River Thet Nun's Road Bridge Thetford
EA name: R.THET NUN'S RD.BR.THETFORD
Environment Agency sampling point AN-44M08 · 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
- 7 Mar 2025, 16:0719 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 16 Oct 2023 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 587370, 282600As published, to the nearest 10 m. Open in a map
- River, by its own name
- Thet
- River, by the map
- River ThetPlaced on the river its name gives, 2 m from the line.
- Next gauge downstream
- Abbey Heath On the River Little Ouse · 3.5 km along the river
- Nearest gauge upstream
- Melford On the River Thet · 0.9 km along the river
- Why it was sampled
- Monitoring (national agency policy) (18 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
96.3%
Sampled 7 Mar 2025, 19 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 16:07 | 96.3 | 96.3% |
| 4 Feb 2025, 15:25 | 91.9 | 91.9% |
| 20 Jan 2025, 14:01 | 88.8 | 88.8% |
| 9 Dec 2024, 13:41 | 79 | 79% |
| 18 Nov 2024, 12:22 | 79.1 | 79.1% |
| 23 Oct 2024, 11:48 | 78.6 | 78.6% |
| 18 Sep 2024, 14:40 | 95.3 | 95.3% |
| 19 Aug 2024, 13:50 | 93.7 | 93.7% |
| 15 Jul 2024, 11:36 | 89.5 | 89.5% |
| 17 Jun 2024, 11:56 | 81.3 | 81.3% |
| 15 May 2024, 10:56 | 79.4 | 79.4% |
| 23 Apr 2024, 12:36 | 90.6 | 90.6% |
| 18 Mar 2024, 11:30 | 86.3 | 86.3% |
| 19 Feb 2024, 11:42 | 78.7 | 78.7% |
| 15 Jan 2024, 12:30 | 82.2 | 82.2% |
| 5 Dec 2023, 11:07 | 78.4 | 78.4% |
| 20 Nov 2023, 14:04 | 68.2 | 68.2% |
| 16 Oct 2023, 12:42 | 78.8 | 78.8% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.2 mg/l
Sampled 7 Mar 2025, 19 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 16:07 | 11.2 | 11.2 mg/l |
| 4 Feb 2025, 15:25 | 11.6 | 11.6 mg/l |
| 20 Jan 2025, 14:01 | 11.2 | 11.2 mg/l |
| 9 Dec 2024, 13:41 | 9.53 | 9.53 mg/l |
| 18 Nov 2024, 12:22 | 9.42 | 9.42 mg/l |
| 23 Oct 2024, 11:48 | 8.57 | 8.57 mg/l |
| 18 Sep 2024, 14:40 | 9.3 | 9.3 mg/l |
| 19 Aug 2024, 13:50 | 8.92 | 8.92 mg/l |
| 15 Jul 2024, 11:36 | 8.91 | 8.91 mg/l |
| 17 Jun 2024, 11:56 | 8.25 | 8.25 mg/l |
| 15 May 2024, 10:56 | 7.97 | 7.97 mg/l |
| 23 Apr 2024, 12:36 | 10.1 | 10.1 mg/l |
| 18 Mar 2024, 11:30 | 9.56 | 9.56 mg/l |
| 19 Feb 2024, 11:42 | 8.87 | 8.87 mg/l |
| 15 Jan 2024, 12:30 | 10.9 | 10.9 mg/l |
| 5 Dec 2023, 11:07 | 9.9 | 9.9 mg/l |
| 20 Nov 2023, 14:04 | 7.76 | 7.76 mg/l |
| 16 Oct 2023, 12:42 | 8.86 | 8.86 mg/l |
Water temperature
code 0076 · °C
8.8 °C
Sampled 7 Mar 2025, 19 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 16:07 | 8.8 | 8.8 °C |
| 4 Feb 2025, 15:25 | 5.5 | 5.5 °C |
| 20 Jan 2025, 14:01 | 5.6 | 5.6 °C |
| 9 Dec 2024, 13:41 | 7.2 | 7.2 °C |
| 18 Nov 2024, 12:22 | 7.7 | 7.7 °C |
| 23 Oct 2024, 11:48 | 11.4 | 11.4 °C |
| 18 Sep 2024, 14:40 | 16.4 | 16.4 °C |
| 19 Aug 2024, 13:50 | 17.6 | 17.6 °C |
| 15 Jul 2024, 11:36 | 15.5 | 15.5 °C |
| 17 Jun 2024, 11:56 | 14.6 | 14.6 °C |
| 15 May 2024, 10:56 | 15.1 | 15.1 °C |
| 23 Apr 2024, 12:36 | 10.4 | 10.4 °C |
| 18 Mar 2024, 11:30 | 10.7 | 10.7 °C |
