There is great need to conduct ground water quantity and quality research in the developing world. The ultimate aim is to developing safe and sustainable drinking-water resources. Such research entails many logistical and financial difficulties not faced in more-developed countries. In addition, research and applied technologies that address the problems need to be consistent with a country’s or community’s socioeconomic situation and culture. This session addresses research efforts meeting these challenges, while generally advancing society toward the United Nations Millennium Goal of ensuring environmental sustainability including increasing access to safe drinking water. Presentations address hydrogeological research efforts in poorer, economically-developing countries with an emphasis on enhancing and developing safe and sustainable drinking-water supplies, and international education in these countries.