Public health educational campaigns can attract large numbers of one-time participants, but the impact on subsequent behavior remains unstudied. The American Cancer Society Texas Division, Inc. sponsored a statewide $50.00 mammography screening project in early 1987. More than 64,000 mammograms were completed at 306 centers; 37,000 screenees answered a 31-item questionnaire. Attitudes toward screening were assessed, and screening history was recorded. Eighteen months after the project, a follow-up questionnaire was sent to 1000 screenees; 411 women returned the questionnaires. In the year following the project, 51% of the women 50 years and older reported having a subsequent mammogram. Among the women in this group who had never had a mammogram prior to 1987, 42% had screening mammography repeated in the following year. These data show that media-based public education projects can be effective mechanisms for improving and maintaining compliance with mammography screening recommendations.