What Is Radon and Where Can It Be Found in My Home?
Radon is an odorless, colorless, and naturally occurring radioactive gas. It is inhaled into the lungs, where it can damage the DNA, potentially increasing cancer risk, says Douglas Arenberg, MD, a professor in the pulmonary diseases and critical care departments at the University of Michigan Health System in Ann Arbor. Radon forms when uranium, thorium, or radium break down in water, rocks, and soil, releasing radon gas into the dirt beneath your home, according to the Centers for Disease Control and Prevention (CDC). Radon can enter your home through cracks and holes in the foundation, through well water, and via building materials, the Environmental Protection Agency (EPA) says. It’s common: About 1 in every 15 homes has what’s considered an elevated radon level. The gas is odorless and invisible, says the EPA, and it causes no immediate symptoms, so the only way to know if your home is affected is by testing your individual residence. “Lung cancer risk from radon exposure occurs over many years of high-level exposure,” Dr. Arenberg says. As the CDC explains, breathing in radon traps these radioactive particles in your lungs, which can eventually lead to lung cancer. Your risk is then increased depending on your exposure level (if you spend a lot of time in the areas of your home with higher radon levels), your status as a smoker, and your exposure to other in-home pollutants, like a wood-burning stove or fireplace.
Home Testing for Radon: The Basement Is Key
Because radon can be found outdoors in low levels, everyone is exposed to it at some point. But it’s much more dangerous inside a home, where the gas is more confined and therefore concentrated at significantly higher levels. An at-home kit (available at most hardware stores) that is labeled as “meets EPA requirements” can be used to test for radon in your home. You can start with short-term (usually two-day) radon testing with a home kit; the sample you collect is sent for analysis, with results mailed to you within a few weeks. You can also do long-term testing, which gives you a more accurate picture of the radon levels in your home — the test measures air quality over a period of about 90 days. Since radon levels can fluctuate frequently, it’s usually best to do a long-term test. Long-term tests can also be performed with a home kit. “It is important to note that for people who do not spend any time in their basement, it may not be necessary to measure your radon level in the basement,” Arenberg says. “Radon is not a problem on upper levels of houses, given the airflow which naturally reduces exposure to radon. I recommend people check the levels only if they have a finished basement or otherwise spend a lot of time in their basement.” When testing, carefully follow all instructions on the kit. Both short- and long-term tests can be done simultaneously. Checking water for radon requires a separate test. Consult your county health department for information on testing your water, or contact a radon specialist.
How to Reduce Radon Levels in Your Home
If the radon levels in your home exceed 4 picocuries per liter, you should take steps to reduce the radon level as soon as possible. Over time, radon will disappear due to radioactive decay. But, “anyone with elevated radon levels should take the time, and spend the money, to get the problem fixed,” Arenberg says. He stresses that you should not panic if you do have high levels of radon in your basement because “it’s very easy to remedy this.” You can install a removal system that allows radon gas from beneath the home to be immediately vented outside. Radon removal can eliminate up to 99 percent of radon from the home, according to the EPA. These devices, called soil-suction radon reduction systems, should always be installed and supervised by a certified radon mitigation specialist or radon remediation service. You or the radon remediation specialist can also seal off any cracks in your home — in the floors, foundation, or walls — to keep radon gas from seeping through the cracks and into the air you breathe indoors. Retesting should be done at regular intervals to ensure that the radon mitigation has been successful. Radon is a common problem with serious potential side effects, and that’s why it’s a good idea for everyone to consider home testing for radon so any potential issues can be resolved. Knowing the air quality of your home can give you peace of mind and leave you breathing a little easier.
