River Nar B1145 Road Bridge Mileham
EA name: R.NAR B1145 RD.BR.MILEHAM
Environment Agency sampling point AN-58M02 · 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
- 3 Apr 2025, 09:4118 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
- 19 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 590600, 318800As 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, 11 m from the line.
- Next gauge downstream
- Marham On the River Nar · 25 km along the river
- Why it was sampled
- Monitoring (national agency policy) (19 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
88.2%
Sampled 3 Apr 2025, 18 months ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Apr 2025, 09:41 | 88.2 | 88.2% |
| 4 Mar 2025, 09:04 | 90.4 | 90.4% |
| 13 Feb 2025, 11:46 | 84 | 84% |
| 27 Jan 2025, 11:15 | 90.2 | 90.2% |
| 10 Dec 2024, 10:02 | 80.3 | 80.3% |
| 18 Nov 2024, 10:53 | 84.2 | 84.2% |
| 18 Oct 2024, 08:38 | 81.7 | 81.7% |
| 19 Sep 2024, 09:32 | 86.2 | 86.2% |
| 19 Aug 2024, 10:46 | 81.7 | 81.7% |
| 22 Jul 2024, 10:40 | 71.3 | 71.3% |
| 20 Jun 2024, 09:53 | 73.5 | 73.5% |
| 20 May 2024, 09:30 | 71.1 | 71.1% |
| 15 Apr 2024, 10:32 | 82.6 | 82.6% |
| 18 Mar 2024, 09:55 | 103.1 | 103.1% |
| 19 Feb 2024, 10:29 | 87.6 | 87.6% |
| 16 Jan 2024, 09:54 | 85.3 | 85.3% |
| 5 Dec 2023, 11:07 | 84.4 | 84.4% |
| 20 Nov 2023, 10:04 | 80.7 | 80.7% |
| 16 Oct 2023, 11:35 | 84.2 | 84.2% |
Dissolved oxygen
as O2 · code 9924 · mg/l
10.3 mg/l
Sampled 3 Apr 2025, 18 months ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Apr 2025, 09:41 | 10.3 | 10.3 mg/l |
| 4 Mar 2025, 09:04 | 11.8 | 11.8 mg/l |
| 13 Feb 2025, 11:46 | 10.4 | 10.4 mg/l |
| 27 Jan 2025, 11:15 | 11.2 | 11.2 mg/l |
| 10 Dec 2024, 10:02 | 9.69 | 9.69 mg/l |
| 18 Nov 2024, 10:53 | 10.2 | 10.2 mg/l |
| 18 Oct 2024, 08:38 | 9.34 | 9.34 mg/l |
| 19 Sep 2024, 09:32 | 8.92 | 8.92 mg/l |
| 19 Aug 2024, 10:46 | 8.67 | 8.67 mg/l |
| 22 Jul 2024, 10:40 | 7.28 | 7.28 mg/l |
| 20 Jun 2024, 09:53 | 7.89 | 7.89 mg/l |
| 20 May 2024, 09:30 | 7.56 | 7.56 mg/l |
| 15 Apr 2024, 10:32 | 9.33 | 9.33 mg/l |
| 18 Mar 2024, 09:55 | 11.6 | 11.6 mg/l |
| 19 Feb 2024, 10:29 | 10.2 | 10.2 mg/l |
| 16 Jan 2024, 09:54 | 11.4 | 11.4 mg/l |
| 5 Dec 2023, 11:07 | 10.4 | 10.4 mg/l |
| 20 Nov 2023, 10:04 | 9.25 | 9.25 mg/l |
| 16 Oct 2023, 11:35 | 9.69 | 9.69 mg/l |
Water temperature
code 0076 · °C
8.6 °C
Sampled 3 Apr 2025, 18 months ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Apr 2025, 09:41 | 8.6 | 8.6 °C |
| 4 Mar 2025, 09:04 | 4.1 | 4.1 °C |
| 13 Feb 2025, 11:46 | 6 | 6 °C |
| 27 Jan 2025, 11:15 | 6.2 | 6.2 °C |
| 10 Dec 2024, 10:02 | 7.2 | 7.2 °C |
| 18 Nov 2024, 10:53 | 6.9 | 6.9 °C |
| 18 Oct 2024, 08:38 | 9.4 | 9.4 °C |
| 19 Sep 2024, 09:32 | 13.7 | 13.7 °C |
| 19 Aug 2024, 10:46 | 12.6 | 12.6 °C |
| 22 Jul 2024, 10:40 | 14.3 | 14.3 °C |
| 20 Jun 2024, 09:53 | 12.1 | 12.1 °C |
| 20 May 2024, 09:30 | 12.5 | 12.5 °C |
| 15 Apr 2024, 10:32 | 9.9 | 9.9 °C |
| 18 Mar 2024, 09:55 | 9.9 | 9.9 °C |
| 19 Feb 2024, 10:29 | 8.8 | 8.8 °C |
| 16 Jan 2024, 09:54 | 3.1 | 3.1 °C |
| 5 Dec 2023, 11:07 | 6.4 | 6.4 °C |
