PM2.5 pollution is spiking in many counties in Utah and is accompanied by the typical summer pollutant of ozone. It makes for a nasty mix of pollution.

Thousands of people across one state were told to go inside if they start experiencing respiratory symptoms such as coughing.

Air quality in the Chicago area has remained poor for three days in a row, the NBC 5 Storm Team reported Wednesday morning.

Impacted areas include Ulster, Dutchess, Orange, Putnam, Sullivan, Rockland, Westchester, Suffolk, and Nassau Counties, as well as New York City.

An air quality alert was issued by the National Weather Service in Milwaukee-Sullivan at 9:26 a.m. on Wednesday, July 16.

Detroit faces significant air pollution. Planet Detroit's guide details common pollutants and protective measures.

The National Weather Service has issued both a heat and air quality alert for most of downstate New York, Wednesday, July 16.

Canadian wildfire smoke remains in Michigan. On July 16, officials issued an air quality advisory for western counties.

Millions of Americans across nine states were urged to avoid driving and limit outdoor activities on Wednesday as air quality ...

Sensitive groups are advised to stay indoors and limit outdoor activities as pollution and ozone levels spike to unhealthy ...

An air quality health advisory for the Mid-Hudson region will be in effect Wednesday, July 16, for Ulster and Dutchess counties, according to the state Department of Environmental ...

The Indiana Department of Environmental Management said Northwest Indiana’s ozone levels are expected to be unhealthy for ...