The Water Quality Association (WQA) is a not-for-profit trade association founded in 1974, representing over 2,500 member companies in the water treatment industry globally. Based in Lisle, Illinois, WQA is dedicated to improving awareness of water quality and advancing the science and technology of water treatment.

WQA offers a range of services, including the Gold Seal Product Certification Program, which certifies drinking water treatment products to ensure they meet high safety and performance standards. The association also conducts scientific research through the Water Quality Research Foundation, focusing on drinking water contaminants and the benefits of treated water. Additionally, WQA provides educational resources and professional development opportunities for its members, including an annual convention for networking and knowledge sharing.

Through its commitment to integrity and professionalism, WQA supports manufacturers, dealers, and service providers in demonstrating product reliability and delivering trusted water treatment solutions.