In 1999, the Harvard School of Public Health College Alcohol Study surveyed 734 US college administrators to learn what colleges were doing to prevent binge drinking. Respondents rated the severity of student alcohol-abuse problems and described prevention efforts and institutional investments in prevention infrastructure. Prevention practices were widespread in the areas of general education about alcohol, use of policy controls to limit access to alcohol, restricting advertising at home-game sporting events, and allocation of living space to alcohol-free dormitories. Programming was less prevalent for more targeted alcohol education, outreach, and restrictions on alcohol advertising in campus media. Nationally, most of the surveyed colleges reported having a campus alcohol specialist, many had task forces, and about half were performing in-house data collection. Less common were program evaluations, community agreements, or neighborhood exchanges. Prevention practices varied with institutional characteristics and the surveyed administrators' perceptions of the severity of alcohol problems.