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 ...

Air quality in the Chicago area remains poor for the third straight day in a row, with an air quality alert in effect through Wednesday night, along with extremely muggy conditions and the chance for ...

An Air Quality Health Advisory has been issued for New York City for Wednesday, July 16. The Air Quality Index is anticipated to reach between 101 and 150 because of ...

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.