California State Implementation Plans
As the first to regulate motor vehicle emissions, require catalytic converters on cars and unleaded gasoline, California has continuously been at the forefront of air pollution control. Over the last 50 years, these and many other efforts originating here in our state have been duplicated by other states and around the world. CARB is currently tasked with key mandates such as achieving health‑based air quality standards for ozone, particulate matter and other air pollutants under the State and federal Clean Air Acts. CARB’s current programs, coupled with efforts at the local and federal level, have achieved tremendous success in reducing emissions. Emission reductions translate into tangible air quality improvements as the real-world proof of the effectiveness of California’s air pollution control programs.