River Nar Marham Gauging Station
EA name: R.NAR MARHAM GAUGING STATION
Environment Agency sampling point AN-58M08 · 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
- 16 Mar 2026, 09:387 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 30 Sep 2026 and had nothing newer.
- Samples banked
- 27 since 16 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
- Latest sample
- River / running surface water Monitoring (national agency policy)
- Where
- National Grid 572400, 312000As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Nar
- River, by the map
- River NarPlaced on the river its name gives, 5 m from the line.
- Next gauge downstream
- Setchey Bridge On the River Nar · 9.8 km along the riverBeside Marham: too close to say above or below.
- Why it was sampled
- Monitoring (national agency policy) (27 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
99.3%
Sampled 16 Mar 2026, 7 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 09:38 | 99.3 | 99.3% |
| 11 Feb 2026, 09:24 | 92.5 | 92.5% |
| 26 Jan 2026, 11:06 | 93.3 | 93.3% |
| 10 Dec 2025, 08:20 | 84.7 | 84.7% |
| 3 Nov 2025, 08:10 | 90.2 | 90.2% |
| 13 Oct 2025, 11:51 | 100.4 | 100.4% |
| 4 Sep 2025, 12:27 | 105.1 | 105.1% |
| 5 Aug 2025, 12:40 | 126.5 | 126.5% |
| 2 Jul 2025, 09:19 | 79.3 | 79.3% |
| 5 Jun 2025, 09:18 | 93.6 | 93.6% |
| 9 May 2025, 08:58 | 101.2 | 101.2% |
| 10 Apr 2025, 09:36 | 96.2 | 96.2% |
| 22 Jan 2025, 12:11 | 95.8 | 95.8% |
| 4 Dec 2024, 08:50 | 91.5 | 91.5% |
| 18 Nov 2024, 11:27 | 95.4 | 95.4% |
| 14 Oct 2024, 11:30 | 99.2 | 99.2% |
| 19 Sep 2024, 08:49 | 83.5 | 83.5% |
| 22 Jul 2024, 13:04 | 106.9 | 106.9% |
| 18 Jun 2024, 14:13 | 119.9 | 119.9% |
| 20 May 2024, 08:47 | 98.8 | 98.8% |
| 15 Apr 2024, 11:39 | 102.5 | 102.5% |
| 18 Mar 2024, 09:16 | 99.2 | 99.2% |
| 19 Feb 2024, 11:08 | 94 | 94% |
| 16 Jan 2024, 13:31 | 96.6 | 96.6% |
| 5 Dec 2023, 12:53 | 93 | 93% |
| 20 Nov 2023, 09:22 | 84.6 | 84.6% |
| 16 Oct 2023, 12:17 | 102.4 | 102.4% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11.8 mg/l
Sampled 16 Mar 2026, 7 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 09:38 | 11.8 | 11.8 mg/l |
| 11 Feb 2026, 09:24 | 10.7 | 10.7 mg/l |
| 26 Jan 2026, 11:06 | 11.4 | 11.4 mg/l |
| 10 Dec 2025, 08:20 | 9.73 | 9.73 mg/l |
| 3 Nov 2025, 08:10 | 10.4 | 10.4 mg/l |
| 13 Oct 2025, 11:51 | 10.6 | 10.6 mg/l |
| 4 Sep 2025, 12:27 | 10.4 | 10.4 mg/l |
| 5 Aug 2025, 12:40 | 12.4 | 12.4 mg/l |
| 2 Jul 2025, 09:19 | 7.38 | 7.38 mg/l |
| 5 Jun 2025, 09:18 | 9.64 | 9.64 mg/l |
| 9 May 2025, 08:58 | 11.2 | 11.2 mg/l |
| 10 Apr 2025, 09:36 | 10.8 | 10.8 mg/l |
| 22 Jan 2025, 12:11 | 11.8 | 11.8 mg/l |
| 4 Dec 2024, 08:50 | 11.3 | 11.3 mg/l |
| 18 Nov 2024, 11:27 | 11.5 | 11.5 mg/l |
| 14 Oct 2024, 11:30 | 11.4 | 11.4 mg/l |
| 19 Sep 2024, 08:49 | 8.49 | 8.49 mg/l |
| 22 Jul 2024, 13:04 | 10.3 | 10.3 mg/l |
| 18 Jun 2024, 14:13 | 12 | 12 mg/l |
| 20 May 2024, 08:47 | 10.2 | 10.2 mg/l |
| 15 Apr 2024, 11:39 | 11.5 | 11.5 mg/l |
| 18 Mar 2024, 09:16 | 11.3 | 11.3 mg/l |
| 19 Feb 2024, 11:08 | 10.8 | 10.8 mg/l |
