The average national retail price of diesel has increased from last week’s per gallon price of $2.012 to the current level of $2.053, the U.S. Energy Department announced Oct. 4. The highest prices in the nation continue in California, where the price currently averages $2.290 per gallon, and in the West Coast region, where the price stands at $2.238. In New England, the price is $2.155; in the Central Atlantic, the price is $2.144; in the East Coast, the price is $2.058; $2.013 in the Lower Atlantic states, $2.019 in the Midwest, and $2.000 in the Gulf Coast region; and $2.065 in the Rocky Mountain states.