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9 gauges from Usk Reservoir No1 River Station to Usk Town River Station. None of the 7 that can be compared with a typical high is above it. 1 storm overflow upstream is discharging now. Gauges in Monmouthshire, Powys; levels are checked every 15 minutes.
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| Station | Level now | Status |
|---|---|---|
| Usk Reservoir No1 River Stationstructure | 0.16 m 17m ago | Within its typical range |
| Trallong River Station 14.6 km by river | 0.68 m 17m ago | Within its typical range |
| Brecon Promenade River Station 11.5 km by river | 0.85 m 17m ago | Within its typical range |
| Llandetty River Station 16.3 km by river | 1.17 m 17m ago | Within its typical range |
| Crickhowell River Station 10.6 km by river | 0.46 m 17m ago | Within its typical range |
| Llanfoist Bridge Abergavenny 13.2 km by river | 1.35 m 17m ago | Within its typical range |
| Chainbridge River Station 15.2 km by river | 1.34 m 17m ago | Within its typical range |
| Trostrey Weir River Stationstructure 3.6 km by river | 0.85 m 17m ago | Within its typical range |
| Usk Town River Station 4.6 km by river | 0.77 m 17m 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 Usk 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 Usk between Usk Reservoir No1 River Station and Trallong River Station, no more than 8.6 km by river above Trallong River Station.
| Pont Hen Hafod River Station | 0.41 m 17m ago | Within its typical range |
Its water passes Trallong River Station and every gauge below it on the Usk. It does not pass Usk Reservoir No1 River Station or the gauges above it.
Joins the Usk between Trallong River Station and Brecon Promenade River Station, no more than 6.5 km by river above Brecon Promenade River Station.
| Pont Ar Yscir River Station | 0.37 m 32m ago | Within its typical range |
Its water passes Brecon Promenade River Station and every gauge below it on the Usk. It does not pass Trallong River Station or the gauges above it.
Joins the Usk between Crickhowell River Station and Llanfoist Bridge Abergavenny, no more than 12.0 km by river above Llanfoist Bridge Abergavenny.
| Millbrook River Station | 0.26 m 32m ago | Within its typical range |
Its water passes Llanfoist Bridge Abergavenny and every gauge below it on the Usk. It does not pass Crickhowell River Station or the gauges above it.
No gauge below Usk Town River Station is known on the river map.
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.
34 storm overflows are traced upstream of Usk Town River Station, the Usk’s lowest gauge on the river map: on the Usk itself, on its gauged tributaries, and on smaller streams that join above there.
Official figures for 2025, for the overflows traced upstream of Usk Town River Station: 1,707 spills over 16,615 hours in total, across the 31 that have a figure. 3 have no 2025 figure.
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 Usk includes the smaller streams that join it there. Where a stretch or a tributary has more than 4, the 3 discharging now or nearest its gauge are listed, the rest are counted, and every one is in that gauge’s “Upstream of here” list. Show every overflow in every stretch →
and 2 more: show all 5 overflows on this stretch → All above Trallong River Station, nearest first →
and 6 more: show all 9 overflows on this stretch → All above Llandetty River Station, nearest first →
and 11 more: show all 14 overflows on this stretch → All above Llanfoist Bridge Abergavenny, nearest first →
Within 3 km of one of the Usk’s gauges in a straight line, but the river map cannot say whether their water reaches it.
3 other overflows within 3 km of these gauges are placed below the Usk’s lowest gauge or on another river, so not listed.
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: © Dŵr Cymru Welsh Water, from its Storm Overflow Map. 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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