Bay Area Air Quality Management District

The California Legislature created the  Bay Area Air Quality Management District in 1955 as the first regional air pollution control agency in the country.  The Air District is tasked with regulating stationary sources of air pollution in the nine counties that surround San Francisco Bay: Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, southwestern Solano, and southern Sonoma counties.