A Code Orange alert is in effect in the Philadelphia area, meaning the air is potentially unhealthy for sensitive groups.

Researchers determined how much outdoor particulate pollution affects indoor air quality. Their study concluded pollution from inversion and dust events is kept out of buildings, but wildfire smoke ...

EDT an air quality alert was reported by the National Weather Service in effect until Friday at noon EDT for Mason, Lake, ...

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

On Thursday at 9:30 a.m. an air quality alert was reported by the National Weather Service in effect until Friday at midnight ...

Concentrations of ground-level ozone will reach unhealthy levels for sensitive individuals in coastal Rockingham County, ...

An air quality alert was reported by the National Weather Service on Thursday at 9:41 a.m. EDT in effect until Friday at noon EDT for Cass, St. Joseph, Branch, Hillsdale and Berrien counties.

Residents in affected areas are advised to consider limiting strenuous outdoor physical activity to reduce the risk of ...

An air quality alert was reported by the National Weather Service on Thursday at 12:06 a.m. in effect until 11 p.m. for Essex ...

Massive clouds of pollutants could collide in North Carolina this week and result in poor air quality conditions for millions. Smoke from more than 100 wildfires burning in Canada has drifted into the ...

An air quality alert was reported by the National Weather Service on Thursday at 9:30 a.m. in effect until Friday at midnight ...