Jim F. Chamberlain, PhD, P.E., BCEE, has worked in the field of hydrology and environmental engineering since 1979. As a Co-Director of the OU WaTER Center, Jim has implemented research and projects on fluoride mitigation in Ethiopia, arsenic mitigation in Cambodia, water supply distribution in El Salvador, and solar water pumping and hand pump repair in Uganda. David A. Sabatini, PhD, P.E., BCEE, is David Ross Boyd Professor and Sun Oil Company Endowed Chair of Civil Engineering and Environmental Science at the University of Oklahoma. He is the Founding Director of the OU WaTER Center. His research focuses on sustainable drinking water systems for developing countries, surfactant-based environmental and biofuel technologies, and understanding/characterizing groundwater contaminant transport and remediation.