River Nar By-Pass Bridge Kings Lynn
EA name: R.NAR BY-PASS BRIDGE KINGS LYNN
Environment Agency sampling point AN-58M11 · 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
- 24 Feb 2026, 11:497 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
- 21 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 562135, 318111As published, to the nearest 1 m. Open in a map
- River, by its own name
- Nar
- River, by the map
- River NarPlaced on the river its name gives, 3 m from the line.
- Next gauge downstream
- King's Lynn On the River Great Ouse · 2.0 km along the river
- Nearest gauge upstream
- Setchey Bridge On the River Nar · 6.2 km along the river
- Why it was sampled
- Monitoring (national agency policy) (21 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
88.6%
Sampled 24 Feb 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Feb 2026, 11:49 | 88.6 | 88.6% |
| 22 Jan 2026, 10:43 | 87.4 | 87.4% |
| 17 Nov 2025, 13:13 | 63.8 | 63.8% |
| 3 Nov 2025, 12:48 | 92 | 92% |
| 5 Mar 2025, 10:54 | 95.5 | 95.5% |
| 22 Jan 2025, 13:12 | 90 | 90% |
| 5 Dec 2024, 14:57 | 86.8 | 86.8% |
| 18 Nov 2024, 13:34 | 89.5 | 89.5% |
| 14 Oct 2024, 12:53 | 98 | 98% |
| 19 Sep 2024, 13:24 | 81.5 | 81.5% |
| 19 Aug 2024, 13:32 | 116.1 | 116.1% |
| 17 Jul 2024, 10:21 | 87.3 | 87.3% |
| 21 Jun 2024, 11:37 | 130 | 130% |
| 13 May 2024, 09:24 | 78.7 | 78.7% |
| 16 Apr 2024, 09:35 | 97.2 | 97.2% |
| 18 Mar 2024, 12:48 | 95.5 | 95.5% |
| 19 Feb 2024, 13:08 | 91.2 | 91.2% |
| 15 Jan 2024, 12:14 | 89.4 | 89.4% |
| 5 Dec 2023, 14:07 | 79.8 | 79.8% |
| 16 Nov 2023, 08:59 | 77.3 | 77.3% |
| 16 Oct 2023, 14:37 | 86.6 | 86.6% |
Dissolved oxygen
as O2 · code 9924 · mg/l
9.93 mg/l
Sampled 24 Feb 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Feb 2026, 11:49 | 9.93 | 9.93 mg/l |
| 22 Jan 2026, 10:43 | 10.5 | 10.5 mg/l |
| 17 Nov 2025, 13:13 | 7.38 | 7.38 mg/l |
| 3 Nov 2025, 12:48 | 10.2 | 10.2 mg/l |
| 5 Mar 2025, 10:54 | 11.6 | 11.6 mg/l |
| 22 Jan 2025, 13:12 | 11.4 | 11.4 mg/l |
| 5 Dec 2024, 14:57 | 10.3 | 10.3 mg/l |
| 18 Nov 2024, 13:34 | 10.8 | 10.8 mg/l |
| 14 Oct 2024, 12:53 | 11.3 | 11.3 mg/l |
| 19 Sep 2024, 13:24 | 8.02 | 8.02 mg/l |
| 19 Aug 2024, 13:32 | 10.8 | 10.8 mg/l |
| 17 Jul 2024, 10:21 | 8.54 | 8.54 mg/l |
| 21 Jun 2024, 11:37 | 12.3 | 12.3 mg/l |
| 13 May 2024, 09:24 | 7.85 | 7.85 mg/l |
| 16 Apr 2024, 09:35 | 11.1 | 11.1 mg/l |
| 18 Mar 2024, 12:48 | 10.4 | 10.4 mg/l |
| 19 Feb 2024, 13:08 | 10.2 | 10.2 mg/l |
| 15 Jan 2024, 12:14 | 11.9 | 11.9 mg/l |
