Structure and History

As the largest trade association of its kind in the world, the PSAI is recognized internationally as a credible, authoritative voice providing education and information to promote safety and health.

Get to Know the PSAI 

Established in 1971, the PSAI develops and promotes industry standards; serves as a repository of information and resources for operators, suppliers, government entities and the general public; and provides recognition for excellence in the field. Through our efforts, people can access sanitation in places where it is not otherwise available and the environment is a cleaner, safer place.

The PSAI represents hundreds of companies in dozens of countries worldwide.

  • Portable Restroom Operators (PROs) serve the public by providing portable restrooms and related services.
  • Industry Suppliers provide supplies and services – both directly and indirectly – to portable restroom operators. Suppliers are also sometimes called “Associates.”

The organization is structured so that its priorities and its future are always in the hands of its Members. 

Industry ScopeWeb_portableunitA_square

The portable sanitation industry has developed into a $4 billion dollar a year business. Worldwide, an estimated 3 million portable restrooms are in use, serviced by a fleet of over 10,000 trucks. The industry includes more than 3,600 businesses and 39,000 employees worldwide.

Top uses for Portable Restrooms:

  • Construction and various work sites – commercial, industrial, residential, etc.
  • Parks and recreation – parks, campgrounds, pools, private homes, etc.Web_man&child_square
  • Government agencies – military facilities, etc.
  • Sporting events – stadiums, auto races, golf tournaments, etc.
  • Outdoor public gatherings – concerts, festivals, fairs, weddings, etc.
  • Disaster relief – floods, fires, hurricanes, and earthquakes
  • Permanent human settlement areas


Organizational Leadership  

The PSAI is governed by a volunteer Board of Directors composed of Members who are portable restroom operators and suppliers. These leaders are elected by the Membership on a rotating schedule. Executive Director Karleen Kos – the staff leader responsible for daily operations – serves as a non-voting member of the Board. 


Click here to meet the PSAI Board of Directors.

Click here to meet the PSAI staff.


Governing Bylaws and Key Policies

The PSAI regularly updates its bylaws and policies to align with the organization’s mission and vision, and to best serve its Members. 

If you have questions about the PSAI, please contact Karleen Kos at or 952-854-8300.


Background on the Portable Restroom Industry

Portable restrooms have been used since the 1940s during the height of World War II, with the earliest units being made out of wood and metal. They were needed to provide sanitation to meet the needs of rapidly constructed military bases, industrial operations that were booming, and support similar activities associated with the rapid movement of people into areas where the infrastructure was inadequate.

The PSAI Trade Association was formed in the United States in the early 1970s to serve the WoodAndyGumpcommon interests of the growing industry and to standardize services and communication. By the early 1990s, after many years of invention, innovation and perfection, portable restrooms were more commonplace than ever before and the marketplace begin introducing new offerings such as Restroom Trailers, VIP Units, Portable Water Systems and Solar Powered Units.

In the new millennium, portable sanitation is recognized as an integral part of society in many parts of the world. Construction sites, parks, residential home building and special event venues all were expected, and now legislated, to have portable restrooms. The PSAI’s growth has been steady and strong, and includes international membership spanning six continents.



For more about the PSAI’s historic milestones, click here.