Data / Federal rules / 2025-14476

Air Plan Approval; South Carolina; Second Planning Period Regional Haze Plan

The Environmental Protection Agency published this proposed rule in the Federal Register on July 31, 2025. Comments closed on September 29, 2025.

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What the agency says

The Environmental Protection Agency (EPA) is proposing to approve a regional haze State Implementation Plan (SIP) revision submitted by the South Carolina Department of Health and Environmental Control (DHEC) dated March 3, 2022, as satisfying the applicable requirements under the Clean Air Act (CAA or Act) and EPA's Regional Haze Rule (RHR) for the program's second planning period. South Carolina's SIP submission addresses the requirement that states must periodically revise their long-term strategies for making reasonable progress toward the national goal of preventing any future, and remedying any existing, anthropogenic impairment of visibility, including regional haze, in mandatory Class I Federal areas. The SIP submission also addresses other applicable requirements for the second planning period of the regional haze program. EPA is proposing this action pursuant to sections 110 and 169A of the Act.

Key facts

Document number: 2025-14476
Type: Proposed rule
Action: Proposed rule
Agency: Environmental Protection Agency
Published: July 31, 2025
Comments due: September 29, 2025
Dates: Written comments must be received on or before September 29, 2025.
Docket: EPA-R04-OAR-2022-0367; FRL-10406-01-R4
Code of Federal Regulations: 40 CFR 52
Topics: Air pollution control; Carbon monoxide; Environmental protection; Incorporation by reference; Intergovernmental relations; Nitrogen dioxide; Particulate matter; Reporting and recordkeeping requirements; Sulfur oxides; Volatile organic compounds
Pages: 19

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 July 2025

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