Tributary of Leen, Chilwell Dam Plantation

EA name: TRIB OF LEEN, CHILWELL DAM PLANTATION
Environment Agency sampling point MD-44508181 · 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
2 Sep 2026, 08:4236 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
Samples banked
4 since 9 Jun 2026 Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
Latest sample
River / running surface water Planned investigation (local monitoring)
Where
National Grid 453137, 343497As published, to the nearest 1 m. Open in a map
River, by its own name
Leen
River, by the map
An unnamed streamOn a small stream traced into the river its name gives, 7 m from the line.
Next gauge downstream
Lenton On the River Leen · 6.8 km along the river
Why it was sampled
Planned investigation (local monitoring) (4 samples)

Main measurements, river water

Dissolved oxygen

% saturation · code 9901 · %

78.3%

Sampled 2 Sep 2026, 36 days ago · 4 results banked

7580859095%2024202520269 Jun 2026, 13:39: 91%8 Jul 2026, 11:48: 89.5%11 Aug 2026, 07:08: 93.1%2 Sep 2026, 08:42: 78.3%
Every result (4)
SampledResult as publishedReads as
2 Sep 2026, 08:4278.3 78.3%
11 Aug 2026, 07:0893.1 93.1%
8 Jul 2026, 11:4889.5 89.5%
9 Jun 2026, 13:3991 91%

Dissolved oxygen

as O2 · code 9924 · mg/l

8.06 mg/l

Sampled 2 Sep 2026, 36 days ago · 4 results banked

88.599.510mg/l2024202520269 Jun 2026, 13:39: 9.67 mg/l8 Jul 2026, 11:48: 8.73 mg/l11 Aug 2026, 07:08: 9.74 mg/l2 Sep 2026, 08:42: 8.06 mg/l
Every result (4)
SampledResult as publishedReads as
2 Sep 2026, 08:428.06 8.06 mg/l
11 Aug 2026, 07:089.74 9.74 mg/l
8 Jul 2026, 11:488.73 8.73 mg/l
9 Jun 2026, 13:399.67 9.67 mg/l

Water temperature

code 0076 · °C

13.9 °C

Sampled 2 Sep 2026, 36 days ago · 4 results banked

121314151617°C2024202520269 Jun 2026, 13:39: 12.5 °C8 Jul 2026, 11:48: 16.4 °C11 Aug 2026, 07:08: 13.2 °C2 Sep 2026, 08:42: 13.9 °C
Every result (4)
SampledResult as publishedReads as
2 Sep 2026, 08:4213.9 13.9 °C
11 Aug 2026, 07:0813.2 13.2 °C
8 Jul 2026, 11:4816.4 16.4 °C
9 Jun 2026, 13:3912.5 12.5 °C

pH

code 0061

8.16

Sampled 2 Sep 2026, 36 days ago · 4 results banked

88.18.28.38.42024202520269 Jun 2026, 13:39: 8.018 Jul 2026, 11:48: 8.2411 Aug 2026, 07:08: 8.332 Sep 2026, 08:42: 8.16
Every result (4)
SampledResult as publishedReads as
2 Sep 2026, 08:428.16 8.16
11 Aug 2026, 07:088.33 8.33
8 Jul 2026, 11:488.24 8.24
9 Jun 2026, 13:398.01 8.01

Ammonia

ammoniacal nitrogen as N · code 0111 · mg/l

0.45 mg/l

Sampled 2 Sep 2026, 36 days ago · 4 results banked

00.20.40.6mg/l2024202520269 Jun 2026, 13:39: 0.17 mg/l8 Jul 2026, 11:48: 0.16 mg/l11 Aug 2026, 07:08: 0.041 mg/l2 Sep 2026, 08:42: 0.45 mg/l
Every result (4)
SampledResult as publishedReads as
2 Sep 2026, 08:420.45 0.45 mg/l
11 Aug 2026, 07:080.041 0.041 mg/l
8 Jul 2026, 11:480.16 0.16 mg/l
9 Jun 2026, 13:390.17 0.17 mg/l

Nitrate

as nitrogen (N) · code 0117 · mg/l

4.63 mg/l

Sampled 2 Sep 2026, 36 days ago · 4 results banked

4.44.64.855.25.4mg/l2024202520269 Jun 2026, 13:39: 5.21 mg/l8 Jul 2026, 11:48: 4.65 mg/l11 Aug 2026, 07:08: 4.48 mg/l2 Sep 2026, 08:42: 4.63 mg/l
Every result (4)
SampledResult as publishedReads as
2 Sep 2026, 08:424.63 4.63 mg/l
11 Aug 2026, 07:084.48 4.48 mg/l
8 Jul 2026, 11:484.65 4.65 mg/l
9 Jun 2026, 13:395.21 5.21 mg/l

