Committee Membership Information

Study Title:

On-site Reuse of Graywater and Stormwater: An Assessment of Risks, Costs, and Benefits

Study Director:

Dr. Richard G. Luthy - (Chair)
Stanford University

Richard G. Luthy (NAE) is the Silas H. Palmer Professor in the Department of Civil and Environmental Engineering, and Senior Fellow at the Woods Institute for the Environment at Stanford University. His area of teaching and research is environmental engineering and water quality with application to water reuse and management of contaminated sediments. He is the Director of the National Science Foundation?s Engineering Research Center for re-inventing the nation?s urban water infrastructure ( The Center is a collaboration among four universities that promotes more sustainable solutions to urban water challenges. His work includes study of persistent and bio-accumulative contaminants and emerging contaminants. Professor Luthy is a past chair of the National Research Council's Water Science and Technology Board and he has served on various NRC committees. He is a former President of the Association of Environmental Engineering and Science Professors. He is a registered professional engineer, a Board Certified Environmental Engineer, Water Environment Foundation Fellow, and a member of the National Academy of Engineering. He received a B.S. degree in chemical engineering from the University of California, Berkeley, a M.S. degree in ocean engineering from the University of Hawai?i at Manoa, and M.S. and Ph. D. degrees in environmental engineering from the University of California, Berkeley.

Mr. Benjamin Grumbles
U.S. Water Alliance

Ben Grumbles is President of the U.S. Water Alliance, where he works to unite people and policies for water sustainability throughout the country. Prior to joining the Water Alliance, Mr. Grumbles led Arizona?s Department of Environmental Quality working on air quality and climate change, energy policy and waste management, water efficiency, and wastewater recycling. Regional priorities in this effort included protecting the Grand Canyon, Colorado River, and Arizona-Mexico border environment. Mr. Grumbles served as Assistant Administrator for Water at the U.S. EPA from 2004 through 2008. He launched the EPA?s water efficiency labeling program, WaterSense, and initiatives on green infrastructure, water and climate change, and pharmaceuticals. He carried out and defended the nation?s clean water, drinking water, ocean and coastal, and wetlands laws and worked on great waterbody collaborations from coast to coast. Mr. Grumbles has NRC experience, currently serving as a member of the Water Science and Technology Board. He received his B.A. degree from Wake Forest University, a Masters degree in environmental law from George Washington U. Law School, and a J.D. degree from Emory University Law School.

Dr. Robert E. Pitt
University of Alabama

Robert E. Pitt is the Cudworth Professor of Urban Water Systems in the School of Engineering at the University of Alabama, Tuscaloosa. His major area of interest is in stormwater management, especially the integration of drainage and water quality objectives associated with green infrastructure and combined sewers, development of stormwater treatment systems at critical source areas, system modeling or urban water systems, and the beneficial uses of stormwater. His research has also examined stormwater effects on groundwater. He is a member of the American Society of Civil Engineers and the American Water Resources Association, and has served as a member of the NRC Committee on Reducing Stormwater Discharge Contributions to Water Pollution and the Groundwater Recharge Committee. He received his B.S. degree in engineering science from Humboldt State University, his M.S. degree in civil engineering from San Jose State University, and his Ph.D. degree in civil and environmental engineering from the University of Wisconsin.

Dr. Marylynn V. Yates
University of California, Riverside

Marylynn V. Yates is a professor of environmental microbiology at the University of California, Riverside. Dr. Yates conducts research in the area of water and wastewater microbiology. Her research focuses on assessing the potential for the contamination of water by human pathogenic microorganisms. As the intentional use of reclaimed water and biosolids (which may contain pathogenic microorganisms) increases, it is necessary to understand the potential impacts of these practices on public health. Dr. Yates has NRC experience, currently serving as a member of the Water Science and Technology Board. She received her B.S. in nursing from the University of Wisconsin, her M.S. degree in chemistry from the New Mexico Institute of Mining and Technology, and her Ph.D. degree in microbiology and immunology from the University of Arizona.

