Foulness at Sandholme
EA name: FOULNESS AT SANDHOLME (also listed as “RSN1128 RIVER FOULNESS AT SANDHOLME”)
Environment Agency sampling point NE-RSN1128 · 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 Dec 2024, 11:3622 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
- 12 since 11 Jan 2024 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 482503, 432488As published, to the nearest 1 m. Open in a map
- River, by its own name
- Foulness
- River, by the map
- River FoulnessPlaced on the river its name gives, 2 m from the line.
- Next gauge downstream
- None tracedThe map stops before any gauge.
- Nearest gauge upstream
- Welham Bridge On the River Foulness · 4.3 km along the river
- Why it was sampled
- Monitoring (national agency policy) (12 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
74.1%
Sampled 17 Dec 2024, 22 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2024, 11:36 | 74.1 | 74.1% |
| 8 Nov 2024, 12:50 | 67.1 | 67.1% |
| 3 Oct 2024, 14:30 | 61.8 | 61.8% |
| 3 Sep 2024, 11:56 | 45.4 | 45.4% |
| 1 Aug 2024, 11:18 | 68.5 | 68.5% |
| 18 Jul 2024, 08:46 | 79.8 | 79.8% |
| 28 Jun 2024, 11:32 | 98.4 | 98.4% |
| 15 May 2024, 10:39 | 44 | 44% |
| 5 Apr 2024, 11:34 | 82.3 | 82.3% |
| 13 Mar 2024, 10:10 | 94.3 | 94.3% |
| 2 Feb 2024, 11:01 | 79 | 79% |
| 11 Jan 2024, 12:00 | 71.1 | 71.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.76 mg/l
Sampled 17 Dec 2024, 22 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2024, 11:36 | 8.76 | 8.76 mg/l |
| 8 Nov 2024, 12:50 | 7.41 | 7.41 mg/l |
| 3 Oct 2024, 14:30 | 6.54 | 6.54 mg/l |
| 3 Sep 2024, 11:56 | 4.35 | 4.35 mg/l |
| 1 Aug 2024, 11:18 | 6.06 | 6.06 mg/l |
| 18 Jul 2024, 08:46 | 7.48 | 7.48 mg/l |
| 28 Jun 2024, 11:32 | 9.29 | 9.29 mg/l |
| 15 May 2024, 10:39 | 4.38 | 4.38 mg/l |
| 5 Apr 2024, 11:34 | 9.18 | 9.18 mg/l |
| 13 Mar 2024, 10:10 | 10.3 | 10.3 mg/l |
| 2 Feb 2024, 11:01 | 9.72 | 9.72 mg/l |
| 11 Jan 2024, 12:00 | 8.93 | 8.93 mg/l |
Water temperature
code 0076 · °C
8 °C
Sampled 17 Dec 2024, 22 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2024, 11:36 | 8 | 8 °C |
| 8 Nov 2024, 12:50 | 10.8 | 10.8 °C |
| 3 Oct 2024, 14:30 | 12.7 | 12.7 °C |
| 3 Sep 2024, 11:56 | 17.3 | 17.3 °C |
| 1 Aug 2024, 11:18 | 21.2 | 21.2 °C |
| 18 Jul 2024, 08:46 | 18.3 | 18.3 °C |
| 28 Jun 2024, 11:32 | 18 | 18 °C |
| 15 May 2024, 10:39 | 15.5 | 15.5 °C |
| 5 Apr 2024, 11:34 | 10.4 | 10.4 °C |
| 13 Mar 2024, 10:10 | 11.3 | 11.3 °C |
| 2 Feb 2024, 11:01 | 6.4 | 6.4 °C |
| 11 Jan 2024, 12:00 | 5.6 | 5.6 °C |
pH
code 0061
7.44
Sampled 17 Dec 2024, 22 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2024, 11:36 | 7.44 | 7.44 |
| 8 Nov 2024, 12:50 | 8.03 | 8.03 |
| 3 Oct 2024, 14:30 | 7.44 | 7.44 |
| 3 Sep 2024, 11:56 | 7.48 | 7.48 |
| 1 Aug 2024, 11:18 | 7.43 | 7.43 |
| 18 Jul 2024, 08:46 | 7.59 | 7.59 |
| 28 Jun 2024, 11:32 | 7.93 | 7.93 |
| 15 May 2024, 10:39 | 7.44 | 7.44 |
| 5 Apr 2024, 11:34 | 7.66 | 7.66 |
| 13 Mar 2024, 10:10 | 7.75 | 7.75 |
| 2 Feb 2024, 11:01 | 7.53 | 7.53 |
| 11 Jan 2024, 12:00 | 7.42 | 7.42 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.38 mg/l
Sampled 17 Dec 2024, 22 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2024, 11:36 | 0.38 | 0.38 mg/l |
| 8 Nov 2024, 12:50 | 0.11 | 0.11 mg/l |
| 3 Oct 2024, 14:30 | 0.24 | 0.24 mg/l |
| 3 Sep 2024, 11:56 | 0.3 | 0.3 mg/l |
| 1 Aug 2024, 11:18 | 0.096 | 0.096 mg/l |
| 18 Jul 2024, 08:46 | 0.03 | 0.03 mg/l |
| 28 Jun 2024, 11:32 | 0.032 | 0.032 mg/l |
| 15 May 2024, 10:39 | 0.1 | 0.1 mg/l |
| 5 Apr 2024, 11:34 | 0.59 | 0.59 mg/l |
| 13 Mar 2024, 10:10 | 0.32 | 0.32 mg/l |
| 2 Feb 2024, 11:01 | 0.27 | 0.27 mg/l |