| 19 Feb 2024, 11:42 | 10 | 10 °C |
| 15 Jan 2024, 12:30 | 3.6 | 3.6 °C |
| 5 Dec 2023, 11:07 | 5.4 | 5.4 °C |
| 20 Nov 2023, 14:04 | 9.6 | 9.6 °C |
| 16 Oct 2023, 12:42 | 10.1 | 10.1 °C |
pH
code 0061
8
Sampled 7 Mar 2025, 19 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 16:07 | 8 | 8 |
| 4 Feb 2025, 15:25 | 7.85 | 7.85 |
| 20 Jan 2025, 14:01 | 7.8 | 7.8 |
| 9 Dec 2024, 13:41 | 7.92 | 7.92 |
| 18 Nov 2024, 12:22 | 7.79 | 7.79 |
| 23 Oct 2024, 11:48 | 7.65 | 7.65 |
| 18 Sep 2024, 14:40 | 7.87 | 7.87 |
| 19 Aug 2024, 13:50 | 7.91 | 7.91 |
| 15 Jul 2024, 11:36 | 7.95 | 7.95 |
| 17 Jun 2024, 11:56 | 7.64 | 7.64 |
| 15 May 2024, 10:56 | 7.64 | 7.64 |
| 23 Apr 2024, 12:36 | 7.9 | 7.9 |
| 18 Mar 2024, 11:30 | 7.81 | 7.81 |
| 19 Feb 2024, 11:42 | 7.89 | 7.89 |
| 15 Jan 2024, 12:30 | 7.86 | 7.86 |
| 5 Dec 2023, 11:07 | 7.7 | 7.7 |
| 20 Nov 2023, 14:04 | 7.67 | 7.67 |
| 16 Oct 2023, 12:42 | 7.86 | 7.86 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 7 Mar 2025, 19 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 16:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Feb 2025, 15:25 | 0.043 | 0.043 mg/l |
| 20 Jan 2025, 14:01 | 0.049 | 0.049 mg/l |
| 9 Dec 2024, 13:41 | 0.065 | 0.065 mg/l |
| 18 Nov 2024, 12:22 | <0.03 | below 0.03 mg/l (not detected above this) |
| 23 Oct 2024, 11:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Sep 2024, 14:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Aug 2024, 13:50 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jul 2024, 11:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jun 2024, 11:56 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 May 2024, 10:56 | 0.1 | 0.1 mg/l |
| 23 Apr 2024, 12:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Mar 2024, 11:30 | 0.049 | 0.049 mg/l |
| 19 Feb 2024, 11:42 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Jan 2024, 12:30 | 0.054 | 0.054 mg/l |
| 5 Dec 2023, 11:07 | 0.053 | 0.053 mg/l |
| 20 Nov 2023, 14:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Oct 2023, 12:42 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
9.57 mg/l
Sampled 7 Mar 2025, 19 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 16:07 | 9.57 | 9.57 mg/l |
| 4 Feb 2025, 15:25 | 9.94 | 9.94 mg/l |
| 20 Jan 2025, 14:01 | 10.9 | 10.9 mg/l |
| 9 Dec 2024, 13:41 | 7.15 | 7.15 mg/l |
| 18 Nov 2024, 12:22 | 11 | 11 mg/l |
| 23 Oct 2024, 11:48 | 8.98 | 8.98 mg/l |
| 18 Sep 2024, 14:40 | 7.99 | 7.99 mg/l |
| 19 Aug 2024, 13:50 | 9.18 | 9.18 mg/l |
| 15 Jul 2024, 11:36 | 8.17 | 8.17 mg/l |
| 17 Jun 2024, 11:56 | 6.98 | 6.98 mg/l |
| 15 May 2024, 10:56 | 9.43 | 9.43 mg/l |
| 23 Apr 2024, 12:36 | 9.77 | 9.77 mg/l |
| 18 Mar 2024, 11:30 | 8.26 | 8.26 mg/l |
| 19 Feb 2024, 11:42 | 6.48 | 6.48 mg/l |
| 15 Jan 2024, 12:30 | 8.87 | 8.87 mg/l |
| 5 Dec 2023, 11:07 | 8.76 | 8.76 mg/l |
| 20 Nov 2023, 14:04 | 7.25 | 7.25 mg/l |
| 16 Oct 2023, 12:42 | 6.48 | 6.48 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.037 mg/l
