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Students in a senior‐level water supply course at the University of Central Florida were required to account for all personal water use over a 24‐hour day in order to compare student demands with values reported in the literature. The accounting was done by successive classes over eight years, totaling 252 students of both sexes. The plot of average use on arithmetic probability paper gave a good straight line, with a mean of 89 gpcd (337 Lpcd). The one in one hundred frequency values were 59 gpcd (223 Lpcd) and 119 gpcd (450 Lpcd). Water for flushing toilets, at 24.7 percent, and for personal cleanliness, at 59.2 percent, accounted for 83.9 percent of demand.