William Mitch, PhD, PE, is a Professor in the Department of Civil and Environmental Engineering at Stanford University. Over the past 20 years, he has studied disinfection byproduct formation mechanisms with a particular focus on nitrosamines and evaluated techniques to minimize the formation of disinfection byproducts.
His research focuses on conventional drinking water and potable reuse, including MF/RO/AP systems, O3/BAC-based systems, advanced oxidation processes and treatment of RO concentrate and has received funding from the National Science Foundation, the Water Research Foundation, and the United States Department of Agriculture.
Mitch has been recognized for excellence in research and reviewing by the journal Environmental Science and Technology. Before joining Stanford, Mitch served 13 years on the faculty of Yale University. 
He has a BA from Harvard University, an MS and PhD In Civil and Environmental Engineering from University of California, Berkeley, and is a professional engineer in California.