River Leen at Bobbers Mill
EA name: RIVER LEEN AT BOBBERS MILL
Environment Agency sampling point MD-44506300 · 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
- 4 Sep 2026, 11:5634 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
- Samples banked
- 12 since 11 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) · results completed 9 Sep 2026
- Where
- National Grid 455015, 341244As published, to the nearest 1 m. Open in a map
- River, by its own name
- Leen
- River, by the map
- River LeenPlaced on the river its name gives, 4 m from the line.
- Next gauge downstream
- Lenton On the River Leen · 2.1 km along the river
- Nearest gauge upstream
- Day Brook On the Day Brook · 3.4 km along the riverBulwell On the River Leen · 6.2 km along the river
- Why it was sampled
- Planned investigation (local monitoring) (6 samples)
Monitoring (national agency policy) (6 samples)
Results here were completed a median of 5 days after the sample was taken (4 to 7 days, 3 samples).
Main measurements, river water
Dissolved oxygen
% saturation · code 9901 · %
90.4%
Sampled 4 Sep 2026, 34 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:56 | 90.4 | 90.4% |
| 11 Aug 2026, 10:35 | 104.1 | 104.1% |
| 1 Jul 2026, 10:28 | 81.4 | 81.4% |
| 9 Jun 2026, 14:01 | 121.3 | 121.3% |
| 20 May 2026, 12:40 | 105.3 | 105.3% |
| 21 Apr 2026, 10:06 | 108.9 | 108.9% |
| 5 Mar 2024, 11:13 | 98.4 | 98.4% |
| 8 Feb 2024, 13:14 | 97.3 | 97.3% |
| 8 Jan 2024, 08:19 | 97.1 | 97.1% |
| 14 Dec 2023, 15:17 | 95.6 | 95.6% |
| 3 Nov 2023, 11:25 | 92.9 | 92.9% |
| 11 Oct 2023, 09:25 | 84.1 | 84.1% |
Dissolved oxygen
as O2 · code 9924 · mg/l
8.68 mg/l
Sampled 4 Sep 2026, 34 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:56 | 8.68 | 8.68 mg/l |
| 11 Aug 2026, 10:35 | 9.89 | 9.89 mg/l |
| 1 Jul 2026, 10:28 | 7.69 | 7.69 mg/l |
| 9 Jun 2026, 14:01 | 12.1 | 12.1 mg/l |
| 20 May 2026, 12:40 | 10.9 | 10.9 mg/l |
| 21 Apr 2026, 10:06 | 12 | 12 mg/l |
| 5 Mar 2024, 11:13 | 11.7 | 11.7 mg/l |
| 8 Feb 2024, 13:14 | 12.2 | 12.2 mg/l |
| 8 Jan 2024, 08:19 | 11.9 | 11.9 mg/l |
| 14 Dec 2023, 15:17 | 11.4 | 11.4 mg/l |
| 3 Nov 2023, 11:25 | 10.5 | 10.5 mg/l |
| 11 Oct 2023, 09:25 | 8.4 | 8.4 mg/l |
Water temperature
code 0076 · °C
17.2 °C
Sampled 4 Sep 2026, 34 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:56 | 17.2 | 17.2 °C |
| 11 Aug 2026, 10:35 | 17.7 | 17.7 °C |
| 1 Jul 2026, 10:28 | 18 | 18 °C |
| 9 Jun 2026, 14:01 | 15.2 | 15.2 °C |
| 20 May 2026, 12:40 | 13.8 | 13.8 °C |
| 21 Apr 2026, 10:06 | 10.9 | 10.9 °C |
| 5 Mar 2024, 11:13 | 7.9 | 7.9 °C |
| 8 Feb 2024, 13:14 | 5.7 | 5.7 °C |
| 8 Jan 2024, 08:19 | 6.4 | 6.4 °C |
| 14 Dec 2023, 15:17 | 7.8 | 7.8 °C |
| 3 Nov 2023, 11:25 | 10 | 10 °C |
| 11 Oct 2023, 09:25 | 15.3 | 15.3 °C |
pH
code 0061
8.04
Sampled 4 Sep 2026, 34 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:56 | 8.04 | 8.04 |
| 11 Aug 2026, 10:35 | 8.2 | 8.2 |
| 1 Jul 2026, 10:28 | 7.77 | 7.77 |
| 9 Jun 2026, 14:01 | 8.4 | 8.4 |
| 20 May 2026, 12:40 | 8.11 | 8.11 |
| 21 Apr 2026, 10:06 | 8.3 | 8.3 |
| 5 Mar 2024, 11:13 | 8.2 | 8.2 |
| 8 Feb 2024, 13:14 | 8.17 | 8.17 |
| 8 Jan 2024, 08:19 | 8.1 | 8.1 |
| 14 Dec 2023, 15:17 | 7.96 | 7.96 |
| 3 Nov 2023, 11:25 | 7.92 | 7.92 |
| 11 Oct 2023, 09:25 | 8.21 | 8.21 |
Ammonia
ammoniacal nitrogen as N · code 0111 · mg/l
0.17 mg/l
Sampled 4 Sep 2026, 34 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:56 | 0.17 | 0.17 mg/l |
| 11 Aug 2026, 10:35 | 0.12 | 0.12 mg/l |
