Radon in the indoor environment is a recognized environmental hazard. The Environmental Protection Agency (EPA) has established several programs to develop, demonstrate, and transfer radon mitigation technology. Administration and management of these programs are shared by EPA's Office of Radiation Programs and Office of Research and Development. One measure of success of these programs is that, by 1990, approximately 90,000 houses have been professionally mitigated in the United States. Future success depends, in part, upon strong motivational campaigns conducted in local communities with regional and national support.