Sampled 7 Mar 2025, 19 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 16:07 | 0.037 | 0.037 mg/l |
| 4 Feb 2025, 15:25 | 0.052 | 0.052 mg/l |
| 20 Jan 2025, 14:01 | 0.062 | 0.062 mg/l |
| 9 Dec 2024, 13:41 | 0.12 | 0.12 mg/l |
| 18 Nov 2024, 12:22 | 0.061 | 0.061 mg/l |
| 23 Oct 2024, 11:48 | 0.057 | 0.057 mg/l |
| 18 Sep 2024, 14:40 | 0.077 | 0.077 mg/l |
| 19 Aug 2024, 13:50 | 0.065 | 0.065 mg/l |
| 15 Jul 2024, 11:36 | 0.062 | 0.062 mg/l |
| 17 Jun 2024, 11:56 | 0.063 | 0.063 mg/l |
| 15 May 2024, 10:56 | 0.05 | 0.05 mg/l |
| 23 Apr 2024, 12:36 | 0.031 | 0.031 mg/l |
| 18 Mar 2024, 11:30 | 0.056 | 0.056 mg/l |
| 19 Feb 2024, 11:42 | 0.045 | 0.045 mg/l |
| 15 Jan 2024, 12:30 | 0.065 | 0.065 mg/l |
| 5 Dec 2023, 11:07 | 0.061 | 0.061 mg/l |
| 20 Nov 2023, 14:04 | 0.069 | 0.069 mg/l |
| 16 Oct 2023, 12:42 | 0.13 | 0.13 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
802 µS/cm
Sampled 7 Mar 2025, 19 months ago · 18 results banked
Every result (18)
| Sampled | Result as published | Reads as |
|---|---|---|
| 7 Mar 2025, 16:07 | 802 | 802 µS/cm |
| 4 Feb 2025, 15:25 | 839 | 839 µS/cm |
| 20 Jan 2025, 14:01 | 850 | 850 µS/cm |
| 9 Dec 2024, 13:41 | 708 | 708 µS/cm |
| 18 Nov 2024, 12:22 | 862 | 862 µS/cm |
| 23 Oct 2024, 11:48 | 849 | 849 µS/cm |
| 18 Sep 2024, 14:40 | 812 | 812 µS/cm |
| 19 Aug 2024, 13:50 | 809 | 809 µS/cm |
| 15 Jul 2024, 11:36 | 832 | 832 µS/cm |
| 17 Jun 2024, 11:56 | 848 | 848 µS/cm |
| 15 May 2024, 10:56 | 788 | 788 µS/cm |
| 23 Apr 2024, 12:36 | 742 | 742 µS/cm |
| 18 Mar 2024, 11:30 | 809 | 809 µS/cm |
| 19 Feb 2024, 11:42 | 725 | 725 µS/cm |
| 15 Jan 2024, 12:30 | 821 | 821 µS/cm |
| 5 Dec 2023, 11:07 | 877 | 877 µS/cm |
| 20 Nov 2023, 14:04 | 815 | 815 µS/cm |
| 16 Oct 2023, 12:42 | 773 | 773 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 | 18 | Oct 2023 – Mar 2025 | 96.3% 7 Mar 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 18 | Oct 2023 – Mar 2025 | 11.2 mg/l 7 Mar 2025 |
| Temperature of Water 0076 | River water | 18 | Oct 2023 – Mar 2025 | 8.8 °C 7 Mar 2025 |
| pH 0061 | River water | 18 | Oct 2023 – Mar 2025 | 8 7 Mar 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 18 | Oct 2023 – Mar 2025 | below 0.03 mg/l 7 Mar 2025 |
| Nitrate as N 0117 | River water | 18 | Oct 2023 – Mar 2025 | 9.57 mg/l 7 Mar 2025 |
| Orthophosphate, reactive as P 0180 | River water | 18 | Oct 2023 – Mar 2025 | 0.037 mg/l 7 Mar 2025 |
| Conductivity at 25 C 0077 | River water | 18 | Oct 2023 – Mar 2025 | 802 µS/cm 7 Mar 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 18 | Oct 2023 – Mar 2025 | 280 mg/l 7 Mar 2025 |
| Ammonia un-ionised as N 0119 | River water | 18 | Oct 2023 – Mar 2025 | below 0.0005 mg/l 7 Mar 2025 |
| BOD : 5 Day ATU 0085 | River water | 14 | Feb 2024 – Mar 2025 | 1.6 mg/l 7 Mar 2025 |
| Nitrite as N 0118 | River water | 18 | Oct 2023 – Mar 2025 | 0.035 mg/l 7 Mar 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 18 | Oct 2023 – Mar 2025 | 9.6 mg/l 7 Mar 2025 |
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.