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

Air quality in wildfire-stricken Los Angeles improved on Thursday from hazardous peaks hit earlier this month, as tiny soot ...

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’t breathe a ...

The USA TODAY analysis focused on days were the Air Quality Index, or AQI, was above 100. At this point, breathing the air primarily poses a risk to sensitive groups but can also impact healthy ...

Several parts of southern California are currently under windblown dust and ash advisories as deadly wildfires continue to ...

Some studies have indicated that young children, especially those under the age of 4, are at particular risk because their ...

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

Smoke from the wildfires can wreak havoc on your health. Here are tips to stay safe.

Viruses, bacteria and fungi cause many of these problems, but Arizona’s air pollution ... Quality issued high pollution ...

AirNow is a collaborative effort of federal agencies that provides air quality data across the U.S. The site also has ...

Here's what to know about improving your air quality at home during a wildfire—these expert tips help you breathe easier when ...