The ADAM survey was operational from 2000 to 2001 and from 2007 to the present (2010). ADAM surveys arrestees within 48 hours post-arrests about drug use, drug markets, and drug and mental health treatment. ADAM also uses a bioassay to test for recent drug use. The principal purpose of ADAM is to estimate the prevalence and trends in drug use and related behaviors among arrestees, and a secondary purpose is to monitor drug-market practices. In addition, it is a research platform with the potential to provide data on other policy-relevant issues. Adam reaches a population of drug users omitted by the National Survey on Drug Use and Health (NSDUH). The ADAM population consists mostly of chronic drug users. ADAM is administered twice per year in 14-day periods. Abst Associates cleans the data; matches the interviews, drug test, and booking records; performs diagnositc testing to assure adherence to study protocols; documents and prepares data for analysis and storage; and prepareas annual reports. This presentation also provides information on ADAM’s selection of counties and the sampling of booking facilities. Other major sections of this presentation address the replacing of missing interviews, the imputing of missing urine specimens, weighting, estimation, and a summary of design considerations. A paper on drug use among San Diego Arrestees dated May 2010 is also provided, along with a description and benefits of Substance Abuse Monitoring (SAM).