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 ...

that it is "reconsidering" more than 30 air pollution regulations in a series of moves that could impact air quality across the United States. "Reconsideration" is a term used to review or modify a ...

The quality of the air we breathe and the water we drink are critical aspects of leading a healthy, productive life. The air and water quality subcategory informs the best states for natural ...