With approximately 1.5 million decentralized wastewater systems in use, it is our mission as an association, with the help of our members, consumers and local government; to ensure that we put the water back into our communities the way we found it. Today the organization has grown to encompass all disciplines of the industry and has continued to expand its impact, and supports improvement in all
of the industry's professions. These professional areas include regulators, designers, Installers, Operations and Maintenance support, and manufacturers/suppliers operating in the state of Washington. WOSSA has since been a leading onsite professional membership association for the onsite septic industry with key consideration to the Consumer, Public Health and the Environment.
