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.

An air quality alert has been issued by DC Homeland Security & Emergency Management for the District Saturday. The alert was originally issued as a Code Orange, which means the air is unhealthy ...

With smoke from Canadian wildfires expected to continue affecting affect Michigan this summer, knowing how to check the air quality before heading outside for physically demanding work or ...

Many studies have shown how reduced air quality can compare to smoking cigarettes. Moderate air quality currently is like smoking one cigarette per day.

Air quality alerts: Recommendations from the weather service When an air quality alert pops up on the radar, deciphering its implications is crucial.

An air quality alert has been issued for particle pollution in all New Hampshire counties.

The EPA's Air Quality Index can tell you whether breathing outside air can hurt you. How to read the scale.

Chicago's unhealthy air quality will continue into the weekend, experts say Smoke coming in from Canadian wildfires settled over Chicago, causing unhealthy air quality conditions for at-risk groups.

An air quality map shows conditions improving in the U.S. on Friday as smoke from the Canadian wildfires subsides.

Air quality alert remains in effect for entire Chicago area. When will it improve? According to the NBC 5 Storm Team, the worst air quality in the country Friday was recorded in Ann Arbor, Michigan ...

The New York State Department of Environmental Conservation has issued an Air Quality Health Advisory for fine particulate matter. What to know.