This report presents the findings of the 1987 National Drug and Alcoholism Treatment Unit Survey, a national survey designed to measure the location, scope, and characteristics of drug abuse and alcoholism treatment and prevention facilities, services, and activities throughout the United States, including the District of Columbia, and the U.S. territories. An introductory chapter describes the background of the survey, the report format, characteristics of the reporting base, and data considerations and limitations. Chapter 2 examines utilization rates, locations of units, unit ownership, unit orientation, the annual unduplicated count of clients, client demographics, type of care, services provided, and estimates of the number of intravenous drug users among both drug abuse and alcoholism clients. Chapter 3 presents data on drug abuse clients and chapter 4 examines alcoholism clients. Since separate client matrices were used to collect data on drug abuse and alcoholism clients, the matrix data are presented separately in chapters 3 and 4. Chapter 5 looks at the funding and financial data, including estimates of costs per client. Appendix A contains a glossary of the terms used in the survey and Appendix B is the data collection instrument. Forty-eight data tables are included. (NB)