| 5 Dec 2023, 14:07 | 10 | 10 mg/l |
| 16 Nov 2023, 08:59 | 9.1 | 9.1 mg/l |
| 16 Oct 2023, 14:37 | 9.69 | 9.69 mg/l |
Water temperature
code 0076 · °C
10.2 °C
Sampled 24 Feb 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Feb 2026, 11:49 | 10.2 | 10.2 °C |
| 22 Jan 2026, 10:43 | 7.3 | 7.3 °C |
| 17 Nov 2025, 13:13 | 8.9 | 8.9 °C |
| 3 Nov 2025, 12:48 | 10.7 | 10.7 °C |
| 5 Mar 2025, 10:54 | 6.8 | 6.8 °C |
| 22 Jan 2025, 13:12 | 5.4 | 5.4 °C |
| 5 Dec 2024, 14:57 | 8 | 8 °C |
| 18 Nov 2024, 13:34 | 7.3 | 7.3 °C |
| 14 Oct 2024, 12:53 | 9.1 | 9.1 °C |
| 19 Sep 2024, 13:24 | 16 | 16 °C |
| 19 Aug 2024, 13:32 | 18.7 | 18.7 °C |
| 17 Jul 2024, 10:21 | 16.3 | 16.3 °C |
| 21 Jun 2024, 11:37 | 17.8 | 17.8 °C |
| 13 May 2024, 09:24 | 15.4 | 15.4 °C |
| 16 Apr 2024, 09:35 | 9.3 | 9.3 °C |
| 18 Mar 2024, 12:48 | 11.3 | 11.3 °C |
| 19 Feb 2024, 13:08 | 10.4 | 10.4 °C |
| 15 Jan 2024, 12:14 | 3.5 | 3.5 °C |
| 5 Dec 2023, 14:07 | 5.7 | 5.7 °C |
| 16 Nov 2023, 08:59 | 8.2 | 8.2 °C |
| 16 Oct 2023, 14:37 | 10.3 | 10.3 °C |
pH
code 0061
7.98
Sampled 24 Feb 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Feb 2026, 11:49 | 7.98 | 7.98 |
| 22 Jan 2026, 10:43 | 7.92 | 7.92 |
| 17 Nov 2025, 13:13 | 7.57 | 7.57 |
| 3 Nov 2025, 12:48 | 8.04 | 8.04 |
| 5 Mar 2025, 10:54 | 8.14 | 8.14 |
| 22 Jan 2025, 13:12 | 7.96 | 7.96 |
| 5 Dec 2024, 14:57 | 7.95 | 7.95 |
| 18 Nov 2024, 13:34 | 8 | 8 |
| 14 Oct 2024, 12:53 | 8.11 | 8.11 |
| 19 Sep 2024, 13:24 | 7.82 | 7.82 |
| 19 Aug 2024, 13:32 | 8.04 | 8.04 |
| 17 Jul 2024, 10:21 | 7.96 | 7.96 |
| 21 Jun 2024, 11:37 | 8.35 | 8.35 |
| 13 May 2024, 09:24 | 7.63 | 7.63 |
| 16 Apr 2024, 09:35 | 8.13 | 8.13 |
| 18 Mar 2024, 12:48 | 8.01 | 8.01 |
| 19 Feb 2024, 13:08 | 7.64 | 7.64 |
| 15 Jan 2024, 12:14 | 7.65 | 7.65 |
| 5 Dec 2023, 14:07 | 7.58 | 7.58 |
| 16 Nov 2023, 08:59 | 7.74 | 7.74 |
| 16 Oct 2023, 14:37 | 7.94 | 7.94 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.076 mg/l
Sampled 24 Feb 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Feb 2026, 11:49 | 0.076 | 0.076 mg/l |
| 22 Jan 2026, 10:43 | 0.18 | 0.18 mg/l |
| 17 Nov 2025, 13:13 | 0.18 | 0.18 mg/l |
| 3 Nov 2025, 12:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 5 Mar 2025, 10:54 | 0.053 | 0.053 mg/l |
| 22 Jan 2025, 13:12 | 0.11 | 0.11 mg/l |
| 5 Dec 2024, 14:57 | 0.053 | 0.053 mg/l |
| 18 Nov 2024, 13:34 | <0.03 | below 0.03 mg/l (not detected above this) |
| 14 Oct 2024, 12:53 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Sep 2024, 13:24 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Aug 2024, 13:32 | <0.03 | below 0.03 mg/l (not detected above this) |
