An Air Quality Alert has been issued for Koochiching County and the northern portion of St. Louis County, in effect until 1 am Friday.

The Minnesota Pollution Control Agency has issued an air quality alert for north central and northeast Minnesota. The alert takes effect at 10 a.m. on Thursday, July 17, and runs until 1 a.m. on Friday,

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 ...

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 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 ...

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.

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