Allerthorpe Drain near Barmby Moor

EA name: ALLERTHORPE DRAIN NEAR BARMBY MOOR
Environment Agency sampling point NE-SSN1345 · 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
11 Sep 2026, 13:2620 days ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
Samples banked
37 since 12 Jan 2024 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 478052, 448407As published, to the nearest 1 m. Open in a map
River, by its own name
Allerthorpe Drain
River, by the map
Not placedNo mapped watercourse within 500 m. The river map cannot say which watercourse this is.
Next gauge downstream
Not known
Why it was sampled
Monitoring (national agency policy) (37 samples)

34 visits found no water to sample (recorded as “No flow”).

Main measurements, river water

Dissolved oxygen

% saturation · code 9901 · %

62.6%

Sampled 25 Feb 2026, 7 months ago · 1 result banked

55606570%20242025202625 Feb 2026, 13:42: 62.6%
Every result (1)
SampledResult as publishedReads as
25 Feb 2026, 13:4262.6 62.6%

Dissolved oxygen

as O2 · code 9924 · mg/l

6.73 mg/l

Sampled 25 Feb 2026, 7 months ago · 1 result banked

5678mg/l20242025202625 Feb 2026, 13:42: 6.73 mg/l
Every result (1)
SampledResult as publishedReads as
25 Feb 2026, 13:426.73 6.73 mg/l

Water temperature

code 0076 · °C

11.9 °C

Sampled 25 Feb 2026, 7 months ago · 1 result banked

1011121314°C20242025202625 Feb 2026, 13:42: 11.9 °C
Every result (1)
SampledResult as publishedReads as
25 Feb 2026, 13:4211.9 11.9 °C

pH

code 0061

7.63

Sampled 25 Feb 2026, 7 months ago · 1 result banked

678920242025202625 Feb 2026, 13:42: 7.63
Every result (1)
SampledResult as publishedReads as
25 Feb 2026, 13:427.63 7.63

Ammonia

ammoniacal nitrogen as N · code 0111 · mg/l

below 0.03 mg/l (not detected above this)

Sampled 25 Feb 2026, 7 months ago · 1 result banked

-0.500.51mg/l20242025202625 Feb 2026, 13:42: below 0.03 mg/l (not detected above this)
Every result (1)
SampledResult as publishedReads as
25 Feb 2026, 13:42<0.03 below 0.03 mg/l (not detected above this)

Nitrate

as nitrogen (N) · code 0117 · mg/l

7.58 mg/l

Sampled 25 Feb 2026, 7 months ago · 1 result banked

6789mg/l20242025202625 Feb 2026, 13:42: 7.58 mg/l
Every result (1)
SampledResult as publishedReads as
25 Feb 2026, 13:427.58 7.58 mg/l

Phosphate

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

0.085 mg/l

Sampled 25 Feb 2026, 7 months ago · 1 result banked

-0.500.51mg/l20242025202625 Feb 2026, 13:42: 0.085 mg/l
Every result (1)
SampledResult as publishedReads as
25 Feb 2026, 13:420.085 0.085 mg/l

Conductivity

at 25 °C · code 0077 · µS/cm

1733 µS/cm

Sampled 25 Feb 2026, 7 months ago · 1 result banked

150016001700180019002000µS/cm20242025202625 Feb 2026, 13:42: 1733 µS/cm
Every result (1)
SampledResult as publishedReads as
25 Feb 2026, 13:421733 1733 µS/cm

Everything measured here

24 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 24 rows
DeterminandMaterialResults First – lastLatest result
Oxygen, Dissolved, % Saturation 9901 River water 1 Feb 2026 – Feb 2026 62.6% 25 Feb 2026
Oxygen, Dissolved as O2 9924 River water 1 Feb 2026 – Feb 2026 6.73 mg/l 25 Feb 2026
Temperature of Water 0076 River water 1 Feb 2026 – Feb 2026 11.9 °C 25 Feb 2026
pH 0061 River water 1 Feb 2026 – Feb 2026 7.63 25 Feb 2026
Ammoniacal Nitrogen as N 0111 River water 1 Feb 2026 – Feb 2026 below 0.03 mg/l 25 Feb 2026
Nitrate as N 0117 River water 1 Feb 2026 – Feb 2026 7.58 mg/l 25 Feb 2026
Orthophosphate, reactive as P 0180 River water 1 Feb 2026 – Feb 2026 0.085 mg/l 25 Feb 2026
Conductivity at 25 C 0077 River water 1 Feb 2026 – Feb 2026 1733 µS/cm 25 Feb 2026
Alkalinity to pH 4.5 as CaCO3 0162 River water 1 Feb 2026 – Feb 2026 360 mg/l 25 Feb 2026
Aminomethylphosphonic acid 7125 River water 1 Feb 2026 – Feb 2026 below 0.1 µg/l 25 Feb 2026
Ammonia un-ionised as N 0119 River water 1 Feb 2026 – Feb 2026 below 0.00027 mg/l 25 Feb 2026
Carbon, Organic, Dissolved as C :- {DOC} 0301 River water 1 Feb 2026 – Feb 2026 7.6 mg/l 25 Feb 2026
Chloride 0172 River water 1 Feb 2026 – Feb 2026 290 mg/l 25 Feb 2026
eDNA Report 3047 River water 1 Jan 2025 – Jan 2025 1 text result 6 Jan 2025
Flow Type 2896 River water 21 Jul 2024 – Sep 2026 Dry 11 Sep 2026
Glyphosate 3007 River water 1 Feb 2026 – Feb 2026 below 0.1 µg/l 25 Feb 2026
Mitochondrial marker : Fish 12S 2857 River water 1 Jan 2025 – Jan 2025 Present 6 Jan 2025
Nitrite as N 0118 River water 1 Feb 2026 – Feb 2026 0.022 mg/l 25 Feb 2026
Nitrogen, Total as N 9686 River water 1 Feb 2026 – Feb 2026 8.8 mg/l 25 Feb 2026
Nitrogen, Total Oxidised as N 0116 River water 1 Feb 2026 – Feb 2026 7.6 mg/l 25 Feb 2026
No flow /No sample 7668 River water 34 Jan 2024 – Sep 2026 No flow/discharge at sampling point 11 Sep 2026
Phosphorus, Total as P 0348 River water 1 Feb 2026 – Feb 2026 0.19 mg/l 25 Feb 2026
Silica, reactive as SiO2 0182 River water 1 Feb 2026 – Feb 2026 10 mg/l 25 Feb 2026
Solids, Suspended at 105 C 0135 River water 1 Feb 2026 – Feb 2026 45 mg/l 25 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.