Proposed State Strategy for California's State Implementation Plan (SIP)
for the New Federal PM2.5 and 8-Hour Ozone Standards

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


Draft Statewide Air Quality Plan

One of the Air Resources Board’s responsibilities is to propose the State and federal strategy for the SIP to reach the federal standards. The SIP is a comprehensive strategy designed to attain federal air quality standards as quickly as possible through a combination of technologically feasible and cost-effective measures. It outlines ARB staff's assessment of how far adopted regulations will take us towards attainment of federal standards, what new actions could be taken, how the timing of new technology and incentive funds comes into play, and what are the earliest feasible timeframes for meeting standards is likely to be in each region.

Revised Proposed State Strategy for California's 2007 SIP

Appendix C:  Revised Interstate Transport SIP

Continuation of Public Meeting on Proposed State Strategy - September 27-28, 2007

South Coast Air Basin Staff Report


Technical Modifications to April 26, 2007 Revised Draft of Proposed State Strategy


REVISED DRAFT - April 26, 2007

May 7, 2007 Appendices to the April 26, 2007 Revised Draft


DRAFT - January 31, 2007



Local Air Quality Plans




Other Information

Previous Workshops

ARB staff will be holding public meetings to discuss the development of plans for meeting the new federal standards, and to specifically receive public comment on the preliminary State and federal control measures.



If you have any questions or need more information, please contact Mr. Ravi Ramalingam of ARB's Planning and Technical Support Division at (916) 322-2085 or
rramalin@arb.ca.gov.

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