“Fine particles look to average in the mid to upper Moderate range due to Canadian wildfire smoke with the potential for some ...

Overall, the state’s air quality was good for 90% of the year last year. On the other end of the spectrum, states like California and Arizona had good air quality for only 67% and 68% of the ...

Concern for poor air quality in the greater Chicago area remains as the Illinois EPA extends its alert until Thursday night.