In this image, a helicopter towing a large, cylindrical sensor makes low-level flights as part of a USGS remote geophysical survey, which collects data about underground geology. The scientific system, called Resolve, is operated by CGG Canada Services, Ltd.
Gregory C. Delzer, Ph.D.
Greg's U.S. Geological Survey experience began working for both the Office of Water Quality and the National Water-Quality Assessment Program (NAWQA). As part of these efforts, he conducted numerous quality-control studies and coordinated national-scale water-quality studies. Greg currently enjoys working with a great staff focused on all aspects of the hydrologic cycle.
Notable highlights of Greg's career include: (1) co-developing recommendations for the development of a modern analytical facility for the Afghan Geological Survey; (2) presenting findings of organic contaminants in source and finished water of community water systems at a Congressional briefing and assisting in a related Congressional briefing; (3) the design, coordination, and reporting of results from a study conducted in cooperation with the American Water Works Association Research Foundation and the Metropolitan Water District of Southern California which monitored source water derived from groundwater, rivers, and reservoirs in 35 states and 120 community water systems; and (4) providing technical leadership, advice, and serving as lead or co-author of about 35 agency reports. Dr. Delzer was also the recipient of the Department of Interior Superior Service Award.
Education and Certifications
Bachelor of Science in Civil Engineering, Master of Science in Civil Engineering, and a Ph.D. in Atmospheric and Environmental Science; all from South Dakota School of Mines and Technology
Science and Products
Water Resources of the Energy Development Area of the Williston Basin in Eastern Montana, Western North Dakota, and Northwest South Dakota
Data to Estimate Water Use Associated with Continuous Oil and Gas Development, Williston Basin, United States, 1980-2017 (ver. 3.0, October 2022)
Delineation of the hydrogeologic framework of the Big Sioux aquifer near Sioux Falls, South Dakota, using airborne electromagnetic data
In this image, a helicopter towing a large, cylindrical sensor makes low-level flights as part of a USGS remote geophysical survey, which collects data about underground geology. The scientific system, called Resolve, is operated by CGG Canada Services, Ltd.
Research needs identified for potential effects of energy development activities on environmental resources of the Williston Basin, United States
Potential effects of energy development on environmental resources of the Williston Basin in Montana, North Dakota, and South Dakota—Water resources
Assessment of streamflow trends in the eastern Dakotas, water years 1960–2019
Estimates of water use associated with continuous oil and gas development in the Williston Basin, North Dakota and Montana, 2007–17
Analytical framework to estimate water use associated with continuous oil and gas development
Construction of a groundwater-flow model for the Big Sioux Aquifer using airborne electromagnetic methods, Sioux Falls, South Dakota
Estimating national water use associated with unconventional oil and gas development
Anthropogenic organic compounds in source water of select community water systems in the United States, 2002-10
Percent recoveries of anthropogenic organic compounds with and without the addition of ascorbic acid to preserve finished-water samples containing free chlorine, 2004-10
Concentration data for anthropogenic organic compounds in groundwater, surface water, and finished water of selected community water systems in the United States, 2002-10
Occurrence of volatile organic compounds in selected urban streams in the United States, 1995-2003
Anthropogenic organic compounds in source water of selected community water systems that use groundwater, 2002-05
Science and Products
Water Resources of the Energy Development Area of the Williston Basin in Eastern Montana, Western North Dakota, and Northwest South Dakota
Data to Estimate Water Use Associated with Continuous Oil and Gas Development, Williston Basin, United States, 1980-2017 (ver. 3.0, October 2022)
Delineation of the hydrogeologic framework of the Big Sioux aquifer near Sioux Falls, South Dakota, using airborne electromagnetic data
In this image, a helicopter towing a large, cylindrical sensor makes low-level flights as part of a USGS remote geophysical survey, which collects data about underground geology. The scientific system, called Resolve, is operated by CGG Canada Services, Ltd.
In this image, a helicopter towing a large, cylindrical sensor makes low-level flights as part of a USGS remote geophysical survey, which collects data about underground geology. The scientific system, called Resolve, is operated by CGG Canada Services, Ltd.