Louisville, KY – As Thanksgiving gatherings fill homes across Kentucky, state health leaders are warning residents of a deadly invisible threat that could be circulating inside without anyone knowing. The Centers for Disease Control and Prevention (CDC) and the Kentucky Department for Public Health (KDPH) say radon, a naturally occurring radioactive gas, poses one of the greatest hidden dangers to families during the winter months.
Radon forms underground as uranium in soil, rock, and groundwater breaks down. The gas seeps into homes through foundation cracks, sump pumps, and floor joints, where it becomes trapped — especially when houses are sealed tight for the cold season. Because it has no smell, color, or taste, it’s impossible to detect without testing.
The U.S. Environmental Protection Agency (EPA) estimates that radon exposure causes more than 21,000 lung cancer deaths each year, making it the second-leading cause of lung cancer in the country. Kentucky’s geology makes the state particularly prone to high radon levels, especially in Jefferson, Fayette, and Warren counties.
Testing is the only way to detect radon. Short-term radon kits, available online, at hardware stores, or through the Kentucky Radon Program, cost under $30 and take just a few days to complete. The EPA recommends mitigation if readings reach 4 picocuries per liter (pCi/L) or higher — though no level is completely safe.
If elevated levels are detected, certified mitigation contractors can install venting systems that lower radon concentrations by up to 90%. Sealing basement cracks and improving ventilation can also help reduce risk temporarily.
“Radon is silent, invisible, and preventable,” said CDC health officials. “Testing your home this Thanksgiving could be one of the easiest ways to protect your family.”
As families across Louisville, Lexington, and Bowling Green gather indoors for the holidays, Kentucky officials urge residents to add radon testing to their winter home checklist — before this silent killer lingers through the season.
