Bay Area Air District Public Data Catalog

The Bay Area Air District (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. This site provides access to datasets developed by the Air District to support planning efforts, environmental review, and other projects. For questions, please contact the Air District.