2 gauges from Glyn Neath River Station to Resolven River Station. None is above its typical high. 3 storm overflows upstream are discharging now. Gauges in Neath Port Talbot; levels are checked every 15 minutes.
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.
Streams and rivers with a gauge whose water joins the Neath above one of its gauges, from the source down. Named streams without a gauge that have a page here are listed at the end.
Named streams on the river map that flow into the Neath and have no gauge of their own. Each has a page with what is known about it: the next gauge downstream, and any storm overflows or water-sampling points placed on it.
13 storm overflows are traced upstream of Resolven River Station, the Neath’s lowest gauge on the river map: on the Neath itself, on its gauged tributaries, and on smaller streams that join above there.
3 report discharging now
10 not discharging
0 offline or silent: 0 monitor offline, 0 status unknown, 0 no live feed
Official figures for 2025, for the overflows traced upstream of Resolven River Station: 1,099 spills over 10,472 hours in total, across all 13.
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 Neath includes the smaller streams that join it there.
Above Glyn Neath River Station, the Neath’s highest gauge4 overflows · 2 discharging now
Onllwyn Storm OverflowNot discharging Dwr Cymru Welsh Water · into Afon Camnant · 10.5 km by river above Glyn Neath River Station · 2025: 111 spills, 1,117 h
Heol Pendarren Storm OverflowNot discharging Dwr Cymru Welsh Water · into Ditch To Nant Gwrangon · 7.2 km by river above Glyn Neath River Station · 2025: 48 spills, 89 h
Hirwaun Industrial Estate WwTW Storm OverflowDischarging now since Dwr Cymru Welsh Water · into Afon Camnant · 6.7 km by river above Glyn Neath River Station · 2025: 170 spills, 3,661 h
Pontneddfechan WwTW Storm OverflowDischarging now since Dwr Cymru Welsh Water · into River Mellte · 2.4 km by river above Glyn Neath River Station · 2025: 180 spills, 1,616 h
Between Glyn Neath River Station and Resolven River Station9 overflows · 1 discharging now
Bethel Road Glynneath Storm OverflowNot discharging Dwr Cymru Welsh Water · into River Neath · 9.7 km by river above Resolven River Station · 2025: 37 spills, 94 h
High Street Gellidawel Road Storm OverflowNot discharging Dwr Cymru Welsh Water · into River Neath · 8.9 km by river above Resolven River Station · 2025: 110 spills, 517 h
Godfrey Avenue Rear Storm OverflowNot discharging Dwr Cymru Welsh Water · into River Neath · 8.3 km by river above Resolven River Station · 2025: 78 spills, 294 h
Chain Road Storm OverflowNot discharging Dwr Cymru Welsh Water · into River Neath · 7.8 km by river above Resolven River Station · 2025: 67 spills, 505 h
Cwmgwrach WwTW Storm OverflowDischarging now since Dwr Cymru Welsh Water · into River Neath · 6.9 km by river above Resolven River Station · 2025: 113 spills, 1,331 h
Heol Tonmaen Storm OverflowNot discharging Dwr Cymru Welsh Water · into River Neath · 2.1 km by river above Resolven River Station · 2025: 17 spills, 8.5 h
B4434 Roundabout Resolven Storm OverflowNot discharging Dwr Cymru Welsh Water · into River Neath · 1.9 km by river above Resolven River Station · 2025: 34 spills, 28 h
Resolven WwTW Storm OverflowNot discharging Dwr Cymru Welsh Water · into River Neath · 1.1 km by river above Resolven River Station · 2025: 67 spills, 585 h
Moses Row Storm OverflowNot discharging Dwr Cymru Welsh Water · into Melin Court Brook · 1.1 km by river above Resolven River Station · 2025: 67 spills, 627 h
Near these gauges, connection not known
Within 3 km of one of the Neath’s gauges in a straight line, but the river map cannot say whether their water reaches it.
Plas Y Coed Storm OverflowNot discharging Dwr Cymru Welsh Water · into River Neath · 1.3 km from Glyn Neath River Station in a straight line · no mapped watercourse close enough to be sure · 2025: 57 spills, 82 h
1 other overflow within 3 km of these gauges is placed below the Neath’s lowest gauge or on another river, so not listed.
