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A colorless, odorless gas you can't detect without a test – and the leading cause of lung cancer in non-smokers.
Radon is a naturally occurring radioactive gas produced as uranium in soil and rock breaks down. It's colorless, odorless, and tasteless – which is exactly what makes it dangerous. You can be exposed to high levels for years with no warning signs at all.
Radon forms deep in the ground and rises toward the surface. Outdoors it dilutes harmlessly, but when it seeps into an enclosed home it can build up to unsafe concentrations. South Dakota's glacial soils are especially rich in radon-producing material, which is why the state ranks among the highest in the nation.
Homes act like a chimney: warm air rising inside creates a slight vacuum that pulls soil gas – including radon – in through cracks, sump pits, and gaps around the slab. Learn more about how radon enters your home.
Radon is the #1 cause of lung cancer in non-smokers and the second leading cause overall. Because South Dakota's radon levels are so high, testing isn't optional here – it's essential. The good news: if your home tests high, mitigation fixes it permanently.
Radon is present almost everywhere at some level. The question isn't whether you have radon, but whether it's concentrated above the EPA's 4.0 pCi/L action level – and the only way to know is to test.
No. Radon is completely colorless, odorless, and tasteless. A test is the only way to detect it.
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