Who can test a building for radon? What is the "acceptable" level of radon in air? Radon Testing During Real Estate Transactions Where should home testing be done? Can the radon level in a building's air be predicted? Radon Resistant Construction Who should I hire to install radon-resistant features? http://sosradon.org/faq What is a "picocurie" (pCi)? How often is indoor radon a problem? What are radon-resistant features? Mitigating Radon Problems What testing protocol should be followed? What are the benefits of radon mitigation? Can vacant houses be tested for radon? Who should I hire to correct a radon problem? frequently asked questions about radon Does radon in drinking water pose a risk? What is a radon mitigation system? What can be done to reduce radon in a home? Testing Air for Radon What is a "working level" (WL)? How does radon get into a building? What health effects are associated with radon exposure? When should radon-resistant construction be considered? What are the benefits of radon-resistant construction? Should a home built with radon-resistant features be tested? Where can I get more information about radon issues? What is radon? Why should I test my home for radon? What kinds of test devices are used? General Questions Do radon levels increase with the age of a home? Why are short- and long-term tests used? frequently asked questions about radon http://sosradon.org/faq#how-does-radon-get-in-water Why is 4 pCi/L the recommended action level for Radon?