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

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

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

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.

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

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 ...

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

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

An air quality health advisory for fine particulate matter was issued Tuesday for the Adirondacks and Central New York regions due to the impact of smoke from wildfires in Canada. It was issued by New ...

An air quality advisory that was set to last through Monday has been lifted, air district officials said. Over the weekend, ...