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

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

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

The Air Quality Index, or AQI, is the primary system used to warn the public when air pollution is dangerous. It’s based on ...

Dust and ash left behind from the January wildfires in Los Angeles County can be irritating and hazardous to health when it's picked up by winds and spread throughout Southern California.

Tens of thousands of people have evacuated their homes and at least two have died in raging fires sweeping across Los Angeles County Wednesday. Multiple wildfires spread by strong Santa Ana winds ...

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

According to the US Environmental Protection Agency (EPA ... The EPA measures regional air quality index (AQI) by how hazardous it is to the general public. Discover the AQI in your city by ...

According to nationwide Air Quality Index data maintained by USA TODAY, areas hit hardest include central LA county around Chinatown, West San Gabriel Valley near Pasadena, areas near the border with ...