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If you have additional questions about the Smoking Vehicle Program, please contact us:

The Maricopa County Air Quality Complaint Line at (602) 372-2703

If you have other concerns regarding vehicle testing; diesel vehicle testing; if a vehicle fails; recognized facilities; exemptions; fuel certificates; fleet vehicles; remote sensing; retrofit devices; or any other questions of this nature, contact:

The Arizona Department of Environmental Quality (ADEQ) at (602) 207-7000

For questions regarding vehicle title and registration issues or driver's licenses, contact:

The Arizona Department of Transportation’s Motor Vehicle Division This link opens a new page to a web site outside of Air Quality. at (602) 255-0072