Various popular weather apps across Chicago showed that the air was unsafe to breathe early Wednesday morning, prompting ...

Not everyone was reporting the dangerous air quality levels, though. The Environmental Protection Agency’s AirNow is a go-to ...

Despite improvements in air quality in past decades, 156 million Americans still breathe in too much soot or ozone, says the ...

A concerning air quality mystery has broken out, as the city was reportedly blanketed with toxic chemicals - although not ...

Chicago’s air quality worsened, ranking 15th for smog and 19th for particle pollution nationally, according to the American ...

The metro area ranked 15th overall for levels of smog, according to a new analysis from the American Lung Association.