The California Air Resources Board (CARB) gave the biodiesel board a nice end of the year bonus by ending the “oxides of nitrogen (NOx) mitigation requirement for biodiesel blends up to B20 (20% biodiesel) in the Alternative Diesel Fuel (ADF) regulation,” which required the blending of a minimum of 55% renewable diesel with biodiesel blends over smog concerns.

Clean Fuels Alliance America welcomed the action which they first called for in 2022, after CARB data showed the regulatory triggers for lifting the restrictions had been met.

“Sunsetting the NOx requirement in the ADF regulation recognizes what the data has shown for years—that biodiesel is a proven, low-carbon fuel already effectively regulated under the LCFS,” said Jeffrey Earl, Director of State Governmental Affairs at Clean Fuels. “This decision provides regulatory clarity and reinforces biodiesel’s value as a cost-effective compliance option that benefits fuel providers, fleet operators and consumers.”

Clean Fuels will continue challenging CARB to ensure California’s clean fuels policies are grounded in sound data and recognize the reliable performance of low-carbon liquid fuels while maintaining a balanced approach that advances emissions reductions and protects fuel affordability and supply reliability.