Air quality alerts are in effect across several regions in South Carolina, North Carolina and California because of elevated ...

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 ...

The Air Quality Index (AQI) is an index for reporting daily air quality. It tells you how clean or polluted your air is, and what associated health effects might be a concern for you. For more ...

Air quality changes consistently. Depending on the different pollutants in the air that come from natural and human activity, ...

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 ...