Smoke from wildfires in Canada has drifted into the U.S., prompting air quality alerts for Americans as it continues to spread. But when officials and forecasters classify a city's air as "unhealthy" ...

NEW YORK (WABC) -- The Air Quality Index is a scale used for daily reporting of how clean or polluted the air is, and what health effects might be of concern. The AQI focuses on what you might ...

PHILADELPHIA (CBS) -- Air Quality Index (AQI) refers to the Environmental Protection Agency's scale regarding the health impact of air quality and pollution in the U.S., regulated under the Clear Air ...

The New York State Department of Environmental Conservation’s air-quality health advisory in response to wildfire smoke wafting down from Canada is based on the Air Quality Index, or AQI. The AQI was ...

Wildfires in Canada are sending heavy smoke across the northern U.S., and New Jersey is experiencing some of the worst air pollution it's ever seen. As of 5 a.m., alerts had been issued for almost the ...

This article explains how pregnant women and elderly adults should respond to different levels of the Air Quality Index (AQI) ...

STATEN ISLAND, N.Y. — New York City’s Air Quality Index (AQI) hit unprecedented levels Wednesday after a thick plume of Canadian wildfire smoke shrouded the five boroughs in a dense haze. Forecasters ...