River Walkham at Merrivale Bridge

EA name: RIVER WALKHAM AT MERRIVALE BRIDGE
Environment Agency sampling point SW-81241155 · 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: 28 Mar 20188.5 years ago, before the imported period. The newest of the 194 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 255001, 75120As published, to the nearest 1 m. Open in a map
River, by its own name: Walkham
River, by the map: River WalkhamPlaced on the river its name gives, 26 m from the line.
Next gauge downstream: Horrabridge On the River Walkham · 8.0 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 28 Mar 2018, 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.