Dennis Helsel, Ph.D.

Dennis Helsel, PhD has 32 years experience applying statistics to practical issues in environmental sciences. He is the owner and lead scientist of Practical Stats, an environmental statistics training and consulting firm. He is the lead author of two textbooks, Statistical Methods in Water Resources (USGS, 2002), and Nondetects And Data Analysis: Statistics for Censored Environmental Data (Wiley, 2005), as well chapters in two handbooks and over 50 journal articles.

Dr. Helsel was a 2003 recipient of the Distinguished Achievement Award from the American Statistical Association's section on Statistics and the Environment, and of the Dept. of Interior's Distinguished Service Award in 2007. He has been invited to conduct training classes on environmental statistics to the Chinese Ministry of Water Resources; to the Umweltbundesamt (German Environment Agency); to students at the Helsinki University of Technology, Finland; and in the United States through the American Statistical Association.