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Geothermal Resources

Geothermal Alliance of Illinois

Find information, incentives and a qualified contractor/installer for geothermal heating and cooling in Illinois.

Geothermal Energy Association

The Geothermal Energy Association is composed of U.S. companies who support the expanded use of geothermal energy and are developing geothermal resources worldwide. The site has basic information about geothermal energy as well as a free searchable database of geothermal vendors, suppliers, contractors, energy producers and associations.

Geothermal Technologies Program

This site has geothermal information from the U.S. Department of Energy. This program works in partnership with industry to establish geothermal energy as an economically competitive contributor to the U.S. energy supply. The site explains how geothermal energy works and provides many additional geothermal energy resources.

International Ground Source Heat Pump Association

Advances geothermal heat pump (GHP) technology on local, state, national and international levels.