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2017 NWRI Clarke Prize Conference


"Research and Innovations in Urban Water Sustainability"


Click here to Download the 2017 Clarke Prize Lecture:


A Biologist to Engineers, and an Engineer to Biologists (PDF 4.00 MB)



Click here to download a PDF of the Clarke Prize Conference Program.

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Conference Presentations and Videos (PDFs of PowerPoint Slides)


To download PDFs of the slides please click on their respective links below. 

Conference Welcome


Kevin Hardy, Executive Director, National Water Research Institute


Session 1:  A Clarke Prize Laureate's Perspective on the 2017 Clarke Prize Lecture Topic


Joan Rose, Ph.D., Michigan State University



Session 2: The Acute Threat: Perspectives on Pathogens in Potable Reuse


Brian Pecson, Ph.D., P.E., Trussell Technologies, Inc.



Session 3: Enhanced Source Control to Support Potable Reuse


James Colston, J.D., Orange County Sanitation District



Session 4: Pathogen Removal Mechanisms and Pathogen Credits in Membrane Bioreactor-Based Potable Reuse Trains


Ufuk Erdal, Ph.D., P.E., AECOM



Session 5: Assessing and Mitigating Chemicals in Potable Reuse


Andrew Salveson, P.E., Carollo Engineers


Session 6: The Relevance of Low Molecular Weight Compounds on Monitoring for Direct Potable Reuse


Jeff Neemann, D.Eng., P.E., Black & Veatch



Session 7: The Water Environment & Reuse Foundation's Activities to Advance Potable Reuse


Jeffrey J. Mosher, Water Environment & Reuse Foundation


Session 8: Emerging Issues to Achieve Microbially Safe and Sustainable Water

Charles N. Haas, Ph.D., of Drexel University received the 2017 Clarke Prize for excellence in water research

Mark Sobsey, University of North Carolina, Chapel Hill





2017 Clarke Prize Lecture:

A Biologist to Engineers, and an Engineer to Biologists

Charles N. Haas, Ph.D., Drexel University







About the Conference


The 2017 NWRI Clarke Prize Conference brought together scientists and experts from across the water community to discuss the most innovative research and technology developments happening today in urban water sustainability.


Held on October 20, 2017, in Irvine, California, the conference featured presentations by the NWRI Clarke Prize Laureates, representatives from local water and wastewater utilities, and academics from various universities. The talks focused on managing and advancing sustainable water treatment technologies.


The result was an extended discussion on water resources that included theoretical concepts, basic science research, practical applications, and case studies. The highlight of the event was the Clarke Prize Award Ceremony and Lecture in honor of Charles N. Haas, Ph.D., the LD Betz Professor of Environmental Engineering and Head of the Department of Civil, Architectural, and Environmental Engineering at Drexel University in Philadelphia, Pennsylvania, and the twenty-fourth recipient of the NWRI Athalie Richardson Irvine Clarke Prize for excellence in water research.


Trained in both engineering and microbiology, Haas used his cross-disciplinary education to explore the disinfection and inactivation of pathogens in water since receiving a doctorate in Environmental Engineering from the University of Illinois at Urbana-Champaign in 1978.  At that time, public health agencies and regulators did not have a practical or effective scientific method to inform whether treatment processes were adequately eliminating the risk of exposing the public to pathogens in municipal water supplies.  They instead relied on limited approaches, such as testing water for indicators of such contamination and/or the absence of reported waterborne disease outbreaks, to determine that water treatment plants were achieving their goals in reducing or eliminating pathogens.


More than 120 people attended the conference, representing universities, consulting firms, government agencies, manufacturing firms, water and wastewater utilities, and others.


Clarke Prize Supporters


The Clarke Prize Conference would not be possible without the support of our NWRI Member Agencies, Corporate Associates, and Clarke Prize Sponsors.  We gratefully recognize:


Julian Villa and Serge Haddad of Los Angeles Water and Power (LADWP) chat during a break between water science presentations. From 2016.

NWRI Member Agencies



NWRI Corporate Associates

Conference Planning Committee





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