The California Energy Commission reports that California relies on a diverse supply of energy, in the forms of electricity, petroleum, and natural gas. The state receives 78% of its electricity supply from in state sources, including natural gas, nuclear power, hydroelectric power, coal, and renewable energy sources.  California receives 37% and 15% of its petroleum and natural gas resources, respectively, from in state energy sources.

As the above graph shows, California uses a large amount of renewable sources, particularly in the area of hydroelectric power. There are two major nuclear reactors in California, five wind farms, and 386 hydroelectric dams.  However, natural gas makes up the majority of California’s energy gross. California relies mainly on foreign petroleum, in-state electricity providers, and natural gas from the Southwest United States. Click here to see all of California’s energy sources.