Bay Area Air Quality Management District. BAAQMD is the regional, government agency that regulates sources of air pollution within the nine San Francisco Bay Area Counties. The Air District's jurisdiction includes Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, southwestern Solano, and southern Sonoma counties.

Bay Area Air Quality Management District - The regional agency created by the state legislature for the Bay Area air basin (Alameda, Contra Costa, half of Solano, half of Sonoma, Marin, Napa, San Francisco, San Mateo, Santa Clara counties) that develops, in conjunction with MTC and ABAG, the air quality plan for the region. BAAQMD has an active role in approving the TCM (see p. 13) plan for the region, and in controlling stationary and indirect sources of air pollution.