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3 gauges from Vyrnwy Weir River Station to Meifod River Station. None of the 2 that can be compared with a typical high is above it. Gauges in Powys; levels are checked every 15 minutes.
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| Station | Level now | Status |
|---|---|---|
| Vyrnwy Weir River Stationstructure | 0.26 m 18m ago | Within its typical range |
| Pont Robert River Station 18.6 km by river | 1.31 m 33m ago | Within its typical range |
| Meifod River Station 7.1 km by river | 1.39 m 33m ago | Within its typical range |
Stations are listed from source to mouth as the water flows, traced on the river map (OS Open Rivers) and the Environment Agency’s own links between its gauges. A distance “by river” is along the river, and is shown only where the map traces the path.
Contains OS data © Crown copyright and database rights 2026.
Streams and rivers with a gauge whose water joins the Vyrnwy (Efyrnwy) above one of its gauges, from the source down. Named streams without a gauge that have a page here are listed at the end.
Joins the Vyrnwy (Efyrnwy) between Pont Robert River Station and Meifod River Station, no more than 23.1 km by river above Meifod River Station.
| Llanerfyl River Station | 1.40 m 33m ago | Within its typical range |
Its water passes Meifod River Station and every gauge below it on the Vyrnwy (Efyrnwy). It does not pass Pont Robert River Station or the gauges above it.
Below Meifod River Station, its water next reaches Llanymynech River Station, 21.4 km by river downstream.
Tributaries and where they join are traced on the river map (OS Open Rivers, edition 2026-04) and the Environment Agency’s links between its gauges. The map holds distances between gauges, not the junctions themselves, so a junction is placed between two gauges, and no further up than the tributary’s own lowest gauge. Contains OS data © Crown copyright and database rights 2026.
4 storm overflows are traced upstream of Meifod River Station, the Vyrnwy (Efyrnwy)’s lowest gauge on the river map: on the Vyrnwy (Efyrnwy) itself, on its gauged tributaries, and on smaller streams that join above there.
Official figures for 2025, for the overflows traced upstream of Meifod River Station: 132 spills over 1,868 hours in total, across all 4.
Each overflow is listed in the stretch above the first gauge its water reaches, from the source down, as on the Gauges tab. A stretch of the Vyrnwy (Efyrnwy) includes the smaller streams that join it there.
Within 3 km of one of the Vyrnwy (Efyrnwy)’s gauges in a straight line, but the river map cannot say whether their water reaches it.
A status is the water company’s own monitor: it says whether an overflow is discharging, never how much or why, and a spill does not by itself explain a change in a river level. A status older than two hours is shown as unknown. Annual figures are the official returns: 12/24-hour spills for England and Wales, overflow events for Scotland (Scottish Water counts differently, so the two cannot be compared). “No data” means the monitor produced no usable data that year, not zero. Overflows are placed on OS Open Rivers (edition 2026-04), which leaves out many small channels: an overflow the map cannot place may still drain here. Contains OS data © Crown copyright and database rights 2026. Sewage in Britain’s rivers →
Live status: © Hafren Dyfrdwy storm overflow activity data, licensed under CC BY 4.0. Annual figures for Wales: Dŵr Cymru Welsh Water’s return to Natural Resources Wales, as compiled by The Rivers Trust, Open Government Licence.
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