State scientists are calling Saturday an air quality action day with Canadian wildfire smoke moving in across New Hampshire.

A Code Red Air Quality Alert is in effect for parts of Philadelphia and the Jersey Shore on Friday night, according to AirNow ...

Montreal had the worst air quality in the world on Saturday as smoke from wildfires in the Prairies drifted east. In addition ...

While eastern parts of Canada are feeling the effects of wildfires in the prairies, leading to poor air quality, the coastal ...

IQAir, a Swiss air quality technology company, on Saturday morning ranked Montreal as the city with the worst air quality in the world. By early afternoon, it had dropped to second place behind ...

An air quality alert for the Tri-State Area has been extended through the weekend due to smoke from the Canadian wildfires.

But when smoke plumes are close to the surface, people are breathing in wildfire chemicals and tiny particles. Those particles, known as PM2.5, can get deep into the lungs and exacerbate asthma and ...

An Air Quality Health Advisory has been issued for several counties in the Capital Region, according to the New York State Department of Health and Department of Environmental Conservation.

Massachusetts, New Hampshire, Vermont, Rhode Island, parts of Eastern New York, and Southern Maine are under air quality ...

New York was hit with an air quality alert Saturday as smoke from Canadian wildfires drifted across the state, pushing levels ...

State officials from Maine to New York issued alerts for fine particulate matter, a toxic byproduct of wildfires that is ...

Smoke from Canadian wildfires pushed into New England Saturday, bringing hazy skies and unhealthy air quality to some spots, including Boston.