Anglian Water has said a hosepipe ban "won't be necessary" this summer.
The company has said "long-term investments" will keep taps running, even if there is a heatwave this summer.
Anglian Water takes water from a 50/50 split between reservoirs and groundwater sources, known as aquifers.
It has told its customers the reservoirs are over 90% full, on average, after "the wettest 18 months on record".