According to this web site. The differences in prices people
are sending in don't jive with what the state taxes are. Washington
says 23 cents per gallon and California says 18 cents per gallon, so why
is California at $2.05 to $2.25 and Washington around 1.75?
Most of the regional variation in gas prices is due to
differing state gas tax rates. This link will take you to a table
of the tax rates in all US states: