California Air Resources Board

Recent and historical State Implementation Plan (SIP) activities for 8-hour ozone, PM2.5, PM10, and lead in the South Coast Air Basin and the Coachella Valley. 

• 2024 South Coast PM2.5 Plan
• 2022 Air Quality Management Plan for the 70 parts per billion 8-hour Ozone Standard in the South Coast Air Basin and Coachella Valley
• 2022 Coachella Valley 75 ppb 8-Hour Ozone Reasonable Further Progress SIP
• 2021 South Coast PM2.5 Redesignation Request and Maintenance Plan
• 2021 South Coast PM10 Maintenance Plan
• 2020 South Coast PM2.5 SIP Revision
• 2020 Coachella Valley Extreme 8-Hour Ozone Plan
• 2019 South Coast 8-Hour Ozone SIP Update
• 2019 South Coast PM_2.5 Contingency Measure
• 2018 South Coast SIP Revisions and Updates
• 2016 Ozone and PM_2.5 for the South Coast Air Basin and Coachella Valley
• 2016 South Coast AQMP Reasonably Available Control Technology SIP Demonstration
• 2015 Minor Revision to the South Coast 2012 PM_2.5 Plan
• 2014 Updates to the 1997 8-Hour Ozone Standard SIPs: Coachella Valley and Western Mojave Desert 8-Hour Ozone Nonattainment Areas
• 2012 South Coast Ozone and PM_2.5 Plans
• 2012 Lead SIP for Los Angeles County
• 2011 8-Hour Ozone and PM_2.5 Revisions
• 2011 PM_2.5 Progress Report
• 2010 South Coast Air Basin PM10 Maintenance Plan
• 2010 Coachella Valley PM10 Maintenance Plan 
• 2008 Ozone Early Progress Plans
• 2007 South Coast and Coachella Valley 8-Hour Ozone and PM_2.5 Plan
• 2005 Carbon Monoxide Plan
• 2003 1-Hour Ozone and PM10 Plan