This page updated February 6, 2008.

Geographical areas in the State that exceed the federal air quality standards are called non-attainment areas.  There are 15 non-attainment areas for the federal ozone standard and two non-attainment areas for the PM2.5 standard.  The Ozone SIP and PM2.5 SIP must be adopted and sent to the U.S. Environmental Protection Agency by June 2007 and April 2008, respectively.  The SIP must show how each area will attain the federal standards.  To do this, the SIP will identify the amount of pollution emissions that must be reduced in each area to meet the standard and the emission controls needed to reduce the necessary emissions.

For each area that violates federal air quality standards, local air districts and ARB will craft a plan that will include measures to reduce emissions from sources under local government authority, as well as a strategy for emission reductions from sources under state and federal agency jurisdictions.

Statewide Strategy Approval Documents

Transmittal Letter to U.S. EPA (November 16, 2007)

Board Resolution Adopting 2007 State Strategy - #07-28 (September 27, 2007)

• Attachment A - Technical and Clarifying Modifications to April 26, 2007 Revised Draft Air Resources Board’s Proposed State Strategy for California’s 2007 State Implementation Plan and May 7, 2007 Revised Draft Appendices A through G
• Attachment B - Proposed Modifications to the Air Resources Board’s Proposed State Strategy for California’s 2007 State Implementation Plan that will Achieve 30 Tons Per Day of Additional Emission Reductions in the South Coast by 2014 and 88 to 93 Tons Per Day of Emission Reductions in the San Joaquin Valley by 2017

Board Hearing Transcripts

Executive Order S-07-002 - Relating to the Approval of the State Strategy for California's State Implamentation Plan (SIP) for the Federal 8-hour Ozone and PM2.5 Standards

April 26 State Strategy Documents

Local Air Quality Plan Documents

The links below include documents relating to California nonattainment area regional SIPs. These pages include access to region-specific ARB approval documents, SIP transmittals to U.S. EPA, transportation conformity budgets, reasonable further progress demonstrations, and other technical information supporting the regional SIPs

• South Coast/Coachella Valley 8-hour Ozone and PM2.5 Plans
• San Joaquin Valley 8-hour Ozone Plan
• Proposed Early Progress Plans for Ventura County, Antelope Valley-Western Mojave Desert, Coachella Valley, Eastern Kern County, and Imperial County
  • Appendix
  • Public Notice to Consider Approval of Ozone Early Progress Plans
  • Past Notices