American Water Works Association (AWWA) - International nonprofit scientific and educational society dedicated to the improvement of drinking water quality and supply.

Water Online: Virtual community for the water industry - Daily news and product updates for professionals in the wastewater industry- Information on manufacturing, technology, equipment, supplies, and discussion forums, online chat, newsletter and software

Oklahoma Water and Pollution Control Association - Organization of water and wastewater system operators, dedicated to the advancement of knowledge pertaining to the science of water, waste management and wastewater works operations. Information about training programs and other organization initiatives.

American Society of Sanitary EngineeringDepartment of Sanitary Engineering - Faculty of Civil Engineering STU in Bratislva, SlovakiaDepartment of Civil and Environmental Engineering - University of Wisconsin-MadisonDepartment of Sanitary Engineering - Delft University of Technology - Research and education programs on the 'urban water cycle', namely, including drinking water supply, waste water collection and urban drainage, and waste water treatment.

IHE-Delft, Sanitary and environmental engineering - Welcome to the Department of Sanitary and Environmental Engineering (SEE) of IHE. The SEE department wants to contribute to the development of adequate water supply and waste management services world wide by improving the capacities of individuals and organizations active in and for the sector.