PHILADELPHIA (WPVI) -- With smoke blowing into the Philadelphia region from the wildfires in Canada, you may have heard a lot about the Air Quality Index or AQI. But what it is, exactly? The Air ...

Add Yahoo as a preferred source to see more of our stories on Google. Knowing how to read the EPA's Air Quality Index can help you understand whether smoke from numerous Canadian wildfires makes it ...

Add Yahoo as a preferred source to see more of our stories on Google. The AQI is measured on a scale from 0 to 500, with the lower the number, the healthier the air. (Getty Creative) But many ...

NEW YORK (WABC) -- The Air Quality Index is a scale used for daily reporting of how clean or polluted the air is, and what health effects might be of concern. The AQI focuses on what you might ...

Over the past five years, as California wildfires increased in both intensity and scope, fall in the Bay Area has meant skies intermittently shrouded in smoke. This season, my morning routine has not ...

Air quality levels are expected to exceed an Air Quality Index value of 100 due to elevated ground-level ozone.

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.

After fires destroyed multiple neighborhoods across Los Angeles County, many residents looked up to find blue, smoke-free skies this week. The Air Quality Index (AQI) — which measures the ...