Good afternoon, Chicago. Readings from several popular weather apps had people across the Chicago area spending much of yesterday wondering whether their air was safe to breathe — until the ...

As the New Jersey wildfire rages on, the air quality across the tri-state area is worsening. The air quality index for the ...

A New Jersey wildfire Thursday prompted a New York City air quality alert until midnight covering Manhattan, the Bronx, ...

State of the Air grades are based on the number of days a county’s air reaches unhealthful levels on the Air Quality Index.

The New York State Department of Health recommends individuals consider limiting strenuous outdoor activity while pollution ...

Chicago's skyline has been shrouded in mystery as conflicting reports of toxic air chemicals swirl, leaving residents ...

President Donald Trump announced he will be sitting for an interview with Jeffrey Goldberg, the editor-in-chief of The Atlantic who was erroneously included in a group chat about military strikes in ...

Montrose Environmental Group (NYSE: MEG) is on a mission to help protect the air we breathe, the water we drink, and the soil that feeds us to enhance environmental stewardship while supporting ...

With seemingly near-daily revelations about U.S. Secretary of Defense Pete Hegseth’s alleged—and potentially unlawful—leaks ...

Slideshows ...

Air quality index is used by government agencies to communicate to the public how polluted the air is. Public health risks increase as the AQI rises. Eight pollutants namely particulate matter PM10, ...

Air quality index is used by government agencies to communicate to the public how polluted the air is. Public health risks increase as the AQI rises. Eight pollutants namely particulate matter PM10, ...