California’s smog problem is one of the most pressing environmental issues facing the state. In an effort to reduce smog, the California Air Resources Board (CARB) has implemented a number of regulations over the years. One of the most significant of these is the California Smog Law, which was first enacted in 1970.
The California Smog Law has been amended several times over the years, and the most recent changes were made in 2025. These changes are designed to further reduce smog pollution in the state. The new law includes a number of provisions, including:
