River Wensum Great Ryburgh Bridge
EA name: R.WENSUM GREAT RYBURGH BRIDGE
Environment Agency sampling point AN-WEN070 · 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
- 11 Sep 2026, 12:0120 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 25 since 18 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- Pond / lake / reservoir water Planned investigation (local monitoring)
- Where
- National Grid 596400, 327400As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Wensum
- River, by the map
- River WensumPlaced on the river its name gives, 43 m from the line.
- Next gauge downstream
- Swanton Morley On the River Wensum · 16 km along the river
- Nearest gauge upstream
- Fakenham On the River Wensum · 6.0 km along the river
- Why it was sampled
- Planned investigation (national agency policy) (17 samples)
Planned investigation (local monitoring) (8 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
98.9%
Sampled 6 Mar 2025, 19 months ago · 19 results banked
Also measured in percentage on another sample material (2GZZ): 6 results, kept apart (see the table).
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2025, 10:30 | 98.9 | 98.9% |
| 5 Feb 2025, 10:37 | 93.8 | 93.8% |
| 22 Jan 2025, 11:50 | 92.9 | 92.9% |
| 2 Dec 2024, 13:17 | 86.9 | 86.9% |
| 1 Nov 2024, 11:00 | 84.1 | 84.1% |
| 4 Oct 2024, 13:37 | 82.9 | 82.9% |
| 9 Sep 2024, 10:15 | 65.1 | 65.1% |
| 1 Aug 2024, 16:35 | 89.7 | 89.7% |
| 8 Jul 2024, 14:22 | 92.2 | 92.2% |
| 3 Jun 2024, 15:38 | 93.4 | 93.4% |
| 19 Apr 2024, 11:34 | 93.8 | 93.8% |
| 15 Apr 2024, 14:13 | 100.8 | 100.8% |
| 1 Mar 2024, 10:44 | 90 | 90% |
| 2 Feb 2024, 09:44 | 91.6 | 91.6% |
| 23 Jan 2024, 11:01 | 87.1 | 87.1% |
| 10 Jan 2024, 11:50 | 89.3 | 89.3% |
| 4 Dec 2023, 09:20 | 84.3 | 84.3% |
| 2 Nov 2023, 09:56 | 78.9 | 78.9% |
| 18 Oct 2023, 10:18 | 90.2 | 90.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
12 mg/l
Sampled 6 Mar 2025, 19 months ago · 19 results banked
Also measured in milligram per litre on another sample material (2GZZ): 6 results, kept apart (see the table).
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2025, 10:30 | 12 | 12 mg/l |
| 5 Feb 2025, 10:37 | 11.8 | 11.8 mg/l |
| 22 Jan 2025, 11:50 | 11.5 | 11.5 mg/l |
| 2 Dec 2024, 13:17 | 10 | 10 mg/l |
| 1 Nov 2024, 11:00 | 9.19 | 9.19 mg/l |
| 4 Oct 2024, 13:37 | 9.06 | 9.06 mg/l |
| 9 Sep 2024, 10:15 | 6.51 | 6.51 mg/l |
| 1 Aug 2024, 16:35 | 8.42 | 8.42 mg/l |
| 8 Jul 2024, 14:22 | 9.13 | 9.13 mg/l |
| 3 Jun 2024, 15:38 | 9.12 | 9.12 mg/l |
| 19 Apr 2024, 11:34 | 10.5 | 10.5 mg/l |
| 15 Apr 2024, 14:13 | 11.1 | 11.1 mg/l |
| 1 Mar 2024, 10:44 | 10.9 | 10.9 mg/l |
| 2 Feb 2024, 09:44 | 11.2 | 11.2 mg/l |
| 23 Jan 2024, 11:01 | 10.9 | 10.9 mg/l |
| 10 Jan 2024, 11:50 | 12.1 | 12.1 mg/l |
| 4 Dec 2023, 09:20 | 10.7 | 10.7 mg/l |
| 2 Nov 2023, 09:56 | 8.81 | 8.81 mg/l |
| 18 Oct 2023, 10:18 | 10 | 10 mg/l |
Water temperature
code 0076 · °C
7 °C
Sampled 6 Mar 2025, 19 months ago · 19 results banked
Also measured in celsius on another sample material (2GZZ): 6 results, kept apart (see the table).