| 20 Nov 2023, 10:04 | 9.3 | 9.3 °C |
| 16 Oct 2023, 11:35 | 9.1 | 9.1 °C |
pH
code 0061
7.78
Sampled 3 Apr 2025, 18 months ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Apr 2025, 09:41 | 7.78 | 7.78 |
| 4 Mar 2025, 09:04 | 7.87 | 7.87 |
| 13 Feb 2025, 11:46 | 7.85 | 7.85 |
| 27 Jan 2025, 11:15 | 7.8 | 7.8 |
| 10 Dec 2024, 10:02 | 7.9 | 7.9 |
| 18 Nov 2024, 10:53 | 7.61 | 7.61 |
| 18 Oct 2024, 08:38 | 7.72 | 7.72 |
| 19 Sep 2024, 09:32 | 7.65 | 7.65 |
| 19 Aug 2024, 10:46 | 7.48 | 7.48 |
| 22 Jul 2024, 10:40 | 7.56 | 7.56 |
| 20 Jun 2024, 09:53 | 7.53 | 7.53 |
| 20 May 2024, 09:30 | 7.51 | 7.51 |
| 15 Apr 2024, 10:32 | 7.59 | 7.59 |
| 18 Mar 2024, 09:55 | 7.79 | 7.79 |
| 19 Feb 2024, 10:29 | 7.81 | 7.81 |
| 16 Jan 2024, 09:54 | 7.71 | 7.71 |
| 5 Dec 2023, 11:07 | 7.83 | 7.83 |
| 20 Nov 2023, 10:04 | 7.76 | 7.76 |
| 16 Oct 2023, 11:35 | 7.61 | 7.61 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.032 mg/l
Sampled 3 Apr 2025, 18 months ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Apr 2025, 09:41 | 0.032 | 0.032 mg/l |
| 4 Mar 2025, 09:04 | 0.041 | 0.041 mg/l |
| 13 Feb 2025, 11:46 | 0.081 | 0.081 mg/l |
| 27 Jan 2025, 11:15 | 0.055 | 0.055 mg/l |
| 10 Dec 2024, 10:02 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Nov 2024, 10:53 | 0.083 | 0.083 mg/l |
| 18 Oct 2024, 08:38 | 0.04 | 0.04 mg/l |
| 19 Sep 2024, 09:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Aug 2024, 10:46 | <0.03 | below 0.03 mg/l (not detected above this) |
| 22 Jul 2024, 10:40 | 0.032 | 0.032 mg/l |
| 20 Jun 2024, 09:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 May 2024, 09:30 | <0.03 | below 0.03 mg/l (not detected above this) |
| 15 Apr 2024, 10:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Mar 2024, 09:55 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Feb 2024, 10:29 | 0.053 | 0.053 mg/l |
| 16 Jan 2024, 09:54 | 0.043 | 0.043 mg/l |
| 5 Dec 2023, 11:07 | <0.03 | below 0.03 mg/l (not detected above this) |
| 20 Nov 2023, 10:04 | <0.03 | below 0.03 mg/l (not detected above this) |
| 16 Oct 2023, 11:35 | 0.037 | 0.037 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
4.69 mg/l
Sampled 3 Apr 2025, 18 months ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Apr 2025, 09:41 | 4.69 | 4.69 mg/l |
| 4 Mar 2025, 09:04 | 5.79 | 5.79 mg/l |
| 13 Feb 2025, 11:46 | 5.38 | 5.38 mg/l |
| 27 Jan 2025, 11:15 | 5.28 | 5.28 mg/l |
| 10 Dec 2024, 10:02 | 5.76 | 5.76 mg/l |
| 18 Nov 2024, 10:53 | 2.98 | 2.98 mg/l |
| 18 Oct 2024, 08:38 | 2.88 | 2.88 mg/l |
| 19 Sep 2024, 09:32 | 3.88 | 3.88 mg/l |
| 19 Aug 2024, 10:46 | 3.69 | 3.69 mg/l |
| 22 Jul 2024, 10:40 | 2.77 | 2.77 mg/l |
| 20 Jun 2024, 09:53 | 2.98 | 2.98 mg/l |
| 20 May 2024, 09:30 | 3.16 | 3.16 mg/l |
| 15 Apr 2024, 10:32 | 3.78 | 3.78 mg/l |
| 18 Mar 2024, 09:55 | 4.98 | 4.98 mg/l |
| 19 Feb 2024, 10:29 | 3.98 | 3.98 mg/l |
| 16 Jan 2024, 09:54 | 6.47 | 6.47 mg/l |
| 5 Dec 2023, 11:07 | 6.57 | 6.57 mg/l |
| 20 Nov 2023, 10:04 | 6.56 | 6.56 mg/l |
| 16 Oct 2023, 11:35 | 2.79 | 2.79 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.082 mg/l