| 11 Jan 2024, 12:00 | 0.32 | 0.32 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
11.9 mg/l
Sampled 17 Dec 2024, 22 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2024, 11:36 | 11.9 | 11.9 mg/l |
| 8 Nov 2024, 12:50 | 5.14 | 5.14 mg/l |
| 3 Oct 2024, 14:30 | 27.8 | 27.8 mg/l |
| 3 Sep 2024, 11:56 | 0.362 | 0.362 mg/l |
| 1 Aug 2024, 11:18 | 1.48 | 1.48 mg/l |
| 18 Jul 2024, 08:46 | 3.14 | 3.14 mg/l |
| 28 Jun 2024, 11:32 | 4.06 | 4.06 mg/l |
| 15 May 2024, 10:39 | 2.22 | 2.22 mg/l |
| 5 Apr 2024, 11:34 | 5.53 | 5.53 mg/l |
| 13 Mar 2024, 10:10 | 7.13 | 7.13 mg/l |
| 2 Feb 2024, 11:01 | 8.63 | 8.63 mg/l |
| 11 Jan 2024, 12:00 | 8.94 | 8.94 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.051 mg/l
Sampled 17 Dec 2024, 22 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2024, 11:36 | 0.051 | 0.051 mg/l |
| 8 Nov 2024, 12:50 | 0.053 | 0.053 mg/l |
| 3 Oct 2024, 14:30 | 0.092 | 0.092 mg/l |
| 3 Sep 2024, 11:56 | 0.025 | 0.025 mg/l |
| 1 Aug 2024, 11:18 | 0.028 | 0.028 mg/l |
| 18 Jul 2024, 08:46 | 0.043 | 0.043 mg/l |
| 28 Jun 2024, 11:32 | 0.029 | 0.029 mg/l |
| 15 May 2024, 10:39 | 0.078 | 0.078 mg/l |
| 5 Apr 2024, 11:34 | 0.015 | 0.015 mg/l |
| 13 Mar 2024, 10:10 | 0.01 | 0.01 mg/l |
| 2 Feb 2024, 11:01 | 0.012 | 0.012 mg/l |
| 11 Jan 2024, 12:00 | 0.016 | 0.016 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
1104 µS/cm
Sampled 17 Dec 2024, 22 months ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 17 Dec 2024, 11:36 | 1104 | 1104 µS/cm |
| 8 Nov 2024, 12:50 | 1397 | 1397 µS/cm |
| 3 Oct 2024, 14:30 | 934 | 934 µS/cm |
| 3 Sep 2024, 11:56 | 1478 | 1478 µS/cm |
| 1 Aug 2024, 11:18 | 1583 | 1583 µS/cm |
| 18 Jul 2024, 08:46 | 1296 | 1296 µS/cm |
| 28 Jun 2024, 11:32 | 1305 | 1305 µS/cm |
| 15 May 2024, 10:39 | 1176 | 1176 µS/cm |
| 5 Apr 2024, 11:34 | 675 | 675 µS/cm |
| 13 Mar 2024, 10:10 | 874 | 874 µS/cm |
| 2 Feb 2024, 11:01 | 872 | 872 µS/cm |
| 11 Jan 2024, 12:00 | 856 | 856 µS/cm |
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 | 12 | Jan 2024 – Dec 2024 | 74.1% 17 Dec 2024 |
| Oxygen, Dissolved as O2 9924 | River water | 12 | Jan 2024 – Dec 2024 | 8.76 mg/l 17 Dec 2024 |
| Temperature of Water 0076 | River water | 12 | Jan 2024 – Dec 2024 | 8 °C 17 Dec 2024 |
| pH 0061 | River water | 12 | Jan 2024 – Dec 2024 | 7.44 17 Dec 2024 |
| Ammoniacal Nitrogen as N 0111 | River water | 12 | Jan 2024 – Dec 2024 | 0.38 mg/l 17 Dec 2024 |
| Nitrate as N 0117 | River water | 12 | Jan 2024 – Dec 2024 | 11.9 mg/l 17 Dec 2024 |
| Orthophosphate, reactive as P 0180 | River water | 12 | Jan 2024 – Dec 2024 | 0.051 mg/l 17 Dec 2024 |
| Conductivity at 25 C 0077 | River water | 12 | Jan 2024 – Dec 2024 | 1104 µS/cm 17 Dec 2024 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 12 | Jan 2024 – Dec 2024 | 230 mg/l 17 Dec 2024 |
| Ammonia un-ionised as N 0119 | River water | 12 | Jan 2024 – Dec 2024 | 0.00167 mg/l 17 Dec 2024 |
| Carbon, Organic, Dissolved as C :- {DOC} 0301 | River water | 12 | Jan 2024 – Dec 2024 | 9.8 mg/l 17 Dec 2024 |
| Chloride 0172 | River water | 11 | Jan 2024 – Nov 2024 | 80 mg/l 8 Nov 2024 |
| Flow Type 2896 | River water | 6 | Jul 2024 – Dec 2024 | Moderate Flow 17 Dec 2024 |
| Nitrite as N 0118 | River water | 12 | Jan 2024 – Dec 2024 | 0.12 mg/l 17 Dec 2024 |
| Nitrogen, Total Oxidised as N 0116 | River water | 12 | Jan 2024 – Dec 2024 | 12 mg/l 17 Dec 2024 |
| Phosphorus, Total as P 0348 | River water | 12 | Jan 2024 – Dec 2024 | 0.092 mg/l 17 Dec 2024 |
| Silica, reactive as SiO2 0182 | River water | 12 | Jan 2024 – Dec 2024 | 11 mg/l 17 Dec 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.