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2025, 10:30 | 7 | 7 °C |
| 5 Feb 2025, 10:37 | 5.6 | 5.6 °C |
| 22 Jan 2025, 11:50 | 6.2 | 6.2 °C |
| 2 Dec 2024, 13:17 | 9 | 9 °C |
| 1 Nov 2024, 11:00 | 11.3 | 11.3 °C |
| 4 Oct 2024, 13:37 | 11.3 | 11.3 °C |
| 9 Sep 2024, 10:15 | 15.3 | 15.3 °C |
| 1 Aug 2024, 16:35 | 18.3 | 18.3 °C |
| 8 Jul 2024, 14:22 | 15.7 | 15.7 °C |
| 3 Jun 2024, 15:38 | 16.4 | 16.4 °C |
| 19 Apr 2024, 11:34 | 10.4 | 10.4 °C |
| 15 Apr 2024, 14:13 | 10.9 | 10.9 °C |
| 1 Mar 2024, 10:44 | 7 | 7 °C |
| 2 Feb 2024, 09:44 | 6.6 | 6.6 °C |
| 23 Jan 2024, 11:01 | 5.8 | 5.8 °C |
| 10 Jan 2024, 11:50 | 2.8 | 2.8 °C |
| 4 Dec 2023, 09:20 | 5.3 | 5.3 °C |
| 2 Nov 2023, 09:56 | 10.4 | 10.4 °C |
| 18 Oct 2023, 10:18 | 10.7 | 10.7 °C |
pH
code 0061
8.19
Sampled 6 Mar 2025, 19 months ago · 19 results banked
Also measured in ph units on another sample material (2GZZ): 6 results, kept apart (see the table).
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2025, 10:30 | 8.19 | 8.19 |
| 5 Feb 2025, 10:37 | 8.18 | 8.18 |
| 22 Jan 2025, 11:50 | 8.01 | 8.01 |
| 2 Dec 2024, 13:17 | 7.84 | 7.84 |
| 1 Nov 2024, 11:00 | 7.83 | 7.83 |
| 4 Oct 2024, 13:37 | 7.79 | 7.79 |
| 9 Sep 2024, 10:15 | 8.09 | 8.09 |
| 1 Aug 2024, 16:35 | 7.88 | 7.88 |
| 8 Jul 2024, 14:22 | 8.03 | 8.03 |
| 3 Jun 2024, 15:38 | 8.07 | 8.07 |
| 19 Apr 2024, 11:34 | 7.98 | 7.98 |
| 15 Apr 2024, 14:13 | 7.82 | 7.82 |
| 1 Mar 2024, 10:44 | 8.09 | 8.09 |
| 2 Feb 2024, 09:44 | 8.07 | 8.07 |
| 23 Jan 2024, 11:01 | 8.03 | 8.03 |
| 10 Jan 2024, 11:50 | 8.14 | 8.14 |
| 4 Dec 2023, 09:20 | 7.84 | 7.84 |
| 2 Nov 2023, 09:56 | 7.78 | 7.78 |
| 18 Oct 2023, 10:18 | 7.95 | 7.95 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 6 Mar 2025, 19 months ago · 15 results banked
Every result (15)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2025, 10:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jan 2025, 11:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Nov 2024, 11:00 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Oct 2024, 13:37 | 0.03 | 0.03 mg/l |
| 9 Sep 2024, 10:15 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Aug 2024, 16:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jul 2024, 14:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Jun 2024, 15:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 1 Mar 2024, 10:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Feb 2024, 09:44 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Jan 2024, 11:01 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Jan 2024, 11:50 | 0.032 | 0.032 mg/l |
| 4 Dec 2023, 09:20 | 0.075 | 0.075 mg/l |
| 2 Nov 2023, 09:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Oct 2023, 10:18 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
