Air Quality Planning Program

SCAG's Air Quality Planning Program coordinates with various air quality and transportation stakeholders in Southern California to ensure compliance with the federal, state, and regional air quality requirements.  Federal Clean Air Act Section 176(c) (42 U.S.C. 7506(c)) requires transportation conformity to ensure that federal funding and approval are given to highway and transit projects that are consistent with ("conform to") the air quality goals established by a state air quality implementation plan (SIP). Conformity, to the purpose of the SIP, means that transportation activities will not cause or contribute to new air quality violations, worsen existing violations, or delay timely attainment of the national ambient air quality standards (NAAQS).​

As the federally-designated Metropolitan Planning Organization (MPO) for the six-county Southern California region, SCAG is required by law to be responsible for the transportation conformity determination on the Regional Transportation Plan/Sustainable Communities Strategy (RTP/SCS) and the Federal Transportation Improvement Program (FTIP).  SCAG is also responsible for preparing the regional transportation strategy and control measures portion of the Air Quality Management Plan (AQMP) for the South Coast Air Basin. In addition, SCAG provides the socio-economic growth forecast and transportation activity projections to all the air districts in the SCAG region. 

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