The national average price of diesel dropped 1.8 cents per gallon, reaching $2.799 for the week ending Monday, June 4, 2007.
The Energy Information Administration reported slight average decreases across the board in each of nine regions around the U.S.
Remaining supplies of low-sulfur diesel dropped 2 cents on average nationwide from $2.752 to $2.732.
Ultra-low sulfur diesel, which makes up more than 60 percent of the on-highway supply, was down an average of 1.7 cents from $2.836 to $2.819 per gallon, EIA reported.
The biggest decrease by region for ULSD was 2.5 cents in both the Gulf Coast region and the Lower Atlantic region, where prices went from $2.782 to $2.757 and from $2.799 to $2.774 respectively.
Drivers in the Rocky Mountain region finally saw average ULSD prices come down 2.1 cents to $2.965 after several weeks at or above the $3 mark.
The East Coast region had an average price of $2.815 for ULSD, down 1.8 cents from $2.833.
ULSD in the Central Atlantic region dropped 1.1 cents to average $2.867.
The New England region saw an average decrease of five-tenths of a cent from $2.885 to $2.880 per gallon for ULSD.
ULSD in the Midwest averaged $2.787, down 1.5 cents from $2.802 per gallon.
In California, where supplies are 100 percent ULSD for on-highway use, the average price was $2.972 per gallon, down three-tenths of a cent from the previous week.
The West Coast region had a price of $2.939, down seven-tenths of a cent from the previous week’s average of $2.946 per gallon of ULSD.