A recent Geothermal Energy Association report claims that “the total number of geothermal projects-under-development, as well as geothermal prospects, reported in 2011 increased 12% over 2010.” Among the types of geothermal projects tracked by the report are (i) conventional hydrothermal (un-produced resource), (ii) conventional hydrothermal (produced resource), (iii) conventional hydrothermal expansion, (iv) geothermal energy and hydrocarbon co-production, (v) geopressured systems, and (vi) enhanced geothermal systems.

The new projects identified in the report are under development in Alaska, Arizona, California, Colorado, Hawaii, Idaho, Louisiana, Mississippi, New Mexico, Nevada, Oregon, Texas, Utah, Washington, and Wyoming. According to the report, 3,102 megawatts of geothermal power are currently being produced in nine states with plans under way to develop another 5,000 megawatts in 15 states. Nevada, the state with the most projects, has 65 projects existing or planned.