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Radon
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danger from radon gas was slight because of the exchange of air from inside the house to the outside. Now, with houses more tightly sealed, radon concentrations are more likely to build to dangerous levels, Dr. Einarson said.
Although nearly half of the homes tested in the county were above safe limits, Dr. Einarson said, most were just above the 4 pCi/1 safety limit recommended by the ERA. That is not the case in other areas of the country, where concentrations in some homes were mea
80.1%