The EPA's Air Quality Index can tell you whether breathing outside air can be harmful. Here's how to read the scale to plan ...

Topline. Here’s how to understand the Environmental Protection Agency’s Air quality index (AQI), which measures, on a 300-point scale (along with six categories and advisories), the quality of ...

As of Wednesday, more than 400 wildfires were burning across Canada, leading to air quality alerts − indicators the air is unsafe to breathe for certain people − across much of the eastern U.S.

As of Thursday morning, New York City and Washington, D.C. have the two worst air quality conditions in America, according to IQ Air’s live ranking of major world cities, which ranks the cities ...

The Air Quality Index (AQI) can help you understand if there’s poor air quality. Learn how to use it as a guide to stay safe. Photo: Getty Images/Eduardo Munoz Alvarez ...

What doesn't AQI tell us? The Air Quality Index does not take into account many gas or particle contaminants that are produced during wildfires, particularly when houses, cars and other man-made ...

The Air Quality Index is a scale used for daily reporting of how clean or polluted the air is, ... The higher the AQI value, the greater the level of air pollution and the greater the health concern.

The AQI numbers run from 0 to 500. Here’s the breakdown: 0-50: Good. The air quality poses no risk. 51-100: Moderate. The air quality is OK for most people, but a few who are especially ...

Air quality is measured with the U.S. Air Quality Index (AQI), and it's reported daily by the Environmental Protection Agency and other government agencies.

Feeling down? Here’s how air pollution could be messing with your brain and poor AQI be causing stress and depression.