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Vehicle owners in those counties must have their vehicle emission controls inspected and use a low-pollution mixed gasoline. But when the limit is lowered to 60 ppb, Coconino and eight other Arizona counties join the original three in violation.

A: All residents of the greater Phoenix and Tucson areas and those who regularly commute into the areas for work or school are required to have their 1967 or newer vehicles pass an emissions test. Most vehicles newer than 6 years old are exempt from testing, and certain other vehicle exemptions apply (see Exemptions).

A: All residents of the greater Phoenix and Tucson areas and those who regularly commute into the areas for work or school are required to have their 1967 or newer vehicles pass an emissions test. Most vehicles newer than 6 years old are exempt from testing, and certain other vehicle exemptions apply (see Exemptions).

Emission testing is required for vehicles registered within designated emission control areas.

Vehicle owners can apply at azdeq.gov/65waiver or by calling 602-771-3950 and pressing 0 to reach Customer Service. In addition, Vehicle Emissions Inspection (VEI) testing stations are taking additional precautions at their facilities to protect public health.

A: All residents of the greater Phoenix and Tucson areas and those who regularly commute into the areas for work or school are required to have their 1967 or newer vehicles pass an emissions test. Most vehicles newer than 6 years old are exempt from testing, and certain other vehicle exemptions apply (see Exemptions).

It's a two-department effort, as emissions standards are determined by the Arizona Department of Environmental Quality. These are nonattainment areas for emissions related pollutants and include parts of Maricopa, Pinal and Pima Counties, Erin Jordan, spokesperson for ADEQ.

If your vehicle is in an area of a state (other than Arizona) that does not require emissions testing, you can apply for an out-of-state exemption. You can now apply and pay using our online portal | Apply Now >

At the time of an emissions test failure, a vehicle owner will be provided with the code(s) contributing to that failure. If a vehicle fails the retest for the original failure code(s), the repair work is guaranteed by the facility that serviced the vehicle.

If your vehicle is in an area of a state (other than Arizona) that does not require emissions testing, you can apply for an out-of-state exemption. You can now apply and pay using our online portal | Apply Now >

The vehicle must have failed the emissions test a minimum of two times during the test cycle. The vehicle's malfunction must be diagnosed, and a low emissions tune-up must be performed after the initial failure.

The model year is within the past 5 model years. ... A vehicle is registered outside of an Arizona vehicle control area. ... Vehicles with model years older than 1966. Motorcycles. Electric Vehicles. Golf carts and small electrically operated carts.