Canadian wildfire smoke is affecting air quality in parts of Michigan. The EPA's air quality index (AQI) uses a color-coded scale to inform the public about air quality and associated health risks.

Knowing how to read the EPA's Air Quality Index can help you understand whether smoke from numerous Canadian wildfires makes it hazardous to breathe outside air. "The AQI is an index for reporting ...

Canadian wildfire smoke has triggered an air quality advisory for the entire state of Michigan. Air quality is currently unhealthy to very unhealthy across much of the state, posing risks for all ...

The U.S. Air Quality Index (AQI) is the Environmental Protection Agency’s tool for reporting outdoor air quality and health. The AQI includes six color-coded categories, each corresponding to a range ...

Smoke from Canadian wildfires is causing air quality concerns and hazy skies for many Americans in the Midwest and Northeast for another day this week. A map of the current Air Quality Index, the ...

Canadian wildfires may be posing “serious health risks’’ to people in New York — prompting an air-quality alert for the state through Monday and a warning for some regions into Tuesday. The metro area ...