California State Implementation Plans | California Air Resources Board

California State Implementation Plans

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2026 State Implementation Plan Revisions for the California Extreme Ozone Nonattainment Areas

2026 Updates to Motor Vehicle Emissions Budgets for the San Joaquin Valley 75 parts per billion Ozone State Implementation Plan

2025 South Coast Air Basin Contingency Measure for the 2015 8-Hour Ozone Standard

2025 Updates to Motor Vehicle Emissions Budgets for California Ozone State Implementation Plans

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2024 Transport State Implementation Plan Amendment

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2023 Carbon Monoxide SIP Revision

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2024 San Joaquin Valley PM2.5 Plan

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2023 Mariposa County Ozone Attainment Plan

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2023 Mariposa County Reasonably Available Control Technology SIP

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2023 Mammoth Lakes PM10 Planning Area Second 10-Year Maintenance Plan

Mobile Source Strategy

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2025 Mobile Source Strategy

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2023 Eastern Kern Reasonably Available Control Technology SIP

California Smog Check Contingency Measure

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2023 Ozone Attainment Plan for Western Nevada County

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Western Mojave Desert 70 ppb Ozone Attainment Plan

South Coast 2022 Air Quality Management Plan

2022 Ventura County 8-Hour Ozone Plan

2022 Coachella Valley 75 ppb 8-Hour Ozone Reasonable Further Progress State Implementation Plan

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1994 State Strategy for the California SIP

California Clean Fuels for Fleets Certification for the 70 ppb Ozone Standard

2021 South Coast PM2.5 Redesignation Request and Maintenance Plan

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2022 State Strategy for the State Implementation Plan (2022 State SIP Strategy)

2021 Coso Junction PM10 Planning Area Second 10-Year Maintenance Plan

2021 Sacramento County Second 10-Year PM10 Maintenance Plan

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Revised Draft 2020 Mobile Source Strategy - Comments Received

2021 South Coast PM10 Maintenance Plan

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Workshop Discussion Draft 2020 Mobile Source Strategy - Comments Received

2020 South Coast PM2.5 SIP Revision

2020 Coachella Valley Extreme 8-Hour Ozone Plan

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California's Parking Cash-Out Law

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Indian Wells Valley Second 10-Year PM10 Maintenance Plan

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2017 Baseline Inventory and Vehicle Miles Traveled Offset Demonstration for the 2015 70 ppb 8-hour Ozone Standard

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2003 South Coast 1-Hour Ozone and PM10 Plan

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2005 South Coast Carbon Monoxide Plan

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2010 Coachella Valley PM10 Redesignation Request and Maintenance Plan

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2010 South Coast Air Basin PM10 Redesignation Request, Maintenance Plan, and Conformity Budgets

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2011 Progress Report on Implementation of PM2.5 State Implementation Plans (SIP) for the South Coast and San Joaquin Vally Air Basins and Proposed SIP Revision

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2011 8-Hour Ozone State Implementation Plans Revisions and Technical Revisions to the PM2.5 State Implementation Plan Transportation Conformity Budgets for the South Coast and San Joaquin Valley Air Basins

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2012 Lead State Implementation Plan for Los Angeles County

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2012 South Coast Ozone and PM2.5 Implementation Plan

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2015 Minor Revision to the South Coast 2012 PM2.5 SIP

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2016 South Coast AQMP Reasonably Available Control Technology SIP Demonstration

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2016 Ozone and PM2.5 Plan for the South Coast Air Basin and Coachella Valley

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2018 South Coast SIP Revisions and Updates