Mr. Richard W. Atwater
Southern California Water Committee

Richard W. Atwater is the executive director of the Southern California Water Committee, a non-profit public education and outreach focused on solving the water problems of southern California. Mr. Atwater has over thirty-five years experience in water resources management and development in the western U.S., and has pioneered many award-winning water projects and implemented numerous innovative water resource management programs. Prior to joining the SCWC, he served as the CEO and GM of the Inland Empire Utilities Agency, an agency that provides wholesale water and wastewater utility services to over 850,000 customers. Throughout his career Mr. Atwater has accumulated extensive public agency management experience in directing the development of some of the largest water projects in the United States. This includes the water recycling program for the West and Central Basin Municipal Water Districts in California, which at the time was the largest in the country. He is the recipient of the Conservation Service Award, the highest citizen award for resources management, and has participated in policy formulation workshops and expert panels for the National Academy of Sciences, Western Governors Association, Western Water States Council, and the National Water Research Institute. Mr. Atwater received his B.S. degree in geology and environmental science from Stanford University and his M.P.L. degree in urban and regional planning from the University of Southern California.

Dr. Jorg E. Drewes
Technical University of Munich

Jorg Drewes is chair professor for urban water systems engineering at Technical University of Munich, and is a professor emeritus and research professor at the Colorado School of Mines. He brings extensive knowledge and experience with graywater systems in Germany. His research interests focus on water and wastewater treatment engineering and potable and non-potable water reuse. In particular, he focuses on technologies leading to indirect potable reuse (soil-aquifer treatment vs. microfiltration/reverse osmosis); beneficial reuse of produced water during natural gas exploration; desalination and concentrate volume minimization; state-of-the-art characterization of natural and effluent organic matter; fate and transport of emerging contaminants (such as endocrine disrupting compounds, pharmaceutical residues and household chemicals) in natural and engineered systems as well as the rejection mechanisms of organic micropollutants in high-pressure membranes. Dr. Drewes received his B.S., M.S., and Ph.D. degrees in environmental engineering from the Technical University of Berlin.

Dr. Robert S. Raucher
Stratus Consulting

Bob Raucher is a founding partner and principal at Stratus Consulting. He specializes in economics, risk management, strategic planning, and regulatory policy analysis related to water utilities, water resources, and environmental quality. He is a noted expert on water resources management, benefit-cost analysis and water-related valuation issues, regulatory policy, and climate change-related vulnerability assessment and adaptation strategies for water resource management. Dr. Raucher has been involved in desalination and water reuse planning and implementation issues, and is actively engaged in research assessing reliability values associated with water supply portfolio diversification through desal and other ?new? water options that offer drought-resistant yields. Dr. Raucher is an active member of the water supply and wastewater community, serving on numerous expert panels and committees, including three workgroups for the National Drinking Water Advisory Council, and he is a member of the WateReuse Foundation?s Research Advisory Committee. He received a B.A. degree in economics and anthropology, a M.S. degree in econometrics, and a Ph.D. degree in natural resource economics and public finance.

Dr. Sybil Sharvelle
Colorado State University

Sybil Sharvelle is an assistant professor in the Department of Civil and Environmental Engineering at Colorado State University. Her research interests focus on wastewater and graywater reuse; biological process engineering; conversion of waste to energy; and integrated urban water management. Dr. Sharvelle is also a member of the CSU Sustainable Urban Water Research Working Group, where she works to address new and innovative infrastructure design concepts in water management through a multidisciplinary approach both in the U.S. and abroad. She received her B.S. and M.S. degrees in civil engineering from the University of Colorado and while pursuing her M.S. degree, Dr. Sharvelle optimized the nitrification and denitrification steps in a biological processor for treatment of wastewater highly concentrated with ammonia. Dr. Sharvelle also received a Ph.D. degree from Purdue University, where her research involved design and optimization of a biotrickling filter for simultaneous treatment of graywater and waste gas. A major component of this research effort was to examine the fate of surfactants in the biotrickling filter.

Dr. Glen T. Daigger
CH2M Hill, Inc.

