Little Ouse River Santon Downham Road Bridge
EA name: LT.OUSE R. SANTON DOWNHAM RD.BR.
Environment Agency sampling point AN-45M03 · 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 Mar 2025, 09:1019 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 8 Oct 2026 and had nothing newer.
- Samples banked
- 18 since 2 Oct 2023 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Planned investigation (local monitoring)
- Where
- National Grid 581748, 287851As published, to the nearest 1 m. Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- Little Ouse RiverPlaced by position alone, on a line whose map name differs from its own, 2 m from the line.
- Next gauge downstream
- Little Ouse On the River Little Ouse · 10 km along the river (the path rests on a repair to the map)
- Nearest gauge upstream
- Abbey Heath On the River Little Ouse · 6.5 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (18 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
92.7%
Sampled 17 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 09:10 | 92.7 | 92.7% |
| 6 Feb 2025, 15:19 | 96.4 | 96.4% |
| 7 Jan 2025, 12:49 | 91.4 | 91.4% |
| 9 Dec 2024, 14:29 | 87.4 | 87.4% |
| 7 Nov 2024, 11:36 | 79.3 | 79.3% |
| 10 Oct 2024, 13:05 | 86.7 | 86.7% |
| 4 Sep 2024, 11:26 | 76.3 | 76.3% |
| 9 Aug 2024, 13:02 | 95.4 | 95.4% |
| 4 Jul 2024, 14:06 | 112.9 | 112.9% |
| 6 Jun 2024, 11:54 | 97 | 97% |
| 1 Mar 2024, 12:18 | 90.4 | 90.4% |
| 6 Feb 2024, 09:50 | 93.8 | 93.8% |
| 10 Jan 2024, 12:09 | 88.9 | 88.9% |
| 5 Dec 2023, 12:17 | 89.9 | 89.9% |
| 8 Nov 2023, 10:15 | 77.6 | 77.6% |
| 2 Oct 2023, 12:17 | 76.5 | 76.5% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.2 mg/l
Sampled 17 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 09:10 | 11.2 | 11.2 mg/l |
| 6 Feb 2025, 15:19 | 12 | 12 mg/l |
| 7 Jan 2025, 12:49 | 11.4 | 11.4 mg/l |
| 9 Dec 2024, 14:29 | 10.5 | 10.5 mg/l |
| 7 Nov 2024, 11:36 | 8.63 | 8.63 mg/l |
| 10 Oct 2024, 13:05 | 9.22 | 9.22 mg/l |
| 4 Sep 2024, 11:26 | 7.5 | 7.5 mg/l |
| 9 Aug 2024, 13:02 | 8.97 | 8.97 mg/l |
| 4 Jul 2024, 14:06 | 11.3 | 11.3 mg/l |
| 6 Jun 2024, 11:54 | 9.95 | 9.95 mg/l |
| 1 Mar 2024, 12:18 | 10.7 | 10.7 mg/l |
| 6 Feb 2024, 09:50 | 10.6 | 10.6 mg/l |
| 10 Jan 2024, 12:09 | 12 | 12 mg/l |
| 5 Dec 2023, 12:17 | 11.3 | 11.3 mg/l |
| 8 Nov 2023, 10:15 | 9.06 | 9.06 mg/l |
| 2 Oct 2023, 12:17 | 7.66 | 7.66 mg/l |
Water temperature
code 0076 · °C
7 °C
Sampled 17 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 09:10 | 7 | 7 °C |
| 6 Feb 2025, 15:19 | 6 | 6 °C |
| 7 Jan 2025, 12:49 | 5.9 | 5.9 °C |
| 9 Dec 2024, 14:29 | 7.5 | 7.5 °C |
| 7 Nov 2024, 11:36 | 11.5 | 11.5 °C |
| 10 Oct 2024, 13:05 | 12.5 | 12.5 °C |
| 4 Sep 2024, 11:26 | 16.1 | 16.1 °C |
| 9 Aug 2024, 13:02 | 18.2 | 18.2 °C |
| 4 Jul 2024, 14:06 | 15.4 | 15.4 °C |
| 6 Jun 2024, 11:54 | 14.1 | 14.1 °C |
| 1 Mar 2024, 12:18 | 8 | 8 °C |
| 6 Feb 2024, 09:50 | 9.7 | 9.7 °C |
| 10 Jan 2024, 12:09 | 2.7 | 2.7 °C |
| 5 Dec 2023, 12:17 | 5.7 | 5.7 °C |
