Although the prevalence of cigarette smoking in the U.S.  is declining, tobacco smoking using a waterpipe or hookah is an emerging trend that poses a great threat to public health.  Waterpipe tobacco smoking has been associated with substantial harm and addictiveness.  In previous research, Dr.  Primack and his colleagues found that, at the University of Pittsburgh, ever smoking of tobacco via waterpipe (40.5%) is now higher than ever having smoked a cigarette (39.6%).  Although this work has been highly valuable, it also has limitations including: 1.  a weak response rate of 18.6%, 2.  few items since they were added to a larger study that was already long, 3.  lack of focus on first year students who seem to be most substantially impacted by waterpipe tobacco smoking, and 4.  a cross-sectional design.  The current work will address each of these limitations.  This timely assessment will enable the researchers to: 1.  determine accurately the prevalence and uptake of waterpipe tobacco smoking among first-year students at the University of Pittsburgh, 2.  test a theory-based meditational model relating waterpipe tobacco smoking to demographic, personal, and environmental predictors, and 3.  gather pilot longitudinal data that will support a subsequent major grant application to the National Cancer Institute.