Cynon water levels

Monitoring stations, source to mouth

No gauged tributary joins the Cynon above Abercynon River Station on the river map. Streams without a gauge are not counted here.

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 Cynon includes the smaller streams that join it there. Every overflow traced is listed here, each stretch in full. Back to the short lists →

Near these gauges, connection not known

Within 3 km of one of the Cynon’s gauges in a straight line, but the river map cannot say whether their water reaches it.

• Hirwaun Tramway Storm Overflow Not discharging
  Dwr Cymru Welsh Water · into Unnamed Stream · 90 m from Hirwaun River Station in a straight line · several watercourses close by, nothing to choose between them · 2025: 1 spill, 0.3 h
• Park Road Abercynon Storm Overflow Discharging now since 00:00 27 Oct
  Dwr Cymru Welsh Water · into Sirhowy River · 270 m from Abercynon River Station in a straight line · its recorded watercourse is not the one mapped beside it · 2025: 0 spills, 0 h
• Woodland Street Storm Overflow Not discharging
  Dwr Cymru Welsh Water · into Afon River · 310 m from Mountain Ash River Station in a straight line · no mapped watercourse close enough to be sure · no official annual figure
• Elizabeth Street Storm Overflow Not discharging
  Dwr Cymru Welsh Water · into Tributary Of River Cynon · 360 m from Aberdare River Station in a straight line · no mapped watercourse close enough to be sure · 2025: 27 spills, 33 h
• Wind Street Storm Overflow Not discharging
  Dwr Cymru Welsh Water · into River Amman · 390 m from Aberdare River Station in a straight line · no mapped watercourse close enough to be sure · 2025: 48 spills, 44 h
• Monk Street No1 Storm Overflow Not discharging
  Dwr Cymru Welsh Water · into River Cynon · 540 m from Aberdare River Station in a straight line · no mapped watercourse close enough to be sure · 2025: 93 spills, 444 h
• Abernant Road Aberdare Storm Overflow Not discharging
  Dwr Cymru Welsh Water · into Nant Wenallt · 630 m from Aberdare River Station in a straight line · its recorded watercourse is not the one mapped beside it · 2025: 27 spills, 22 h
• Aberaman Curre Street Storm Overflow Not discharging
  Dwr Cymru Welsh Water · into Unnamed Stream · 850 m from Aberdare River Station in a straight line · no mapped watercourse close enough to be sure · 2025: 32 spills, 38 h
• Tudor Terrace Rear Storm Overflow Not discharging
  Dwr Cymru Welsh Water · into Gadlys Feeder · 1000 m from Aberdare River Station in a straight line · no mapped watercourse close enough to be sure · 2025: 6 spills, 3.3 h
• Pant-Y-Cerdin Storm Overflow Monitor offline
  Dwr Cymru Welsh Water · into Aberdare Canal · 1.5 km from Aberdare River Station in a straight line · its recorded watercourse is not the one mapped beside it · 2025: 100 spills, 425 h
• Cilmery WwTW Storm Overflow Not discharging
  Dwr Cymru Welsh Water · into Afon Chwefri · 1.9 km from Aberdare River Station in a straight line · several watercourses close by, nothing to choose between them · 2025: 119 spills, 957 h
• Gladstone Street Storm Overflow Not discharging
  Dwr Cymru Welsh Water · into Tributary Of Afon Aman · 1.9 km from Aberdare River Station in a straight line · no mapped watercourse close enough to be sure · 2025: 90 spills, 273 h
• Cynon Street Storm Overflow Not discharging
  Dwr Cymru Welsh Water · into Unnamed Tributary To Afon Amman · 2.0 km from Aberdare River Station in a straight line · its recorded watercourse is not the one mapped beside it · 2025: 2 spills, 0.5 h
• Bron Haul Storm Overflow Not discharging
  Dwr Cymru Welsh Water · into River Cynon · 2.0 km from Aberdare River Station in a straight line · no mapped watercourse close enough to be sure · 2025: 12 spills, 22 h
• Bro Deg 2 Storm Overflow Not discharging
  Dwr Cymru Welsh Water · into River Cynon · 2.1 km from Aberdare River Station in a straight line · no mapped watercourse close enough to be sure · 2025: 70 spills, 214 h

9 more near these gauges whose connection is not known.

14 other overflows within 3 km of these gauges are placed below the Cynon’s lowest gauge or on another river, so not listed.