Air Quality

• Air Quality Conformity Processes
  These federal regulations cover the legal consultation and methodology requirements on air quality conformity, and the criteria/procedures for violations.
  

• Flowchart for Air Quality Project-Level Conformity Determination
  This flowchart details the project level components that the EPG has to address when clearing every highway project. A must for all practitioners involved in air conformity work for ADOT.
  

• Arizona Non Attainment and Maintenance Areas
  

• Non-Attainment Area Particulate Matter (PM10) Maps
  These maps depict non-attainment areas for particulate matter (PM10) for the following communities:
  Ajo, Douglas, Hayden, Nogales, Paul-Spur, Phoenix, Rillito, and Yuma
• Non-Attainment Area Ozone Map
  This map depicts the non-attainment area for the eight-hour ozone for the Phoenix metropolitan area. It will assist practitioners in assessing air quality impacts during their environmental investigations.
• Maintenance Area Particulate Matter (PM10) Maps
  These maps depict maintenance areas for particulate matter (PM10) for Bullhead City and Payson. They will assist practitioners in assessing air quality impacts during their environmental investigations.
• Maintenance Area Carbon Monoxide (CO) Map
  This map depicts the maintenance area for carbon monoxide (CO) for the Tucson and Phoenix metropolitan areas. It will assist practitioners in assessing air quality impacts during their environmental investigations.
• Statewide Air Quality Maps - Nonattainment and Maintenance Areas
  These maps summarize the nonattainment and maintenance areas for carbon monoxide (CO), ozone, and particulate matter (PM10) for the entire state. These handy maps will be useful for practitioners in assessing air quality impacts during their environmental investigations.

• Project Exemption List
  This list consist of projects that are exempt from conformity to transportation plans and TIPs.
  

• Mobile Source Air Toxics Guidance
  This guidance helps the practitioner evaluate the mobile source air toxics on ADOT's highway improvement projects.
  

• FHWA's position on project level GHG analysis

• TRB Project-Level Analysis Template