9.39 mg/l
Sampled 6 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2025, 10:30 | 9.39 | 9.39 mg/l |
| 22 Jan 2025, 11:50 | 9.67 | 9.67 mg/l |
| 2 Dec 2024, 13:17 | 7.98 | 7.98 mg/l |
| 1 Nov 2024, 11:00 | 8.49 | 8.49 mg/l |
| 4 Oct 2024, 13:37 | 7.68 | 7.68 mg/l |
| 9 Sep 2024, 10:15 | 9.08 | 9.08 mg/l |
| 1 Aug 2024, 16:35 | 8.38 | 8.38 mg/l |
| 8 Jul 2024, 14:22 | 4.98 | 4.98 mg/l |
| 3 Jun 2024, 15:38 | 6.57 | 6.57 mg/l |
| 1 Mar 2024, 10:44 | 7.47 | 7.47 mg/l |
| 2 Feb 2024, 09:44 | 9.48 | 9.48 mg/l |
| 23 Jan 2024, 11:01 | 9.68 | 9.68 mg/l |
| 10 Jan 2024, 11:50 | 8.17 | 8.17 mg/l |
| 4 Dec 2023, 09:20 | 8.05 | 8.05 mg/l |
| 2 Nov 2023, 09:56 | 7.88 | 7.88 mg/l |
| 18 Oct 2023, 10:18 | 8.39 | 8.39 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.036 mg/l
Sampled 6 Mar 2025, 19 months ago · 16 results banked
Every result (16)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2025, 10:30 | 0.036 | 0.036 mg/l |
| 22 Jan 2025, 11:50 | 0.058 | 0.058 mg/l |
| 2 Dec 2024, 13:17 | 0.059 | 0.059 mg/l |
| 1 Nov 2024, 11:00 | 0.053 | 0.053 mg/l |
| 4 Oct 2024, 13:37 | 0.089 | 0.089 mg/l |
| 9 Sep 2024, 10:15 | 0.053 | 0.053 mg/l |
| 1 Aug 2024, 16:35 | 0.052 | 0.052 mg/l |
| 8 Jul 2024, 14:22 | 0.074 | 0.074 mg/l |
| 3 Jun 2024, 15:38 | 0.05 | 0.05 mg/l |
| 1 Mar 2024, 10:44 | 0.051 | 0.051 mg/l |
| 2 Feb 2024, 09:44 | 0.058 | 0.058 mg/l |
| 23 Jan 2024, 11:01 | 0.064 | 0.064 mg/l |
| 10 Jan 2024, 11:50 | 0.13 | 0.13 mg/l |
| 4 Dec 2023, 09:20 | 0.067 | 0.067 mg/l |
| 2 Nov 2023, 09:56 | 0.066 | 0.066 mg/l |
| 18 Oct 2023, 10:18 | 0.072 | 0.072 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
790 µS/cm
Sampled 6 Mar 2025, 19 months ago · 19 results banked
Also measured in microsiemens per centimetre on another sample material (2GZZ): 6 results, kept apart (see the table).
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 6 Mar 2025, 10:30 | 790 | 790 µS/cm |
| 5 Feb 2025, 10:37 | 774 | 774 µS/cm |
| 22 Jan 2025, 11:50 | 766 | 766 µS/cm |
| 2 Dec 2024, 13:17 | 756 | 756 µS/cm |
| 1 Nov 2024, 11:00 | 775 | 775 µS/cm |
| 4 Oct 2024, 13:37 | 713 | 713 µS/cm |
| 9 Sep 2024, 10:15 | 923 | 923 µS/cm |
| 1 Aug 2024, 16:35 | 769 | 769 µS/cm |
| 8 Jul 2024, 14:22 | 715 | 715 µS/cm |
| 3 Jun 2024, 15:38 | 804 | 804 µS/cm |
| 19 Apr 2024, 11:34 | 725 | 725 µS/cm |
| 15 Apr 2024, 14:13 | 746 | 746 µS/cm |
| 1 Mar 2024, 10:44 | 884 | 884 µS/cm |
| 2 Feb 2024, 09:44 | 752 | 752 µS/cm |
| 23 Jan 2024, 11:01 | 801 | 801 µS/cm |
| 10 Jan 2024, 11:50 | 698 | 698 µS/cm |
| 4 Dec 2023, 09:20 | 778 | 778 µS/cm |
| 2 Nov 2023, 09:56 | 730 | 730 µS/cm |
| 18 Oct 2023, 10:18 | 837 | 837 µS/cm |
Everything measured here
21 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 26 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 19 | Oct 2023 – Mar 2025 | 98.9% 6 Mar 2025 |
