Approved Air State Implementation Plans (SIPs)

This site contains information about air quality regulations called State Implementation PlansHelpState Implementation PlansEPA approved state plans for the establishment, regulation, and enforcement of air pollution standards. that have been approved by EPA, as well as Federal Implementation Plans (FIPs) and Tribal Implementation Plans (TIPs)


Find an approved SIP/FIP/TIP

SIP Requirements
in the Clean Air Act

SIP Approval Actions
in the Federal Register

About SIPs