ASCE has honored Jerry E. Ongerth, Ph.D., P.E., F.ASCE, with the 2018 Rudolph Hering Medal for the paper “Cryptosporidium and Giardia in Water: Reassessment of Occurrence and Significance,” Journal of Environmental Engineering, March 2017.
In this nominated work, the author provides a state-of-the-art review of current approaches in the U.S. water industry for monitoring Cryptosporidium and Giardia, identifying weaknesses that have contributed to the difficulty of interpreting resulting data.
Ongerth’s paper summarizes information on which the conflicting conclusions on the occurrence and distribution of Cryptosporidium and Giardia have been based. Effort is made to determine the most plausible and supportable interpretation in order to provide a basis for rethinking the current approach to monitoring and management of Cryptosporidium and Giardia in water. The importance of measuring recovery efficiency and reporting measurements of these organisms in terms of concentration to any quantitative application is emphasized, while analysis of major data sets resulting from the U.S. Environmental Protection Agency Information Collection Rule Supplemental Survey (USEPA ICR SS) and the Long-Term 2 Enhanced Surface Water Treatment Rule (LT2) monitoring, and other previously published relevant data sets, is presented to illustrate key features of Cryptosporidium and Giardia occurrence in surface water and their universal geographic distribution.
The key conclusion of this work is that current methods for monitoring Cryptosporidium and Giardia emphatically require revision.
The Rudolph Hering Medal recognizes outstanding papers that contribute to the advancement of the environmental branch of the engineering profession.