Most of the world's population is exposed to polluted air and or those living in cities with chronically bad air, the smog ...

But air quality can vary on a hyperlocal scale, meaning the network of official sites is "fairly sparse," says Michael Jerrett, an air pollution expert at the University of California, Los Angeles.

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

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 ...

Real estate and climate change now go hand-in-hand. As temperatures and sea levels continue to rise, many homes face some ...

This measurement shows what the current nearby air quality is like. However, reading and interpreting AQI is a bit of a guessing game. The AQI scale ranges from 0 to 500 and includes different ...

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

Air quality, measured on a scale from good to hazardous, was good to moderate on Monday and mostly good across Los Angeles County on Tuesday, according to data from the South Coast Air Quality ...

Air quality in wildfire-stricken Los Angeles improved on Thursday from hazardous peaks hit earlier this month, as tiny soot particles that can penetrate the lungs and brain dropped to moderate levels, ...

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 people who are unusually sensitive to air pollution.