| 16 Jan 2024, 13:31 | 12.4 | 12.4 mg/l |
| 5 Dec 2023, 12:53 | 11.3 | 11.3 mg/l |
| 20 Nov 2023, 09:22 | 9.65 | 9.65 mg/l |
| 16 Oct 2023, 12:17 | 11.9 | 11.9 mg/l |
Water temperature
code 0076 · °C
7.8 °C
Sampled 16 Mar 2026, 7 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 09:38 | 7.8 | 7.8 °C |
| 11 Feb 2026, 09:24 | 9 | 9 °C |
| 26 Jan 2026, 11:06 | 6.6 | 6.6 °C |
| 10 Dec 2025, 08:20 | 9.2 | 9.2 °C |
| 3 Nov 2025, 08:10 | 9.1 | 9.1 °C |
| 13 Oct 2025, 11:51 | 12.7 | 12.7 °C |
| 4 Sep 2025, 12:27 | 15.7 | 15.7 °C |
| 5 Aug 2025, 12:40 | 16.2 | 16.2 °C |
| 2 Jul 2025, 09:19 | 18.7 | 18.7 °C |
| 5 Jun 2025, 09:18 | 13.9 | 13.9 °C |
| 9 May 2025, 08:58 | 10.8 | 10.8 °C |
| 10 Apr 2025, 09:36 | 10.2 | 10.2 °C |
| 22 Jan 2025, 12:11 | 6.2 | 6.2 °C |
| 4 Dec 2024, 08:50 | 6.3 | 6.3 °C |
| 18 Nov 2024, 11:27 | 7.1 | 7.1 °C |
| 14 Oct 2024, 11:30 | 9.2 | 9.2 °C |
| 19 Sep 2024, 08:49 | 14.5 | 14.5 °C |
| 22 Jul 2024, 13:04 | 17 | 17 °C |
| 18 Jun 2024, 14:13 | 15.3 | 15.3 °C |
| 20 May 2024, 08:47 | 13.7 | 13.7 °C |
| 15 Apr 2024, 11:39 | 10.1 | 10.1 °C |
| 18 Mar 2024, 09:16 | 9.6 | 9.6 °C |
| 19 Feb 2024, 11:08 | 9.3 | 9.3 °C |
| 16 Jan 2024, 13:31 | 4.9 | 4.9 °C |
| 5 Dec 2023, 12:53 | 6.8 | 6.8 °C |
| 20 Nov 2023, 09:22 | 9.5 | 9.5 °C |
| 16 Oct 2023, 12:17 | 8.6 | 8.6 °C |
pH
code 0061
8.22
Sampled 16 Mar 2026, 7 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 09:38 | 8.22 | 8.22 |
| 11 Feb 2026, 09:24 | 8.15 | 8.15 |
| 26 Jan 2026, 11:06 | 8.17 | 8.17 |
| 10 Dec 2025, 08:20 | 7.82 | 7.82 |
| 3 Nov 2025, 08:10 | 8.09 | 8.09 |
| 13 Oct 2025, 11:51 | 8.12 | 8.12 |
| 4 Sep 2025, 12:27 | 8.17 | 8.17 |
| 5 Aug 2025, 12:40 | 8.3 | 8.3 |
| 2 Jul 2025, 09:19 | 7.93 | 7.93 |
| 5 Jun 2025, 09:18 | 8.11 | 8.11 |
| 9 May 2025, 08:58 | 8.12 | 8.12 |
| 10 Apr 2025, 09:36 | 8.07 | 8.07 |
| 22 Jan 2025, 12:11 | 8.11 | 8.11 |
| 4 Dec 2024, 08:50 | 8.06 | 8.06 |
| 18 Nov 2024, 11:27 | 8.06 | 8.06 |
| 14 Oct 2024, 11:30 | 8.13 | 8.13 |
| 19 Sep 2024, 08:49 | 7.91 | 7.91 |
| 22 Jul 2024, 13:04 | 8.16 | 8.16 |
| 18 Jun 2024, 14:13 | 8.27 | 8.27 |
| 20 May 2024, 08:47 | 8.07 | 8.07 |
| 15 Apr 2024, 11:39 | 8 | 8 |
| 18 Mar 2024, 09:16 | 7.99 | 7.99 |
| 19 Feb 2024, 11:08 | 7.87 | 7.87 |
| 16 Jan 2024, 13:31 | 7.99 | 7.99 |
| 5 Dec 2023, 12:53 | 7.92 | 7.92 |
| 20 Nov 2023, 09:22 | 7.85 | 7.85 |
| 16 Oct 2023, 12:17 | 8.08 | 8.08 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
below 0.03 mg/l (not detected above this)
Sampled 16 Mar 2026, 7 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 09:38 | <0.03 | below 0.03 mg/l (not detected above this) |
| 11 Feb 2026, 09:24 | 0.049 | 0.049 mg/l |
| 26 Jan 2026, 11:06 | 0.046 | 0.046 mg/l |
| 10 Dec 2025, 08:20 | 0.05 | 0.05 mg/l |
| 3 Nov 2025, 08:10 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 Oct 2025, 11:51 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Sep 2025, 12:27 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Aug 2025, 12:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 2 Jul 2025, 09:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Jun 2025, 09:18 | <0.03 | below 0.03 mg/l (not detected above this) |
