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

“People living next to these large magnets for diesel pollution are breathing some of the most toxic air in the country.” But trucking industry professionals argue that maps like this could be ...

Poor air quality has been detected in multiple states surrounding California. The state has been hit with multiple deadly ...

According to the map, the 10 ZIP codes with highest exposure are concentrated near the ports and along the 110, 710, and 605 ...

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

The Air Quality Index, often referred to as AQI, is a federal measure of the amount of air pollution, reported on a six-color spectrum from green (good) to hazardous (maroon). There are five ...

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

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