Radon is present everywhere, but the greatest exposure is inside buildings. Radon exposure is most likely to happen at home, where people spend most of their time. Your home can have high radon levels whether it is old or new, well-sealed or drafty, and with or without a basement. All houses have some radon, but even houses next to each other can have very different radon levels. The only way to measure your radon risk is to test your home. If you do have high radon levels in your home, there are ways to reduce it.
Radon mitigation is any process or system used to reduce radon concentrations in the breathing zones of occupied buildings. The goal of a radon mitigation system is to reduce the indoor radon levels to below the EPA action level of 4 pCi/L.