EPA Region 4 is the agency responsible for the state implementation plan (SIP) development (including mobile sources related issues), designation activities for the national ambient air quality standards (NAAQS), transportation conformity activity, regional haze and general air quality planning for the States of Alabama, Florida, Georgia, Kentucky, Mississippi, North Carolina, South Carolina, and Tennessee.
Links of Interest:
- EPA Approved Statutes and Regulations in the North Carolina SIP
- Approved Air Quality Implementation Plans in Region 4
- About SIPs
- Air Quality Implementation Plans
- Criteria Air Pollutants (NAAQS)
- Nonattainment Areas (Green Book)
North Carolina State Implementation Plan(SIP) Contact in the Southeastern US - Region 4: Nacosta Ward (404-562-9140)You may need a PDF reader to view some of the files on this page. See EPA’s About PDF page to learn more.
North Carolina SIP: Subchapter 2D - Air Pollution Control Requirements: Section 2D.400: Ambient Air Quality Standards (PDF)(9 pp, 74 K,
Purpose is to establish certain maximum limits on parameters of air quality considered desirable for the preservation and enhancement of the quality of NC air resources.