Cal. Health and Safety Code - HSC § 40200. Section 40200.
A district, which is called the Bay Area Air Quality Management District, which was formerly known as the Bay Area Air Pollution Control District, is hereby continued in existence within the boundaries of the Counties of Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, and Santa Clara and those portions of the Counties of Solano and Sonoma within the boundaries of the Bay Area Air Pollution Control District as it existed on January 1, 1976. Any reference to the Bay Area Air Pollution Control District shall be deemed to be a reference to the Bay Area Air Quality Management District.