World Power Plants

Geothermal 1110 MW Geothermal

GeothermalRenewableVerified: Jul 2026

Geothermal 1 is a 110 MW geothermal power plant located in California, United States, operated by Northern California Power Agency since its commissioning in 1983. The facility generates electricity from geothermal sources, contributing to the state's renewable energy portfolio. It ranks as the 3rd largest geothermal plant in the United States. With a capacity of 110 MW, it represents 2.83% of the total geothermal capacity of 3,889 MW in the country. The United States has 65 geothermal plants with a combined capacity of 3,889 MW. In comparison to the largest geothermal plant, Geysers Unit 5-20 at 1,163 MW, Geothermal 1 is roughly 9.5% the size. Geothermal energy is an important part of California's renewable energy strategy, supplying around 5% of the state's electricity needs. The region's geological conditions are ideal for geothermal energy extraction, allowing for significant development. Geothermal 1 is located approximately 80 miles north of San Francisco in the Sonoma County area.

Capacity
110 MW
Commissioning Year
1983

43 years old

Owner
Northern California Power Agny
Location
38.7520°, -122.7195°

United States of America, North America

Context & rankings
  • 2,008. largest of 10,098 plants in United States of America
  • #9,608 worldwide by installed capacity
  • #39 of 215 Geothermal plants worldwide
  • 0.01% of the installed capacity of United States of America
Age & fleet comparison

43 years in operation

Geothermal fleet average: 26.9 years

Operator portfolio

Northern California Power Agny operates 8 plants totalling 900 MW

Regional density

81 plants within 100 km, 4,441 MW combined

Nearest plant: Geothermal 2 (0.7 km)

Location

Coordinates:: 38.752000, -122.719500
Open in Google Maps
Carbon Footprint

Zero Direct Emissions

Geothermal 1 is a geothermal power plant producing approximately 771 GWh of clean electricity per year with zero direct CO₂ emissions during operation.

Lifecycle emissions: ~38 g CO₂/kWh (manufacturing, transport, decommissioning)

Technical Details

Primary Fuel Type
Geothermal
Energy Source
Renewable
Country
United States of America
Continent
North America
Data Source
Global Power Plant Database

United States of AmericaEnergy Profile

10,098
Total Plants
1420.7 GW
Total Capacity
GasCoalNuclearWind
Top Fuels

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