3900 Air Resources Board
Program Descriptions


The Mobile Source Program works to improve air quality by reducing emissions from on- and off-road mobile sources as follows:
  • Enforce laws and develop, implement, and enforce regulations limiting criteria pollutants, greenhouse gases, and toxic air contaminants from new and in-use vehicles and other mobile sources and assess the effectiveness of established procedures.
  • Develop testing and evaluation procedures for vehicles, engines, emission control components, fuel additives, and test equipment to ensure emission standards are met.