Introduction: High-risk alcohol use by U.S. college students remains a significant threat to individual health and community well-being. Newly-emerging social media platforms and apps which relay information about alcohol-related law enforcement serve as an intriguing addition to college alcohol-use environments. The purpose of this study was to examine the information delivered to users by the local social media platform Drinking Ticket (DT), determine which types of information were then relayed to others, and clarify how this information influences alcohol use, perceived risk, and alcohol-related risk behaviors among college students. Methods: One year of DT tweets (n=854 tweets) were qualitatively coded into themes using the constant comparative method, and a survey of university students (n=658) was collected to determine the characteristics of DT users and the influence of DT on students' alcohol use behaviors and perceived risk. Results: The majority of tweets described roadside information, most tweets (79.4%) referenced off-campus locations, and safety alerts were the most commonly retweeted type of message. DT exposure did not moderate the relationship between alcohol consumption and perceived risk of alcohol-related legal consequences after controlling for sociodemographic characteristics. Discussion: Given the higher-risk alcohol behaviors of the DT user base, it and similar platforms may present a particularly useful space for presenting alcohol risk reduction messages to college students. Such platforms also provide useful safety-alert messages which can surpass the limitations of university-sanctioned alert systems. [The dissertation citations contained here are published with the permission of ProQuest LLC. Further reproduction is prohibited without permission. Copies of dissertations may be obtained by Telephone (800) 1-800-521-0600. Web page: http://www.proquest.com.bibliotheek.ehb.be/en-US/products/dissertations/individuals.shtml.]