As it further breaks down, radon emits atomic particles. These particles are in the air we breathe. Once inhaled, they can be deposited in our lungs. The energy associated with these particles can alter cell DNA, thus increasing the risk of lung cancer. Radon ususally does not present a health risk outdoors because it is diluted in the open air.
Radon can, however, build up to dangerous levels inside a house.
Go back to top Radon Entry Radon can enter your new house through cracks or openings in the foundation. The differences in air pressure between the inside of a building and the soil around it also play an important role in radon entry. If the air pressure of a house is greater than the soil beneath it, radon will remain outside. Because radon comes from the soil, the geology of an area can help to predict the potential for elevated indoor radon levels. To determine which radon zone your new house will be built, please contact your State radon office.