Jay Lehr Jay H. Lehr, Ph.D., is the country's most frequently quoted authority on groundwater hydrology and hydrogeology. Additionally, he is a prolific author and the Senior Scientist at Environmental Education Enterprises (E3), one of the nations larges environmental short-course providers. Lehr served on the faculty of the University of Arizona and The Ohio State University, and was editor of the prestigious journal Ground Water, for 25 years. He played a significant role in the development of many of the United States primary environmental laws. Read More Read Less