About PSAI Mission It is the mission of Portable Sanitation Association International ( PSAI ) to expand and improve portable sanitation services and facilities worldwide and to be recognized as the authority within our industry. Continues to educate the industry, general public and government entities and provides tools to promote safety and health. Represents International members through a regional network and assists and promotes the setting of standards and services as a repository of information and resources for all. Through our efforts, the environment is a cleaner, safer place. The portable sanitation industry has developed into a 1.5 billion dollar a year business. Worldwide, there are an estimated 1, 400, 000 portable restrooms in use, serviced by a fleet of 9, 400 trucks.