Manchester Ship Canal at Irlam Locks

EA name: MANCHESTER SHIP CANAL AT IRLAM LOCKS
Environment Agency sampling point NW-88002440 · 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
31 Jul 2026, 10:482 months ago · time as the Environment Agency records it (UK clock time; the source gives no time zone)
Samples banked
34 since 5 Oct 2023 Imported periods: 1 Oct 2023 – 30 Sep 2026. Samples outside them are not shown here.
Latest sample
Canal water Monitoring (national agency policy)
Where
National Grid 372840, 394204As published, to the nearest 1 m. Open in a map
River, by its own name
Manchester Ship Canal
River, by the map
Manchester Ship CanalPlaced on the river its name gives, 25 m from the line. A canal or a line with no direction: not followed.
Next gauge downstream
Not known
Why it was sampled
Environmental monitoring statutory (EU directives) (28 samples)
Monitoring (national agency policy) (6 samples)

Everything measured here

21 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 21 rows
DeterminandMaterialResults First – lastLatest result
Oxygen, Dissolved, % Saturation 9901 Canal water 32 Oct 2023 – Jul 2026 87.7% 31 Jul 2026
Oxygen, Dissolved as O2 9924 Canal water 32 Oct 2023 – Jul 2026 8 mg/l 31 Jul 2026
Temperature of Water 0076 Canal water 32 Oct 2023 – Jul 2026 19.7 °C 31 Jul 2026
pH 0061 Canal water 32 Oct 2023 – Jul 2026 7.15 31 Jul 2026
Ammoniacal Nitrogen as N 0111 Canal water 32 Oct 2023 – Jul 2026 0.33 mg/l 31 Jul 2026
Nitrate as N 0117 Canal water 32 Oct 2023 – Jul 2026 9.27 mg/l 31 Jul 2026
Orthophosphate, reactive as P 0180 Canal water 32 Oct 2023 – Jul 2026 1.6 mg/l 31 Jul 2026
Conductivity at 25 C 0077 Canal water 32 Oct 2023 – Jul 2026 581 µS/cm 31 Jul 2026
Alkalinity to pH 4.5 as CaCO3 0162 Canal water 32 Oct 2023 – Jul 2026 84 mg/l 31 Jul 2026
Ammonia un-ionised as N 0119 Canal water 32 Oct 2023 – Jul 2026 0.00178 mg/l 31 Jul 2026
BOD : 5 Day ATU 0085 Canal water 28 Oct 2023 – Jul 2026 below 5 mg/l 31 Jul 2026
Cadmium, Dissolved 0106 Canal water 6 Oct 2023 – Mar 2024 0.015 µg/l 7 Mar 2024
Calcium, Dissolved 0239 Canal water 6 Oct 2023 – Mar 2024 42 mg/l 7 Mar 2024
Carbon, Organic, Dissolved as C :- {DOC} 0301 Canal water 6 Oct 2023 – Mar 2024 6.1 mg/l 7 Mar 2024
Chloride 0172 Canal water 32 Oct 2023 – Jul 2026 60 mg/l 31 Jul 2026
Chloroform :- {Trichloromethane} 3373 Canal water 28 Nov 2023 – Jul 2026 0.52 µg/l 31 Jul 2026
Chlorophyll : Acetone Extract 7887 Canal water 31 Oct 2023 – Jul 2026 60 µg/l 31 Jul 2026
Magnesium, Dissolved 0235 Canal water 6 Oct 2023 – Mar 2024 6.4 mg/l 7 Mar 2024
Nitrite as N 0118 Canal water 32 Oct 2023 – Jul 2026 0.13 mg/l 31 Jul 2026
Nitrogen, Total Oxidised as N 0116 Canal water 32 Oct 2023 – Jul 2026 9.4 mg/l 31 Jul 2026
Solids, Suspended at 105 C 0135 Canal water 32 Oct 2023 – Jul 2026 8.6 mg/l 31 Jul 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.