Data / Federal rules / 2025-17051

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

The Environmental Protection Agency published this proposed rule in the Federal Register on September 5, 2025. Comments closed on October 6, 2025.

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What the agency says

On September 26, 2023, the State of South Carolina, through the South Carolina Department of Environmental Services (SCDES, formerly the "South Carolina Department of Health and Environmental Control"), submitted a request for the 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 or standard) through 2036 for the South 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 South Carolina portion is hereinafter referred to as the "York County Area"). EPA is proposing to approve and incorporate this maintenance plan, including the 2018 and 2036 motor vehicle emission budgets (budgets) for nitrogen oxides (NOx) and volatile organic compounds (VOC) for the York County Area, into the SIP. EPA is also notifying the public of the status of EPA's adequacy determination for the budgets for the York County Area.

Key facts

Document number: 2025-17051
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: September 5, 2025
Comments due: October 6, 2025
Dates: Comments must be received on or before October 6, 2025.
Docket: EPA-R04-OAR-2024-0558; FRL-12961-01-R4
Code of Federal Regulations: 40 CFR 52
Pages: 8

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Published in September 2025

Read from the Federal Register API, last updated 2026-10-23. The document on federalregister.gov is the official record; dates and dockets can change through later corrections. Free to reuse with credit to SpecStream under CC BY 4.0.