An appraisal of factors relative to air pollution was made in Tennessee by the Public Health Service at the request of, and in cooperation with, the State of Tennessee Department of Public Health, for purposes of determining the status of air pollution in the State and the need for activity by the State government in solving air pollution problems. These purposes were accomplished through interpretation of information obtained by review of existing published and unpublished material, by interviewing local health officers, city officials, and others; by personal observation; and by questionnaires.