The EPA's Air Quality Index can tell you whether breathing outside air can be harmful. Here's how to read the scale to plan accordingly in Michigan.

The EPA's Air Quality Index can tell you whether breathing outside air can hurt you. How to read the scale.

The U.S. Air Quality Index (AQI) is the Environmental Protection Agency’s tool for reporting outdoor air quality and health.

Canadian wildfire smoke is drifiting across Michigan. As of July 31, the entire state is under an advisory for unhealthy air.