| 9 May 2025, 08:58 | <0.03 | below 0.03 mg/l (not detected above this) |
| 10 Apr 2025, 09:36 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jan 2025, 12:11 | 0.066 | 0.066 mg/l |
| 4 Dec 2024, 08:50 | 0.07 | 0.07 mg/l |
| 18 Nov 2024, 11:27 | 0.043 | 0.043 mg/l |
| 14 Oct 2024, 11:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Sep 2024, 08:49 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jul 2024, 13:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Jun 2024, 14:13 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 May 2024, 08:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Apr 2024, 11:39 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Mar 2024, 09:16 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Feb 2024, 11:08 | 0.03 | 0.03 mg/l |
| 16 Jan 2024, 13:31 | 0.055 | 0.055 mg/l |
| 20 Nov 2023, 09:22 | 0.032 | 0.032 mg/l |
| 16 Oct 2023, 12:17 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
8.98 mg/l
Sampled 16 Mar 2026, 7 months ago · 25 results banked
Every result (25)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 09:38 | 8.98 | 8.98 mg/l |
| 11 Feb 2026, 09:24 | 9.47 | 9.47 mg/l |
| 26 Jan 2026, 11:06 | 9.37 | 9.37 mg/l |
| 10 Dec 2025, 08:20 | 8.43 | 8.43 mg/l |
| 3 Nov 2025, 08:10 | 8.66 | 8.66 mg/l |
| 13 Oct 2025, 11:51 | 8.66 | 8.66 mg/l |
| 4 Sep 2025, 12:27 | 7.88 | 7.88 mg/l |
| 5 Aug 2025, 12:40 | 8.08 | 8.08 mg/l |
| 2 Jul 2025, 09:19 | 8.28 | 8.28 mg/l |
| 5 Jun 2025, 09:18 | 8.76 | 8.76 mg/l |
| 9 May 2025, 08:58 | 8.76 | 8.76 mg/l |
| 10 Apr 2025, 09:36 | 9.27 | 9.27 mg/l |
| 22 Jan 2025, 12:11 | 9.56 | 9.56 mg/l |
| 18 Nov 2024, 11:27 | 9.13 | 9.13 mg/l |
| 14 Oct 2024, 11:30 | 8.46 | 8.46 mg/l |
| 19 Sep 2024, 08:49 | 8.56 | 8.56 mg/l |
| 22 Jul 2024, 13:04 | 8.06 | 8.06 mg/l |
| 18 Jun 2024, 14:13 | 8.46 | 8.46 mg/l |
| 20 May 2024, 08:47 | 8.46 | 8.46 mg/l |
| 15 Apr 2024, 11:39 | 9.17 | 9.17 mg/l |
| 18 Mar 2024, 09:16 | 9.08 | 9.08 mg/l |
| 19 Feb 2024, 11:08 | 5.78 | 5.78 mg/l |
| 16 Jan 2024, 13:31 | 9.47 | 9.47 mg/l |
| 20 Nov 2023, 09:22 | 6.85 | 6.85 mg/l |
| 16 Oct 2023, 12:17 | 7.75 | 7.75 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.03 mg/l
Sampled 16 Mar 2026, 7 months ago · 26 results banked
Every result (26)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 09:38 | 0.03 | 0.03 mg/l |
| 11 Feb 2026, 09:24 | 0.048 | 0.048 mg/l |
| 26 Jan 2026, 11:06 | 0.047 | 0.047 mg/l |
| 10 Dec 2025, 08:20 | 0.063 | 0.063 mg/l |
| 3 Nov 2025, 08:10 | 0.035 | 0.035 mg/l |
| 13 Oct 2025, 11:51 | 0.034 | 0.034 mg/l |
| 4 Sep 2025, 12:27 | 0.036 | 0.036 mg/l |
| 5 Aug 2025, 12:40 | 0.02 | 0.02 mg/l |
| 2 Jul 2025, 09:19 | 0.031 | 0.031 mg/l |
| 5 Jun 2025, 09:18 | 0.033 | 0.033 mg/l |
| 9 May 2025, 08:58 | 0.016 | 0.016 mg/l |
| 10 Apr 2025, 09:36 | <0.01 | below 0.01 mg/l (not detected above this) |
| 22 Jan 2025, 12:11 | 0.048 | 0.048 mg/l |
| 4 Dec 2024, 08:50 | 0.047 | 0.047 mg/l |
| 18 Nov 2024, 11:27 | 0.043 | 0.043 mg/l |
