SIOUX FALLS, S.D. (KELO AM) - The United States' average retail price for regular gasoline fell to its lowest level since April 2009 to $2.04 a gallon Monday.
That's down 1.6 cents from a week ago, according to the U.S. Energy Information Administration.
Pump prices were highest in the West Coast states at 2.51 a gallon and lowest in the Gulf Coast states at 1.79.
AAA South Dakota says the average price of gas in Sioux Falls is 1.87, ranging from 1.69 to 2.19.