River Brain Guithavon Flume
EA name: R.BRAIN GUITHAVON FLUME
Environment Agency sampling point AN-BR01 · 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
- 7 Sep 2026, 13:5024 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 24 since 16 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 581755, 214768As published, to the nearest 1 m. Open in a map
- River, by its own name
- Brain
- River, by the map
- River BrainPlaced on the river its name gives, 16 m from the line.
- Next gauge downstream
- None tracedIts water reaches the sea without passing a gauge.Beside Guithavon Valley: too close to say above or below.
- Nearest gauge upstream
- Braintree On the Pods Brook · 16 km along the river
- Why it was sampled
- Monitoring (national agency policy) (18 samples)
Environmental monitoring statutory (EU directives) (6 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
82.3%
Sampled 7 Sep 2026, 24 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:50 | 82.3 | 82.3% |
| 13 Aug 2026, 10:41 | 81.3 | 81.3% |
| 8 Jul 2026, 10:05 | 79.2 | 79.2% |
| 12 Jun 2026, 14:26 | 86.1 | 86.1% |
| 5 May 2026, 10:12 | 88.1 | 88.1% |
| 8 Apr 2026, 10:00 | 92.1 | 92.1% |
| 7 Mar 2025, 08:16 | 92.6 | 92.6% |
| 4 Feb 2025, 12:06 | 95 | 95% |
| 21 Jan 2025, 12:38 | 96.4 | 96.4% |
| 5 Dec 2024, 10:18 | 89.4 | 89.4% |
| 21 Nov 2024, 10:07 | 91.7 | 91.7% |
| 16 Oct 2024, 10:14 | 90.6 | 90.6% |
| 25 Sep 2024, 12:11 | 88.8 | 88.8% |
| 23 Aug 2024, 10:18 | 90.8 | 90.8% |
| 16 Jul 2024, 15:23 | 78.8 | 78.8% |
| 27 Jun 2024, 12:41 | 94.9 | 94.9% |
| 16 May 2024, 14:16 | 97 | 97% |
| 19 Apr 2024, 11:07 | 100.1 | 100.1% |
| 19 Mar 2024, 13:20 | 98.1 | 98.1% |
| 20 Feb 2024, 13:32 | 94 | 94% |
| 23 Jan 2024, 14:24 | 94.5 | 94.5% |
| 6 Dec 2023, 09:56 | 91.3 | 91.3% |
| 20 Nov 2023, 13:29 | 92.2 | 92.2% |
| 16 Oct 2023, 12:56 | 93.5 | 93.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
7.85 mg/l
Sampled 7 Sep 2026, 24 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:50 | 7.85 | 7.85 mg/l |
| 13 Aug 2026, 10:41 | 7.77 | 7.77 mg/l |
| 8 Jul 2026, 10:05 | 7.28 | 7.28 mg/l |
| 12 Jun 2026, 14:26 | 8.48 | 8.48 mg/l |
| 5 May 2026, 10:12 | 9.2 | 9.2 mg/l |
| 8 Apr 2026, 10:00 | 10.3 | 10.3 mg/l |
| 7 Mar 2025, 08:16 | 11 | 11 mg/l |
| 4 Feb 2025, 12:06 | 11.6 | 11.6 mg/l |
| 21 Jan 2025, 12:38 | 11.9 | 11.9 mg/l |
| 5 Dec 2024, 10:18 | 10 | 10 mg/l |
| 21 Nov 2024, 10:07 | 11.5 | 11.5 mg/l |
| 16 Oct 2024, 10:14 | 9.35 | 9.35 mg/l |
| 25 Sep 2024, 12:11 | 9.05 | 9.05 mg/l |
| 23 Aug 2024, 10:18 | 8.75 | 8.75 mg/l |
| 16 Jul 2024, 15:23 | 7.5 | 7.5 mg/l |
| 27 Jun 2024, 12:41 | 8.8 | 8.8 mg/l |
| 16 May 2024, 14:16 | 9.91 | 9.91 mg/l |
| 19 Apr 2024, 11:07 | 11.1 | 11.1 mg/l |
