The final environmental study for a proposed desalination plant in El Segundo will soon be released, the City Council for adjacent Manhattan Beach learned this week, when it received its first formal presentation on the potential project — even though the West Basin Municipal Water District first pitched the plant in 2015.

If approved, the proposed $400 million plant — which would border El Porto, in El Segundo — would be capable of converting 20-to-60 million gallons of ocean water to drinkable water each day. District officials have said the plant is crucial to diversifying the region’s water supply, in case there’s an emergency or a severe drought.