| 14 Oct 2024, 11:30 | 0.025 | 0.025 mg/l |
| 19 Sep 2024, 08:49 | 0.033 | 0.033 mg/l |
| 22 Jul 2024, 13:04 | 0.032 | 0.032 mg/l |
| 18 Jun 2024, 14:13 | 0.027 | 0.027 mg/l |
| 20 May 2024, 08:47 | 0.038 | 0.038 mg/l |
| 15 Apr 2024, 11:39 | 0.021 | 0.021 mg/l |
| 18 Mar 2024, 09:16 | 0.039 | 0.039 mg/l |
| 19 Feb 2024, 11:08 | 0.074 | 0.074 mg/l |
| 16 Jan 2024, 13:31 | 0.053 | 0.053 mg/l |
| 20 Nov 2023, 09:22 | 0.075 | 0.075 mg/l |
| 16 Oct 2023, 12:17 | 0.046 | 0.046 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
680 µS/cm
Sampled 16 Mar 2026, 7 months ago · 27 results banked
Every result (27)
| Sampled | Result as published | Reads as |
|---|---|---|
| 16 Mar 2026, 09:38 | 680 | 680 µS/cm |
| 11 Feb 2026, 09:24 | 689 | 689 µS/cm |
| 26 Jan 2026, 11:06 | 690 | 690 µS/cm |
| 10 Dec 2025, 08:20 | 673 | 673 µS/cm |
| 3 Nov 2025, 08:10 | 666 | 666 µS/cm |
| 13 Oct 2025, 11:51 | 661 | 661 µS/cm |
| 4 Sep 2025, 12:27 | 625 | 625 µS/cm |
| 5 Aug 2025, 12:40 | 610 | 610 µS/cm |
| 2 Jul 2025, 09:19 | 635 | 635 µS/cm |
| 5 Jun 2025, 09:18 | 632 | 632 µS/cm |
| 9 May 2025, 08:58 | 656 | 656 µS/cm |
| 10 Apr 2025, 09:36 | 675 | 675 µS/cm |
| 22 Jan 2025, 12:11 | 712 | 712 µS/cm |
| 4 Dec 2024, 08:50 | 688 | 688 µS/cm |
| 18 Nov 2024, 11:27 | 682 | 682 µS/cm |
| 14 Oct 2024, 11:30 | 677 | 677 µS/cm |
| 19 Sep 2024, 08:49 | 682 | 682 µS/cm |
| 22 Jul 2024, 13:04 | 660 | 660 µS/cm |
| 18 Jun 2024, 14:13 | 671 | 671 µS/cm |
| 20 May 2024, 08:47 | 663 | 663 µS/cm |
| 15 Apr 2024, 11:39 | 683 | 683 µS/cm |
| 18 Mar 2024, 09:16 | 695 | 695 µS/cm |
| 19 Feb 2024, 11:08 | 563 | 563 µS/cm |
| 16 Jan 2024, 13:31 | 701 | 701 µS/cm |
| 5 Dec 2023, 12:53 | 676 | 676 µS/cm |
| 20 Nov 2023, 09:22 | 634 | 634 µS/cm |
| 16 Oct 2023, 12:17 | 645 | 645 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 | 27 | Oct 2023 – Mar 2026 | 99.3% 16 Mar 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 27 | Oct 2023 – Mar 2026 | 11.8 mg/l 16 Mar 2026 |
| Temperature of Water 0076 | River water | 27 | Oct 2023 – Mar 2026 | 7.8 °C 16 Mar 2026 |
| pH 0061 | River water | 27 | Oct 2023 – Mar 2026 | 8.22 16 Mar 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 26 | Oct 2023 – Mar 2026 | below 0.03 mg/l 16 Mar 2026 |
| Nitrate as N 0117 | River water | 25 | Oct 2023 – Mar 2026 | 8.98 mg/l 16 Mar 2026 |
| Orthophosphate, reactive as P 0180 | River water | 26 | Oct 2023 – Mar 2026 | 0.03 mg/l 16 Mar 2026 |
| Conductivity at 25 C 0077 | River water | 27 | Oct 2023 – Mar 2026 | 680 µS/cm 16 Mar 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 26 | Oct 2023 – Mar 2026 | 240 mg/l 16 Mar 2026 |
| Ammonia un-ionised as N 0119 | River water | 26 | Oct 2023 – Mar 2026 | below 0.00047 mg/l 16 Mar 2026 |
| BOD : 5 Day ATU 0085 | River water | 11 | Feb 2024 – Jan 2025 | 1.7 mg/l 22 Jan 2025 |
| Nitrite as N 0118 | River water | 26 | Oct 2023 – Mar 2026 | 0.019 mg/l 16 Mar 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 25 | Oct 2023 – Mar 2026 | 9 mg/l 16 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.