Sampled 3 Apr 2025, 18 months ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Apr 2025, 09:41 | 0.082 | 0.082 mg/l |
| 4 Mar 2025, 09:04 | 0.066 | 0.066 mg/l |
| 13 Feb 2025, 11:46 | 0.09 | 0.09 mg/l |
| 27 Jan 2025, 11:15 | 0.083 | 0.083 mg/l |
| 10 Dec 2024, 10:02 | 0.17 | 0.17 mg/l |
| 18 Nov 2024, 10:53 | 0.089 | 0.089 mg/l |
| 18 Oct 2024, 08:38 | 0.085 | 0.085 mg/l |
| 19 Sep 2024, 09:32 | 0.091 | 0.091 mg/l |
| 19 Aug 2024, 10:46 | 0.091 | 0.091 mg/l |
| 22 Jul 2024, 10:40 | 0.089 | 0.089 mg/l |
| 20 Jun 2024, 09:53 | 0.074 | 0.074 mg/l |
| 20 May 2024, 09:30 | 0.064 | 0.064 mg/l |
| 15 Apr 2024, 10:32 | 0.057 | 0.057 mg/l |
| 18 Mar 2024, 09:55 | 0.079 | 0.079 mg/l |
| 19 Feb 2024, 10:29 | 0.14 | 0.14 mg/l |
| 16 Jan 2024, 09:54 | 0.12 | 0.12 mg/l |
| 5 Dec 2023, 11:07 | 0.12 | 0.12 mg/l |
| 20 Nov 2023, 10:04 | 0.13 | 0.13 mg/l |
| 16 Oct 2023, 11:35 | 0.081 | 0.081 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
680 µS/cm
Sampled 3 Apr 2025, 18 months ago · 19 results banked
Every result (19)
| Sampled | Result as published | Reads as |
|---|---|---|
| 3 Apr 2025, 09:41 | 680 | 680 µS/cm |
| 4 Mar 2025, 09:04 | 673 | 673 µS/cm |
| 13 Feb 2025, 11:46 | 669 | 669 µS/cm |
| 27 Jan 2025, 11:15 | 651 | 651 µS/cm |
| 10 Dec 2024, 10:02 | 522 | 522 µS/cm |
| 18 Nov 2024, 10:53 | 707 | 707 µS/cm |
| 18 Oct 2024, 08:38 | 684 | 684 µS/cm |
| 19 Sep 2024, 09:32 | 687 | 687 µS/cm |
| 19 Aug 2024, 10:46 | 668 | 668 µS/cm |
| 22 Jul 2024, 10:40 | 667 | 667 µS/cm |
| 20 Jun 2024, 09:53 | 687 | 687 µS/cm |
| 20 May 2024, 09:30 | 688 | 688 µS/cm |
| 15 Apr 2024, 10:32 | 677 | 677 µS/cm |
| 18 Mar 2024, 09:55 | 678 | 678 µS/cm |
| 19 Feb 2024, 10:29 | 490 | 490 µS/cm |
| 16 Jan 2024, 09:54 | 690 | 690 µS/cm |
| 5 Dec 2023, 11:07 | 621 | 621 µS/cm |
| 20 Nov 2023, 10:04 | 617 | 617 µS/cm |
| 16 Oct 2023, 11:35 | 691 | 691 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 | 19 | Oct 2023 – Apr 2025 | 88.2% 3 Apr 2025 |
| Oxygen, Dissolved as O2 9924 | River water | 19 | Oct 2023 – Apr 2025 | 10.3 mg/l 3 Apr 2025 |
| Temperature of Water 0076 | River water | 19 | Oct 2023 – Apr 2025 | 8.6 °C 3 Apr 2025 |
| pH 0061 | River water | 19 | Oct 2023 – Apr 2025 | 7.78 3 Apr 2025 |
| Ammoniacal Nitrogen as N 0111 | River water | 19 | Oct 2023 – Apr 2025 | 0.032 mg/l 3 Apr 2025 |
| Nitrate as N 0117 | River water | 19 | Oct 2023 – Apr 2025 | 4.69 mg/l 3 Apr 2025 |
| Orthophosphate, reactive as P 0180 | River water | 19 | Oct 2023 – Apr 2025 | 0.082 mg/l 3 Apr 2025 |
| Conductivity at 25 C 0077 | River water | 19 | Oct 2023 – Apr 2025 | 680 µS/cm 3 Apr 2025 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 19 | Oct 2023 – Apr 2025 | 290 mg/l 3 Apr 2025 |
| Ammonia un-ionised as N 0119 | River water | 19 | Oct 2023 – Apr 2025 | 0.00032 mg/l 3 Apr 2025 |
| BOD : 5 Day ATU 0085 | River water | 15 | Feb 2024 – Apr 2025 | 1.3 mg/l 3 Apr 2025 |
| Nitrite as N 0118 | River water | 19 | Oct 2023 – Apr 2025 | 0.011 mg/l 3 Apr 2025 |
| Nitrogen, Total Oxidised as N 0116 | River water | 19 | Oct 2023 – Apr 2025 | 4.7 mg/l 3 Apr 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.