Lava Hot Springs is located along the Portneuf River in central Bannock County in southeastern Idaho. A small resort community of 700 people, Lava Hot Springs has a long history of geothermal water production and usage. The geothermal resources of the area have been utilized for health and recreation purposes for decades. The temperature of geothermal waters in Lava Hot Springs (70°F to 140°F) indicates the resources could be utilized for space heat, and the city of Lava Hot Springs is exploring the idea of a district heating system