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Air Quality Implementation Plans

This site contains information about air quality regulations for State Implementation Plans (SIPs), Federal Implementation Plans (FIPs), and Tribal Implementation Plans (TIPs).


Check Status of a SIP

Air Quality Map for the US
  • SIP status tools

Find Approved Plans

Map of US
  • Approved SIPs/FIPs/TIPs

Develop a SIP

Smog over a city
  • SIP checklists
  • Guidance and policies
  • Submit a SIP

Basic Information

Rubber stamps showing rules and regulations
  • Learn about SIPs, FIPs, and TIPs

Questions?

  • Find a regional contact for SIPs/FIPs/TIPs

Related Information

  • Air pollutants (NAAQS) 
  • Nonattainment areas ("Green Book")
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Last updated on April 12, 2021