High Quality Content by WIKIPEDIA articles! The Bay Area Air Quality Management District (BAAQMD) is a public agency that regulates the stationary sources of air pollution in the nine counties of California`s San Francisco Bay Area: Alameda, Contra Costa, Marin, Napa, San Francisco, San Mateo, Santa Clara, southwestern Solano, and southern Sonoma. The BAAQMD is governed by a Board of Directors composed of 22 elected officials from each of the nine Bay Area counties, and the board has the duty of adopting air pollution regulations for the district.