The air quality index measures PM2.5, less than 2.5 microns particles, to determine the intensity of air pollution in cities.

By Elijah de Castro for Keen Sentinel. Broadcast version by Kathryn Carley for New Hampshire News Service, for the Solutions Journalism Network-Public News Service Collaboration. It's 11 in the ...

Learn what the air quality index (AQI) means, how it impacts your health, and how to stay safe when pollution is high.

Complimentary Site Survey by Camfil Canada To help businesses achieve better air quality, Camfil Canada offers complimentary ...

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 some ...

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

The agency runs calculations on the readings to determine the air quality index, or AQI, which can represent current conditions and averages over the next 24 hours. The AQI, which ranges from 0 to ...

In Santa Monica’s waterfront Palisades Park, the air was fresh enough for people to jog. Air quality, measured on a scale from good to hazardous, was good to moderate on Monday and mostly good ...

Wildfires are tearing through thousands of acres in Los Angeles County in California, as strong Santa Ana winds stoke the blazes.

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 ...

Photo by Jules Hotz for CalMatters. 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.