If you're buying or selling a home in North Dakota, there’s one invisible factor that should be on your radar: radon gas.
Radon is a naturally occurring radioactive gas that seeps into homes from the ground. It’s odorless, colorless, and tasteless—but it’s also the second leading cause of lung cancer in the U.S., right behind smoking. And here’s the kicker: North Dakota has some of the highest radon levels in the country.
Why Is Radon a Big Deal in North Dakota?
The geology of North Dakota—especially its soil and rock composition—makes it a hotspot for radon. According to the EPA, most of the state is in Zone 1, meaning average indoor radon levels are likely above the safe limit of 4.0 picocuries per liter (pCi/L).
That means even new homes with modern ventilation aren't immune.
What Homebuyers and Sellers Should Know
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Testing is simple and affordable. You can get a radon test kit for as little as $10–$20 or hire a professional.
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Mitigation systems work. If levels are high, a radon mitigation system can usually bring them down significantly—often for under $2,000.
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Disclosure laws matter. Sellers in North Dakota are required to disclose known environmental hazards, including radon if it's been tested.
Bottom Line
If you're house hunting or listing a property in North Dakota, don’t skip the radon test. It’s a small step that can have a big impact on your health—and your peace of mind.