Community Air-Quality Levels (CALs) are used to describe air quality in terms of how harmful the level of particulate
matter (PM) pollution in the air is to human health. The CALs are derived using similar methods as EPA’s Air Quality
You should use both IVAN Air Monitoring and government air data to understand the air quality levels around you.
When comparing health recommendations from both sources, you should follow the most health protective
*Sensitive groups include children, teens, older adults, pregnant women, and people with heart, lung, or other chronic diseases