Air Quality

The ADOT Air Quality Group works to enhance air quality through congestion mitigation, air quality programs and National Environmental Policy Act (NEPA) planning activities to implement provisions required in the Clean Air Act to meet National Ambient Air Quality Standards throughout Arizona.

Statewide Air Quality Nonattainment and Maintenance Areas by Mileposts

Air Quality Updates

  • EPA: Information on Regulatory Actions on Air Quality Standards
  • FHWA: Information on Regulatory Actions on Transportation Conformity
  • EPA Region 9: Information on State of Arizona Implementation Plan Actions

Air Quality: Agency Contacts


Projects for Improving Air Quality