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 ...

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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.

In recent days, the air quality index has been at "Unhealthy" levels in New York City from the Canadian wildfires smoke. People have been warned to avoid outdoor physical activities. Those who spend ...

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 again blanketing parts of the U.S. in a thick haze. Midwestern cities like Chicago, Minneapolis, Detroit and Milwaukee posted some of the worst air quality in the ...