County Public
Health Contacts
Find Us on Facebook

Follow IDPH on Twitter

Particulate matter (2.5)

Fine particles or droplets in the air that are less than 2.5 microns wide, or about 30 times smaller than human hair. Outside, they come primarily from motor vehicle exhausts, power plants, wild fires, manufacturing processes, and the reaction of gases in the atmosphere. Indoor sources include tobacco smoke, cooking, fireplaces, and candles.

Data and information for this site are still being developed and added.  We welcome your comments and feedback.

This effort is supported by funding from the U.S. Centers for Disease Control and Prevention Environmental Public Health Tracking Program, Cooperative Agreement Number 5U38EH000619-02. The contents of this Website are solely the responsibility of the authors and do not necessarily represent the official views of the Centers for Disease Control and Prevention.