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 Kentucky SIP
• Approved Air Quality Implementation Plans in Region 4
• About SIPs
• Air Quality Implementation Plans 
• Criteria Air Pollutants (NAAQS)  
• Nonattainment Areas (Green Book)

Kentucky State Implementation Plan(SIP) Contact in the Southeastern US - Region 4: Ashten Bailey (404-562-9164)

• 401 KAR Chapter 63 - General Standards of Performance (PDF)(23 pp, 115 K, 10/01/17)
  General Standards of Performance Provisions of the Kentucky Air Pollution Control Regulations as of 10/01/17 - 401 KAR Chapter 63