Aidlin Geothermal Power Plant
Geothermal power plant in Sonoma County, California. 25 MW of nameplate capacity across 2 generators, operated by Geysers Power Co LLC.
Also known as EIA plant 52158
Analyst: free account, 1 question a day.
Key facts
- Capacity
- 25 MWNameplate
- Generators
- 2 operatingEIA-860M, August 2026
- Operating since
- May 1989First generator online
- Operator
- Geysers Power Co LLCEIA operator ID 7160
- Grid
- CAISOBalancing authority CISO
- Price nodes
- 1 CAISO nodeResource nodes with prices
- Location
- Sonoma County, CA38.8339, −122.8810
- EIA plant ID
- 52158EIA plant page
Data as of EIA-860M August 2026 (published 2026-09-24). Capacity is nameplate, not live output.
How much power Aidlin Geothermal produces
Free · EIA-923Net generation, 2025
82.4 GWh
82,366 MWh, final
Capacity factor, 2025
37.6%
2024: 37.0%
January to July 2026
Not reported
Provisional. 0 of 7 months reported
Range, 2015 to 2025
77.3–132.1
GWh a year. Low 2023, high 2015
| Year | Net generation, MWh | Capacity factor | Months reported |
|---|---|---|---|
| 2000 | Not reported | Not reported | 0 of 12 |
| 2001 | 141,725 | Not reported | 12 of 12 |
| 2002 | 137,125 | Not reported | 12 of 12 |
| 2003 | 130,947 | Not reported | 12 of 12 |
| 2004 | 122,914 | Not reported | 12 of 12 |
| 2005 | 107,350 | Not reported | 12 of 12 |
| 2006 | 136,454 | Not reported | 12 of 12 |
| 2007 | 146,205 | Not reported | 12 of 12 |
| 2008 | 136,980 | Not reported | 12 of 12 |
| 2009 | 144,098 | Not reported | 12 of 12 |
| 2010 | 148,961 | 68.0% | 12 of 12 |
| 2011 | 132,181 | 60.4% | 12 of 12 |
| 2012 | 119,471 | 54.4% | 12 of 12 |
| 2013 | 112,149 | 51.2% | 12 of 12 |
| 2014 | 139,692 | 63.8% | 12 of 12 |
| 2015 | 132,136 | 60.3% | 12 of 12 |
| 2016 | 125,286 | 57.1% | 12 of 12 |
| 2017 | 115,589 | 52.8% | 12 of 12 |
| 2018 | 114,165 | 52.1% | 12 of 12 |
| 2019 | 106,159 | 48.5% | 12 of 12 |
| 2020 | 105,059 | 47.8% | 12 of 12 |
| 2021 | 99,324 | 45.4% | 12 of 12 |
| 2022 | 84,895 | 38.8% | 12 of 12 |
| 2023 | 77,312 | 35.3% | 12 of 12 |
| 2024 | 81,307 | 37.0% | 12 of 12 |
| 2025 | 82,366 | 37.6% | 12 of 12 |
| 2026 (provisional, partial year) | Not reported | Not reported | 0 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 |
|---|---|---|---|
| GEN1 | Geothermal | 12.5 | May 1989 |
| GEN2 | Geothermal | 12.5 | May 1989 |
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 Geysers Power Co LLC 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 Aidlin Geothermal
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Questions about Aidlin Geothermal
How much power does Aidlin Geothermal Power Plant produce?
Aidlin Geothermal Power Plant reported 82,366 MWh (82.4 GWh) of net generation in 2025, a 37.6% capacity factor on 25 MW of nameplate capacity.
Where is Aidlin Geothermal Power Plant?
Aidlin Geothermal Power Plant is in Sonoma County, California, at 38.8339, −122.8810. It is in the California Independent System Operator balancing area (CISO).
Who operates Aidlin Geothermal Power Plant?
EIA-860M for August 2026 lists Geysers Power Co LLC as the operator (EIA operator ID 7160). The operator is not always the owner.
When did Aidlin Geothermal Power Plant start operating?
Its first generator began operating in May 1989, according to EIA-860M.
Does InfraMap have power prices for Aidlin Geothermal Power Plant?
Yes. InfraMap has CAISO day-ahead and real-time prices at 1 price node linked to Aidlin Geothermal Power Plant, 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