Short answer: yes – but it's also one of the most preventable home health risks there is.
Yes – radon is genuinely dangerous, and the risk is well documented. It's the #1 cause of lung cancer in people who have never smoked, and it causes an estimated 21,000 deaths a year in the U.S. Because South Dakota's levels are so high, it's a real local concern, not a distant one.
The danger is that it's silent. Radon has no smell, no color, and no immediate symptoms – exposure builds risk quietly over years. That's also what makes it so preventable: a simple test reveals it, and mitigation removes it for good.
Radon is the second leading cause of lung cancer after smoking, and the leading cause among non-smokers. For smokers, radon multiplies the risk significantly.
South Dakota ranks among the highest-radon states, so elevated levels are common here. Worry isn't needed – testing is. If it's high, it's fixable.
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