Terradex measurement program

A rapidly growing data base consisting of over 60,000 indoor radon concentrations measured with passive integrating Track Etch detectors is described. The data base is subdivided by state, and a variety of statistical parameters summarizing the contents of the data base are presented for each state. Certain states are better characterized than others in terms of having a variety of radon surveys done all over the state so that the statistical parameters given may be fairly representative of the state. The primary conclusions that can be drawn are that there are some homes with unacceptably high radon levels in nearly every state and that there exist regions where a significant fraction of homes have unacceptably high radon levels