New York State, including the five boroughs and Long Island, was put under a heat advisory and air quality alert on Wednesday. The advisory issued by the National ...

Columbus' air quality is yet again expected to dip into "unhealthy for sensitive groups" levels on June 12.

Many studies have shown how reduced air quality can compare to smoking cigarettes. Moderate air quality currently is like smoking one cigarette per day.

According to officials, the air quality levels in the outdoor air are predicted to be greater than an Air Quality Index (AQI) value of 100 for Fine Particulates.

The EPA's Air Quality Index can tell you whether breathing outside air can hurt you. How to read the scale.

An air quality alert remained in effect for the entire Chicago area Friday, with another "Air Pollution Action Day" alert declared as wildfire smoke from Canadian wildfires continues to impact ...

A Chicago Air Quality Alert has been extended through Friday as smoke from Canada wildfires has pushed the AQI into unhealthy levels across the region.

What is the air quality index? The air quality index, or AQI, is a standardized rating system that assesses the severity of air pollution on a scale ranging from 0 to 500.

The air quality index, or AQI, is a standardized rating system that assesses the severity of air pollution on a scale ranging from 0 to 500. The higher the number, the worse the quality.

As Canadian wildfires burn, Greater Lansing is seeing smoke, haze. On June 5, most of the Lower Peninsula is under an air quality advisory or alert.

The U.S. Air Quality Index (AQI) is the Environmental Protection Agency’s tool for reporting outdoor air quality and health.