QUINCY, Ill. (WGEM) -- Radon is the second-leading cause of lung cancer in the United States, yet many people don’t regularly test their home for the harmful gas.
Radon is an invisible and odorless gas that can be detrimental to human health when trapped indoors at elevated levels.
Owner of Quincy HomePro Inspections David Zehnle said radon starts in the basement and can spread to higher floors.
"When we do the testing, we test in the lowest livable space in the home, where there is a basement. If there's a slab, you test on the slab. So in the basement, the levels are higher and it depreciates by half the higher you go up," he said.
Zehnle said winter is the best time for testing, and you should do it every two years.
You can buy radon testing kits in home improvement stores to test for radon yourself. Zehnle said you must own the property you are testing on.