A cancer-causing element known as radon can be found at high levels in roughly half of the homes tested over the past five years in Dane County. Radon is a naturally occurring radioactive gas that can seep into homes from the ground through cracks, gaps, and openings in the foundation. Over time, high exposure to this colorless, odorless gas can lead to lung cancer.

"Because radon can't be seen, smelled, or tasted, it can pose a silent threat that many might overlook. Testing is the only way to know if there are high levels lurking in your home and be able to address it before it's too late," said Brandon Macomber, Environmental Health Supervisor for Public Health Madison & Dane County.

Radon is the leading cause of lung cancer among non-smokers, killing 21,000 Americans every year. The risk is even higher for people who smoke because of the ways that radon and tobacco smoke damage the lungs.

January is National Radon Action Month. The South Central Radon Information Center, representing Dane, Rock, and Green counties, urges everyone to test their home for radon.

"Radon test kits are readily available online, at your local hardware store, or you can order them through Public Health. The steps for the test itself are straightforward, and results are usually available in two to three weeks," said Macomber.

Homeowners can call the South-Central Radon Information Center at 608-243-0392, send a check made out to Madison City Treasurer to Public Health Madison & Dane County (Attn: Radon Program) at 2300 S. Park Street, Room 2022, Madison, WI 53713, or pick up a test kit at one of these locations :

• Atrium Office: 2300 S. Park St., Suite 2010, Madison
• East Washington Avenue Office: 2705 E. Washington Ave., Madison

If test results show that there is a concerning level of radon, a certified contractor can install a system to prevent radon from getting into the house. For more information regarding radon, including a list of qualified radon remediation contractors, visit the Wisconsin Radon Information webpage.