As smoke from Canadian wildfires has made its way into the U.S., it is important to understand how the air quality index works. Here's what each color code means.

In Louisiana, it’s illegal to publish results of personal air quality monitors without including ‘relevant uncertainties’ ...

Tuesday declared Code Orange Air Quality Action Day The DEP said the Eastern Canada Wildfires are likely contributing to the air pollution.

So it's also the color on the government chart showing the air quality index is more than 150, meaning unhealthy. When it's more than 200, it's purple - very unhealthy.

PITTSBURGH (KDKA) -- A Code Orange Air Quality Alert is once again in place for the Pittsburgh area due to smoke from the Canadian wildfires moving through Western Pennsylvania.

But what exactly is a code red alert—and what risk does all that air pollution pose to your health? Here’s how to decode the Air Quality Index. What is the Air Quality Index?

Expect another smoggy day in metro Detroit. The Southeast Michigan Council of Governments (SEMCOG) has declared its eighth ...

Air Quality Action Day alerts are issued when the air quality index is forecast to be orange or higher. The chart below provides more detail on the index values and the corresponding color codes.

WASHINGTON — The air quality is showing signs of improvement Saturday afternoon after starting with unhealthy air. As of noon, DC was still in code red, but surrounding areas are now in yellow or ...

The Pennsylvania Department of Environmental Protection (DEP) has declared a Code Orange Air Quality Action Day for fine particulate matter for Sunday, Oct. 23, 2022, in the Susquehanna Valley ...

The U.S. Environmental Protection Agency’s Air Quality Index uses color codes to forecast and report daily air quality. The orange zone represents an AQI of 101 to 150.

Millions of Americas affected by wildfire smoke are focusing on the colors red, purple and maroon on the Air Quality Index charts. Red used to be the scariest color. Why did that change?