South Coast Air Quality Management District

South Coast Air Quality Management District is one of the largest and most technologically sophisticated environmental regulatory agencies in the nation. We serve a four-county region that includes all of Orange County and parts of Los Angeles, Riverside, and San Bernardino counties, home to almost 17 million people. South Coast AQMD's headquarters is located in Diamond Bar, 30 miles east of downtown Los Angeles, at the junction of the 57 and 60 freeways.  With a highly diverse and dedicated "Clean Air Team" of over 900 budgeted positions, an annual budget (FY 2019-20) of $170.9  million, South Coast AQMD's mission is to protect public health from air pollution through a comprehensive program of planning, regulation, education, enforcement, compliance incentives, technical innovation, and promotion of public understanding of air quality issues.