Bay Area Air Quality Management District
（重定向自BAAQMD）
![Sources of particulate pollution in Santa Clara County, CA. For comparison, the total tons of PM 2.5 from wood combustion statewide is 39.756 tons per year. So Santa Clara County accounts for 4% of the PM 2.5 from wood burning.](/Images/godic/202412/22/Santa_Clara_County_PM_25_by_Source4004.gif")
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.