The red-level air quality index (AQI) category—covering values from 151 to 200—means the air is unhealthy for everyone, not ...

Minnesota officials issued an air quality control warning through mid-day Monday as smoke from Canadian wild fires moves to ...

This measure, based on data from the Environmental Protection Agency, evaluates states on the number of days the Air Quality Index in counties was not rated “good.” U.S. News calculated a ...

Air quality is measured by the Air Quality Index, or AQI. The index was created by the Environmental Protection Agency in ...

It is possible for those in sensitive groups to experience moderate symptoms from long-term exposure. Air quality is measured by the Air Quality Index, or AQI. The index was created by the ...