Photo courtesy of Wikipedia.

Photo courtesy of Wikipedia.

The slide in gasoline prices continued, as the national average price for a gallon fell 4.8 cents to $2.327 for the week ending Sept. 21, according to federal data.

Gasoline now costs $1.026 less than it did a year ago, according to the U.S. Department of Energy. Gasoline prices continued their fall across nine regions tracked by the agency, including an 8.1-cent slide to $2.911 on the West Coast. In the Midwest, the average price fell nine-tenths of a cent to $2.271.

Three states now have an average gasoline price of at least $3 per gallon, including Alaska ($3.132), California ($3.057), and Nevada ($3.001). At the other end of the spectrum, five states have gasoline prices below $2 per gallon, including Louisiana ($1.995), Tennessee ($1.991), Alabama ($1.949), Mississippi ($1.933), and South Carolina ($1.901), according to the AAA's Daily Fuel Gauge Report.

Meanwhile, the average price of diesel fell 2.4 cents to $2.493. Diesel is now $1.285 lower than a year ago.