Receiving watercourse
Afon Cefni
6 monitored storm overflows record Afon Cefni as their receiving watercourse in the National Storm Overflow Hub. Operated by Dwr Cymru Welsh Water.
6
Storm overflows
0
Active right now
0
Monitors offline
16
Spill events · 12 months
560h
Recorded discharge · 12 months
1
Open discrepancies
Every monitored overflow· 6
Each links to its full record — spill history, nearby water-quality sampling, citizen reports, and pre-filled accountability letters.
- Cycle Way Llangefni Storm OverflowDwr Cymru Welsh Waterinactive
- High Street Malltraeth Storm OverflowDwr Cymru Welsh Waterinactive
- Malltraeth OverflowDwr Cymru Welsh Waterinactive
- Llangefni WwTW Storm OverflowDwr Cymru Welsh Waterinactive
- Llangefni Main Storm OverflowDwr Cymru Welsh Waterinactive
- Gaerwen WwTW Storm OverflowDwr Cymru Welsh Waterinactive
Seen something?
Sewage debris, foam, dead fish — citizen sightings are cross-referenced against the official discharge data above and strengthen the public record.