January is Radon Action Month, and the Cook County Department of Public Health is encouraging residents to test their homes for radon. This gas is colorless and odorless, making it a hidden danger. It ranks as the second leading cause of lung cancer in the U.S., following smoking, contributing to around 21,000 lung cancer deaths each year, as reported by the U.S. Environmental Protection Agency.
Radon comes from the natural decay of uranium and thorium found in soil and rocks. It can sneak into homes through cracks in foundations, gaps around pipes, and even through dirt floors. Because it’s undetectable without testing, residents need to take this seriously. “Testing your home is simple, and if needed, there are effective ways to reduce exposure,” said Dr. Kiran Joshi, the chief operating officer of the department.
The Cook County Department provides free radon test kits to suburban Cook County residents. Others can buy kits through the American Lung Association. It’s vital to know that high radon levels can build up in basements, which poses a significant health risk. “Many people don’t realize their home might have elevated radon levels, even if their neighbor’s doesn’t,” Dr. Joshi added.
Testing results showing radon levels of 4 picocuries per liter (pCi/L) or more require action to reduce exposure. A picocurie measures radioactivity—4 pCi/L is the threshold where remediation steps should be taken. Levels between 2 to 4 pCi/L also warrant consideration for action.
Effective ways to reduce radon include sealing cracks in floors and foundations and installing specialized ventilation systems. The county points out that dangerous radon levels can be found in homes across all states, putting both smokers and nonsmokers at risk for lung cancer, as there are no immediate symptoms of exposure.
In recent years, awareness about radon has grown. According to a survey by the American Lung Association, only about 20% of American homes have been tested. This highlights the ongoing need for education and action. With proper radon mitigation, buying a home can be safe, but testing remains a critical step.
To learn more, you can visit the EPA’s radon page for additional resources and information.
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