Sandon Brook Little Baddow
EA name: SANDON BK.LT.BADDOW
Environment Agency sampling point AN-SB01 · 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
- 26 Jan 2026, 12:288 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
- 21 since 17 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 576140, 208332As published, to the nearest 1 m. Open in a map
- River, by its own name
- Sandon Brook
- River, by the map
- Sandon BrookPlaced on the river its name gives, 1 m from the line.
- Next gauge downstream
- None tracedIts water reaches the sea without passing a gauge.
- Nearest gauge upstream
- Sandon Bridge On the Sandon Brook · 3.5 km along the river
- Why it was sampled
- Monitoring (national agency policy) (20 samples)
Planned investigation (local monitoring) (1 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
93.8%
Sampled 26 Jan 2026, 8 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 Jan 2026, 12:28 | 93.8 | 93.8% |
| 1 Dec 2025, 10:57 | 85.6 | 85.6% |
| 25 Nov 2025, 09:46 | 87.4 | 87.4% |
| 3 Nov 2025, 12:13 | 77.2 | 77.2% |
| 20 Mar 2025, 07:54 | 92.1 | 92.1% |
| 24 Feb 2025, 09:27 | 95.8 | 95.8% |
| 31 Jan 2025, 12:58 | 98.2 | 98.2% |
| 11 Dec 2024, 10:43 | 91.1 | 91.1% |
| 21 Nov 2024, 10:37 | 91.5 | 91.5% |
| 18 Oct 2024, 14:38 | 85.2 | 85.2% |
| 26 Sep 2024, 08:30 | 80.3 | 80.3% |
| 29 Aug 2024, 13:00 | 83.1 | 83.1% |
| 16 Jul 2024, 14:08 | 80.5 | 80.5% |
| 20 Jun 2024, 11:25 | 86.9 | 86.9% |
| 16 May 2024, 13:32 | 94.9 | 94.9% |
| 17 Apr 2024, 13:30 | 109.4 | 109.4% |
| 20 Feb 2024, 10:38 | 92.2 | 92.2% |
| 4 Jan 2024, 13:33 | 85.6 | 85.6% |
| 14 Dec 2023, 10:15 | 87 | 87% |
| 28 Nov 2023, 09:16 | 89.2 | 89.2% |
| 17 Oct 2023, 11:03 | 87.1 | 87.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.7 mg/l
Sampled 26 Jan 2026, 8 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 Jan 2026, 12:28 | 11.7 | 11.7 mg/l |
| 1 Dec 2025, 10:57 | 10.4 | 10.4 mg/l |
| 25 Nov 2025, 09:46 | 10.9 | 10.9 mg/l |
| 3 Nov 2025, 12:13 | 8.58 | 8.58 mg/l |
| 20 Mar 2025, 07:54 | 11.1 | 11.1 mg/l |
| 24 Feb 2025, 09:27 | 11.1 | 11.1 mg/l |
| 31 Jan 2025, 12:58 | 12.3 | 12.3 mg/l |
| 11 Dec 2024, 10:43 | 11.1 | 11.1 mg/l |
| 21 Nov 2024, 10:37 | 11.9 | 11.9 mg/l |
| 18 Oct 2024, 14:38 | 8.92 | 8.92 mg/l |
| 26 Sep 2024, 08:30 | 8.16 | 8.16 mg/l |
| 29 Aug 2024, 13:00 | 7.98 | 7.98 mg/l |
| 16 Jul 2024, 14:08 | 7.74 | 7.74 mg/l |
| 20 Jun 2024, 11:25 | 8.89 | 8.89 mg/l |
| 16 May 2024, 13:32 | 9.73 | 9.73 mg/l |
| 17 Apr 2024, 13:30 | 12.4 | 12.4 mg/l |
| 20 Feb 2024, 10:38 | 10.8 | 10.8 mg/l |
