Freeway north of LA is under an air quality alert which was reported by the National Weather Service on Thursday at 2:43 p.m.

The Southwest Ohio Air Quality Agency reports that "levels of ozone within the region may approach or exceed unhealthy standards." ...

On Saturday at 3:45 p.m. an air quality alert was reported by the National Weather Service in effect until Monday at midnight ...

EDT the National Weather Service reported an air quality alert in effect until Saturday at midnight EDT for Berrien County.

An air quality alert was issued Thursday by the National Weather Service for the entire Chicago area through Friday night.

EDT an air quality alert was reported by the National Weather Service in effect until Sunday at 12:15 a.m. EDT for St. Clair, ...