The Pennsylvania Department of Environmental Protection issued a statewide Code Red Air Quality alert as wildfire smoke moves ...

During Code Red Alerts, residents should consider limiting outdoor activities, and sensitive groups should avoid them.

Wildfire smoke pushing into the state Wednesday afternoon is creating unhealthy particulate matter levels, officials said.

Code Red air quality alert issued The Pennsylvania Department of Environmental Protection has declared a statewide Code Red Air Quality Action Day for particulate matter (PM2.5) for today, Thursday, ...

Residents of Washington, DC, on Sunday briefly experienced the worst air quality of any major city in the world, according to ...