| 1 Jul 2026, 10:28 | 0.14 | 0.14 mg/l |
| 9 Jun 2026, 14:01 | 0.19 | 0.19 mg/l |
| 20 May 2026, 12:40 | 0.28 | 0.28 mg/l |
| 21 Apr 2026, 10:06 | 0.19 | 0.19 mg/l |
| 5 Mar 2024, 11:13 | 0.27 | 0.27 mg/l |
| 8 Feb 2024, 13:14 | 0.26 | 0.26 mg/l |
| 8 Jan 2024, 08:19 | 0.23 | 0.23 mg/l |
| 14 Dec 2023, 15:17 | 0.32 | 0.32 mg/l |
| 3 Nov 2023, 11:25 | 0.17 | 0.17 mg/l |
| 11 Oct 2023, 09:25 | 0.32 | 0.32 mg/l |
Nitrate
as nitrogen (N) · code 0117 · mg/l
2.74 mg/l
Sampled 4 Sep 2026, 34 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:56 | 2.74 | 2.74 mg/l |
| 11 Aug 2026, 10:35 | 4.9 | 4.9 mg/l |
| 1 Jul 2026, 10:28 | 4.13 | 4.13 mg/l |
| 9 Jun 2026, 14:01 | 5.1 | 5.1 mg/l |
| 20 May 2026, 12:40 | 5.3 | 5.3 mg/l |
| 21 Apr 2026, 10:06 | 6.73 | 6.73 mg/l |
| 5 Mar 2024, 11:13 | 7.06 | 7.06 mg/l |
| 8 Feb 2024, 13:14 | 3.66 | 3.66 mg/l |
| 8 Jan 2024, 08:19 | 7.77 | 7.77 mg/l |
| 14 Dec 2023, 15:17 | 7.35 | 7.35 mg/l |
| 3 Nov 2023, 11:25 | 5.47 | 5.47 mg/l |
| 11 Oct 2023, 09:25 | 6.79 | 6.79 mg/l |
Phosphate
orthophosphate, reactive, as P · code 0180 · mg/l
0.1 mg/l
Sampled 4 Sep 2026, 34 days ago · 12 results banked
Every result (12)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:56 | 0.1 | 0.1 mg/l |
| 11 Aug 2026, 10:35 | 0.07 | 0.07 mg/l |
| 1 Jul 2026, 10:28 | 0.073 | 0.073 mg/l |
| 9 Jun 2026, 14:01 | 0.065 | 0.065 mg/l |
| 20 May 2026, 12:40 | 0.054 | 0.054 mg/l |
| 21 Apr 2026, 10:06 | 0.018 | 0.018 mg/l |
| 5 Mar 2024, 11:13 | 0.056 | 0.056 mg/l |
| 8 Feb 2024, 13:14 | 0.065 | 0.065 mg/l |
| 8 Jan 2024, 08:19 | 0.04 | 0.04 mg/l |
| 14 Dec 2023, 15:17 | 0.071 | 0.071 mg/l |
| 3 Nov 2023, 11:25 | 0.054 | 0.054 mg/l |
| 11 Oct 2023, 09:25 | 0.079 | 0.079 mg/l |
Conductivity
at 25 °C · code 0077 · µS/cm
482 µS/cm
Sampled 4 Sep 2026, 34 days ago · 6 results banked
Every result (6)
| Sampled | Result as published | Reads as |
|---|---|---|
| 4 Sep 2026, 11:56 | 482 | 482 µS/cm |
| 11 Aug 2026, 10:35 | 849 | 849 µS/cm |
| 1 Jul 2026, 10:28 | 762 | 762 µS/cm |
| 9 Jun 2026, 14:01 | 812 | 812 µS/cm |
| 20 May 2026, 12:40 | 768 | 768 µS/cm |
| 21 Apr 2026, 10:06 | 860 | 860 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 | 12 | Oct 2023 – Sep 2026 | 90.4% 4 Sep 2026 |
| Oxygen, Dissolved as O2 9924 | River water | 12 | Oct 2023 – Sep 2026 | 8.68 mg/l 4 Sep 2026 |
| Temperature of Water 0076 | River water | 12 | Oct 2023 – Sep 2026 | 17.2 °C 4 Sep 2026 |
| pH 0061 | River water | 12 | Oct 2023 – Sep 2026 | 8.04 4 Sep 2026 |
| Ammoniacal Nitrogen as N 0111 | River water | 12 | Oct 2023 – Sep 2026 | 0.17 mg/l 4 Sep 2026 |
| Nitrate as N 0117 | River water | 12 | Oct 2023 – Sep 2026 | 2.74 mg/l 4 Sep 2026 |
| Orthophosphate, reactive as P 0180 | River water | 12 | Oct 2023 – Sep 2026 | 0.1 mg/l 4 Sep 2026 |
| Conductivity at 25 C 0077 | River water | 6 | Apr 2026 – Sep 2026 | 482 µS/cm 4 Sep 2026 |
| Alkalinity to pH 4.5 as CaCO3 0162 | River water | 12 | Oct 2023 – Sep 2026 | 140 mg/l 4 Sep 2026 |
| Ammonia un-ionised as N 0119 | River water | 12 | Oct 2023 – Sep 2026 | 0.00524 mg/l 4 Sep 2026 |
| BOD : 5 Day ATU 0085 | River water | 6 | Oct 2023 – Mar 2024 | below 2 mg/l 5 Mar 2024 |
| Nitrite as N 0118 | River water | 12 | Oct 2023 – Sep 2026 | 0.06 mg/l 4 Sep 2026 |
| Nitrogen, Total Oxidised as N 0116 | River water | 12 | Oct 2023 – Sep 2026 | 2.8 mg/l 4 Sep 2026 |
| Solids, Suspended at 105 C 0135 | River water | 6 | Oct 2023 – Mar 2024 | 9.3 mg/l 5 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.