Motorists who suspect gasoline is far more expensive in the Bay Area and the rest of California are not imagining things, according to a new federal report that shows gas in this region is costly compared to the nation overall.

During the one-year period that ended in August, the average price of gasoline rose 8.9 percent in the Bay Area, and 7.6 percent in the Los Angeles area, the U.S. Bureau of Labor Statistics reported.

Over the same 12 months, gasoline prices rose 2.1 percent in the United States.

In August, gasoline averaged $4.14 per gallon in San Francisco compared to $3.76 nationwide in August, roughly 10 percent above the U.S. average.