Fort Lauderdale, FL – The cost of filling your gas tank may have gone up this week, as the nation’s average fuel costs reversed course and pumped upward almost one-and-a-half cents, on average, according to the U.S. Energy Information Administration. The average cost of a gallon of unleaded gas is now $2.31.

The surge in prices was largely due to dramatic price increases across the Midwest and West Coast regions, both which inflated the national average. Prices increased only slightly or went down in every other region, dropping noticeably in both Atlantic regions.

The cost of diesel increased this week, but only just, according to the E.I.A. The average cost of diesel went up about a penny per gallon and is now $2.57.

Regional cost averages for both gasoline and diesel are listed below, ranked from highest to lowest price.

Regional Gasoline Averages:

$2.732: PADD 5 WEST COAST (INCL. CA)
$2.487: PADD 5 WEST COAST (W/O CA)
$2.424: PADD 1b CENTRAL ATLANTIC
$2.296: PADD 1a NEW ENGLAND
$2.293: PADD 1 EAST COAST
$2.230: PADD 4 ROCKY MOUNTAIN
$2.213: PADD 2 MIDWEST
$2.195: PADD 1c LOWER ATLANTIC
$2.080: PADD 3 GULF COAST

Regional Diesel Averages:

$2.869: PADD 5 WEST COAST
$2.765: PADD 1b CENTRAL ATLANTIC
$2.668: PADD 1a NEW ENGLAND
$2.626: PADD 1 EAST COAST
$2.522: PADD 4 ROCKY MOUNTAIN
$2.519: PADD 1c LOWER ATLANTIC
$2.487: PADD 2 MIDWEST
$2.424: PADD 3 GULF COAST

Note: PADD is an acronym for Petroleum Administration for Defense Districts.