Gasoline prices at the pump around Arizona are lower for the fourth consecutive week. Officials with AAA Arizona say that the average statewide price for unleaded regular gasoline is at $3.27 a gallon. That is more than a penny lower than last week. This week's national average is at $3.35 per gallon, down by less than one-cent from the previous week. The East Valley area of Phoenix has Arizona's lowest average gasoline price at $3.17 a gallon while Flagstaff has the highest at $3.52. South Carolina has the lowest average gas prices in the continental U.S. at three-14 a gallon with California having the highest at $3.79 a gallon.