Although geothermal heat pumps can be used almost anywhere, most direct-use and electrical production facilities in the United States are located in the west, where the geothermal resource base is concentrated.
Current drilling technology limits the development of geothermal resources to relatively shallow water- or steam-filled reservoirs, most of which are found in the western part of the United States. But researchers are developing new technologies for capturing the heat in deeper, "dry" rocks, which would support drilling almost anywhere.
This map shows the distribution of geothermal resources across the United States. If you have trouble accessing this information because of a disability, please contact the Webmaster.