John C. Holz, Ph.D.

Owner / Limnologist

Dr. Holz has over 20 years of experience in surface water quality/aquatic habitat management and research.  While earning his Ph.D. from the University of Nebraska-Lincoln (UNL), Dr. Holz’s research advanced our understanding of water resource issues and developed improved management tools for lakes, streams and watersheds, including assessing and predicting the response of water bodies to pollutants and the effectiveness of restoration techniques.  Dr. Holz conducted research that advanced our ability to address numerous unique water quality challenges and pollutant effects.

Specific areas of expertise include lake restoration and management, watershed management, biological indicators of water quality, phytoplankton ecology and management, nutrient inactivation (alum), determination of appropriate water quality goals, nutrient criteria development, water quality monitoring, water quality modeling, internal phosphorus loading, and determining effectiveness of TMDL’s using water quality and biological information.

Dr. Holz was honored for his alum research advancements by the North American Lake Management Society when he received their Technical Excellence Award in recognition for Outstanding Research in Lake Restoration, Protection and Management.

As a faculty member at UNL, Dr. Holz obtained over $8 million in funding to support water quality research, authored over 20 publications, taught courses in Limnology (the study of lakes and streams) and Lake and Reservoir Restoration, and served as a technical advisor to the U.S. Environmental Protection Agency (EPA) on water quality management issues in the U.S.  Dr. Holz is a recognized leader in water quality/aquatic habitat management.