Joan is an international expert in water microbiology, water quality and public health safety. She is co-director of the Center for Advancing Microbial Risk Assessment (CAMRA) and director of the Center for Water Sciences (CWS). She has been involved in the investigation of numerous waterborne disease outbreaks worldwide. Her work has examined new molecular methods for detecting waterborne pathogens and zoonotic agents such as Cryptosporidium and enteric viruses, and source tracking techniques. She has been involved in the study of water supplies, water used for food production and coastal environments, as well as water treatment, wastewater treatment, reclaimed water and water reuse, and quantitative microbial risk assessment.
Joan received her bachelor’s degree in 1976 from the University of Arizona, her master’s degree from the University of Wyoming in 1980 and her doctorate in microbiology from the University of Arizona in 1985.