 0.051 | 0.051 mg/l |
| 30 Jan 2024, 11:16 | 0.059 | 0.059 mg/l |
| 15 Dec 2023, 10:46 | 0.12 | 0.12 mg/l |
| 27 Nov 2023, 11:59 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Oct 2023, 09:29 | 0.036 | 0.036 mg/l |
| 18 Oct 2023, 09:23 | 0.03 | 0.03 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.39 mg/l
Sampled 17 Apr 2026, 5 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Apr 2026, 11:43 | 2.39 | 2.39 mg/l |
| 7 Jan 2026, 12:54 | 9.98 | 9.98 mg/l |
| 29 Oct 2025, 09:53 | 0.283 | 0.283 mg/l |
| 31 Jul 2025, 15:26 | 0.194 | 0.194 mg/l |
| 6 Mar 2025, 13:43 | 4.29 | 4.29 mg/l |
| 12 Feb 2025, 10:47 | 4.29 | 4.29 mg/l |
| 22 Jan 2025, 10:34 | 4.09 | 4.09 mg/l |
| 9 Dec 2024, 11:38 | 5.19 | 5.19 mg/l |
| 24 Oct 2024, 10:25 | 3.98 | 3.98 mg/l |
| 24 Sep 2024, 13:22 | 13.9 | 13.9 mg/l |
| 29 Aug 2024, 10:38 | 0.814 | 0.814 mg/l |
| 29 May 2024, 10:37 | 3.78 | 3.78 mg/l |
| 25 Apr 2024, 11:29 | 3.69 | 3.69 mg/l |
| 20 Mar 2024, 09:50 | 4.28 | 4.28 mg/l |
| 28 Feb 2024, 10:27 | 5.29 | 5.29 mg/l |
| 30 Jan 2024, 11:16 | 4.47 | 4.47 mg/l |
| 15 Dec 2023, 10:46 | 6.28 | 6.28 mg/l |
| 27 Nov 2023, 11:59 | 4.38 | 4.38 mg/l |
| 24 Oct 2023, 09:29 | 6.37 | 6.37 mg/l |
| 18 Oct 2023, 09:23 | 4.95 | 4.95 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
below 0.01 mg/l (not detected above this)
Sampled 17 Apr 2026, 5 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Apr 2026, 11:43 | <0.01 | below 0.01 mg/l (not detected above this) |
| 7 Jan 2026, 12:54 | 0.041 | 0.041 mg/l |
| 29 Oct 2025, 09:53 | 0.04 | 0.04 mg/l |
| 31 Jul 2025, 15:26 | 0.025 | 0.025 mg/l |
| 6 Mar 2025, 13:43 | 0.032 | 0.032 mg/l |
| 12 Feb 2025, 10:47 | 0.053 | 0.053 mg/l |
| 22 Jan 2025, 10:34 | 0.04 | 0.04 mg/l |
| 9 Dec 2024, 11:38 | 0.039 | 0.039 mg/l |
| 24 Oct 2024, 10:25 | 0.025 | 0.025 mg/l |
| 24 Sep 2024, 13:22 | 0.081 | 0.081 mg/l |
| 29 Aug 2024, 10:38 | 0.042 | 0.042 mg/l |
| 29 May 2024, 10:37 | 0.037 | 0.037 mg/l |
| 25 Apr 2024, 11:29 | 0.018 | 0.018 mg/l |
| 20 Mar 2024, 09:50 | 0.049 | 0.049 mg/l |
| 28 Feb 2024, 10:27 | 0.042 | 0.042 mg/l |
| 30 Jan 2024, 11:16 | 0.052 | 0.052 mg/l |
| 15 Dec 2023, 10:46 | 0.043 | 0.043 mg/l |
| 27 Nov 2023, 11:59 | 0.04 | 0.04 mg/l |
| 24 Oct 2023, 09:29 | 0.051 | 0.051 mg/l |
| 18 Oct 2023, 09:23 | 0.035 | 0.035 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
753 µS/cm
Sampled 17 Apr 2026, 5 months ago · 20 results banked
Every result (20)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Apr 2026, 11:43 | 753 | 753 µS/cm |
| 7 Jan 2026, 12:54 | 837 | 837 µS/cm |
| 29 Oct 2025, 09:53 | 902 | 902 µS/cm |
| 31 Jul 2025, 15:26 | 813 | 813 µS/cm |
| 6 Mar 2025, 13:43 | 758 | 758 µS/cm |
| 12 Feb 2025, 10:47 | 664 | 664 µS/cm |
| 22 Jan 2025, 10:34 | 756 | 756 µS/cm |
| 9 Dec 2024, 11:38 | 503 | 503 µS/cm |
| 24 Oct 2024, 10:25 | 675 | 675 µS/cm |
| 24 Sep 2024, 13:22 | 496 | 496 µS/cm |
| 29 Aug 2024, 10:38 | 858 | 858 µS/cm |
| 29 May 2024, 10:37 | 826 | 826 µS/cm |
| 25 Apr 2024, 11:29 | 777 | 777 µS/cm |
| 20 Mar 2024, 09:50 | 648 | 648 µS/cm |
| 28 Feb 2024, 10:27 | 758 | 758 µS/cm |
| 30 Jan 2024, 11:16 | 788 | 788 µS/cm |
| 15 Dec 2023, 10:46 | 716 | 716 µS/cm |
| 27 Nov 2023, 11:59 | 782 | 782 µS/cm |
| 24 Oct 2023, 09:29 | 769 | 769 µS/cm |
| 18 Oct 2023, 09:23 | 841 | 841 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 | 20 | Oct 2023 – Apr 2026 | 108.9% 17 Apr 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 20 | Oct 2023 – Apr 2026 | 11.5 mg/l 17 Apr 2026 |
| Temperature of Water 0076 | River water | 20 | Oct 2023 – Apr 2026 | 12.8 °C 17 Apr 2026 |
| pH 0061 | River water | 20 | Oct 2023 – Apr 2026 | 8.1 17 Apr 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 20 | Oct 2023 – Apr 2026 | below 0.03 mg/l 17 Apr 2026 |
| Nitrate as N 0117 | River water | 20 | Oct 2023 – Apr 2026 | 2.39 mg/l 17 Apr 2026 |
| Orthophosphate, reactive as P 0180 | River water | 20 | Oct 2023 – Apr 2026 | below 0.01 mg/l 17 Apr 2026 |
| Conductivity at 25 C 0077 | River water | 20 | Oct 2023 – Apr 2026 | 753 µS/cm 17 Apr 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 20 | Oct 2023 – Apr 2026 | 230 mg/l 17 Apr 2026 |
| Ammonia un-ionised as N 0119 | River water | 20 | Oct 2023 – Apr 2026 | below 0.00067 mg/l 17 Apr 2026 |
| BOD : 5 Day ATU 0085 | River water | 15 | Feb 2024 – Apr 2026 | 1.5 mg/l 17 Apr 2026 |
| Nitrite as N 0118 | River water | 20 | Oct 2023 – Apr 2026 | 0.015 mg/l 17 Apr 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 20 | Oct 2023 – Apr 2026 | 2.4 mg/l 17 Apr 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.