It comprises two measures: the number of days with an air quality index below a certain threshold and the number of violation points against drinking water systems in each state. Learn more about ...

Thursday morning, air quality in the Treasure Valley was hazardous, which is the highest category on the Air Quality Index ... throughout the day. Toole explained the conditions set the stage ...

Bad air quality days are a heightened concern as ozone season begins in North Carolina. Ozone season in the state lasts from ...

The EPA measures regional air quality index (AQI) by how hazardous it is to the general public. Discover the AQI in your city by searching below.

An analysis of the air quality report of the 14 days of March till Friday showed that the average air quality of the city was ...

As seasonal allergies begin to show up, a new report finds that the overall air quality throughout central Ohio decreased ...

Here’s the latest air quality report and weather forecast for the Myrtle Beach area after a weekend of intense wildfires.

The air quality in the border region reached alarming levels yesterday, with conditions described as the worst in years, ...

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 ...

and forecast models to provide real-time air quality index (AQI) readings for more than 1,000 locations. Los Angeles’ air quality is closely tied to weather patterns. Clear, breezy days help ...