Wisconsin, Minnesota and Indiana all have air quality alerts, while Chicago's air quality currently ranks in the "unhealthy for sensitive groups" category.

Thursday, Detroit had the worst air quality in the world, according to AQI rankings and Friday was remained in the red or "unhealthy" category. There are nearly 500 active wildfires in Canada, ...

Millions of Americans across many US cities are again suffering through poor air quality caused by record-setting Canadian wildfires.

PORTLAND, Ore. — The air quality in Portland and surrounding areas, which was among the worst in the world for several days this week, finally returned to healthy levels Thursday night. On ...

Denver bolted Saturday afternoon to the top of a foul list, No. 1 in air pollution among major cities of the world.. The city took first place with an air quality index ranking of 162, edging out ...

The air quality in NYC hit a score of 198 on the air quality index (AQI) on June 7, according to the rankings of Swiss air quality tech firm IQAir, due to the high levels of particulate matter in ...

Detroit moved from the No. 3 ranking to No. 7 for the worst air quality in the world around 7 a.m. Friday. IQAir’s live air quality index ranking showed that Toronto, ...

The lower the score in the ranking, the lower the air quality. Riverside-San Bernardino-Ontario, California: 17.03; Houston-The Woodlands-Sugar Land, Texas: 28.36; Albuquerque, New Mexico: 29.64; ...

A ccording to the latest Air Quality Index (AQI) rankings from IQAir, Karachi and Lahore are listed among the most polluted cities in the world, based on data from a prominent global air quality ...