• South Coast Air Quality Management Dist.

    21865 COPLEY DR.
    DIAMOND BAR, CA 91765
    (909) 396-3199
    • About

      SCAQMD is the air pollution control agency for all of Orange County and the urban portions of Los Angeles, Riverside and San Bernardino counties, among the smoggiest regions of the U.S. We are committed to protecting the health of residents, while remaining sensitive to businesses.