Emissions testing is set to begin on November 1, 2026, following repeated instances of ozone nonattainment as determined by the EPA. This move is aimed at addressing the issue of smog formation, which occurs when certain pollutants react with heat and sunlight.

Faulty emission controls in cars can contribute to the problem by releasing excessive amounts of NOx and VOCs. Although cars do not directly emit ozone, these pollutants can combine to form smog. The new emissions testing is intended to help mitigate this issue.

Further information on the emissions testing program is available, providing details on the implementation and goals of the new initiative.