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 AQI is measured on a scale from 0 to 500, with the lower the number, the healthier the air. (Getty Creative) ...

Indicators like the Air Quality Index (AQI), commonly used to track air pollution levels ... But air quality can vary on a hyperlocal scale, meaning the network of official sites is "fairly sparse," ...

The Air Quality Index, set by the Environmental Protection Agency, is your guide to how bad the air quality is outdoors. The data that goes into the Air Quality Index comes from 5,000 air monitors ...

For people living near wildfires in the Los Angeles area, understanding the air quality index (AQI) charts can help you determine if you can safely workout, while outside. The AQI scale ranges ...

as judged by the EPA's Air Quality Index rating system. Moderate air quality is between 51 and 100, or in the yellow band of the AQI scale. Air quality in the moderate range can still be risky for ...

Calculating air pollution from wildfires and other events has become more complicated. That doesn’t mean it’s necessarily more accurate.

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 ...