| 17 Jul 2024, 10:21 | <0.03 | below 0.03 mg/l (not detected above this) |
| 21 Jun 2024, 11:37 | <0.03 | below 0.03 mg/l (not detected above this) |
| 13 May 2024, 09:24 | 0.12 | 0.12 mg/l |
| 16 Apr 2024, 09:35 | <0.03 | below 0.03 mg/l (not detected above this) |
| 18 Mar 2024, 12:48 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Feb 2024, 13:08 | 0.13 | 0.13 mg/l |
| 15 Jan 2024, 12:14 | 0.22 | 0.22 mg/l |
| 5 Dec 2023, 14:07 | 0.16 | 0.16 mg/l |
| 16 Nov 2023, 08:59 | 0.07 | 0.07 mg/l |
| 16 Oct 2023, 14:37 | <0.03 | below 0.03 mg/l (not detected above this) |
Nitrate
as nitrogen (N) · code 0117 · mg/l
9.96 mg/l
Sampled 24 Feb 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Feb 2026, 11:49 | 9.96 | 9.96 mg/l |
| 22 Jan 2026, 10:43 | 9.94 | 9.94 mg/l |
| 17 Nov 2025, 13:13 | 6.54 | 6.54 mg/l |
| 3 Nov 2025, 12:48 | 7.57 | 7.57 mg/l |
| 5 Mar 2025, 10:54 | 8.98 | 8.98 mg/l |
| 22 Jan 2025, 13:12 | 8.56 | 8.56 mg/l |
| 5 Dec 2024, 14:57 | 7.93 | 7.93 mg/l |
| 18 Nov 2024, 13:34 | 8.65 | 8.65 mg/l |
| 14 Oct 2024, 12:53 | 8.17 | 8.17 mg/l |
| 19 Sep 2024, 13:24 | 7.25 | 7.25 mg/l |
| 19 Aug 2024, 13:32 | 6.26 | 6.26 mg/l |
| 17 Jul 2024, 10:21 | 6.17 | 6.17 mg/l |
| 21 Jun 2024, 11:37 | 7.08 | 7.08 mg/l |
| 13 May 2024, 09:24 | 9.62 | 9.62 mg/l |
| 16 Apr 2024, 09:35 | 9.08 | 9.08 mg/l |
| 18 Mar 2024, 12:48 | 8.98 | 8.98 mg/l |
| 19 Feb 2024, 13:08 | 7.17 | 7.17 mg/l |
| 15 Jan 2024, 12:14 | 5.97 | 5.97 mg/l |
| 5 Dec 2023, 14:07 | 9.14 | 9.14 mg/l |
| 16 Nov 2023, 08:59 | 8.35 | 8.35 mg/l |
| 16 Oct 2023, 14:37 | 6.47 | 6.47 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.035 mg/l
Sampled 24 Feb 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Feb 2026, 11:49 | 0.035 | 0.035 mg/l |
| 22 Jan 2026, 10:43 | 0.041 | 0.041 mg/l |
| 17 Nov 2025, 13:13 | 0.082 | 0.082 mg/l |
| 3 Nov 2025, 12:48 | 0.032 | 0.032 mg/l |
| 5 Mar 2025, 10:54 | 0.027 | 0.027 mg/l |
| 22 Jan 2025, 13:12 | 0.041 | 0.041 mg/l |
| 5 Dec 2024, 14:57 | 0.04 | 0.04 mg/l |
| 18 Nov 2024, 13:34 | 0.039 | 0.039 mg/l |
| 14 Oct 2024, 12:53 | 0.025 | 0.025 mg/l |
| 19 Sep 2024, 13:24 | 0.022 | 0.022 mg/l |
| 19 Aug 2024, 13:32 | <0.01 | below 0.01 mg/l (not detected above this) |
| 17 Jul 2024, 10:21 | 0.023 | 0.023 mg/l |
| 21 Jun 2024, 11:37 | 0.013 | 0.013 mg/l |
| 13 May 2024, 09:24 | 0.058 | 0.058 mg/l |
| 16 Apr 2024, 09:35 | 0.017 | 0.017 mg/l |
| 18 Mar 2024, 12:48 | 0.036 | 0.036 mg/l |
