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5 gauges from Craig Y Nos River Station to Morfa River Station. None of the 4 that can be compared with a typical high is above it. 10 storm overflows upstream are discharging now. Gauges in Powys, Swansea; levels are checked every 15 minutes.
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| Station | Level now | Status |
|---|---|---|
| Craig Y Nos River Station | 0.74 m 17m ago | Within its typical range |
| Teddybear Bridge River Station 10.4 km by river | 1.11 m 17m ago | Within its typical range |
| Ystradgynlais River Station 1.2 km by river | 0.77 m 17m ago | Within its typical range |
| Ynystanglws River Station 16.6 km by river | 1.39 m 17m ago | Within its typical range |
| Morfa River Stationtidal 5.7 km by river | 3.81 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 Tawe 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 Tawe between Ystradgynlais River Station and Ynystanglws River Station, no more than 15.4 km by river above Ynystanglws River Station.
| Gurnos River Station | 0.68 m 17m ago | Within its typical range |
Its water passes Ynystanglws River Station and every gauge below it on the Tawe. It does not pass Ystradgynlais River Station or the gauges above it.
Joins the Tawe between Ystradgynlais River Station and Ynystanglws River Station, no more than 7.4 km by river above Ynystanglws River Station.
| Pontardawe | 0.57 m 17m ago | Within its typical range |
Its water passes Ynystanglws River Station and every gauge below it on the Tawe. It does not pass Ystradgynlais River Station or the gauges above it.
Joins the Tawe between Ynystanglws River Station and Morfa River Station, no more than 3.6 km by river above Morfa River Station.
| Clarion Close River Station | 0.65 m 32m ago | Within its typical range |
Its water passes Morfa River Station and every gauge below it on the Tawe. It does not pass Ynystanglws River Station or the gauges above it.
No gauge below Morfa 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.
46 storm overflows are traced upstream of Morfa River Station, the Tawe’s lowest gauge on the river map: on the Tawe itself, on its gauged tributaries, and on smaller streams that join above there.
Official figures for 2025, for the overflows traced upstream of Morfa River Station: 2,571 spills over 17,908 hours in total, across the 45 that have a figure. 1 has 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 Tawe 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 4 more: show all 7 overflows on this stretch → All above Teddybear Bridge River Station, nearest first →
and 15 more: show all 18 overflows on this stretch → All above Ynystanglws River Station, nearest first →
and 5 more: show all 8 overflows on this stretch → All above Gurnos River Station, nearest first →
and 5 more: show all 8 overflows on this stretch → All above Morfa River Station, nearest first →
Within 3 km of one of the Tawe’s gauges in a straight line, but the river map cannot say whether their water reaches it.
29 more near these gauges whose connection is not known.
1 other overflow within 3 km of these gauges is placed below the Tawe’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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