Following are data resources for mobile source pollution.

• Air Emissions Inventories
  Provides resources for emissions data, regulations, tools, and guidance.
• Air Toxics Monitoring Program
  The goal of the air toxics monitoring program is to support reduction of public exposure to hazardous air pollutants (HAPs).
• Community Scale Air Toxics Ambient Monitoring (CSATAM) Projects
  These projects are designed to assist state, local and tribal communities in identifying and profiling air toxics sources, characterizing the degree and extent of local air toxics problems, and tracking progress of air toxics reduction activities.
• National Air Toxics Trends Stations (NATTS)
  NATTS was developed to provide long-term monitoring data for HAPs with consistent quality.