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Geothermal Maps

These maps show existing and developing geothermal power plants, geothermal resource potential estimates, and other information related to geothermal power. They are updated as information becomes available, but may not represent all available geothermal data.

Resource Potential

The geothermal resource potential map (JPG 1.6 MB) for the United States shows locations of identified hydrothermal sites and favorability of deep enhanced geothermal systems (EGS). The map does not include shallow EGS resources located near hydrothermal sitesMap of Geothermal Resources in the United States or U.S. Geological Survey (USGS) assessment of undiscovered hydrothermal resources. The map was created by NREL using data provided by the Southern Methodist University Geothermal Laboratory and NREL analyses for regions with temperatures equal to or greater than 150°C. Source data for identified hydrothermal sites is from National Geothermal Resources Fact Sheet. (Temperature-at-depth data for deep EGS in Alaska and Hawaii not available.)

Power Generation

Map of Geothermal Power Generation in the United States

This geothermal map (JPG .90 MB) shows current and planned power generation capacity by state. Data are from the Geothermal Energy Association (GEA) (as of February 2013). The numbers for "planned" generation include projects in Phases 1-4 of development and unconfirmed projects. Total installed capacity is 3,386 MW, and total planned capacity is 2,511 to 2,606 MW.

Operating and Developing Power Plants

Developing Capacity Hydrothermal 2012 09 10 Stand Alone Operating Hydrothermal 2012 09 10 Stand Alone

These maps (Operating Hydrothermal JPG 1.22 MB) (Developing Capacity Hydrothermal JPG 1.15 MB) show geothermal power plants that are currently operating, as well as planned geothermal power plant projects according to a database compiled by SNL Energy from the GEA and other sources, and are up-to-date as of August of 2012. The maps also show undiscovered hydrothermal resource potential as estimated by the United States Geological Survey in their National Geothermal Resources Fact Sheet published in 2008.

For more geothermal information, access U.S. Department of Energy's Geothermal Technologies Program, U.S. Geological Survey's Energy Resource Program, or Southern Methodist University Geothermal Laboratory.

For Geographic Information System (GIS) geothermal resource data, access the Data Resources page.

For interactive maps and tools for viewing maps and data, access the Data Visualization and Tools page.

If you have difficulty accessing these maps because of a disability, please contact the Webmaster.