Proposed rule · 2026-19495

Air Plan Approval; North Carolina; Charlotte-Rock Hill Area Maintenance Plan for the 2008 8-Hour Ozone NAAQS

On February 28, 2025, the State of North Carolina, through the North Carolina Department of Environmental Quality, Division of Air Quality (NCDAQ), submitted a request for the U.S. Environmental Protection Agency (EPA) to approve a State Implementation Plan (SIP) revision containing the State's plan for maintaining the 2008 ozone National Ambient Air Quality Standard (NAAQS) through 2035 for the North Carolina portion of the bi-state Charlotte-Rock Hill, North Carolina-South Carolina 2008 8-hour ozone nonattainment area (the entire area is hereinafter referred to as the "bi-state Charlotte Area" and the North Carolina portion is hereinafter referred to as the "Charlotte Area"). The EPA is proposing to approve and incorporate North Carolina's second 10-year maintenance plan to maintain attainment of the 2008 8-hour ozone NAAQS in the bi-state Charlotte Area, including the 2018 and 2035 motor vehicle emission budgets (budgets) for nitrogen oxides (NO<INF>X</INF>) and volatile organic compounds (VOC) for the Charlotte Area, into the SIP. The EPA is also notifying the public of the status of the EPA's adequacy determination for the sub-area budgets for the Charlotte Area.