• Ethylene Oxide (EtO) Emissions Investigation South Coast AQMD is conducting special air monitoring to assess Ethylene Oxide emissions
  • All American Asphalt Air Monitoring Initiative Stay informed on the ongoing asphalt batch plant investigation in Irvine
  • South Coast AQMD COVID-19 Operations Update South Coast AQMD Headquarters is closed to the public until further notice. Visit the calendar page for updates on public meeting cancellations, postponements and remote meetings. Committee and Governing Board Meeting locations and instructions for remote participation can be found on the meeting agendas page. Please call 1-800-CUT-SMOG for questions or assistance.

South Coast Air Quality Management District

21865 Copley Dr, Diamond Bar, CA 91765


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