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Radon is an odorless gas that causes more than 20,000 cancer-related deaths every year. Iowa and North Dakota have the highest risk-level for radon, and now a central Iowa real estate company has ...

Living in a newer home in Eastern Washington does not eliminate the risk of having elevated radon levels, even though building construction codes have required radon mitigation for nearly 20 years.

The test showed her radon level was 8.6 picocuries per liter, or pCi/L -- the EPA recommends fixing the problem at 4 pCi/L -- and she hired a certified specialist to install a system to ventilate the ...