It may appear slightly hazy in New Jersey on Friday as air quality levels ... or a "yellow" level on the air quality index, or AQI. The system is used by the Environmental Protection Agency ...

On the EPA’s air quality index, pollution numbers ranging from ... air pollution numbers to spread across a wide swath of New Jersey, from the northeastern region, through most of the central ...

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 ...