Radon is found in soil and rocks. It can enter our home or office through cracks and gaps in the foundation walls. Radon can also be found in well water. The amount of radon in the air is measured in picocuries per liter or “pCi/L.” Indoor levels can be as outdoor, 0.3 pCi/L or measure hundreds of times higher. The NEHA action level of 4.0 pCi/L.
Radon problems have been identified in almost every state, with the highest amounts measured in Pennsylvania, New Jersey, Maryland, Maine, Florida, New York, Colorado, Tennessee, and Montana. The NEHA estimates that 1 out of every 15 homes in the United States has an elevated level of radon gas. In some areas, as many as 1 out of every 5 homes may be affected.
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