| 4 Jan 2024, 13:33 | 10 | 10 mg/l |
| 14 Dec 2023, 10:15 | 10.6 | 10.6 mg/l |
| 28 Nov 2023, 09:16 | 10.9 | 10.9 mg/l |
| 17 Oct 2023, 11:03 | 9.47 | 9.47 mg/l |
Water temperature
code 0076 · °C
5.8 °C
Sampled 26 Jan 2026, 8 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 Jan 2026, 12:28 | 5.8 | 5.8 °C |
| 1 Dec 2025, 10:57 | 6.8 | 6.8 °C |
| 25 Nov 2025, 09:46 | 5.8 | 5.8 °C |
| 3 Nov 2025, 12:13 | 10.6 | 10.6 °C |
| 20 Mar 2025, 07:54 | 7.1 | 7.1 °C |
| 24 Feb 2025, 09:27 | 8.7 | 8.7 °C |
| 31 Jan 2025, 12:58 | 5.8 | 5.8 °C |
| 11 Dec 2024, 10:43 | 6.9 | 6.9 °C |
| 21 Nov 2024, 10:37 | 4.2 | 4.2 °C |
| 18 Oct 2024, 14:38 | 13.2 | 13.2 °C |
| 26 Sep 2024, 08:30 | 14.5 | 14.5 °C |
| 29 Aug 2024, 13:00 | 17.2 | 17.2 °C |
| 16 Jul 2024, 14:08 | 17.1 | 17.1 °C |
| 20 Jun 2024, 11:25 | 14.2 | 14.2 °C |
| 16 May 2024, 13:32 | 14.1 | 14.1 °C |
| 17 Apr 2024, 13:30 | 9.9 | 9.9 °C |
| 20 Feb 2024, 10:38 | 8.4 | 8.4 °C |
| 4 Jan 2024, 13:33 | 8.3 | 8.3 °C |
| 14 Dec 2023, 10:15 | 6.7 | 6.7 °C |
| 28 Nov 2023, 09:16 | 6.6 | 6.6 °C |
| 17 Oct 2023, 11:03 | 11.5 | 11.5 °C |
pH
code 0061
7.96
Sampled 26 Jan 2026, 8 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 Jan 2026, 12:28 | 7.96 | 7.96 |
| 1 Dec 2025, 10:57 | 7.78 | 7.78 |
| 25 Nov 2025, 09:46 | 7.79 | 7.79 |
| 3 Nov 2025, 12:13 | 7.63 | 7.63 |
| 20 Mar 2025, 07:54 | 8.1 | 8.1 |
| 24 Feb 2025, 09:27 | 7.91 | 7.91 |
| 31 Jan 2025, 12:58 | 8.03 | 8.03 |
| 11 Dec 2024, 10:43 | 7.84 | 7.84 |
| 21 Nov 2024, 10:37 | 7.82 | 7.82 |
| 18 Oct 2024, 14:38 | 7.7 | 7.7 |
| 26 Sep 2024, 08:30 | 7.69 | 7.69 |
| 29 Aug 2024, 13:00 | 7.75 | 7.75 |
| 16 Jul 2024, 14:08 | 7.94 | 7.94 |
| 20 Jun 2024, 11:25 | 7.91 | 7.91 |
| 16 May 2024, 13:32 | 7.96 | 7.96 |
| 17 Apr 2024, 13:30 | 8.21 | 8.21 |
| 20 Feb 2024, 10:38 | 7.91 | 7.91 |
| 4 Jan 2024, 13:33 | 7.85 | 7.85 |
| 14 Dec 2023, 10:15 | 7.71 | 7.71 |
| 28 Nov 2023, 09:16 | 7.86 | 7.86 |
| 17 Oct 2023, 11:03 | 7.83 | 7.83 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 26 Jan 2026, 8 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 Jan 2026, 12:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Dec 2025, 10:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 25 Nov 2025, 09:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Nov 2025, 12:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Mar 2025, 07:54 | <0.03 | below 0.03 mg/l (not detected above this) |
| 24 Feb 2025, 09:27 | 0.032 | 0.032 mg/l |
| 31 Jan 2025, 12:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Dec 2024, 10:43 | 0.044 | 0.044 mg/l |
