Geothermal 1
Geothermal power plant in Sonoma County, California. 110 MW of nameplate capacity across 2 generators, operated by Northern California Power Agny.
Also known as EIA plant 7368
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 110 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- January 1983First generator online
- Operator
- Northern California Power AgnyEIA operator ID 40613
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 2 CAISO nodesResource nodes with prices
- Location
- Sonoma County, CA38.7520, −122.7195
- EIA plant ID
- 7368EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Geothermal 1 produces
Free · EIA-923Net generation, 2025
338 GWh
338,449 MWh, final
Capacity factor, 2025
35.1%
2024: 28.8%
January to July 2026
175 GWh
Provisional
Range, 2015 to 2025
278.2–488.0
GWh a year. Low 2024, high 2022
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | Not reported | Not reported | 0 of 12 |
| 2002 | 599,793 | Not reported | 12 of 12 |
| 2003 | 534,138 | Not reported | 12 of 12 |
| 2004 | 531,756 | Not reported | 12 of 12 |
| 2005 | 525,531 | Not reported | 12 of 12 |
| 2006 | 522,648 | Not reported | 12 of 12 |
| 2007 | 506,448 | Not reported | 12 of 12 |
| 2008 | 490,544 | Not reported | 12 of 12 |
| 2009 | 471,127 | Not reported | 12 of 12 |
| 2010 | 453,486 | 47.1% | 12 of 12 |
| 2011 | 435,678 | 45.2% | 12 of 12 |
| 2012 | 458,243 | 47.4% | 12 of 12 |
| 2013 | 388,677 | Not reported | 12 of 12 |
| 2014 | 469,471 | 48.7% | 12 of 12 |
| 2015 | 460,762 | 47.8% | 12 of 12 |
| 2016 | 475,231 | 49.2% | 12 of 12 |
| 2017 | 415,905 | 43.2% | 12 of 12 |
| 2018 | 433,936 | 45.0% | 12 of 12 |
| 2019 | 324,594 | 33.7% | 12 of 12 |
| 2020 | 454,584 | 47.0% | 12 of 12 |
| 2021 | 481,441 | 50.0% | 12 of 12 |
| 2022 | 487,956 | 50.6% | 12 of 12 |
| 2023 | 334,834 | 34.7% | 12 of 12 |
| 2024 | 278,171 | 28.8% | 12 of 12 |
| 2025 | 338,449 | 35.1% | 12 of 12 |
| 2026 (provisional, partial year) | 174,889 | 31.2% | 7 of 7 |
* 2026 covers January to July and is provisional. Capacity factor is net generation divided by nameplate capacity times the hours of each reported month.
Power prices and basis
Free account · CAISOEmissions
Free · EPA CAMPDNo EPA emissions units are linked to this plant.
Water use
Free · EIA-923 cooling, USGSNo EIA cooling-water record for this plant in 2024.
Generators
Free · EIA-860M| Generator | Technology | Nameplate MW | Online since |
|---|---|---|---|
| 1 | Geothermal | 55.0 | January 1983 |
| 2 | Geothermal | 55.0 | January 1983 |
Ownership and offtake
ProOwnership and offtake are part of Pro
Owners and their shares, parent companies, and power purchase agreements with their buyers. EIA-860M lists Northern California Power Agny as the operator, which is not always the owner.
Modeled data
ProPro adds modeled values for this plant. Everything above stays free.
Generation potential vs reported
Monthly potential at seasonal net capability, next to EIA-923 output. Shows how much of the plant's capability was used.
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Power plants near Geothermal 1
More plants operated by Northern California Power Agny
Questions about Geothermal 1
How much power does Geothermal 1 produce?
Geothermal 1 reported 338,449 MWh (338 GWh) of net generation in 2025, a 35.1% capacity factor on 110 MW of nameplate capacity. From January to July 2026 it reported 175 GWh, which is provisional.
Where is Geothermal 1?
Geothermal 1 is in Sonoma County, California, at 38.7520, −122.7195. It is in the California Independent System Operator balancing area (CISO).
Who operates Geothermal 1?
EIA-860M for August 2026 lists Northern California Power Agny as the operator (EIA operator ID 40613). The operator is not always the owner.
When did Geothermal 1 start operating?
Its first generator began operating in January 1983, according to EIA-860M.
Does InfraMap have power prices for Geothermal 1?
Yes. InfraMap has CAISO day-ahead and real-time prices at 2 price nodes linked to Geothermal 1, with the hub price and node-to-hub basis. Prices are free with an InfraMap account; pricing node names are part of InfraMap Pro.
Sources
- EIA-860 2025 (final) and EIA-860M August 2026: plant, generators, capacity, operator and location
- EIA-923 monthly net generation, 2000 to July 2026 (2026 provisional)
- CAISO day-ahead and real-time prices; node and hub assignments as of 2026-10-05
Page updated 2026-10-04 from the InfraMap data build. Methodology · Data sources · EIA plant page