Thursday: A slight chance of showers and thunderstorms after 2 p.m. Sunny, with a high near 94. Heat index values as high as ...

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 ...

What are the Air Quality Index levels? Governments around the world track and rank their air quality daily, in some cases in realtime, using a color-coded scale of "good" to "hazardous." ...

The DEC has issued an air quality health advisory for most of upstate New York due to elevated levels of fine particulate ...

AirNow and PurpleAir use the Air Quality Index, or A.Q.I., a measure of air quality from 0 to 500 that is composed of six categories, from “good” to “hazardous.” ...

The EPA breaks the Air Quality Index into a few categories with different recommendations. Green (0–50): The air is safe to breathe. Yellow (51–100): The air quality is considered moderate ...

The Air Quality Index (AQI) is used by various government agencies to report how clean or polluted the air is in your area. For example, you may have spotted this metric popping up in local ...

Milwaukee, Ozaukee, Racine, Kenosha and Sheboygan are all under a poor air quality alert from noon to 11 p.m., according to ...