Proposed rule · 2026-22055

Air Plan Approval; California; Reasonable Further Progress Plan for the Coachella Valley Ozone Nonattainment Area

The U.S. Environmental Protection Agency (EPA or "the Agency") is proposing to approve a state implementation plan (SIP) revision from the State of California to meet the Clean Air Act (CAA) "Extreme" nonattainment area requirements for the Riverside County (Coachella Valley), California ozone nonattainment area ("Coachella Valley") for the 2008 8-hour ozone national ambient air quality standards (NAAQS or "standards"). Specifically, the Agency is proposing to approve the reasonable further progress (RFP) demonstration and associated emissions inventory and motor vehicle emissions budgets ("budgets") for the Coachella Valley.