The Illinois EPA declared an Air Pollution Action Day in the Chicago metro area. See today's air quality index forecast for Illinois.

The Air Quality Index (AQI) is a national system developed by the U.S. Environmental Protection Agency (EPA) to translate various air pollutant concentrations into a single, easy-to-understand number.

An Air Quality Alert has been issued for parts of northern New York and Vermont today because of Canadian wildfire smoke.

With wildfire smoke in the forecast, track the drop in air quality across dozens of PurpleAir sensors with our live, updating ...

Canadian wildfire smoke lingers in Michigan. Officials issued an air quality advisory in southeast Michigan for July 15.

Wildfire season is upon us, and smoke is reducing air quality through swaths of the country. Environment Canada suggests ...

DETROIT (FOX 2) - An Air Quality Alert is in effect once again today with one major difference. Yesterday's poor air quality was due to smoke from the Canadian wildfires. Today, that's more prevalent ...

The alert comes as humidity is expected to increase Tuesday, with high temperatures in the mid 80s to low 90s, with heat indices reaching 100 by Wednesday.

The DEC has issued an air quality health advisory for most of upstate New York due to elevated levels of fine particulate ...

Northern Minnesota and northern Wisconsin remain under an Air Quality Alert Monday due to wildfire smoke. Conditions are ...

Air pollution levels over Redding and parts of Shasta County are close to hazardous levels at times, due to heavy Green Fire smoke and pollutants.

The Illinois Environmental Protection Agency has issued an Air Pollution Action Day for Tuesday, July 15. Here's what to know ...