Data for this analysis were taken from the evaluation information system of the Idaho ASAP. The Idaho ASAP was fully operational from 1972 through 1975. In 1975, Federal funding was terminated, accounting for the decrease in some referral and classification activity. In 1975, 2,548 presentence investigations were conducted, including 1,696 drinker classifications. Of these, 49.8 percent were classified as problem drinkers, representing a significant increase in those so classified in previous years. Another 715, or 42.2 percent, were classified as nonproblem drinkers, and 8 percent were classified as undefined. Analysis of both classication and referral activity reveals significant decreases in 1975 compared with 1973 and 1974. There was also a significant decrease in the number of presentence investigations in 1975. Analysis of rehabilitation attendance by drinker class shows a significant decrease from 1974 through 1975 in the number of problem drinkers referred to court alcohol school and the driver improvement counseling program and a significant increase in the referral of nonproblem drinkers to court alcohol school. Referrals of undefined drinkers to both these treatment modalities decreased, while their referral to other treatments increased. Profile analyses of problem and nonproblem drinkers revealed that significant differences of divorce rates, unemployment rates, and lack of education may be indicative of the degree of the DWI offender