Glenn T. Daigger (NAE) is Senior Vice President with CH2M HILL in Englewood, Colorado. He serves as Chief Wastewater Process Engineer and is responsible for wastewater process engineering on both municipal and industrial wastewater treatment projects on a firmwide basis. Dr. Daigger is the first Technical Fellow for the firm, an honor which recognizes the leadership he provides for CH2M HILL and for the profession in development and implementation of new wastewater treatment technology. He is also the Chief Technology Officer for the firm?s Civil Infrastructure Client Group, which includes the firm?s water, transportation, and operations businesses. From 1994-1996, Dr. Daigger served as Professor and Chair of the Department of Environmental Systems Engineering at Clemson University. Dr. Daigger is a registered professional engineer in the states of Indiana and Arizona, and a board certified environmental engineer. He also has NRC experience, having recently served as chair of the Committee to Review EPA's Economic Analysis of Final Water Quality Standards for Nutrients for Lakes and Flowing Waters in Florida. Dr. Daigger received his B.Sc.E. degree, his M.S.C.E. degree, and his Ph.D. degree, all in environmental engineering, from Purdue University.

Mr. Marcus M. Quigley
Geosyntec Consultants

Marcus M. Quigley is a principal civil and environmental engineer at Geosyntec Consultants. His work focuses on surface water hydrology, hydraulics, water quality, and stormwater and erosion and sediment control permitting and management. He is recognized as a national technical leader in stormwater best management practice (BMP) design, research and development, modeling, data analysis, and field data acquisition. Mr. Quigley has extensive experience in the execution and management of major compliance auditing and litigation support projects. He also is managing and directing major nationwide NPDES compliance audit programs for private clients. He has been the lead designer for a number of conventional and low impact development (LID) controls systems, and has directed groundbreaking monitoring work to demonstrate the effectiveness of LID. Mr. Quigley regularly conducts and directs complex surface water quantity and quality modeling efforts, and during the past 10 years he has provided technical leadership and project management for the International Stormwater Best Management Practices Database project. He received his B.S. degree in environmental engineering from the University of Notre Dame and his M.S. degree in civil and environmental engineering from Oregon State University.

Dr. Claire Welty
University of Maryland Baltimore County

Claire Welty is a professor of civil and environmental engineering and director of the Center for Urban Environmental Research and Education at the University of Maryland, Baltimore County. Her research is focused on developing an end-to-end system of field-deployed sensors and fully coupled groundwater-surface water mathematical models to quantify and predict the urban hydrologic cycle and coupled biogeochemical cycles from neighborhood to regional scales. Her goal is to be able to assimilate sensor data into hydrologic and water quality models in near-real time for predicting flow paths, fluxes and stores of water and chemicals on land surfaces and in the subsurface. Dr. Welty has NRC experience, having served on a number of committees and as chair of the Water Science and Technology Board. She received her B.A. degree in environmental sciences from the University of Virginia, her M.S. degree in environmental engineering from the George Washington University, and he Ph.D. degree in civil engineering from the Massachusetts Institute of Technology.

Dr. Arpad Horvath
University of California, Berkeley

Arpad Horvath is a professor of Civil and Environmental Engineering at the University of California, Berkeley. He heads the Energy, Civil Infrastructure and Climate graduate program, and is the Director of UC Berkeley?s Consortium on Green Design and Manufacturing and also the Director of UC Berkeley?s Engineering and Business for Sustainability Certificate Program. His research focuses on developing models for life-cycle environmental and economic assessment of products, processes, and services, particularly of civil infrastructure systems. He has worked the environmental implications of transportation systems, buildings, construction, water and wastewater systems, and various service industries. Professor Horvath is a member of the Environmental Engineering Committee of the U.S. Environmental Protection Agency?s Science Advisory Board, as well as the EPA?s Scientific and Technological Achievement Awards Committee. He is Associate Editor of the Journal of Infrastructure Systems, and is on the editorial boards of Environmental Science & Technology, Environmental Research Letters, and the Journal of Industrial Ecology. Dr. Horvath was Conference Chair of the 6th International Conference on Industrial Ecology in 2011. He is a recipient of the American Society of Civil Engineers? Walter L. Huber Civil Engineering Research Prize, the Laudise Prize ?for outstanding achievements in industrial ecology by a young scientist or engineer? of the International Society for Industrial Ecology, and the Excellence in Review Award from Environmental Science & Technology. Three of his co-authored papers have been named among the top three papers in Environmental Science & Technology in 2008, 2011, and 2012. He received a Dipl. Eng. (M.S.) degree in civil engineering from the Technical University of Budapest, and M.S. and Ph.D. degrees in civil and environmental engineering from Carnegie Mellon University.