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.

Over 1,000 locations in the United States monitor and record the air in a color-coded index for four significant pollutants: ground-level ozone, particulate matter, carbon monoxide and sulfur ...

The air quality alert will be in effect from midnight on Friday, July 4, to the end of Saturday, July 5, in Butler, Clermont, Hamilton and Warren counties in Ohio; Boone, Campbell and Kenton ...

Wildfire smoke coming in from Canada has overspread much of Michigan already today. It will create hazy skies, and has prompted an Air Quality Alert for much of the state. The alert will stretch ...

An air quality alert was in effect for the Chicago area and northwest Indiana Tuesday as poor air quality from unhealthy, elevated ozone and lingering wildfire smoke continues. According to the ...