The purpose of the compendium is to provide information on sanitation technologies from across the sanitation value chain. The compendium details the characteristics, advantages and disadvantages of the different technology options, and also describes the different types of systems formed as a combination of the technologies, addressing all stages of the value chain. These technologies have been included in the Technology Decision support Tool for Sanitation (SANITECH), developed by CSTEP. The document was compiled based on literature review and expert validation. The compendium is intended to be a live document, updated as and when new technologies and relevant data become available.