Water company · South Coast
Currently spilling
Serves Hampshire, Isle of Wight, West Sussex, East Sussex, Kent. Major rivers: Test, Itchen, Arun, Adur, Medway.
Southern Water operates 1,048 monitored storm overflows. 2 are currently spilling. 3 monitors are offline. The data records a cumulative discharge of 45 weeks across this operator's network in the last 30 days across an estimated 196 events. The Truth Engine has 30 open flags for this operator's overflows right now.
1,048
Storm overflows
2
Active right now
3
Monitors offline
30
Open flags
49
Spills · last 7 days
45 weeks
Cumulative discharge · 30 days
2.2 h
Avg event length · 30 days
8
Spills · last 24 hours
4,505
spill events
9,944h
cumulative discharge
5 weeks
longest single event
2026-05-06
first event on record
Across 11 water companies in the EA dataset, Southern Water averaged 7.3h per monitored overflow in the last 30 days. The national median was 3.9h per overflow. ranked 8 of 11 of UK water companies by 30-day spill hours per monitored overflow.
The 12 watercourses with the most Southern Water overflows discharging into them.