The Air Quality Index (AQI) — which measures the concentration of pollutants in the air — seemed to confirm all was well in the L.A. atmosphere, with low numbers that suggested clean ...

In the springtime in Oklahoma, allergy season can be a primary cause of stuffy noses or difficulty breathing, but allergens like pollen and ragweed aren't counted on the Air Quality Index as those ...

Additionally, Buncombe, Swain and Polk counties will have a Code Red air quality alert today, according to the North Carolina ...

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 ...

Several WNC counties are under severe air quality alerts for Thursday, March 27, with one being issued a Code Purple.

In the springtime in Oklahoma, allergy season can be a primary cause of stuffy noses or difficulty breathing, but allergens like pollen and ragweed aren't counted on the Air Quality Index as those ...

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 ...

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 ...