The Professional Explanation
For Marty Booth, a meteorologist for the Utah Climate Center, the current air in Utah is an issue.
"I bike every day to work. I've been affected by it already."
Particulate matter, also known as particle pollution, is a complex mixture of extremely small dust and soot particles. Due to a combination of wind and fires in Nevada and Idaho Utah is experiencing spiking levels of PM2.5 as well as ozone.
"We're now moving into this pattern here where we have a high pressure system moving over the top of us. It's locking in the smoke that's been blowing in from the west-northwest over the past few days. We are getting some of the PM2.5 or some of the soot you see in the air from fires, but the strong bad air quality you're seeing is not necessarily due to just the smoke."