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 ...

while "unhealthy" air was detected in Washington state. The Air Quality Index measured 156 near Forks, Washington, and received a rating of "unhealthy," meaning some members of the general public may ...

The data that goes into the Air Quality Index comes from 5,000 air monitors across the country, including local, state, tribal, and federal reporting. There are actually two AQIs for air quality ...

No matter what causes air pollution, it continues to increase throughout the United States, with over 131 million people ...

Angelenos still bothered by the smell of smoke may be surprised to see that Air Quality Index numbers returned to “healthy” or “moderate” levels this week in L.A. County, but they shouldn ...

Naturally, people in the Los Angeles area are reaching for their phones to see what the Air Quality Index (AQI ... particularly in western states like California. But human-caused climate change ...

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 ...