Millions of people in California have been urged to avoid grilling on Wednesday amid concerns over high air pollution levels.

There are actually two AQIs for air quality, one for particulate matter and one for ozone, but when you see just one AQI, you ...

The Southwest Ohio Air Quality Agency reports that "levels of ozone within the region may approach or exceed unhealthy ...

Central Arkansas has been placed under an Ozone Action Advisory, which is now classified as "Code Orange".Determined color ...

“Air quality levels in outdoor air are predicted to be greater than an Air Quality Index value of 100 for the pollutant of ...

The Department of Natural Resources and Environmental Control warns of air that is unsafe for sensitive groups on July 5.

An air quality alert was issued Thursday by the National Weather Service for the entire Chicago area through Friday night.

The alert will remain go into effect starting at midnight on Saturday, June 21, through Monday, June 23, for counties in Ohio, Indiana and Kentucky.