Phosphate

orthophosphate, reactive, as P · code 0180 · mg/l

0.11 mg/l

Sampled 2 Sep 2026, 36 days ago · 4 results banked

0.040.060.080.10.12mg/l2024202520269 Jun 2026, 13:39: 0.078 mg/l8 Jul 2026, 11:48: 0.073 mg/l11 Aug 2026, 07:08: 0.041 mg/l2 Sep 2026, 08:42: 0.11 mg/l
Every result (4)
SampledResult as publishedReads as
2 Sep 2026, 08:420.11 0.11 mg/l
11 Aug 2026, 07:080.041 0.041 mg/l
8 Jul 2026, 11:480.073 0.073 mg/l
9 Jun 2026, 13:390.078 0.078 mg/l

Conductivity

at 25 °C · code 0077 · µS/cm

917 µS/cm

Sampled 2 Sep 2026, 36 days ago · 4 results banked

9009209409609801000µS/cm2024202520269 Jun 2026, 13:39: 982 µS/cm8 Jul 2026, 11:48: 983 µS/cm11 Aug 2026, 07:08: 962 µS/cm2 Sep 2026, 08:42: 917 µS/cm
Every result (4)
SampledResult as publishedReads as
2 Sep 2026, 08:42917 917 µS/cm
11 Aug 2026, 07:08962 962 µS/cm
8 Jul 2026, 11:48983 983 µS/cm
9 Jun 2026, 13:39982 982 µS/cm

Everything measured here

28 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 28 rows
DeterminandMaterialResults First – lastLatest result
Oxygen, Dissolved, % Saturation 9901 River water 4 Jun 2026 – Sep 2026 78.3% 2 Sep 2026
Oxygen, Dissolved as O2 9924 River water 4 Jun 2026 – Sep 2026 8.06 mg/l 2 Sep 2026
Temperature of Water 0076 River water 4 Jun 2026 – Sep 2026 13.9 °C 2 Sep 2026
pH 0061 River water 4 Jun 2026 – Sep 2026 8.16 2 Sep 2026
Ammoniacal Nitrogen as N 0111 River water 4 Jun 2026 – Sep 2026 0.45 mg/l 2 Sep 2026
Nitrate as N 0117 River water 4 Jun 2026 – Sep 2026 4.63 mg/l 2 Sep 2026
Orthophosphate, reactive as P 0180 River water 4 Jun 2026 – Sep 2026 0.11 mg/l 2 Sep 2026
Conductivity at 25 C 0077 River water 4 Jun 2026 – Sep 2026 917 µS/cm 2 Sep 2026
Alkalinity to pH 4.5 as CaCO3 0162 River water 4 Jun 2026 – Sep 2026 350 mg/l 2 Sep 2026
Aluminium 6057 River water 4 Jun 2026 – Sep 2026 23 µg/l 2 Sep 2026
Ammonia un-ionised as N 0119 River water 4 Jun 2026 – Sep 2026 0.0109 mg/l 2 Sep 2026
Cadmium 0108 River water 4 Jun 2026 – Sep 2026 below 0.1 µg/l 2 Sep 2026
Calcium 0241 River water 4 Jun 2026 – Sep 2026 89 mg/l 2 Sep 2026
Carbon, Organic, Dissolved as C :- {DOC} 0301 River water 4 Jun 2026 – Sep 2026 1.7 mg/l 2 Sep 2026
Chloride 0172 River water 4 Jun 2026 – Sep 2026 51 mg/l 2 Sep 2026
Chromium 3164 River water 4 Jun 2026 – Sep 2026 below 0.5 µg/l 2 Sep 2026
Copper 6452 River water 4 Jun 2026 – Sep 2026 1.2 µg/l 2 Sep 2026
Lead 0050 River water 4 Jun 2026 – Sep 2026 below 2 µg/l 2 Sep 2026
Magnesium 0237 River water 4 Jun 2026 – Sep 2026 43 mg/l 2 Sep 2026
Nickel 6462 River water 4 Jun 2026 – Sep 2026 below 1 µg/l 2 Sep 2026
Nitrite as N 0118 River water 4 Jun 2026 – Sep 2026 0.075 mg/l 2 Sep 2026
Nitrogen, Kjeldahl as N 0114 River water 4 Jun 2026 – Sep 2026 1.1 mg/l 2 Sep 2026
Nitrogen, Total as N 9686 River water 4 Jun 2026 – Sep 2026 5.8 mg/l 2 Sep 2026
Nitrogen, Total Oxidised as N 0116 River water 4 Jun 2026 – Sep 2026 4.7 mg/l 2 Sep 2026
Potassium 0211 River water 4 Jun 2026 – Sep 2026 4.9 mg/l 2 Sep 2026
Sodium 0207 River water 4 Jun 2026 – Sep 2026 36 mg/l 2 Sep 2026
Sulphate as SO4 0183 River water 4 Jun 2026 – Sep 2026 66 mg/l 2 Sep 2026
Zinc 6455 River water 4 Jun 2026 – Sep 2026 6.1 µg/l 2 Sep 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.