Wildfires in Canadian provinces of Manitoba and Saskatchewan are creating smoke visible in Michigan. How to use the air ...

uses the air-quality index, or AQI. The scale spans from numbers 0 to 500. A higher AQI value signifies a higher level of air pollution and a greater health risk. On June 7, AQI values of over 400 ...

when smoke from fireworks reduces air quality. The two main incursions of smoke in the Eastern United States during June broke numerous records on the AQI scale: The first major smoke outbreak of ...

If the index score goes above 301 — maroon on the chart — the air is considered ... tends to trap pollutants in the air. In addition to the air quality scale, scientists look at particulate ...

Wildfire smoke has led many to start poring over charts and numbers ... The U.S. uses a different scale of measurement, with a much higher range. The Air Quality Index (AQI) is based on air ...

The color-coded scale stretches from 0 to 500 and is split across six categories, from good to hazardous. If your local air quality is green or yellow (100 or below), it means there’s little ...

The Environmental Protection Agency monitors how polluted or clear the air is with the Air Quality Index, or AQI. The scale runs from ... See the chart below for the full range of the AQI.

What is the Air Quality Index? The AQI chart is a scale from 1 to 500 used to classify air quality levels using a formula and information of common pollutants in the air. A number is calculated ...

Ottawa's air quality was so bad that it cracked through the top of a risk scale on Tuesday morning ... in some ways, off the charts," said Vaswani. Don't expect a return to normal anytime ...