| 19 Mar 2024, 13:20 | 10.7 | 10.7 mg/l |
| 20 Feb 2024, 13:32 | 10.7 | 10.7 mg/l |
| 23 Jan 2024, 14:24 | 11.2 | 11.2 mg/l |
| 6 Dec 2023, 09:56 | 11.6 | 11.6 mg/l |
| 20 Nov 2023, 13:29 | 10.2 | 10.2 mg/l |
| 16 Oct 2023, 12:56 | 10.5 | 10.5 mg/l |
Water temperature
code 0076 · °C
17.5 °C
Sampled 7 Sep 2026, 24 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:50 | 17.5 | 17.5 °C |
| 13 Aug 2026, 10:41 | 17.4 | 17.4 °C |
| 8 Jul 2026, 10:05 | 19.3 | 19.3 °C |
| 12 Jun 2026, 14:26 | 16 | 16 °C |
| 5 May 2026, 10:12 | 13.3 | 13.3 °C |
| 8 Apr 2026, 10:00 | 10.3 | 10.3 °C |
| 7 Mar 2025, 08:16 | 7.8 | 7.8 °C |
| 4 Feb 2025, 12:06 | 6.7 | 6.7 °C |
| 21 Jan 2025, 12:38 | 6.2 | 6.2 °C |
| 5 Dec 2024, 10:18 | 10.1 | 10.1 °C |
| 21 Nov 2024, 10:07 | 5.7 | 5.7 °C |
| 16 Oct 2024, 10:14 | 13.8 | 13.8 °C |
| 25 Sep 2024, 12:11 | 14.4 | 14.4 °C |
| 23 Aug 2024, 10:18 | 17 | 17 °C |
| 16 Jul 2024, 15:23 | 17.6 | 17.6 °C |
| 27 Jun 2024, 12:41 | 18.9 | 18.9 °C |
| 16 May 2024, 14:16 | 14.3 | 14.3 °C |
| 19 Apr 2024, 11:07 | 10.7 | 10.7 °C |
| 19 Mar 2024, 13:20 | 11.4 | 11.4 °C |
| 20 Feb 2024, 13:32 | 9.4 | 9.4 °C |
| 23 Jan 2024, 14:24 | 7.9 | 7.9 °C |
| 6 Dec 2023, 09:56 | 5.3 | 5.3 °C |
| 20 Nov 2023, 13:29 | 10.6 | 10.6 °C |
| 16 Oct 2023, 12:56 | 10.3 | 10.3 °C |
pH
code 0061
7.87
Sampled 7 Sep 2026, 24 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:50 | 7.87 | 7.87 |
| 13 Aug 2026, 10:41 | 7.82 | 7.82 |
| 8 Jul 2026, 10:05 | 7.9 | 7.9 |
| 12 Jun 2026, 14:26 | 7.92 | 7.92 |
| 5 May 2026, 10:12 | 7.88 | 7.88 |
| 8 Apr 2026, 10:00 | 7.96 | 7.96 |
| 7 Mar 2025, 08:16 | 7.98 | 7.98 |
| 4 Feb 2025, 12:06 | 8.1 | 8.1 |
| 21 Jan 2025, 12:38 | 8.16 | 8.16 |
| 5 Dec 2024, 10:18 | 7.96 | 7.96 |
| 21 Nov 2024, 10:07 | 7.97 | 7.97 |
| 16 Oct 2024, 10:14 | 8.07 | 8.07 |
| 25 Sep 2024, 12:11 | 7.92 | 7.92 |
| 23 Aug 2024, 10:18 | 8.04 | 8.04 |
| 16 Jul 2024, 15:23 | 8.07 | 8.07 |
| 27 Jun 2024, 12:41 | 8 | 8 |
| 16 May 2024, 14:16 | 8.08 | 8.08 |
| 19 Apr 2024, 11:07 | 8.13 | 8.13 |
| 19 Mar 2024, 13:20 | 8.09 | 8.09 |
| 20 Feb 2024, 13:32 | 8.06 | 8.06 |
| 23 Jan 2024, 14:24 | 8.02 | 8.02 |
| 6 Dec 2023, 09:56 | 7.95 | 7.95 |
| 20 Nov 2023, 13:29 | 7.92 | 7.92 |
| 16 Oct 2023, 12:56 | 7.97 | 7.97 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 7 Sep 2026, 24 days ago · 23 results banked
Every result (23)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Aug 2026, 10:41 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jul 2026, 10:05 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 Jun 2026, 14:26 | 0.09 | 0.09 mg/l |
| 5 May 2026, 10:12 | 0.17 | 0.17 mg/l |
