Learn what the air quality index (AQI) means, how it impacts your health, and how to stay safe when pollution is high.

Recent data from the Environmental Protection Agency shows air quality in certain regions of the U.S. is deteriorating, ...

If you have been hearing about poor air quality in New York City Friday, you can breathe a deep sigh of relief (literally): ...

Experts say that even after fires are contained and extinguished, health risks from ash, smoke, and toxic materials, ...

Calculating air pollution from wildfires and other events has become more complicated. That doesn’t mean it’s necessarily ...

Those groups particularly sensitive to particulate matter in the air may want to limit time outside Friday and Saturday.

Air quality in wildfire-stricken Los Angeles improved on Thursday from hazardous peaks hit earlier this month, as tiny soot ...

A fire at the Owl Metals recycling facility that caused the Peninsula Expressway to shut down is still causing an air quality ...