Little Ouse River Nun's Road Bridge Thetford
EA name: LT.OUSE R. NUN'S RD.BR.THETFORD
Environment Agency sampling point AN-43M02 · 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
- 18 Sep 2026, 13:2113 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 31 since 4 Apr 2024 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) · results completed 22 Sep 2026
- Where
- National Grid 587400, 282500As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Its name does not give one
- River, by the map
- Not placedGrid reference only to 100 m and no line carries the name it gives, so position alone cannot choose. The river map cannot say which watercourse this is.
- Next gauge downstream
- Not known
- Why it was sampled
- Monitoring (national agency policy) (25 samples)
Environmental monitoring statutory (EU directives) (6 samples)
Results here were completed a median of 10 days after the sample was taken (2 to 24 days, 13 samples).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
90.4%
Sampled 18 Sep 2026, 13 days ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Sep 2026, 13:21 | 90.4 | 90.4% |
| 4 Aug 2026, 11:04 | 89 | 89% |
| 14 Jul 2026, 10:34 | 83.5 | 83.5% |
| 8 Jun 2026, 10:54 | 75.8 | 75.8% |
| 5 May 2026, 13:53 | 91.2 | 91.2% |
| 16 Apr 2026, 09:46 | 83.9 | 83.9% |
| 17 Mar 2026, 10:08 | 89.4 | 89.4% |
| 6 Feb 2026, 12:07 | 85.2 | 85.2% |
| 19 Jan 2026, 11:58 | 86 | 86% |
| 4 Dec 2025, 13:27 | 82.3 | 82.3% |
| 7 Nov 2025, 13:37 | 74.7 | 74.7% |
| 28 Oct 2025, 08:36 | 82.8 | 82.8% |
| 5 Sep 2025, 14:45 | 90.3 | 90.3% |
| 8 Aug 2025, 08:25 | 82.3 | 82.3% |
| 15 Jul 2025, 14:55 | 92.2 | 92.2% |
| 11 Jun 2025, 10:42 | 88.4 | 88.4% |
| 8 May 2025, 13:39 | 96.7 | 96.7% |
| 4 Apr 2025, 11:48 | 95.2 | 95.2% |
| 7 Mar 2025, 15:57 | 103 | 103% |
| 4 Feb 2025, 15:31 | 92.1 | 92.1% |
| 15 Jan 2025, 14:16 | 87.6 | 87.6% |
| 10 Dec 2024, 11:42 | 80.6 | 80.6% |
| 7 Nov 2024, 10:25 | 75.8 | 75.8% |
| 23 Oct 2024, 11:38 | 78.1 | 78.1% |
| 3 Sep 2024, 15:06 | 88.1 | 88.1% |
| 15 Aug 2024, 13:35 | 89.2 | 89.2% |
| 4 Jul 2024, 13:07 | 89.7 | 89.7% |
| 14 Jun 2024, 10:38 | 86.2 | 86.2% |
| 7 May 2024, 11:33 | 88.6 | 88.6% |
| 9 Apr 2024, 09:27 | 83.3 | 83.3% |
| 4 Apr 2024, 13:25 | 88.9 | 88.9% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.31 mg/l
Sampled 18 Sep 2026, 13 days ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Sep 2026, 13:21 | 9.31 | 9.31 mg/l |
| 4 Aug 2026, 11:04 | 8.49 | 8.49 mg/l |
| 14 Jul 2026, 10:34 | 8.05 | 8.05 mg/l |
| 8 Jun 2026, 10:54 | 7.66 | 7.66 mg/l |
| 5 May 2026, 13:53 | 9.59 | 9.59 mg/l |
| 16 Apr 2026, 09:46 | 9.1 | 9.1 mg/l |
| 17 Mar 2026, 10:08 | 10.2 | 10.2 mg/l |
| 6 Feb 2026, 12:07 | 10.4 | 10.4 mg/l |