| 8 Nov 2023, 10:15 | 8.5 | 8.5 °C |
| 2 Oct 2023, 12:17 | 15.2 | 15.2 °C |
pH
code 0061
7.98
Sampled 17 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 09:10 | 7.98 | 7.98 |
| 6 Feb 2025, 15:19 | 7.9 | 7.9 |
| 7 Jan 2025, 12:49 | 8.19 | 8.19 |
| 9 Dec 2024, 14:29 | 7.97 | 7.97 |
| 7 Nov 2024, 11:36 | 7.75 | 7.75 |
| 10 Oct 2024, 13:05 | 7.83 | 7.83 |
| 4 Sep 2024, 11:26 | 7.74 | 7.74 |
| 9 Aug 2024, 13:02 | 8.23 | 8.23 |
| 4 Jul 2024, 14:06 | 8.03 | 8.03 |
| 6 Jun 2024, 11:54 | 7.97 | 7.97 |
| 1 Mar 2024, 12:18 | 7.87 | 7.87 |
| 6 Feb 2024, 09:50 | 7.78 | 7.78 |
| 10 Jan 2024, 12:09 | 7.95 | 7.95 |
| 5 Dec 2023, 12:17 | 7.78 | 7.78 |
| 8 Nov 2023, 10:15 | 7.73 | 7.73 |
| 2 Oct 2023, 12:17 | 7.72 | 7.72 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.08 mg/l
Sampled 17 Mar 2025, 19 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 09:10 | 0.08 | 0.08 mg/l |
| 6 Feb 2025, 15:19 | 0.053 | 0.053 mg/l |
| 7 Jan 2025, 12:49 | 0.081 | 0.081 mg/l |
| 9 Dec 2024, 14:29 | 0.076 | 0.076 mg/l |
| 7 Nov 2024, 11:36 | 0.14 | 0.14 mg/l |
| 10 Oct 2024, 13:05 | 0.037 | 0.037 mg/l |
| 4 Sep 2024, 11:26 | 0.049 | 0.049 mg/l |
| 9 Aug 2024, 13:02 | 0.034 | 0.034 mg/l |
| 4 Jul 2024, 14:06 | 0.031 | 0.031 mg/l |
| 6 Jun 2024, 11:54 | 0.037 | 0.037 mg/l |
| 1 Mar 2024, 12:18 | 0.058 | 0.058 mg/l |
| 10 Jan 2024, 12:09 | 0.041 | 0.041 mg/l |
| 5 Dec 2023, 12:17 | 0.06 | 0.06 mg/l |
| 8 Nov 2023, 10:15 | 0.032 | 0.032 mg/l |
| 2 Oct 2023, 12:17 | 0.037 | 0.037 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
9.36 mg/l
Sampled 17 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 09:10 | 9.36 | 9.36 mg/l |
| 6 Feb 2025, 15:19 | 11 | 11 mg/l |
| 7 Jan 2025, 12:49 | 9.54 | 9.54 mg/l |
| 9 Dec 2024, 14:29 | 9.05 | 9.05 mg/l |
| 7 Nov 2024, 11:36 | 9.29 | 9.29 mg/l |
| 10 Oct 2024, 13:05 | 7.66 | 7.66 mg/l |
| 4 Sep 2024, 11:26 | 8.92 | 8.92 mg/l |
| 9 Aug 2024, 13:02 | 9.53 | 9.53 mg/l |
| 4 Jul 2024, 14:06 | 9.25 | 9.25 mg/l |
| 6 Jun 2024, 11:54 | 7.36 | 7.36 mg/l |
| 1 Mar 2024, 12:18 | 7.07 | 7.07 mg/l |
| 6 Feb 2024, 09:50 | 8.76 | 8.76 mg/l |
| 10 Jan 2024, 12:09 | 7.07 | 7.07 mg/l |
| 5 Dec 2023, 12:17 | 8.36 | 8.36 mg/l |
| 8 Nov 2023, 10:15 | 6.65 | 6.65 mg/l |
| 2 Oct 2023, 12:17 | 7.53 | 7.53 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.044 mg/l
Sampled 17 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 09:10 | 0.044 | 0.044 mg/l |
| 6 Feb 2025, 15:19 | 0.066 | 0.066 mg/l |
| 7 Jan 2025, 12:49 | 0.08 | 0.08 mg/l |
| 9 Dec 2024, 14:29 | 0.12 | 0.12 mg/l |
| 7 Nov 2024, 11:36 | 0.084 | 0.084 mg/l |
| 10 Oct 2024, 13:05 | 0.094 | 0.094 mg/l |
| 4 Sep 2024, 11:26 | 0.087 | 0.087 mg/l |
| 9 Aug 2024, 13:02 | 0.081 | 0.081 mg/l |
| 4 Jul 2024, 14:06 | 0.064 | 0.064 mg/l |
| 6 Jun 2024, 11:54 | 0.068 | 0.068 mg/l |
| 1 Mar 2024, 12:18 | 0.067 | 0.067 mg/l |
| 6 Feb 2024, 09:50 | 0.088 | 0.088 mg/l |
| 10 Jan 2024, 12:09 | 0.094 | 0.094 mg/l |
| 5 Dec 2023, 12:17 | 0.076 | 0.076 mg/l |
