Data / Federal rules / 2025-15557

Air Plan Approval; North Carolina; Removal of Emissions Exemptions

The Environmental Protection Agency published this proposed rule in the Federal Register on August 15, 2025. Comments closed on September 15, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is proposing to approve separate but related State Implementation Plan (SIP) revisions submitted by the North Carolina Division of Air Quality (NCDAQ). First, EPA is proposing to approve a SIP revision submitted by NCDAQ on behalf of the State of North Carolina on October 27, 2023, to remove certain exemptions available at the discretion of a State official for emissions exceeding otherwise applicable SIP emission limitations. Second, EPA is proposing to approve a SIP revision submitted by NCDAQ on behalf of Mecklenburg County Air Quality (MCAQ or Mecklenburg County) on October 25, 2023, to remove a parallel local exemption analogous to the State's for emissions exceeding otherwise applicable SIP emission limitations. In addition, EPA is proposing to approve minor and administrative changes to certain regulatory provisions that have been revised by the State and Mecklenburg County since EPA's last approval of those provisions. EPA is proposing to approve these SIP revisions pursuant to the Clean Air Act (CAA or Act).

Key facts

Document number: 2025-15557
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: August 15, 2025
Comments due: September 15, 2025
Dates: Comments must be received on or before September 15, 2025.
Docket: EPA-R04-OAR-2024-0401; FRL-12885-01-R4
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Carbon monoxide; Environmental protection; Incorporation by reference; Intergovernmental relations; Lead; Nitrogen dioxide; Ozone; Particulate matter; Reporting and recordkeeping requirements; Sulfur oxides; Volatile organic compounds
Pages: 6

The document on federalregister.gov PDF

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Everything from the Environmental Protection Agency · Rules on air pollution control · Rules on carbon monoxide · Rules on environmental protection · Published in August 2025

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