Wildfire smoke from Canada has made for bad air quality over parts of the Upper Midwest. Most of Minnesota had “unhealthy” ...

A series of live maps from Windy.com highlighted which parts of the U.S. were experiencing elevated levels of air pollution on Friday. The maps showed data for multiple types of pollutant, including ...

Smoke from wildfires burning in the northern Sacramento Valley may bring hazy skies and unhealthy air to parts of the Bay ...

Air quality is unhealthier-than-average for some people Thursday as winds are blowing wildfire smoke across the Northern ...

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

The current infrastructure also isn’t set up to fully account for the shifting behavior of wildfire smoke, which can travel ...

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

Recent wildfires in the Northstate, particularly the Green Fire burning in the Montgomery Creek mountainous area of Shasta ...

Indiana ranks worst in the U.S. for lung health due to high smoking rates and poor air quality, while Colorado and Hawaii ...

Analysis shows EPA rollbacks of the HON rule would put overburdened communities at risk and benefit chemical plants that ...

Poor air quality caused by ozone and other sources prompted the warnings across six states on Thursday and Friday.