| 19 Jan 2026, 11:58 | 10.5 | 10.5 mg/l |
| 4 Dec 2025, 13:27 | 9.87 | 9.87 mg/l |
| 7 Nov 2025, 13:37 | 8.01 | 8.01 mg/l |
| 28 Oct 2025, 08:36 | 9.32 | 9.32 mg/l |
| 5 Sep 2025, 14:45 | 9.02 | 9.02 mg/l |
| 8 Aug 2025, 08:25 | 8.13 | 8.13 mg/l |
| 15 Jul 2025, 14:55 | 9.02 | 9.02 mg/l |
| 11 Jun 2025, 10:42 | 8.83 | 8.83 mg/l |
| 8 May 2025, 13:39 | 10.5 | 10.5 mg/l |
| 4 Apr 2025, 11:48 | 10.3 | 10.3 mg/l |
| 7 Mar 2025, 15:57 | 11.6 | 11.6 mg/l |
| 4 Feb 2025, 15:31 | 11.5 | 11.5 mg/l |
| 15 Jan 2025, 14:16 | 10.6 | 10.6 mg/l |
| 10 Dec 2024, 11:42 | 9.86 | 9.86 mg/l |
| 7 Nov 2024, 10:25 | 8.32 | 8.32 mg/l |
| 23 Oct 2024, 11:38 | 8.53 | 8.53 mg/l |
| 3 Sep 2024, 15:06 | 8.56 | 8.56 mg/l |
| 15 Aug 2024, 13:35 | 8.45 | 8.45 mg/l |
| 4 Jul 2024, 13:07 | 9.08 | 9.08 mg/l |
| 14 Jun 2024, 10:38 | 9.02 | 9.02 mg/l |
| 7 May 2024, 11:33 | 9.1 | 9.1 mg/l |
| 9 Apr 2024, 09:27 | 8.97 | 8.97 mg/l |
| 4 Apr 2024, 13:25 | 9.64 | 9.64 mg/l |
Water temperature
code 0076 · °C
13.9 °C
Sampled 18 Sep 2026, 13 days ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Sep 2026, 13:21 | 13.9 | 13.9 °C |
| 4 Aug 2026, 11:04 | 17.5 | 17.5 °C |
| 14 Jul 2026, 10:34 | 17 | 17 °C |
| 8 Jun 2026, 10:54 | 14.8 | 14.8 °C |
| 5 May 2026, 13:53 | 13 | 13 °C |
| 16 Apr 2026, 09:46 | 11.6 | 11.6 °C |
| 17 Mar 2026, 10:08 | 9.5 | 9.5 °C |
| 6 Feb 2026, 12:07 | 6.6 | 6.6 °C |
| 19 Jan 2026, 11:58 | 6.8 | 6.8 °C |
| 4 Dec 2025, 13:27 | 7.4 | 7.4 °C |
| 7 Nov 2025, 13:37 | 12.1 | 12.1 °C |
| 28 Oct 2025, 08:36 | 10 | 10 °C |
| 5 Sep 2025, 14:45 | 15.3 | 15.3 °C |
| 8 Aug 2025, 08:25 | 15.8 | 15.8 °C |
| 15 Jul 2025, 14:55 | 16.3 | 16.3 °C |
| 11 Jun 2025, 10:42 | 15.3 | 15.3 °C |
| 8 May 2025, 13:39 | 11.7 | 11.7 °C |
| 4 Apr 2025, 11:48 | 11.6 | 11.6 °C |
| 7 Mar 2025, 15:57 | 10.1 | 10.1 °C |
| 4 Feb 2025, 15:31 | 5.9 | 5.9 °C |
| 15 Jan 2025, 14:16 | 6.9 | 6.9 °C |
| 10 Dec 2024, 11:42 | 6.6 | 6.6 °C |
| 7 Nov 2024, 10:25 | 11.1 | 11.1 °C |
| 23 Oct 2024, 11:38 | 11.3 | 11.3 °C |
| 3 Sep 2024, 15:06 | 16.6 | 16.6 °C |
| 15 Aug 2024, 13:35 | 17.8 | 17.8 °C |
| 4 Jul 2024, 13:07 | 14.7 | 14.7 °C |
| 14 Jun 2024, 10:38 | 13.2 | 13.2 °C |
| 7 May 2024, 11:33 | 14 | 14 °C |
| 9 Apr 2024, 09:27 | 11.9 | 11.9 °C |
| 4 Apr 2024, 13:25 | 11.6 | 11.6 °C |
pH
code 0061
7.78
Sampled 18 Sep 2026, 13 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Sep 2026, 13:21 | 7.78 | 7.78 |
| 4 Aug 2026, 11:04 | 7.73 | 7.73 |
| 14 Jul 2026, 10:34 | 7.72 | 7.72 |
| 8 Jun 2026, 10:54 | 7.78 | 7.78 |
| 5 May 2026, 13:53 | 7.78 | 7.78 |
