Radon is a radioactive, colorless, tasteless, and odorless gas found naturally occurring in the environment. Radon is the second-leading cause of lung cancer in the United States after smoking. To protect the public, many states have developed laws and regulations governing radon disclosure, radon certification and mitigation. Some states have also developed mandatory radon testing provisions in schools and homes in certain contexts.

This dataset explores the provisions that the states have developed in regard to radon and the potential public health impact from elevated radon levels.