Radon ← Knowledge Base Where does Radon come from? What is the "acceptable" level of radon? What do I do when I find high radon levels in my home? I'm thinking of buying a home with a radon mitigation system installed. What should I look for in order to make certain it is working properly? What are the advantages and disadvantages to having a mitigation system installed? We are thinking of selling our house and buying another. Where can we get some guidance on what to do about potential radon problems at either location? How do I test for radon and can I do it myself? Are there other symptoms of health problems, other than lung cancer, that are associated with radon gas exposure? What are the risks from radon gas? Where can I obtain copies of EPA's publications about radon?