River Leen
EA name: RIVER LEEN
Environment Agency sampling point MD-44505050 · 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
- 15 May 2026, 13:235 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
- 30 since 12 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 456400, 338300As published, to the nearest 100 m (so up to about 70 m out). Open in a map
- River, by its own name
- Leen
- River, by the map
- River LeenPlaced on the river its name gives, 41 m from the line.
- Next gauge downstream
- Colwick On the River Trent · 7.5 km along the river
- Nearest gauge upstream
- Lenton On the River Leen · 2.1 km along the river
- Why it was sampled
- Monitoring (national agency policy) (24 samples)
Planned investigation (local monitoring) (6 samples)
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
103.4%
Sampled 15 May 2026, 5 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 13:23 | 103.4 | 103.4% |
| 23 Apr 2026, 13:47 | 139.6 | 139.6% |
| 4 Mar 2026, 09:56 | 95.6 | 95.6% |
| 17 Feb 2026, 10:49 | 90.3 | 90.3% |
| 7 Jan 2026, 14:09 | 95.1 | 95.1% |
| 10 Dec 2025, 14:08 | 92.2 | 92.2% |
| 7 Nov 2025, 13:51 | 90.8 | 90.8% |
| 24 Oct 2025, 09:48 | 85.8 | 85.8% |
| 8 Sep 2025, 14:40 | 104.2 | 104.2% |
| 22 Aug 2025, 14:28 | 135 | 135% |
| 29 Jul 2025, 14:40 | 136.2 | 136.2% |
| 19 Jun 2025, 10:19 | 115.3 | 115.3% |
| 12 May 2025, 07:48 | 81.8 | 81.8% |
| 3 Apr 2025, 12:21 | 123.3 | 123.3% |
| 5 Mar 2025, 13:29 | 103.4 | 103.4% |
| 4 Feb 2025, 13:27 | 100.3 | 100.3% |
| 20 Jan 2025, 13:58 | 98.5 | 98.5% |
| 10 Dec 2024, 11:41 | 92.8 | 92.8% |
| 18 Nov 2024, 14:51 | 93.7 | 93.7% |
| 14 Oct 2024, 13:30 | 96.5 | 96.5% |
| 18 Sep 2024, 09:51 | 81.5 | 81.5% |
| 29 Aug 2024, 11:49 | 108.3 | 108.3% |
| 16 Jul 2024, 09:17 | 91.6 | 91.6% |
| 26 Jun 2024, 09:07 | 98.4 | 98.4% |
| 4 Mar 2024, 15:25 | 99.9 | 99.9% |
| 8 Feb 2024, 13:45 | 97.7 | 97.7% |
| 4 Jan 2024, 12:11 | 96 | 96% |
| 11 Dec 2023, 13:30 | 93.2 | 93.2% |
| 2 Nov 2023, 10:36 | 95.6 | 95.6% |
| 12 Oct 2023, 16:22 | 100.1 | 100.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
11 mg/l
Sampled 15 May 2026, 5 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 13:23 | 11 | 11 mg/l |
| 23 Apr 2026, 13:47 | 14.7 | 14.7 mg/l |
| 4 Mar 2026, 09:56 | 11.1 | 11.1 mg/l |
| 17 Feb 2026, 10:49 | 11.4 | 11.4 mg/l |
| 7 Jan 2026, 14:09 | 12 | 12 mg/l |
| 10 Dec 2025, 14:08 | 10.5 | 10.5 mg/l |
| 7 Nov 2025, 13:51 | 9.65 | 9.65 mg/l |
| 24 Oct 2025, 09:48 | 9.85 | 9.85 mg/l |
| 8 Sep 2025, 14:40 | 10.2 | 10.2 mg/l |
| 22 Aug 2025, 14:28 | 13.2 | 13.2 mg/l |
