Paul Westerhoff, Ph.D., PE is a Professor in the Department of Civil and Environmental Engineering at Arizona State University (ASU, Tempe, AZ). He leads a group of faculty investigating emerging contaminants in water. He has served as Principle and co-Investigator on AwwaRF, USEPA, USEPA and local projects investigating reactions and fate of oxo-anions (bromate, nitrate, arsenate) during water treatment, characterization of NOM in watersheds and treatment processes and reactions with oxidations, formation of disinfection by-products (chlorine, chlorine dioxide, ozone), removal of taste and odor micropollutants and fate of nanomaterials in water. He has over 65 peer reviewed journal article publications and has been involved in over 150 conference presentations. He belongs to ASCE, AWWA, AEESP, ACS, IOA, IWA, AWPCA, and IHSS and serves on numerous voluntary committees for these organizations. He has received several research awards including the 2005 ASCE Walter L. Huber Research Award and the 2006 Paul L. Busch Award.