Petrolia is an unincorporated community in Humboldt County, California, 10 miles southeast of Cape Mendocino, at an elevation of 121 feet above sea level, within ZIP Code 95558, and area code 707. Petrolia was the site of the first oil well drilled in California.
Elevation: 121 ft (37 m)
Country: United States
State: California
County: Humboldt
Area code: 707
Official name: California's First Drilled Oil Wells
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