THE REPORT DESCRIBES THE NATURE AND EXTENT OF DRUG TREATMENT SERVICES IN JAILS BASED ON THE RESULTS OF IN-DEPTH INTERVIEWS WITH ADMINISTRATORS, SERVICE PROVIDERS, AND INMATES FROM A NATIONAL SAMPLE OF 118 LOCAL JAILS OF VARYING SIZE. FOUR SERVICE AREAS ARE EXAMINED INCLUDING (1) INTAKE SCREENING, (2) MEDICAL TREATMENT FOR DETOXIFICATION, (3) SOCIAL SERVICES, AND (4) PSYCHOLOGICAL COUNSELING. STATISTICAL FINDINGS AND SUPPORTING NARRATIVE DESCRIBE PROGRAM CONTENT, PROCESSES FOR IMPLEMENTATION, CRITERIA FOR INMATE SELECTION, ADMINISTRATION AND FUNDING, STAFF ROLES, AND COMMUNITY AGENCY PARTICIPATION. EXTENSIVE RECOMMENDATIONS PERTAINING TO STUDY FINDINGS ARE PRESENTED. JAIL PROFILES DESCRIPTIVE OF INMATE LENGTH OF STAY (LOS) ARE DEVELOPED FROM AN ANALYSIS OF THE FINDINGS. A RECOMMENDATION IS MADE THAT PLANNING FOR SERVICES BE PRECEDED BY DEVELOPMENT OF LOS PROFILES SO THAT JAILS CAN ORGANIZE SERVICES AROUND THIS CRITICAL VARIABLE. THE STUDY ALSO RECOMMENDS A SERVICE PROVISION PARTNERSHIP WHICH ASSIGNS TO THE JAIL DIRECT RESPONSIBILITY FOR ADMINISTRATION AND PROVISION OF INTAKE SCREENING AND REFERRAL, WITH ALL OTHER SERVICES TO BE DELIVERED BY APPROPRIATE COMMUNITY AGENCIES BASED IN THE JAIL. (AUTHOR ABSTRACT)