Receiving watercourse
Irish Sea
17 monitored storm overflows on the Irish Sea are listed in the National Storm Overflow Hub. Operated by Dwr Cymru Welsh Water and United Utilities.
17
Storm overflows
0
Active right now
0
Monitors offline
1,024
Spill events · 12 months
4,289h
Recorded discharge · 12 months
3
Open discrepancies
Every monitored overflow· 17
Each links to its full record — spill history, nearby water-quality sampling, citizen reports, and pre-filled accountability letters.
- UUP01843United Utilitiesinactive
- UUP00906United Utilitiesinactive
- UUP00306United Utilitiesinactive
- UUP02175United Utilitiesinactive
- UUP00870United Utilitiesinactive
- UUP01009United Utilitiesinactive
- UUP01523United Utilitiesinactive
- UUP00116United Utilitiesinactive
- UUP02117United Utilitiesinactive
- UUP01238United Utilitiesinactive
- UUP00455United Utilitiesinactive
- UUP01132United Utilitiesinactive
- UUP02081United Utilitiesinactive
- UUP01260United Utilitiesinactive
- UUP01713United Utilitiesinactive
- UUP02079United Utilitiesinactive
- Rhosneigr 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.