| Oxygen, Dissolved, % Saturation 9901 | Pond / lake / reservoir water | 6 | Apr 2026 – Sep 2026 | 101.1% 11 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 19 | Oct 2023 – Mar 2025 | 12 mg/l 6 Mar 2025 |
| Oxygen, Dissolved as O2 9924 | Pond / lake / reservoir water | 6 | Apr 2026 – Sep 2026 | 10 mg/l 11 Sep 2026 |
| Temperature of Water 0076 | River water | 19 | Oct 2023 – Mar 2025 | 7 °C 6 Mar 2025 |
| Temperature of Water 0076 | Pond / lake / reservoir water | 6 | Apr 2026 – Sep 2026 | 15.8 °C 11 Sep 2026 |
| pH 0061 | River water | 19 | Oct 2023 – Mar 2025 | 8.19 6 Mar 2025 |
| pH 0061 | Pond / lake / reservoir water | 6 | Apr 2026 – Sep 2026 | 8.15 11 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 15 | Oct 2023 – Mar 2025 | below 0.03 mg/l 6 Mar 2025 |
| Nitrate as N 0117 | River water | 16 | Oct 2023 – Mar 2025 | 9.39 mg/l 6 Mar 2025 |
| Orthophosphate, reactive as P 0180 | River water | 16 | Oct 2023 – Mar 2025 | 0.036 mg/l 6 Mar 2025 |
| Conductivity at 25 C 0077 | River water | 19 | Oct 2023 – Mar 2025 | 790 µS/cm 6 Mar 2025 |
| Conductivity at 25 C 0077 | Pond / lake / reservoir water | 6 | Apr 2026 – Sep 2026 | 925 µS/cm 11 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 16 | Oct 2023 – Mar 2025 | 270 mg/l 6 Mar 2025 |
| Ammonia un-ionised as N 0119 | River water | 15 | Oct 2023 – Mar 2025 | below 0.00044 mg/l 6 Mar 2025 |
| Nitrite as N 0118 | River water | 16 | Oct 2023 – Mar 2025 | 0.013 mg/l 6 Mar 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 16 | Oct 2023 – Mar 2025 | 9.4 mg/l 6 Mar 2025 |
| Alkalinity, Dissolved as CaCO3 7867 | Pond / lake / reservoir water | 6 | Apr 2026 – Sep 2026 | 260 mg/l 11 Sep 2026 |
| Ammoniacal Nitrogen, Filtered as N 9993 | Pond / lake / reservoir water | 6 | Apr 2026 – Sep 2026 | below 0.03 mg/l 11 Sep 2026 |
| Chloride, GF/C Filtered 7190 | Pond / lake / reservoir water | 6 | Apr 2026 – Sep 2026 | 64 mg/l 11 Sep 2026 |
| Nitrite, Filtered as N 6485 | Pond / lake / reservoir water | 6 | Apr 2026 – Sep 2026 | 0.011 mg/l 11 Sep 2026 |
| Nitrogen, Total as N 9686 | Pond / lake / reservoir water | 6 | Apr 2026 – Sep 2026 | 8 mg/l 11 Sep 2026 |
| Nitrogen, Total Oxidised, Filtered as N 9943 | Pond / lake / reservoir water | 6 | Apr 2026 – Sep 2026 | 7.6 mg/l 11 Sep 2026 |
| Orthophosphate, Filtered as P 9856 | Pond / lake / reservoir water | 6 | Apr 2026 – Sep 2026 | 0.049 mg/l 11 Sep 2026 |
| Phosphorus, Total as P 0348 | Pond / lake / reservoir water | 6 | Apr 2026 – Sep 2026 | 0.069 mg/l 11 Sep 2026 |
| Silicate, Filtered as SiO2 9857 | Pond / lake / reservoir water | 6 | Apr 2026 – Sep 2026 | 9.3 mg/l 11 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.