Air pollution is widely recognized as a major threat to public health, and while air quality data is widely available, the ...

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 ...

The importance of air quality monitoring — whether you are cozy at home on a winter’s day or questioning the cause of a gorgeous sunrise in the backcountry — is gaining broader recognition. And with ...

The air quality index (AQI) is a unitless number that presents the concentration of a specific pollutant relative to an EPA-established outdoor air quality standard. AQI ranges are established to ...

A new study reveals that people may be exposed to unhealthy levels of airborne pollutants inside their homes, even if the outdoor air quality is good. Researchers at the University of Birmingham used ...

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 ...