Karl G. Linden, Ph.D., is the Helen and Huber Croft Professor of Environmental Engineering at The University of Colorado Boulder. He has a BS from Cornell University and an MS and PhD from University of California Davis. He teaches classes on UV Processes in Environmental Systems, Sustainable Water Reuse, Water Sanitation and Hygiene, and Environmental Engineering Design. Dr. Linden’s research investigates novel water and wastewater treatment systems, including sustainable, appropriate, and innovative systems for disinfection of pathogens and oxidation of chemical contaminants. He has authored over 120 peer-reviewed publications and given over 100 invited lectures worldwide. Internationally, he and his students are working on water and sanitation projects in Peru and Rwanda, and he is PI of a team working on the Bill & Melinda Gates Foundation Reinvent the Toilet Challenge. Dr. Linden received the 2013 Pioneer Award in Disinfection and Public Health from the Water Environment Federation. He serves as Trustee of the Water Science and Research Division of the American Water Works Association, and is President of the International Ultraviolet Association (IUVA).