| 16 Apr 2026, 09:46 | 7.91 | 7.91 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 18 Sep 2026, 13 days ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Sep 2026, 13:21 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Aug 2026, 11:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Jul 2026, 10:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Jun 2026, 10:54 | 0.035 | 0.035 mg/l |
| 5 May 2026, 13:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Apr 2026, 09:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Mar 2026, 10:08 | <0.03 | below 0.03 mg/l (not detected above this) |
| 6 Feb 2026, 12:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Jan 2026, 11:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Dec 2025, 13:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Nov 2025, 13:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 28 Oct 2025, 08:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Sep 2025, 14:45 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 Aug 2025, 08:25 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jul 2025, 14:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Jun 2025, 10:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 8 May 2025, 13:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Apr 2025, 11:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 Mar 2025, 15:57 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2025, 15:31 | 0.035 | 0.035 mg/l |
| 15 Jan 2025, 14:16 | 0.067 | 0.067 mg/l |
| 10 Dec 2024, 11:42 | 0.034 | 0.034 mg/l |
| 7 Nov 2024, 10:25 | 0.035 | 0.035 mg/l |
| 23 Oct 2024, 11:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 3 Sep 2024, 15:06 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Aug 2024, 13:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Jul 2024, 13:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Jun 2024, 10:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 7 May 2024, 11:33 | 0.03 | 0.03 mg/l |
| 9 Apr 2024, 09:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Apr 2024, 13:25 | 0.032 | 0.032 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
8.69 mg/l
Sampled 18 Sep 2026, 13 days ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Sep 2026, 13:21 | 8.69 | 8.69 mg/l |
| 4 Aug 2026, 11:04 | 8.09 | 8.09 mg/l |
| 14 Jul 2026, 10:34 | 7.68 | 7.68 mg/l |
| 8 Jun 2026, 10:54 | 6.08 | 6.08 mg/l |
| 5 May 2026, 13:53 | 7.58 | 7.58 mg/l |
| 16 Apr 2026, 09:46 | 7.79 | 7.79 mg/l |
| 17 Mar 2026, 10:08 | 7.89 | 7.89 mg/l |
| 6 Feb 2026, 12:07 | 11 | 11 mg/l |
| 19 Jan 2026, 11:58 | 13 | 13 mg/l |
| 4 Dec 2025, 13:27 | 8.89 | 8.89 mg/l |
| 7 Nov 2025, 13:37 | 9.48 | 9.48 mg/l |
| 28 Oct 2025, 08:36 | 8.19 | 8.19 mg/l |
| 5 Sep 2025, 14:45 | 5.79 | 5.79 mg/l |
| 8 Aug 2025, 08:25 | 7.39 | 7.39 mg/l |
| 15 Jul 2025, 14:55 | 8.48 | 8.48 mg/l |
