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

The EPA's Air Quality Index can tell you whether breathing outside air can be harmful. Here's how to read the scale to plan ...

Milwaukee, Ozaukee, Racine, Kenosha and Sheboygan are all under a poor air quality alert from noon to 11 p.m., according to ...

In Canada, the Air Quality Health Index (AQHI) is a scale developed to help people understand what the current air quality ...

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

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

An air quality alert was issued by the National Weather Service in Green Bay at 11:55 a.m. on Tuesday, July 15.

The Chicago area recorded ozone levels of 156 late Monday afternoon. Levels above 100 are considered unhealthy. Residents ...

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

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

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