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.

With wildfire smoke in the forecast, track the drop in air quality across dozens of PurpleAir sensors with our live, updating ...

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 (AQI) is a national system developed by the U.S. Environmental Protection Agency (EPA) to translate various air pollutant concentrations into a single, easy-to-understand number.

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 ...

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

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.