2017 Chico, CA/Butte County PM2.5 Redesignation Request and Maintenance Plan Categorías Topics Air Quality Plans Programs California State Implementation Plans Tipo Information The California Air Resources Board (CARB) approved the Chico, CA/Butte County PM2.5 Redesignation Request and Maintenance Plan at a public hearing on November 16, 2017. This Plan was submitted to U.S. EPA as part of the State Implementation Plan. CARB DocumentsNotice of Public Hearing (10/13/2017)Staff Report (10/13/2017)District DocumentsDistrict Plan (9/26/2017)U.S. EPA Documents and ActionsFinal Rule: Chico Redesignation Request and Maintenance Plan for the 2006 24-hour PM2.5 Standard (83 FR 32064, eff. 8/10/2018)Proposed Rule: Chico Redesignation Request and Maintenance Plan for the 2006 24-hour PM2.5 Standard (5/9/2018)Final Rule: Determination of Attainment by the Attainment Date (82 FR 21711, eff. 6/9/2017) Related Resources 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
