Nationwide distribution of indoor radon measurements

Recently there has been increasing concern about the health hazard of lung cancer associated with indoor radon in the United States. Because of this concern, Track Etch radon detectors are being used in indoor radon surveys in the United States and elsewhere. The Track Etch method for measuring radon has been described previously. Until quite recently only a small number of long-term indoor radon measurements had been made in the United States. The recent widespread use of the detectors has led to the accumulation of a data base consisting of over 60,000 indoor radon measurements made as of mid-1987 throughout the United States in individual residences with long-term Track Etch detectors. This collection of indoor radon measurements and some of the conclusions that may be drawn from them are the subject of this paper