| 8 Apr 2026, 10:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Mar 2025, 08:16 | 0.11 | 0.11 mg/l |
| 4 Feb 2025, 12:06 | 0.054 | 0.054 mg/l |
| 21 Jan 2025, 12:38 | 0.057 | 0.057 mg/l |
| 5 Dec 2024, 10:18 | 0.072 | 0.072 mg/l |
| 21 Nov 2024, 10:07 | 0.049 | 0.049 mg/l |
| 16 Oct 2024, 10:14 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Sep 2024, 12:11 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Aug 2024, 10:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jul 2024, 15:23 | 0.18 | 0.18 mg/l |
| 27 Jun 2024, 12:41 | 0.038 | 0.038 mg/l |
| 16 May 2024, 14:16 | 0.044 | 0.044 mg/l |
| 19 Apr 2024, 11:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Mar 2024, 13:20 | 0.035 | 0.035 mg/l |
| 20 Feb 2024, 13:32 | 0.05 | 0.05 mg/l |
| 6 Dec 2023, 09:56 | 0.049 | 0.049 mg/l |
| 20 Nov 2023, 13:29 | 0.051 | 0.051 mg/l |
| 16 Oct 2023, 12:56 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
16 mg/l
Sampled 7 Sep 2026, 24 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:50 | 16 | 16 mg/l |
| 13 Aug 2026, 10:41 | 15 | 15 mg/l |
| 8 Jul 2026, 10:05 | 15 | 15 mg/l |
| 12 Jun 2026, 14:26 | 9.91 | 9.91 mg/l |
| 5 May 2026, 10:12 | 13.8 | 13.8 mg/l |
| 8 Apr 2026, 10:00 | 13.9 | 13.9 mg/l |
| 7 Mar 2025, 08:16 | 13.9 | 13.9 mg/l |
| 4 Feb 2025, 12:06 | 14.9 | 14.9 mg/l |
| 21 Jan 2025, 12:38 | 13.9 | 13.9 mg/l |
| 5 Dec 2024, 10:18 | 12.9 | 12.9 mg/l |
| 21 Nov 2024, 10:07 | 11 | 11 mg/l |
| 16 Oct 2024, 10:14 | 14 | 14 mg/l |
| 25 Sep 2024, 12:11 | 9.38 | 9.38 mg/l |
| 23 Aug 2024, 10:18 | 15 | 15 mg/l |
| 16 Jul 2024, 15:23 | 5.71 | 5.71 mg/l |
| 27 Jun 2024, 12:41 | 14.8 | 14.8 mg/l |
| 16 May 2024, 14:16 | 12.9 | 12.9 mg/l |
| 19 Apr 2024, 11:07 | 14 | 14 mg/l |
| 19 Mar 2024, 13:20 | 13 | 13 mg/l |
| 20 Feb 2024, 13:32 | 9.37 | 9.37 mg/l |
| 23 Jan 2024, 14:24 | 11.9 | 11.9 mg/l |
| 6 Dec 2023, 09:56 | 14 | 14 mg/l |
| 20 Nov 2023, 13:29 | 12 | 12 mg/l |
| 16 Oct 2023, 12:56 | 13 | 13 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.79 mg/l
Sampled 7 Sep 2026, 24 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:50 | 0.79 | 0.79 mg/l |
| 13 Aug 2026, 10:41 | 0.89 | 0.89 mg/l |
| 8 Jul 2026, 10:05 | 0.74 | 0.74 mg/l |
| 12 Jun 2026, 14:26 | 0.48 | 0.48 mg/l |
| 5 May 2026, 10:12 | 0.64 | 0.64 mg/l |
| 8 Apr 2026, 10:00 | 0.42 | 0.42 mg/l |
| 7 Mar 2025, 08:16 | 0.32 | 0.32 mg/l |
| 4 Feb 2025, 12:06 | 0.36 | 0.36 mg/l |
| 21 Jan 2025, 12:38 | 0.47 | 0.47 mg/l |
| 5 Dec 2024, 10:18 | 0.43 | 0.43 mg/l |
| 21 Nov 2024, 10:07 | 0.46 | 0.46 mg/l |
| 16 Oct 2024, 10:14 | 0.63 | 0.63 mg/l |
| 25 Sep 2024, 12:11 | 0.52 | 0.52 mg/l |
| 23 Aug 2024, 10:18 | 0.59 | 0.59 mg/l |
| 16 Jul 2024, 15:23 | 0.47 | 0.47 mg/l |
| 27 Jun 2024, 12:41 | 0.53 | 0.53 mg/l |
