The study was carried out in a random sample of 12 houses which were located in the upper-middle class socioeconomic area of Tucson, Arizona, and divided into equivalent groups of 3 houses. Each house had six adolescents and two foster parents. It was hypothesized that by making all residents aware of usage patterns and the value of utilities that the overall usage level could be reduced. The study lasted 11 months, with baseline periods varying from 6 to 9 months. During this time, utility unit changes were measured every 3 days. Each resident in the test groups was given a manual on utility usage and conservation and passed to quiz on the material. During the feedback period, each house was notified of increase/decrease changes in utility usage levels. Conditions and time periods varied according to group assignments. Patterns of usage and usage means for each group were analyzed. Percentage-change analyses were employed to detect any differences. Both manual and feedback conditions were effective in reducing utility usage from baseline levels. Change was particularly evident in groups with initially high usage patterns. It was concluded that intervention and monitoring of utility usage of adolescents helps to increase their awareness of its importance. Graphs and tables accompany the study. (Author abstract modified)