| 29 Jul 2025, 14:40 | 13 | 13 mg/l |
| 19 Jun 2025, 10:19 | 10.8 | 10.8 mg/l |
| 12 May 2025, 07:48 | 8.43 | 8.43 mg/l |
| 3 Apr 2025, 12:21 | 13.6 | 13.6 mg/l |
| 5 Mar 2025, 13:29 | 12.3 | 12.3 mg/l |
| 4 Feb 2025, 13:27 | 11.9 | 11.9 mg/l |
| 20 Jan 2025, 13:58 | 12.1 | 12.1 mg/l |
| 10 Dec 2024, 11:41 | 11 | 11 mg/l |
| 18 Nov 2024, 14:51 | 11.1 | 11.1 mg/l |
| 14 Oct 2024, 13:30 | 10.7 | 10.7 mg/l |
| 18 Sep 2024, 09:51 | 8.4 | 8.4 mg/l |
| 29 Aug 2024, 11:49 | 10.7 | 10.7 mg/l |
| 16 Jul 2024, 09:17 | 9.02 | 9.02 mg/l |
| 26 Jun 2024, 09:07 | 9.35 | 9.35 mg/l |
| 4 Mar 2024, 15:25 | 11.8 | 11.8 mg/l |
| 8 Feb 2024, 13:45 | 12.2 | 12.2 mg/l |
| 4 Jan 2024, 12:11 | 11.4 | 11.4 mg/l |
| 11 Dec 2023, 13:30 | 10.8 | 10.8 mg/l |
| 2 Nov 2023, 10:36 | 10.4 | 10.4 mg/l |
| 12 Oct 2023, 16:22 | 10.2 | 10.2 mg/l |
Water temperature
code 0076 · °C
12.5 °C
Sampled 15 May 2026, 5 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 13:23 | 12.5 | 12.5 °C |
| 23 Apr 2026, 13:47 | 12.8 | 12.8 °C |
| 4 Mar 2026, 09:56 | 8.6 | 8.6 °C |
| 17 Feb 2026, 10:49 | 5.4 | 5.4 °C |
| 7 Jan 2026, 14:09 | 5.3 | 5.3 °C |
| 10 Dec 2025, 14:08 | 9.7 | 9.7 °C |
| 7 Nov 2025, 13:51 | 12.5 | 12.5 °C |
| 24 Oct 2025, 09:48 | 9.2 | 9.2 °C |
| 8 Sep 2025, 14:40 | 16.3 | 16.3 °C |
| 22 Aug 2025, 14:28 | 16.4 | 16.4 °C |
| 29 Jul 2025, 14:40 | 17.3 | 17.3 °C |
| 19 Jun 2025, 10:19 | 18.6 | 18.6 °C |
| 12 May 2025, 07:48 | 13.9 | 13.9 °C |
| 3 Apr 2025, 12:21 | 11 | 11 °C |
| 5 Mar 2025, 13:29 | 7.9 | 7.9 °C |
| 4 Feb 2025, 13:27 | 7.7 | 7.7 °C |
| 20 Jan 2025, 13:58 | 6.5 | 6.5 °C |
| 10 Dec 2024, 11:41 | 7.8 | 7.8 °C |
| 18 Nov 2024, 14:51 | 8.1 | 8.1 °C |
| 14 Oct 2024, 13:30 | 10.7 | 10.7 °C |
| 18 Sep 2024, 09:51 | 13.9 | 13.9 °C |
| 29 Aug 2024, 11:49 | 15.7 | 15.7 °C |
| 16 Jul 2024, 09:17 | 16 | 16 °C |
| 26 Jun 2024, 09:07 | 17.7 | 17.7 °C |
| 4 Mar 2024, 15:25 | 8.2 | 8.2 °C |
| 8 Feb 2024, 13:45 | 5.8 | 5.8 °C |
| 4 Jan 2024, 12:11 | 8 | 8 °C |
| 11 Dec 2023, 13:30 | 8.8 | 8.8 °C |
| 2 Nov 2023, 10:36 | 11.3 | 11.3 °C |
| 12 Oct 2023, 16:22 | 14.6 | 14.6 °C |
pH
code 0061
8.18
Sampled 15 May 2026, 5 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 13:23 | 8.18 | 8.18 |
| 23 Apr 2026, 13:47 | 8.58 | 8.58 |
| 4 Mar 2026, 09:56 | 8.05 | 8.05 |
| 17 Feb 2026, 10:49 | 8.22 | 8.22 |
| 7 Jan 2026, 14:09 | 8.12 | 8.12 |
| 10 Dec 2025, 14:08 | 7.98 | 7.98 |
| 7 Nov 2025, 13:51 | 7.98 | 7.98 |
| 24 Oct 2025, 09:48 | 7.96 | 7.96 |
| 8 Sep 2025, 14:40 | 8.31 | 8.31 |
| 22 Aug 2025, 14:28 | 8.45 | 8.45 |
| 29 Jul 2025, 14:40 | 8.49 | 8.49 |
| 19 Jun 2025, 10:19 | 8.14 | 8.14 |
