Carnon at Twelveheads upstream of St Day Stream

EA name: CARNON AT TWELVEHEADS U/S ST DAY STREAM (also listed as “CARNON RIVER AT TWELVEHEADS, ABOVE ST DAY STREAM”)
Environment Agency sampling point SW-81950636 · 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: 17 Jun 20197.3 years ago, before the imported period. The newest of the 115 samples the Environment Agency's archive lists here, as it listed them on 7 Oct 2026. Nothing was published here 1 Oct 2023 – 8 Oct 2026, the period imported here, so no result is shown below.
Samples banked: None Imported periods: 1 Oct 2023 – 8 Oct 2026. Samples outside them are not shown here.
Where: National Grid 176050, 42309As published, to the nearest 1 m. Open in a map
River, by its own name: Carnon
River, by the map: Carnon RiverPlaced on the river its name gives, 104 m from the line.
Next gauge downstream: Bissoe On the Carnon River · 1.9 km along the river

Everything measured here

No results were published for this point in the imported periods. That says nothing about the water: it was not sampled then, or its results are not public yet. Its newest sample in the archive, from 17 Jun 2019, is older than that and is not imported here.

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.