The advisories impact large areas of Idaho, Oregon, Montana and Washington, lasting through the end of January.

The Idaho Department of Environmental Quality’s air quality map showed readings over 200 in Garden City and Meridian at times ...

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

The Air Quality Index measured 156 near Forks, Washington, and received a rating of "unhealthy," meaning some members of the ...

BOISE, Idaho — Groundhog Day is still about a ... and the Boise and West Central Mountains due to the possibility of reduced air quality. January comes to a close on Friday, and that's also ...

There's confusion over how safe air quality is in L.A. as fires continue to burn, spewing wildfire smoke and toxins. We look at air quality readings, what's real and what's not and what people can do.