| 11 Jun 2025, 10:42 | 6.88 | 6.88 mg/l |
| 8 May 2025, 13:39 | 7.78 | 7.78 mg/l |
| 4 Apr 2025, 11:48 | 8.49 | 8.49 mg/l |
| 7 Mar 2025, 15:57 | 8.78 | 8.78 mg/l |
| 4 Feb 2025, 15:31 | 9.56 | 9.56 mg/l |
| 15 Jan 2025, 14:16 | 8.55 | 8.55 mg/l |
| 10 Dec 2024, 11:42 | 11 | 11 mg/l |
| 7 Nov 2024, 10:25 | 8.09 | 8.09 mg/l |
| 23 Oct 2024, 11:38 | 7.39 | 7.39 mg/l |
| 3 Sep 2024, 15:06 | 7.59 | 7.59 mg/l |
| 15 Aug 2024, 13:35 | 7.79 | 7.79 mg/l |
| 4 Jul 2024, 13:07 | 7.38 | 7.38 mg/l |
| 14 Jun 2024, 10:38 | 6.88 | 6.88 mg/l |
| 7 May 2024, 11:33 | 7.07 | 7.07 mg/l |
| 9 Apr 2024, 09:27 | 7.27 | 7.27 mg/l |
| 4 Apr 2024, 13:25 | 7.77 | 7.77 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.077 mg/l
Sampled 18 Sep 2026, 13 days ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Sep 2026, 13:21 | 0.077 | 0.077 mg/l |
| 4 Aug 2026, 11:04 | 0.059 | 0.059 mg/l |
| 14 Jul 2026, 10:34 | 0.084 | 0.084 mg/l |
| 8 Jun 2026, 10:54 | 0.1 | 0.1 mg/l |
| 5 May 2026, 13:53 | 0.051 | 0.051 mg/l |
| 16 Apr 2026, 09:46 | 0.056 | 0.056 mg/l |
| 17 Mar 2026, 10:08 | 0.05 | 0.05 mg/l |
| 6 Feb 2026, 12:07 | 0.085 | 0.085 mg/l |
| 19 Jan 2026, 11:58 | 0.12 | 0.12 mg/l |
| 4 Dec 2025, 13:27 | 0.092 | 0.092 mg/l |
| 7 Nov 2025, 13:37 | 0.096 | 0.096 mg/l |
| 28 Oct 2025, 08:36 | 0.096 | 0.096 mg/l |
| 5 Sep 2025, 14:45 | 0.097 | 0.097 mg/l |
| 8 Aug 2025, 08:25 | 0.062 | 0.062 mg/l |
| 15 Jul 2025, 14:55 | 0.077 | 0.077 mg/l |
| 11 Jun 2025, 10:42 | 0.066 | 0.066 mg/l |
| 8 May 2025, 13:39 | 0.049 | 0.049 mg/l |
| 4 Apr 2025, 11:48 | 0.027 | 0.027 mg/l |
| 7 Mar 2025, 15:57 | 0.047 | 0.047 mg/l |
| 4 Feb 2025, 15:31 | 0.063 | 0.063 mg/l |
| 15 Jan 2025, 14:16 | 0.069 | 0.069 mg/l |
| 10 Dec 2024, 11:42 | 0.16 | 0.16 mg/l |
| 7 Nov 2024, 10:25 | 0.09 | 0.09 mg/l |
| 23 Oct 2024, 11:38 | 0.085 | 0.085 mg/l |
| 3 Sep 2024, 15:06 | 0.076 | 0.076 mg/l |
| 15 Aug 2024, 13:35 | 0.084 | 0.084 mg/l |
| 4 Jul 2024, 13:07 | 0.076 | 0.076 mg/l |
| 14 Jun 2024, 10:38 | 0.067 | 0.067 mg/l |
| 7 May 2024, 11:33 | 0.069 | 0.069 mg/l |
| 9 Apr 2024, 09:27 | 0.061 | 0.061 mg/l |
| 4 Apr 2024, 13:25 | 0.067 | 0.067 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
661 µS/cm
Sampled 18 Sep 2026, 13 days ago · 31 results banked
Every result (31)
| Sampled | Result as published | Reads as |
|---|---|---|
| 18 Sep 2026, 13:21 | 661 | 661 µS/cm |
| 4 Aug 2026, 11:04 | 662 | 662 µS/cm |
| 14 Jul 2026, 10:34 | 694 | 694 µS/cm |
| 8 Jun 2026, 10:54 | 762 | 762 µS/cm |
| 5 May 2026, 13:53 | 820 | 820 µS/cm |
| 16 Apr 2026, 09:46 | 843 | 843 µS/cm |
| 17 Mar 2026, 10:08 | 869 | 869 µS/cm |
| 6 Feb 2026, 12:07 | 847 | 847 µS/cm |
| 19 Jan 2026, 11:58 | 804 | 804 µS/cm |
