The map pulls data from air monitors, hundreds of pollution sensors, and forecast models to provide real-time air quality index (AQI) readings for more than 1,000 locations. Los Angeles’ air ...

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

Toxic smoke and dangerous particulate pollution are spreading far beyond the flames, leaving air quality at unhealthy levels in multiple counties.

Wildfires are tearing through thousands of acres in Los Angeles County in California, as strong Santa Ana winds stoke the ...

The Air Quality Index measured 156 near Forks, Washington, and received a rating of "unhealthy," meaning some members of the general public may experience health effects and members of sensitive ...

So the agency added a disclaimer above the map: “Windblown ash particles may be too large to be detected by air-quality instrumentation and not reflected in the Air Quality Index (AQI ...