Gas prices are on the way up again. The average price of a gallon of regular gas in Sonoma County is $5.03. That’s two cents higher than Thursday, six cents more than a week ago and eleven cents more than a month ago. The statewide average is eight cents behind the county average at $4.95 per gallon. Sonoma County still has the most expensive gas in the North Bay. The cheapest gas in Sonoma County is at the Valero in Coddingtown where a gallon of unleaded is $4.59.
