South Coast Air Quality Management District

  • Government Agencies/Institutions
21865 Copley Dr
Diamond Bar, CA 91765-4178
(909) 396-3194
(909) 396-3636 (fax)

  • About

    The South Coast Air Quality Management District (AQMD) is the air pollution control agency for all of Orange County and the urban portions of Los Angeles, Riverside & San Bernadino counties, the smoggiest region of the U.S. AQMD is committed to protecting the health of residents, while remaining sensitive to businesses.

  • Whom to Contact