The classifications are based on a federal measurement system called the Air Quality Index. The Air Quality Index is used nationwide to measure the severity of air pollution and categorize the ...

Columbus' air quality is once again expected to become unhealthy for sensitive groups on June 12 due to smoke and ozone ...

The Air Quality Index (AQI) uses a color-coded scale to inform the public about air pollution levels and potential health ...

Typically, during the summer months of June, July and August, when the wind goes northwest behind a front, the New York sky ...

With smoke from Canadian wildfires expected to continue affecting affect Michigan this summer, knowing how to check the air ...

The worst air in the country on the morning of June 14 was in New Castle County because of a wildfire in New Jersey. The air quality index in Wilmington as of 9:45 a.m. was 227, which is "very ...

New York state health officials have issued an Air Quality Health Advisory for NYC on Thursday due to the forecast presence ...

An air quality alert is in effect Thursday for NYC, Long Island, and part of New Jersey due to smoke from the Canadian ...

Health officials issued a ground-level ozone warning Thursday for the lower Hudson Valley, New York City and Long Island.

An air quality alert has been issued for much of the Chicago area Wednesday afternoon as Canadian wildfire smoke once again ...

Officials issue an air quality advisory for counties in southwest Michigan as Canadian wildfires burn. Here's what the air ...

The Air Quality Index (AQI) uses a color-coded scale to inform the public about air pollution levels and potential health risks. Michigan residents can check the AQI through various online ...