Helstone Water upstream of Carnon at Grenna

Where and when

Last sampled

2 Jul 2025, 12:2015 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 8 Oct 2026 and had nothing newer.

Samples banked

7 since 16 Oct 2023 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 178342, 40826As published, to the nearest 1 m. Open in a map

River, by its own name

Helstone Water Upstrwam Carnon

River, by the map

Carnon RiverPlaced on a river whose name partly matches its own, 16 m from the line.

Next gauge downstream

None tracedIts water reaches the sea without passing a gauge.

Nearest gauge upstream

Bissoe On the Carnon River · 1.0 km along the river

Why it was sampled

Monitoring (national agency policy) (6 samples)
Planned investigation (local monitoring) (1 samples)

Main measurements, river water

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.