| 21 Nov 2024, 10:37 | 0.041 | 0.041 mg/l |
| 18 Oct 2024, 14:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 26 Sep 2024, 08:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Aug 2024, 13:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Jul 2024, 14:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Jun 2024, 11:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 May 2024, 13:32 | 0.031 | 0.031 mg/l |
| 17 Apr 2024, 13:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Feb 2024, 10:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Jan 2024, 13:33 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Dec 2023, 10:15 | 0.033 | 0.033 mg/l |
| 28 Nov 2023, 09:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Oct 2023, 11:03 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
14 mg/l
Sampled 26 Jan 2026, 8 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 Jan 2026, 12:28 | 14 | 14 mg/l |
| 1 Dec 2025, 10:57 | 3.29 | 3.29 mg/l |
| 25 Nov 2025, 09:46 | 6.77 | 6.77 mg/l |
| 3 Nov 2025, 12:13 | 0.996 | 0.996 mg/l |
| 20 Mar 2025, 07:54 | 6.09 | 6.09 mg/l |
| 24 Feb 2025, 09:27 | 8.87 | 8.87 mg/l |
| 31 Jan 2025, 12:58 | 13 | 13 mg/l |
| 11 Dec 2024, 10:43 | 12 | 12 mg/l |
| 21 Nov 2024, 10:37 | 8.96 | 8.96 mg/l |
| 18 Oct 2024, 14:38 | 8.07 | 8.07 mg/l |
| 26 Sep 2024, 08:30 | 1.5 | 1.5 mg/l |
| 29 Aug 2024, 13:00 | 1.9 | 1.9 mg/l |
| 16 Jul 2024, 14:08 | 1.99 | 1.99 mg/l |
| 20 Jun 2024, 11:25 | 3.29 | 3.29 mg/l |
| 16 May 2024, 13:32 | 3.99 | 3.99 mg/l |
| 17 Apr 2024, 13:30 | 4.59 | 4.59 mg/l |
| 20 Feb 2024, 10:38 | 7.98 | 7.98 mg/l |
| 4 Jan 2024, 13:33 | 8.78 | 8.78 mg/l |
| 14 Dec 2023, 10:15 | 11 | 11 mg/l |
| 28 Nov 2023, 09:16 | 13 | 13 mg/l |
| 17 Oct 2023, 11:03 | 2.49 | 2.49 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.12 mg/l
Sampled 26 Jan 2026, 8 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 Jan 2026, 12:28 | 0.12 | 0.12 mg/l |
| 1 Dec 2025, 10:57 | 0.23 | 0.23 mg/l |
| 25 Nov 2025, 09:46 | 0.21 | 0.21 mg/l |
| 3 Nov 2025, 12:13 | 0.32 | 0.32 mg/l |
| 20 Mar 2025, 07:54 | 0.062 | 0.062 mg/l |
| 24 Feb 2025, 09:27 | 0.13 | 0.13 mg/l |
| 31 Jan 2025, 12:58 | 0.13 | 0.13 mg/l |
| 11 Dec 2024, 10:43 | 0.14 | 0.14 mg/l |
| 21 Nov 2024, 10:37 | 0.24 | 0.24 mg/l |
| 18 Oct 2024, 14:38 | 0.22 | 0.22 mg/l |
| 26 Sep 2024, 08:30 | 0.25 | 0.25 mg/l |
| 29 Aug 2024, 13:00 | 0.25 | 0.25 mg/l |
| 16 Jul 2024, 14:08 | 0.23 | 0.23 mg/l |
| 20 Jun 2024, 11:25 | 0.26 | 0.26 mg/l |