| 12 May 2025, 07:48 | 8 | 8 |
| 3 Apr 2025, 12:21 | 8.41 | 8.41 |
| 5 Mar 2025, 13:29 | 8.21 | 8.21 |
| 4 Feb 2025, 13:27 | 8.16 | 8.16 |
| 20 Jan 2025, 13:58 | 8.15 | 8.15 |
| 10 Dec 2024, 11:41 | 8.14 | 8.14 |
| 18 Nov 2024, 14:51 | 8.13 | 8.13 |
| 14 Oct 2024, 13:30 | 8.05 | 8.05 |
| 18 Sep 2024, 09:51 | 7.92 | 7.92 |
| 29 Aug 2024, 11:49 | 8.22 | 8.22 |
| 16 Jul 2024, 09:17 | 7.81 | 7.81 |
| 26 Jun 2024, 09:07 | 7.98 | 7.98 |
| 4 Mar 2024, 15:25 | 8.09 | 8.09 |
| 8 Feb 2024, 13:45 | 8.13 | 8.13 |
| 4 Jan 2024, 12:11 | 7.97 | 7.97 |
| 11 Dec 2023, 13:30 | 7.97 | 7.97 |
| 2 Nov 2023, 10:36 | 7.87 | 7.87 |
| 12 Oct 2023, 16:22 | 8.4 | 8.4 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.15 mg/l
Sampled 15 May 2026, 5 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 13:23 | 0.15 | 0.15 mg/l |
| 23 Apr 2026, 13:47 | <0.03 | below 0.03 mg/l (not detected above this) |
| 4 Mar 2026, 09:56 | 0.15 | 0.15 mg/l |
| 17 Feb 2026, 10:49 | 0.14 | 0.14 mg/l |
| 7 Jan 2026, 14:09 | 0.4 | 0.4 mg/l |
| 10 Dec 2025, 14:08 | 0.15 | 0.15 mg/l |
| 7 Nov 2025, 13:51 | 0.12 | 0.12 mg/l |
| 24 Oct 2025, 09:48 | 0.15 | 0.15 mg/l |
| 8 Sep 2025, 14:40 | 0.083 | 0.083 mg/l |
| 22 Aug 2025, 14:28 | <0.03 | below 0.03 mg/l (not detected above this) |
| 29 Jul 2025, 14:40 | <0.03 | below 0.03 mg/l (not detected above this) |
| 19 Jun 2025, 10:19 | <0.03 | below 0.03 mg/l (not detected above this) |
| 12 May 2025, 07:48 | 0.22 | 0.22 mg/l |
| 3 Apr 2025, 12:21 | 0.048 | 0.048 mg/l |
| 5 Mar 2025, 13:29 | 0.19 | 0.19 mg/l |
| 4 Feb 2025, 13:27 | 0.22 | 0.22 mg/l |
| 20 Jan 2025, 13:58 | 0.37 | 0.37 mg/l |
| 10 Dec 2024, 11:41 | 0.14 | 0.14 mg/l |
| 18 Nov 2024, 14:51 | 0.096 | 0.096 mg/l |
| 14 Oct 2024, 13:30 | 0.18 | 0.18 mg/l |
| 18 Sep 2024, 09:51 | 0.086 | 0.086 mg/l |
| 29 Aug 2024, 11:49 | 0.056 | 0.056 mg/l |
| 16 Jul 2024, 09:17 | 0.098 | 0.098 mg/l |
| 26 Jun 2024, 09:07 | 0.1 | 0.1 mg/l |
| 4 Mar 2024, 15:25 | 0.23 | 0.23 mg/l |
| 8 Feb 2024, 13:45 | 0.34 | 0.34 mg/l |
| 4 Jan 2024, 12:11 | 0.14 | 0.14 mg/l |
| 11 Dec 2023, 13:30 | 0.2 | 0.2 mg/l |
| 2 Nov 2023, 10:36 | 0.12 | 0.12 mg/l |
| 12 Oct 2023, 16:22 | 0.095 | 0.095 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
5.7 mg/l
Sampled 15 May 2026, 5 months ago · 29 results banked
Every result (29)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 13:23 | 5.7 | 5.7 mg/l |
| 23 Apr 2026, 13:47 | 6.43 | 6.43 mg/l |
| 4 Mar 2026, 09:56 | 6.77 | 6.77 mg/l |
| 17 Feb 2026, 10:49 | 6.28 | 6.28 mg/l |
| 7 Jan 2026, 14:09 | 7.34 | 7.34 mg/l |
| 10 Dec 2025, 14:08 | 5.66 | 5.66 mg/l |
