If technological and regulatory hurdles are eased, EGS could transform geothermal from a niche baseload source into a scalable contributor to clean energy goals, especially in areas lacking conventional reservoirs. Geographic Concentration and Leading States The vast majority of geothermal electricity in the United States comes from a handful of western states where reservoirs of hot water and steam are close to the surface.
State Level Geothermal Usage Across the US
These direct uses are more distributed and less tracked than centralized power plants, meaning the true share of geothermal in heating and industrial sectors is dispersed across many small installations. In the electric sector, geothermal supplies closer to 0.
Nevada adds significant capacity, alongside smaller but important contributions from Oregon, Utah, and Hawaii. When assessing what percent of geothermal energy is used in the US by state, these five regions account for the overwhelming majority of production, with the rest scattered across Idaho and other geologically favorable areas.
Geothermal Usage by State: A Closer Look at US Distribution
California dominates the landscape, hosting the largest geothermal fields in the Salton Sea and Northern California regions, contributing the bulk of the state’s geothermal output. Beyond electricity, direct-use applications capture a smaller fraction of what percent of geothermal energy is used in the US for district heating, greenhouse operations, industrial processes, and geothermal heat pumps.
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