| 16 May 2024, 13:32 | 0.17 | 0.17 mg/l |
| 17 Apr 2024, 13:30 | 0.08 | 0.08 mg/l |
| 20 Feb 2024, 10:38 | 0.12 | 0.12 mg/l |
| 4 Jan 2024, 13:33 | 0.14 | 0.14 mg/l |
| 14 Dec 2023, 10:15 | 0.14 | 0.14 mg/l |
| 28 Nov 2023, 09:16 | 0.16 | 0.16 mg/l |
| 17 Oct 2023, 11:03 | 0.49 | 0.49 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
810 µS/cm
Sampled 26 Jan 2026, 8 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 26 Jan 2026, 12:28 | 810 | 810 µS/cm |
| 1 Dec 2025, 10:57 | 866 | 866 µS/cm |
| 25 Nov 2025, 09:46 | 892 | 892 µS/cm |
| 3 Nov 2025, 12:13 | 781 | 781 µS/cm |
| 20 Mar 2025, 07:54 | 916 | 916 µS/cm |
| 24 Feb 2025, 09:27 | 859 | 859 µS/cm |
| 31 Jan 2025, 12:58 | 852 | 852 µS/cm |
| 11 Dec 2024, 10:43 | 847 | 847 µS/cm |
| 21 Nov 2024, 10:37 | 726 | 726 µS/cm |
| 18 Oct 2024, 14:38 | 716 | 716 µS/cm |
| 26 Sep 2024, 08:30 | 778 | 778 µS/cm |
| 29 Aug 2024, 13:00 | 783 | 783 µS/cm |
| 16 Jul 2024, 14:08 | 577 | 577 µS/cm |
| 20 Jun 2024, 11:25 | 680 | 680 µS/cm |
| 16 May 2024, 13:32 | 793 | 793 µS/cm |
| 17 Apr 2024, 13:30 | 837 | 837 µS/cm |
| 20 Feb 2024, 10:38 | 653 | 653 µS/cm |
| 4 Jan 2024, 13:33 | 581 | 581 µS/cm |
| 14 Dec 2023, 10:15 | 585 | 585 µS/cm |
| 28 Nov 2023, 09:16 | 615 | 615 µS/cm |
| 17 Oct 2023, 11:03 | 837 | 837 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 | 21 | Oct 2023 – Jan 2026 | 93.8% 26 Jan 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 21 | Oct 2023 – Jan 2026 | 11.7 mg/l 26 Jan 2026 |
| Temperature of Water 0076 | River water | 21 | Oct 2023 – Jan 2026 | 5.8 °C 26 Jan 2026 |
| pH 0061 | River water | 21 | Oct 2023 – Jan 2026 | 7.96 26 Jan 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 21 | Oct 2023 – Jan 2026 | below 0.03 mg/l 26 Jan 2026 |
| Nitrate as N 0117 | River water | 21 | Oct 2023 – Jan 2026 | 14 mg/l 26 Jan 2026 |
| Orthophosphate, reactive as P 0180 | River water | 21 | Oct 2023 – Jan 2026 | 0.12 mg/l 26 Jan 2026 |
| Conductivity at 25 C 0077 | River water | 21 | Oct 2023 – Jan 2026 | 810 µS/cm 26 Jan 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 21 | Oct 2023 – Jan 2026 | 160 mg/l 26 Jan 2026 |
| Ammonia un-ionised as N 0119 | River water | 21 | Oct 2023 – Jan 2026 | below 0.00037 mg/l 26 Jan 2026 |
| BOD : 5 Day ATU 0085 | River water | 17 | Feb 2024 – Jan 2026 | 1.2 mg/l 26 Jan 2026 |
| Nitrite as N 0118 | River water | 21 | Oct 2023 – Jan 2026 | 0.025 mg/l 26 Jan 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 21 | Oct 2023 – Jan 2026 | 14 mg/l 26 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.