| 19 Feb 2024, 13:08 | 0.056 | 0.056 mg/l |
| 15 Jan 2024, 12:14 | 0.049 | 0.049 mg/l |
| 5 Dec 2023, 14:07 | 0.041 | 0.041 mg/l |
| 16 Nov 2023, 08:59 | 0.039 | 0.039 mg/l |
| 16 Oct 2023, 14:37 | 0.056 | 0.056 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
783 µS/cm
Sampled 24 Feb 2026, 7 months ago · 21 results banked
Every result (21)
| Sampled | Result as published | Reads as |
|---|---|---|
| 24 Feb 2026, 11:49 | 783 | 783 µS/cm |
| 22 Jan 2026, 10:43 | 811 | 811 µS/cm |
| 17 Nov 2025, 13:13 | 722 | 722 µS/cm |
| 3 Nov 2025, 12:48 | 678 | 678 µS/cm |
| 5 Mar 2025, 10:54 | 726 | 726 µS/cm |
| 22 Jan 2025, 13:12 | 762 | 762 µS/cm |
| 5 Dec 2024, 14:57 | 748 | 748 µS/cm |
| 18 Nov 2024, 13:34 | 682 | 682 µS/cm |
| 14 Oct 2024, 12:53 | 680 | 680 µS/cm |
| 19 Sep 2024, 13:24 | 690 | 690 µS/cm |
| 19 Aug 2024, 13:32 | 659 | 659 µS/cm |
| 17 Jul 2024, 10:21 | 670 | 670 µS/cm |
| 21 Jun 2024, 11:37 | 664 | 664 µS/cm |
| 13 May 2024, 09:24 | 716 | 716 µS/cm |
| 16 Apr 2024, 09:35 | 717 | 717 µS/cm |
| 18 Mar 2024, 12:48 | 694 | 694 µS/cm |
| 19 Feb 2024, 13:08 | 665 | 665 µS/cm |
| 15 Jan 2024, 12:14 | 874 | 874 µS/cm |
| 5 Dec 2023, 14:07 | 842 | 842 µS/cm |
| 16 Nov 2023, 08:59 | 765 | 765 µS/cm |
| 16 Oct 2023, 14:37 | 656 | 656 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 | 21 | Oct 2023 – Feb 2026 | 88.6% 24 Feb 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 21 | Oct 2023 – Feb 2026 | 9.93 mg/l 24 Feb 2026 |
| Temperature of Water 0076 | River water | 21 | Oct 2023 – Feb 2026 | 10.2 °C 24 Feb 2026 |
| pH 0061 | River water | 21 | Oct 2023 – Feb 2026 | 7.98 24 Feb 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 21 | Oct 2023 – Feb 2026 | 0.076 mg/l 24 Feb 2026 |
| Nitrate as N 0117 | River water | 21 | Oct 2023 – Feb 2026 | 9.96 mg/l 24 Feb 2026 |
| Orthophosphate, reactive as P 0180 | River water | 21 | Oct 2023 – Feb 2026 | 0.035 mg/l 24 Feb 2026 |
| Conductivity at 25 C 0077 | River water | 21 | Oct 2023 – Feb 2026 | 783 µS/cm 24 Feb 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 21 | Oct 2023 – Feb 2026 | 240 mg/l 24 Feb 2026 |
| Ammonia un-ionised as N 0119 | River water | 21 | Oct 2023 – Feb 2026 | 0.00134 mg/l 24 Feb 2026 |
| BOD : 5 Day ATU 0085 | River water | 16 | Feb 2024 – Feb 2026 | 2.1 mg/l 24 Feb 2026 |
| Nitrite as N 0118 | River water | 21 | Oct 2023 – Feb 2026 | 0.039 mg/l 24 Feb 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 21 | Oct 2023 – Feb 2026 | 10 mg/l 24 Feb 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.