If approved, a water recycling plant capable of producing 11 million litres (2.4 million gallons) of purified water would be built near Lowestoft.
Two partly buried reservoirs – one near the existing Lodgewood Water Tower in Sibton, near Saxmundham, and one near Eye airfield – would also be built, storing water for use during dry periods. About 50 miles (80km) of pipelines would be installed.
“We currently have sufficient water supplies to support our existing households and business customers, so that is fine and secure,” said Ms Gower.
“The challenge we have is meeting the extra demand from new commercial developments and commercial customers who want to connect to our water supplies.
“We need to create the supply capacity and connectivity to be able to do that.”