The Geysers
Middletown, California, United States
About
Founded in 1960, The Geysers is a private headquartered in Middletown, United States specializing in Geothermal.
The Geysers is a geothermal power facility located in the Mayacamas Mountains north of San Francisco, California. It represents the world's largest complex of geothermal power plants with 13 interconnected plants operated by Calpine. The facility harnesses naturally occurring dry superheated steam from deep underground reservoirs (approximately four miles below the surface) to drive turbines and generate electricity. The facility supplies power to multiple Northern California counties including Sonoma, Lake, Mendocino, Marin, and Napa. A key innovation is the integration of two recycled water recharge projects: the Southeast Geysers Effluent Pipeline (operational since 1997) and the Santa Rosa Geysers Recharge Project (completed 2003), which deliver treated wastewater to maintain reservoir pressure and sustain long-term productivity. These partnerships exemplify sustainable resource management by transforming waste streams into renewable energy while providing environmental benefits to surrounding communities.
Headquarters
Middletown, United States
Founded
1960
Company Type
Private
Business Models
Value Chain
Service Regions
Sonoma County, Lake County, Mendocino County, Marin County, Napa County