Abstract
California Substance Abuse Research Consortium (SARC) meetings have become a mainstay in supporting alcohol and other drug (AOD) information exchange on research to policy and other initiatives within the state. One integral component of SARC is discussion of regional data on emerging and changing substance abuse trends. This article provides highlights from the substance abuse epidemiology portion of the May 2003 meeting, as presented for the San Francisco Bay Area, Fresno County, Los Angeles County, and San Diego County.