The average price of a gallon of regular gas in Sonoma County is soaring. Today, it is $5.60, up three cents from Sunday, up 38 cents in the past week and up 59 cents in the past month. The statewide average is now $5.35 per gallon, up a quarter from last Monday. The cheapest gas in Sonoma County is at the 76 station in Cotati, where a gallon of unleaded is $5.09.
