The Chicago area recorded ozone levels of 156 late Monday afternoon. Levels above 100 are considered unhealthy. Residents ...

Smoke from wildfires in Manitoba, a Western province facing its worst fire season in 30 years, has created hazardous air ...

Residents in lower-income areas, often near highways and industrial sites, still breathe some of the dirtiest air in the ...

The advisory was extended on Friday afternoon, with officials warning that air quality could be affected through Saturday.

When air quality is ranked "unhealthy for vulnerable groups" it means PM 2.5 are at levels that can cause problems for people ...

Smoke travels hundreds of miles to harm air quality far from the fire, according to the EPA’s Wildfire Smoke and Your Patient ...

With smoke drifting over the Sacramento region from wildfires in the north state, air quality officials are urging capital ...

Unhealthy air has invaded Minnesota, Wisconsin and North Dakota early this week as a new round of wildfire smoke from Canada ...

A study in Ontario found continued exposure to fine particulate matter is linked to higher levels of diffuse myocardial ...

The Illinois Environmental Protection Agency has issued an Air Pollution Action Day for Tuesday, July 15. Here's what to know ...

Many communities in Arizona, Michigan, Illinois, New York and across North America are experiencing poor air quality due to ...