| 16 May 2024, 14:16 | 0.51 | 0.51 mg/l |
| 19 Apr 2024, 11:07 | 0.46 | 0.46 mg/l |
| 19 Mar 2024, 13:20 | 0.3 | 0.3 mg/l |
| 20 Feb 2024, 13:32 | 0.21 | 0.21 mg/l |
| 23 Jan 2024, 14:24 | 0.33 | 0.33 mg/l |
| 6 Dec 2023, 09:56 | 0.27 | 0.27 mg/l |
| 20 Nov 2023, 13:29 | 0.26 | 0.26 mg/l |
| 16 Oct 2023, 12:56 | 0.45 | 0.45 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1156 µS/cm
Sampled 7 Sep 2026, 24 days ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Sep 2026, 13:50 | 1156 | 1156 µS/cm |
| 13 Aug 2026, 10:41 | 1134 | 1134 µS/cm |
| 8 Jul 2026, 10:05 | 1150 | 1150 µS/cm |
| 12 Jun 2026, 14:26 | 834 | 834 µS/cm |
| 5 May 2026, 10:12 | 1079 | 1079 µS/cm |
| 8 Apr 2026, 10:00 | 1051 | 1051 µS/cm |
| 7 Mar 2025, 08:16 | 997 | 997 µS/cm |
| 4 Feb 2025, 12:06 | 1011 | 1011 µS/cm |
| 21 Jan 2025, 12:38 | 1068 | 1068 µS/cm |
| 5 Dec 2024, 10:18 | 996 | 996 µS/cm |
| 21 Nov 2024, 10:07 | 912 | 912 µS/cm |
| 16 Oct 2024, 10:14 | 1003 | 1003 µS/cm |
| 25 Sep 2024, 12:11 | 791 | 791 µS/cm |
| 23 Aug 2024, 10:18 | 1035 | 1035 µS/cm |
| 16 Jul 2024, 15:23 | 540 | 540 µS/cm |
| 27 Jun 2024, 12:41 | 1061 | 1061 µS/cm |
| 16 May 2024, 14:16 | 935 | 935 µS/cm |
| 19 Apr 2024, 11:07 | 961 | 961 µS/cm |
| 19 Mar 2024, 13:20 | 928 | 928 µS/cm |
| 20 Feb 2024, 13:32 | 744 | 744 µS/cm |
| 23 Jan 2024, 14:24 | 999 | 999 µS/cm |
| 6 Dec 2023, 09:56 | 894 | 894 µS/cm |
| 20 Nov 2023, 13:29 | 822 | 822 µS/cm |
| 16 Oct 2023, 12:56 | 1018 | 1018 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 | 24 | Oct 2023 – Sep 2026 | 82.3% 7 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 24 | Oct 2023 – Sep 2026 | 7.85 mg/l 7 Sep 2026 |
| Temperature of Water 0076 | River water | 24 | Oct 2023 – Sep 2026 | 17.5 °C 7 Sep 2026 |
| pH 0061 | River water | 24 | Oct 2023 – Sep 2026 | 7.87 7 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 23 | Oct 2023 – Sep 2026 | below 0.03 mg/l 7 Sep 2026 |
| Nitrate as N 0117 | River water | 24 | Oct 2023 – Sep 2026 | 16 mg/l 7 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 24 | Oct 2023 – Sep 2026 | 0.79 mg/l 7 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Oct 2023 – Sep 2026 | 1156 µS/cm 7 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 24 | Oct 2023 – Sep 2026 | 240 mg/l 7 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 23 | Oct 2023 – Sep 2026 | below 0.00071 mg/l 7 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 14 | Feb 2024 – Mar 2025 | below 3 mg/l 7 Mar 2025 |
| Nitrite as N 0118 | River water | 24 | Oct 2023 – Sep 2026 | 0.011 mg/l 7 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 24 | Oct 2023 – Sep 2026 | 16 mg/l 7 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.