Indicators like the Air Quality Index (AQI), commonly used to track air pollution levels, provide a rough sense of the pollution floating in the skies. But those types of indicators don't capture ...

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 ...

Here’s how to decode the Air Quality Index. What is the Air Quality Index? The term “code red” comes from the U.S. Environmental Protection Agency’s color-coded Air Quality Index (AQI ...

Easton, PA-NJ metropolitan area was named the 50th most polluted in the nation for daily particle pollution, receiving an ‘F’ grade, according to the American ...

Apple’s weather app, too, showed that the Air Quality Index had climbed into the 400s, a reading so hazardous that people are encouraged to stay indoors. (The Air Quality Index, which ranges ...