PHOENIX (AP) — Gasoline prices around Arizona are slightly lower at the pumps this week.

Officials with Triple-A Arizona said Thursday the average statewide price for unleaded regular gasoline is $2.18 per gallon, down by more than a penny from last week.

This week's national average is $2.29 per gallon, a decrease of nearly 4 cents from last week.

Triple-A analysts say with U.S. oil production increasing and supply levels healthy, gasoline prices could decline further in Arizona.

The East Valley that includes Mesa, Tempe, Chandler, Gilbert, Apache Junction, Queen Creek and Ahwatukee has Arizona's lowest average gasoline price at $2.10 a gallon with Flagstaff the highest at $2.40.

South Carolina has the lowest average gas price among states in the continental U.S. at $2.05 a gallon and California the highest at $2.79.