We examined hospital utilization and use of community facilities for the treatment of alcohol problems in Ontario using Statistics Canada, Hospital Medical Records Institute records, and other administrative records. Between 1974 and 1986 there was a large drop in utilization of hospital services for treatment of alcohol problems. Rates of alcohol inpatient cases in general hospitals dropped by 47% and in mental hospitals by 33%. At the same time, there was an increase in overall availability of hospital beds and bed-days of care for all medical conditions, and no change in the total number of hospital discharges (1.3 million) and occupancy rates (80-85%). Also at the same time, the number of community-based programs for the treatment of alcohol problems increased, as did the number of persons or cases treated by them. This was associated with a drop of inpatient cases treated for alcohol problems in 38 out of 48 counties in Ontario (P