| 8 Nov 2023, 10:15 | 0.099 | 0.099 mg/l |
| 2 Oct 2023, 12:17 | 0.11 | 0.11 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
834 µS/cm
Sampled 17 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Mar 2025, 09:10 | 834 | 834 µS/cm |
| 6 Feb 2025, 15:19 | 853 | 853 µS/cm |
| 7 Jan 2025, 12:49 | 867 | 867 µS/cm |
| 9 Dec 2024, 14:29 | 750 | 750 µS/cm |
| 7 Nov 2024, 11:36 | 889 | 889 µS/cm |
| 10 Oct 2024, 13:05 | 847 | 847 µS/cm |
| 4 Sep 2024, 11:26 | 860 | 860 µS/cm |
| 9 Aug 2024, 13:02 | 905 | 905 µS/cm |
| 4 Jul 2024, 14:06 | 829 | 829 µS/cm |
| 6 Jun 2024, 11:54 | 824 | 824 µS/cm |
| 1 Mar 2024, 12:18 | 774 | 774 µS/cm |
| 6 Feb 2024, 09:50 | 850 | 850 µS/cm |
| 10 Jan 2024, 12:09 | 709 | 709 µS/cm |
| 5 Dec 2023, 12:17 | 878 | 878 µS/cm |
| 8 Nov 2023, 10:15 | 701 | 701 µS/cm |
| 2 Oct 2023, 12:17 | 864 | 864 µS/cm |
E. coli
confirmed, membrane filtration · code 2348 · per 100 ml
540 per 100 ml
Sampled 8 May 2024, 2.4 years ago · 2 results banked
Every result (2)
| Sampled | Result as published | Reads as |
|---|---|---|
| 8 May 2024, 12:43 | 540 | 540 per 100 ml |
| 4 Apr 2024, 12:25 | 5100 | 5100 per 100 ml |
Everything measured here
17 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 17 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 16 | Oct 2023 – Mar 2025 | 92.7% 17 Mar 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 16 | Oct 2023 – Mar 2025 | 11.2 mg/l 17 Mar 2025 |
| Temperature of Water 0076 | River water | 16 | Oct 2023 – Mar 2025 | 7 °C 17 Mar 2025 |
| pH 0061 | River water | 16 | Oct 2023 – Mar 2025 | 7.98 17 Mar 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 15 | Oct 2023 – Mar 2025 | 0.08 mg/l 17 Mar 2025 |
| Nitrate as N 0117 | River water | 16 | Oct 2023 – Mar 2025 | 9.36 mg/l 17 Mar 2025 |
| Orthophosphate, reactive as P 0180 | River water | 16 | Oct 2023 – Mar 2025 | 0.044 mg/l 17 Mar 2025 |
| Conductivity at 25 C 0077 | River water | 16 | Oct 2023 – Mar 2025 | 834 µS/cm 17 Mar 2025 |
| Escherichia coli : Confirmed : MF 2348 | River water | 2 | Apr 2024 – May 2024 | 540 per 100 ml 8 May 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 16 | Oct 2023 – Mar 2025 | 270 mg/l 17 Mar 2025 |
| Ammonia un-ionised as N 0119 | River water | 15 | Oct 2023 – Mar 2025 | 0.00112 mg/l 17 Mar 2025 |
| Enterococci: Intestinal: Confirmed: MF 3723 | River water | 2 | Apr 2024 – May 2024 | 45 colony forming units / 100ml 8 May 2024 |
| Enterococci: Intestinal: Presumptive: MF 3722 | River water | 2 | Apr 2024 – May 2024 | 45 colony forming units / 100ml 8 May 2024 |
| MST Filtration 4926 | River water | 2 | Apr 2024 – May 2024 | DNA Stored 8 May 2024 |
| Nitrite as N 0118 | River water | 16 | Oct 2023 – Mar 2025 | 0.04 mg/l 17 Mar 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 16 | Oct 2023 – Mar 2025 | 9.4 mg/l 17 Mar 2025 |
| Volume of Sample Filtered 4865 | River water | 2 | Apr 2024 – May 2024 | 1000 millilitre 8 May 2024 |
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.