American Water Works Associationhe American Water Works Association is an international, nonprofit, scientific and educational society dedicated to providing total water solutions assuring the effective management of water. Founded in 1881, the Association is the largest organization of water supply professionals in the world. Our membership includes over 4,000 utilities that supply roughly 80 percent of the nation's drinking water and treat almost half of the nation’s wastewater. Our more than 50,000 memberships represent the full spectrum of the water community: public water and wastewater systems, environmental advocates, scientists, academicians, and others who hold a genuine interest in water, our most important resource.