The red-level air quality index (AQI) category—covering values from 151 to 200—means the air is unhealthy for everyone, not ...

Cities in California, Texas and Arizona are expecting air quality to become unhealthy for sensitive groups on Thursday.

The EPA measures regional air quality index (AQI) by how hazardous it is to the general public. Discover the AQI in your city by searching below.

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Wondering what the air quality is like in your neighborhood? This interactive map gives you up-to-the-minute air quality updates and health recommendations for communities across Los Angeles ...