Welcome! The South Coast AQMD is the air pollution control agency for all of Orange County and the urban portions of Los Angeles, Riverside and San Bernardino counties, the smoggiest region of the U.S. We are committed to protecting the health of residents, while remaining sensitive to businesses. Enjoy our video collection and check out the live stream of our Governing Board meetings on the first Friday of each month, except August, beginning at 9 a.m. Visit our website at www.aqmd.gov.