Receiving watercourse
Severn Estuary
14 monitored storm overflows record Severn Estuary as their receiving watercourse in the National Storm Overflow Hub. 1 is reporting an active spill right now. Operated by Dwr Cymru Welsh Water and Wessex Water.
This watercourse is part of our featured River Severn coverage — that page aggregates the whole river, including tributaries and estuary stretches.
14
Storm overflows
1
Active right now
0
Monitors offline
189
Spill events · 12 months
86,937h
Recorded discharge · 12 months
4
Open discrepancies
Currently spilling· 1
Every monitored overflow· 14
Each links to its full record — spill history, nearby water-quality sampling, citizen reports, and pre-filled accountability letters.
- Machen Close St Mellons Storm OverflowDwr Cymru Welsh Wateractive
- Cardiff Eastern Short Sea Outfall Storm OverflowDwr Cymru Welsh Waterinactive
- Cardiff Eastern Long Sea Outfall Storm OverflowDwr Cymru Welsh Waterinactive
- Barry Town Long Sea Storm OverflowDwr Cymru Welsh Waterinactive
- Penarth Head Storm OverflowDwr Cymru Welsh Waterinactive
- Magor Storm OverflowDwr Cymru Welsh Waterinactive
- WXW00140Wessex Waterinactive
- Barry Town Short Sea Storm OverflowDwr Cymru Welsh Waterinactive
- Caldicot Storm OverflowDwr Cymru Welsh Waterinactive
- Western Valley LG Tanks Storm OverflowDwr Cymru Welsh Waterinactive
- Ocean Park Storm OverflowDwr Cymru Welsh Waterunknown
- Sanderling Close Storm OverflowDwr Cymru Welsh Waterinactive
- Cardiff Central Storm OverflowDwr Cymru Welsh Waterinactive
- Penarth Marina 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.