Welcome to the Global Information System on Resources for the Prevention and Treatment of Substance Use Disorders. These pages present data collected from WHO Member States in broad categories: 1) governance, policy and financing, 2) service organization and delivery, 3) human resources and 4) national information systems. The latest data were collected in 2014 with the WHO Global Survey on Resources for Prevention and Treatment of Substance Use Disorders (ATLAS-SU survey). The global information system presents all available data to monitor the progress in advancing treatment coverage for substance use disorders (health target 3.5 of the Sustainable Development Goals 2030)