The Arrestee Drug Abuse Monitoring (ADAM) program is a restructured version of the National Institute of Justice’s (NIJ) Drug Use Forecasting (DUF) program. Probability-based sampling was used to generate the data in 35 sites across the country and a questionnaire used for the DUF program was enhanced to cover new areas of drug abuse and related behavior. The report shows a site-by-site summary table, as well as tables that show risk for alcohol and drug dependence, admission to treatment, and drug market participation. The data was prepared for use by policymakers, justice system practitioners, and for researchers. The overall findings of the 2000 report conclude that drug use is common among adult arrestees. Some of the report highlights include the fact that in half of the sites, urinalysis testing revealed that approximately 64 percent of adult male arrestees had recently used at least one of five drugs: cocaine, marijuana, opiates, methamphetamine, or PCP. Marijuana was the most commonly used drug, followed by cocaine. Between one-half and one-fourth of all adult arrestees were found to be at risk for drug dependence, although few had ever received drug treatment. Between 35 percent and 70 percent of adult male arrestees had five or more drinks on at least one occasion during the month before their arrest. Data concerning drug markets indicated that the largest market in 23 of the sites was for marijuana; and many of the male arrestees participated in at least 1 type of drug market. The majority of arrestees indicated they had little trouble completing drug transactions. In terms of female arrestees, the report revealed that a large percentage had used drugs. Cocaine was the drug of choice for female arrestees, followed by marijuana. Limited data was offered for male and female juvenile arrestees. Hard core drug use in communities is estimated in this report by calculating rates of hardcore adult male drug-using arrestees. It is estimated that hardcore drug use ranges from 1,500 users in Minneapolis to nearly 126,000 users in New York. Finally, the report offers a series of essays on the new ADAM methodology.