California Air Resources Board is the "clean air agency" of the state of California in the United States. Established originally as the Air Resources Board in 1967, it is known for setting extremely stringent standards for air quality, resulting in the manufacture of special gasoline for automobiles in the state.

Its stated goals are to:

• Attain and maintain healthy air quality.
• Conduct research into the causes of and solutions to air pollution.
• Systematically attack the serious problem caused by motor vehicles, which are the major causes of air pollution in the State.

The governing board is made up of eleven members are appointed by the state's governor, where the chairman is the only full-time member.

Half of the appointees are experts in professional and science fields such as medicine, chemistry, physics, meteorology, engineering, business, and law. Others represent the pollution control agencies of other regional areas - Los Angeles region, San Francisco Bay area, San Diego, and the San Joaquin Valley, and one for other districts.