The project involved eight different agencies, including 24 different service delivery units. Between October 1993 and March 1995, the project evaluation team collected data on client characteristics and treatment services. It was found that 2,391 clients received services over the period. Most clients were male (60.6 percent), Hispanic (54.4 percent), had never been married (63.6 percent), and did not have children (59.1 percent). Clients ranged in age from 11 to 79 years, with a mean age of 27.6 years. Over the period, 62,407 instances of treatment services were documented. Clients spent a mean number of 83.93 days in treatment. Ethnicity and drug of choice significantly affected the probability of a client leaving treatment. Hispanic residents tended to stay longer than whites or blacks. Those who used cocaine or other drugs tended to leave earlier than those who used alcohol. Treatment outcome evaluation findings are detailed with respect to client characteristics, drug use at the time of program intake, and drug use patterns at follow-up. 7 figures