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 map below displays the current air quality at monitoring sites in the U.S., Canada and Mexico. Air monitoring sites are color-coded based on the pollutant (ozone or particulate matter ...

Transylvania and Henderson counties are under a Code Purple air quality advisory on Friday, March 28. Buncombe, Swain and Polk counties also have Code Red unhealthy air. How to know if the ...

Greenville, Oconee, Spartanburg, and Pickens Counties are under a yellow air quality code, posing potential risks for sensitive groups. Anderson County remains under a green air quality code ...