The AQI is measured on a scale from 0 to 500, with the lower the number, the healthier the air. (Getty Creative) ...

The Air Quality Index, set by the Environmental Protection Agency, is your guide to how bad the air quality is outdoors. The data that goes into the Air Quality Index comes from 5,000 air monitors ...

This measure, based on data from the Environmental Protection Agency, evaluates states on the number of days the Air Quality Index in counties was not rated “good.” U.S. News calculated a ...

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Get all the news you need in your inbox each morning. According to nationwide Air Quality Index data maintained by USA TODAY, areas hit hardest include central LA county around Chinatown ...

Angelenos still bothered by the smell of smoke may be surprised to see that Air Quality Index numbers returned to “healthy” or “moderate” levels this week in L.A. County, but they shouldn ...

Share on Pinterest If you live in an area where you may be exposed to wildfire smoke, check your local Air Quality Index (AQI) before exercising outdoors. Jay L. Clendenin/Getty Images Wildfire ...

The map pulls data from air monitors, hundreds of pollution sensors, and forecast models to provide real-time air quality index (AQI) readings for more than 1,000 locations. Los Angeles’ air ...