An air quality alert was issued by the National Weather Service in Milwaukee-Sullivan at 1:52 p.m. on Wednesday, July 23.

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

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 ...

Canadian wildfire smoke no longer lingers in Michigan as of July 18. Southwest Michigan will experience unhealthy air for sensitive groups on July 21.

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 National Weather Service has issued both a heat and air quality alert for most of downstate New York, Wednesday, July 16.