After fires destroyed multiple neighborhoods across Los Angeles County, many residents looked up to find blue, smoke-free ...

Indicators like the Air Quality Index (AQI), commonly used to track air pollution levels, provide a rough sense of the ...

Sierra County was worst affected, with a peak Air Quality Index (AQI) of 168 in its county seat of Downieville, according to ...

Unlike typical wildfires, smoke from the L.A. fires — consisting of toxic materials from burned down homes, cars, and more — ...

Wildfire ash carries many carcinogens that could cause short- and long-term health problems, including asthma attacks and ...

Angelenos still bothered by the smell of smoke may be surprised to see that Air Quality Index numbers returned to “healthy” or “moderate” levels this week in L.A. County, but they shouldn ...

Think back to the red AQI forecast on your phone. What information was it trying to convey? The Air Quality Index (AQI) is a ...

Portland’s air quality is currently comparable to Los Angeles, despite the ongoing wildfires in Southern California.

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

The LA wildfires have burned tens of thousands of acres – but on some weather maps, air quality still looks good. What’s ...

Air quality remains a big concern in Los Angeles County, and not just for those nearby the Palisades and Eaton fires.

The Oregon Department of Environmental Quality issued an air quality advisory for La Pine Tuesday due to stagnant air ...