Charles N Haas

Charles N. Haas is an American environmental engineering professor whose work focuses on quantitative microbial risk assessment (QMRA) and its application to drinking water quality, wastewater reuse, and public health protection. He is a professor of civil, architectural, and environmental engineering at Drexel University and was elected to the United States National Academy of Engineering in 2021 for contributions to quantitative microbial risk assessment for drinking water quality and public health.

Education and career Haas earned undergraduate and graduate degrees in biology and environmental engineering at the Illinois Institute of Technology, followed by a doctorate in environmental engineering from the University of Illinois Urbana–Champaign.

After completing his doctorate in 1977, he held a faculty position at Rensselaer Polytechnic Institute before returning to the Illinois Institute of Technology. He later joined Drexel University, where he has served as a faculty member in environmental engineering.

In 2018, he received the A. P. Black Research Award from the American Water Works Association for research contributions to water science and engineering.

In 2021, Haas was elected to the United States National Academy of Engineering.

Selected works Haas has authored and co-authored publications on microbial dose–response modeling, drinking water risk assessment, and quantitative methods in environmental engineering. His work includes contributions to the development of QMRA frameworks used in water quality regulation and risk management.