| 7 Nov 2025, 13:51 | 4.93 | 4.93 mg/l |
| 24 Oct 2025, 09:48 | 5.02 | 5.02 mg/l |
| 8 Sep 2025, 14:40 | 5.31 | 5.31 mg/l |
| 22 Aug 2025, 14:28 | 5.66 | 5.66 mg/l |
| 29 Jul 2025, 14:40 | 5.05 | 5.05 mg/l |
| 19 Jun 2025, 10:19 | 4.86 | 4.86 mg/l |
| 12 May 2025, 07:48 | 6.04 | 6.04 mg/l |
| 3 Apr 2025, 12:21 | 7.05 | 7.05 mg/l |
| 5 Mar 2025, 13:29 | 6.96 | 6.96 mg/l |
| 4 Feb 2025, 13:27 | 7.06 | 7.06 mg/l |
| 20 Jan 2025, 13:58 | 7.45 | 7.45 mg/l |
| 10 Dec 2024, 11:41 | 5.86 | 5.86 mg/l |
| 18 Nov 2024, 14:51 | 6.92 | 6.92 mg/l |
| 14 Oct 2024, 13:30 | 5.42 | 5.42 mg/l |
| 18 Sep 2024, 09:51 | 6.17 | 6.17 mg/l |
| 29 Aug 2024, 11:49 | 6.38 | 6.38 mg/l |
| 16 Jul 2024, 09:17 | 1.86 | 1.86 mg/l |
| 26 Jun 2024, 09:07 | 5.9 | 5.9 mg/l |
| 4 Mar 2024, 15:25 | 6.96 | 6.96 mg/l |
| 4 Jan 2024, 12:11 | 6.07 | 6.07 mg/l |
| 11 Dec 2023, 13:30 | 5.96 | 5.96 mg/l |
| 2 Nov 2023, 10:36 | 3.46 | 3.46 mg/l |
| 12 Oct 2023, 16:22 | 4.33 | 4.33 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.056 mg/l
Sampled 15 May 2026, 5 months ago · 30 results banked
Every result (30)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 13:23 | 0.056 | 0.056 mg/l |
| 23 Apr 2026, 13:47 | 0.031 | 0.031 mg/l |
| 4 Mar 2026, 09:56 | 0.042 | 0.042 mg/l |
| 17 Feb 2026, 10:49 | 0.041 | 0.041 mg/l |
| 7 Jan 2026, 14:09 | 0.067 | 0.067 mg/l |
| 10 Dec 2025, 14:08 | 0.074 | 0.074 mg/l |
| 7 Nov 2025, 13:51 | 0.061 | 0.061 mg/l |
| 24 Oct 2025, 09:48 | 0.053 | 0.053 mg/l |
| 8 Sep 2025, 14:40 | 0.084 | 0.084 mg/l |
| 22 Aug 2025, 14:28 | 0.11 | 0.11 mg/l |
| 29 Jul 2025, 14:40 | 0.09 | 0.09 mg/l |
| 19 Jun 2025, 10:19 | 0.07 | 0.07 mg/l |
| 12 May 2025, 07:48 | 0.097 | 0.097 mg/l |
| 3 Apr 2025, 12:21 | 0.014 | 0.014 mg/l |
| 5 Mar 2025, 13:29 | 0.058 | 0.058 mg/l |
| 4 Feb 2025, 13:27 | 0.046 | 0.046 mg/l |
| 20 Jan 2025, 13:58 | 0.052 | 0.052 mg/l |
| 10 Dec 2024, 11:41 | 0.066 | 0.066 mg/l |
| 18 Nov 2024, 14:51 | 0.051 | 0.051 mg/l |
| 14 Oct 2024, 13:30 | 0.051 | 0.051 mg/l |
| 18 Sep 2024, 09:51 | 0.074 | 0.074 mg/l |
| 29 Aug 2024, 11:49 | 0.08 | 0.08 mg/l |
| 16 Jul 2024, 09:17 | 0.07 | 0.07 mg/l |
| 26 Jun 2024, 09:07 | 0.025 | 0.025 mg/l |
| 4 Mar 2024, 15:25 | 0.044 | 0.044 mg/l |
| 8 Feb 2024, 13:45 | 0.1 | 0.1 mg/l |
| 4 Jan 2024, 12:11 | 0.05 | 0.05 mg/l |
| 11 Dec 2023, 13:30 | 0.072 | 0.072 mg/l |
| 2 Nov 2023, 10:36 | 0.061 | 0.061 mg/l |
| 12 Oct 2023, 16:22 | 0.058 | 0.058 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
874 µS/cm
Sampled 15 May 2026, 5 months ago · 24 results banked
Every result (24)
