Air Quality Planning

Ozone Design Value - Historical (for website)

Air quality plans provide an overview of the region's air quality and identify the pollution-control measures needed to expeditiously attain and maintain air quality standards.  The District's plans include the San Diego Regional Air Quality Strategy (RAQS), addressing State requirements, and the San Diego portion of the California State Implementation Plan (SIP), addressing federal requirements.

State Plans

The California Clean Air Act (CCAA) of 1988 requires the air districts to endeavor, achieve and maintain the state ambient air quality standards by the earliest practicable date and develop plans for attaining the state ozone, carbon monoxide, sulfur dioxide, and nitrogen dioxide standards. 

In compliance with the CCAA, the San Diego County Air Pollution Control District prepared and submitted the 1991 Regional Air Quality Strategy (RAQS) to address San Diego County's nonattainment status for ozone. The RAQS is designed to make expeditious progress toward attaining the state ozone standard and contains preliminary implementation schedules for control programs on stationary sources, transportation, indirect sources, and a vehicle/fuels program. 


Year Report Description Attachments (if applicable)
2016 RAQS Revision
Attachment I, Attachment II
2009 RAQS Revision Attachment IAttachment II
2005 Measures to Reduce PM N/A
2004 RAQS Progress Report N/A
2004 RAQS Revision N/A
2001 RAQS Revision N/A


Federal Plans

The U.S. Environmental Protection Agency (EPA) has established National Ambient Air Quality Standards (NAAQS) for six criteria pollutants, which are known to be harmful to human health and welfare. These criteria pollutants are:

  • Carbon Monoxide (CO)
  • Lead (Pb)
  • Nitrogen Dioxide (NO2)
  • Ozone (O3)
  • Particulate Matter (PM)
  • Sulfur Oxides (SOx)

The federal Clean Air Act (CAA) requires plans which identify how nonattainment areas will attain and/or maintain the NAAQS. The CAA requires the EPA to review each plan, any plan revisions, and to approve the plan/revisions if consistent with the CAA.

Key elements of these plans include emission inventories, emission control strategies and rules, air quality data analyses, modeling, air quality progress and attainment or maintenance demonstrations. 


Past Events

The District held a public meeting on September 8, 2016, to discuss a draft proposed update of the Regional Air Quality Strategy (RAQS) to expeditiously attain the state ozone standards (limits) in San Diego County, and a draft proposed Eight-Hour Ozone Attainment Plan and Reasonably Available Control Technology (RACT) Demonstration to expeditiously attain the federal ozone standard in San Diego County. 

Workshop Video (9/8/16)