Partners

• Northern California Power Agency (NCPA) - NCPA is a joint powers agency that purchases, generates, distributes, and sells electrical energy. Its members include 11 municipalities, one irrigation district, one public utility district, one port authority, and one rural electric cooperative. At the Geysers, effluent is being injected in NCPA's steamfield that serves its two power plants.

• Calpine Corporation - Calpine is an investor-owned corporation that provides integrated power services, including construction, fuel supply, operations, and marketing. Calpine owns interests in power plants and geothermal steamfields worldwide. At the Geysers, effluent is being injected in steamfields that serve 19 power plants operated by Calpine.