Since its inception in 1999, the Drug Use Monitoring in Australia (DUMA) program has been the only nationwide survey of drug use by alleged offenders in Australia conducted on a routine basis. It operates in nine sites across Queensland, New South Wales, South Australia, Western Australia, Victoria and the Northern Territory and provides policymakers and law enforcement authorities with timely and critical information on drugs and crime. This report outlines key trends in drug use by police detainees during 2007–08.