| Sampled | Result as published | Reads as |
|---|---|---|
| 15 May 2026, 13:23 | 874 | 874 µS/cm |
| 23 Apr 2026, 13:47 | 896 | 896 µS/cm |
| 4 Mar 2026, 09:56 | 814 | 814 µS/cm |
| 17 Feb 2026, 10:49 | 749 | 749 µS/cm |
| 7 Jan 2026, 14:09 | 1285 | 1285 µS/cm |
| 10 Dec 2025, 14:08 | 719 | 719 µS/cm |
| 7 Nov 2025, 13:51 | 781 | 781 µS/cm |
| 24 Oct 2025, 09:48 | 797 | 797 µS/cm |
| 8 Sep 2025, 14:40 | 454 | 454 µS/cm |
| 22 Aug 2025, 14:28 | 905 | 905 µS/cm |
| 29 Jul 2025, 14:40 | 423 | 423 µS/cm |
| 19 Jun 2025, 10:19 | 930 | 930 µS/cm |
| 12 May 2025, 07:48 | 963 | 963 µS/cm |
| 3 Apr 2025, 12:21 | 926 | 926 µS/cm |
| 5 Mar 2025, 13:29 | 894 | 894 µS/cm |
| 4 Feb 2025, 13:27 | 891 | 891 µS/cm |
| 20 Jan 2025, 13:58 | 909 | 909 µS/cm |
| 10 Dec 2024, 11:41 | 749 | 749 µS/cm |
| 18 Nov 2024, 14:51 | 884 | 884 µS/cm |
| 14 Oct 2024, 13:30 | 768 | 768 µS/cm |
| 18 Sep 2024, 09:51 | 921 | 921 µS/cm |
| 29 Aug 2024, 11:49 | 915 | 915 µS/cm |
| 16 Jul 2024, 09:17 | 324 | 324 µS/cm |
| 26 Jun 2024, 09:07 | 919 | 919 µS/cm |
Everything measured here
14 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 14 rows
| Determinand | Material | Results | First – last | Latest result |
|---|---|---|---|---|
| Oxygen, Dissolved, % Saturation 9901 | River water | 30 | Oct 2023 – May 2026 | 103.4% 15 May 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 30 | Oct 2023 – May 2026 | 11 mg/l 15 May 2026 |
| Temperature of Water 0076 | River water | 30 | Oct 2023 – May 2026 | 12.5 °C 15 May 2026 |
| pH 0061 | River water | 30 | Oct 2023 – May 2026 | 8.18 15 May 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 30 | Oct 2023 – May 2026 | 0.15 mg/l 15 May 2026 |
| Nitrate as N 0117 | River water | 29 | Oct 2023 – May 2026 | 5.7 mg/l 15 May 2026 |
| Orthophosphate, reactive as P 0180 | River water | 30 | Oct 2023 – May 2026 | 0.056 mg/l 15 May 2026 |
| Conductivity at 25 C 0077 | River water | 24 | Jun 2024 – May 2026 | 874 µS/cm 15 May 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 30 | Oct 2023 – May 2026 | 260 mg/l 15 May 2026 |
| Ammonia un-ionised as N 0119 | River water | 30 | Oct 2023 – May 2026 | 0.00328 mg/l 15 May 2026 |
| BOD : 5 Day ATU 0085 | River water | 29 | Oct 2023 – May 2026 | 2 mg/l 15 May 2026 |
| Nitrite as N 0118 | River water | 29 | Oct 2023 – May 2026 | 0.1 mg/l 15 May 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 29 | Oct 2023 – May 2026 | 5.8 mg/l 15 May 2026 |
| Solids, Suspended at 105 C 0135 | River water | 6 | Oct 2023 – Mar 2024 | 7.1 mg/l 4 Mar 2024 |
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.