| 4 Dec 2025, 13:27 | 924 | 924 µS/cm |
| 7 Nov 2025, 13:37 | 717 | 717 µS/cm |
| 28 Oct 2025, 08:36 | 787 | 787 µS/cm |
| 5 Sep 2025, 14:45 | 746 | 746 µS/cm |
| 8 Aug 2025, 08:25 | 734 | 734 µS/cm |
| 15 Jul 2025, 14:55 | 681 | 681 µS/cm |
| 11 Jun 2025, 10:42 | 866 | 866 µS/cm |
| 8 May 2025, 13:39 | 801 | 801 µS/cm |
| 4 Apr 2025, 11:48 | 808 | 808 µS/cm |
| 7 Mar 2025, 15:57 | 810 | 810 µS/cm |
| 4 Feb 2025, 15:31 | 858 | 858 µS/cm |
| 15 Jan 2025, 14:16 | 870 | 870 µS/cm |
| 10 Dec 2024, 11:42 | 698 | 698 µS/cm |
| 7 Nov 2024, 10:25 | 848 | 848 µS/cm |
| 23 Oct 2024, 11:38 | 858 | 858 µS/cm |
| 3 Sep 2024, 15:06 | 809 | 809 µS/cm |
| 15 Aug 2024, 13:35 | 819 | 819 µS/cm |
| 4 Jul 2024, 13:07 | 817 | 817 µS/cm |
| 14 Jun 2024, 10:38 | 841 | 841 µS/cm |
| 7 May 2024, 11:33 | 924 | 924 µS/cm |
| 9 Apr 2024, 09:27 | 821 | 821 µS/cm |
| 4 Apr 2024, 13:25 | 821 | 821 µS/cm |
Everything measured here
18 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 18 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 31 | Apr 2024 – Sep 2026 | 90.4% 18 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 31 | Apr 2024 – Sep 2026 | 9.31 mg/l 18 Sep 2026 |
| Temperature of Water 0076 | River water | 31 | Apr 2024 – Sep 2026 | 13.9 °C 18 Sep 2026 |
| pH 0061 | River water | 6 | Apr 2026 – Sep 2026 | 7.78 18 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 31 | Apr 2024 – Sep 2026 | below 0.03 mg/l 18 Sep 2026 |
| Nitrate as N 0117 | River water | 31 | Apr 2024 – Sep 2026 | 8.69 mg/l 18 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 31 | Apr 2024 – Sep 2026 | 0.077 mg/l 18 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 31 | Apr 2024 – Sep 2026 | 661 µS/cm 18 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 6 | Apr 2026 – Sep 2026 | 230 mg/l 18 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 6 | Apr 2026 – Sep 2026 | below 0.00044 mg/l 18 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 24 | Apr 2024 – Mar 2026 | 1.4 mg/l 17 Mar 2026 |
| Chemical Oxygen Demand :- {COD} 0092 | River water | 25 | Apr 2024 – Mar 2026 | 21 mg/l 17 Mar 2026 |
| Chloride 0172 | River water | 25 | Apr 2024 – Mar 2026 | 58 mg/l 17 Mar 2026 |
| Chlorophyll : Acetone Extract 7887 | River water | 22 | Apr 2024 – Mar 2026 | 7.6 µg/l 17 Mar 2026 |
| Nitrite as N 0118 | River water | 31 | Apr 2024 – Sep 2026 | 0.012 mg/l 18 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 31 | Apr 2024 – Sep 2026 | 8.7 mg/l 18 Sep 2026 |
| Silica, reactive as SiO2 0182 | River water | 25 | Apr 2024 – Mar 2026 | 11 mg/l 17 Mar 2026 |
| Solids, Suspended at 105 C 0135 | River water | 25 | Apr 2024 – Mar 2026 | 8.1 mg/l 17 Mar 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.