The project is part of Aquarion’s long range plan to meet water needs in southwestern Fairfield County. If approved, it would divert up to 14.2 million gallons a day from the Greater Bridgeport System, which includes the Mill River watershed to the Southwest Regional Pipeline to serve Greenwich, New Canaan, Stamford and Darien. Aquarion spokesman Peter Fazekas said the project is designed to ensure there’s adequate public water supply, improve drought resilience and meet the reservoir release requirements. The state Department of Energy and Environmental Protection has issued a Notice of Tentative Determination to Approve, but limited the annual daily average limitation to 12.56 million gallons a day. A public hearing is slated for May 4 for public comment and an evidentiary one on May 6, DEEP spokesman Will Healey said. Phase three is scheduled to go to bid this fall if the permit is approved, with construction likely starting in 2022 and lasting a few years. This phases could handle a summer capacity of 9.2 million gallons a day. Phase four, which would bring it to the full capacity, would be completed by 2029.