California moved a step closer to offering E15 fuel statewide after the California Air Resources Board proposed regulations needed to implement the state's approval of the higher ethanol blend.
Growth Energy, the nation's largest biofuel trade association, welcomed the proposal, which would establish the technical standards required to allow E15 to be sold at fuel pumps across the state.
E15 contains 15% ethanol and can be used in an estimated 96% of vehicles currently on the road. According to Growth Energy, the fuel has reduced consumer costs by an average of 30 cents per gallon in states where it is already available while providing a lower-emissions fuel option.
California lawmakers approved E15 in 2025 through Assembly Bill 30, but additional regulations are required before retailers can begin offering the fuel. The proposed CARB rule is intended to provide the regulatory framework needed for statewide implementation.
Growth Energy said California's adoption of E15 could create new market opportunities for U.S. corn growers and the ethanol industry by increasing demand for domestically produced renewable fuel. The organization also said broader E15 availability would benefit the state's agricultural economy while expanding fuel choices for consumers.
The association noted that E15 is now legal in all 50 states, making California's regulatory process one of the final steps before the fuel becomes widely available there.
Growth Energy also said it will continue working with state officials, including the California State Fire Marshal's office, to address remaining regulatory requirements related to retailer access and consumer availability.
Source: Growth Energy, "Growth Energy Applauds Progress on E15 Approval in California"