MWPowerPlantFacts
PowerPlantFactsEvidence report · prepared 2 September 2026https://powerplantfacts.com/entity/510
EIA plant 510

Middletown · Lake · CA

Sonoma California Geothermal

Operated by Geysers Power Co LLC

Annual generation447,631 MWhSum of represented EIA-923 rows
Fuel codesGEOCodes retained from EIA records
Grid contextCalifornia Independent System OperatorBalancing authority or NERC region

Published location

Where is Sonoma California Geothermal?

This locator uses the coordinates in the approved source record. It shows geographic context, not a site boundary, safety zone or property-risk area.

38.790300, -122.755900

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Map data © OpenStreetMap contributors

Capacity is not generation. Nameplate MW describes equipment; annual MWh describes recorded output. Proposed and retired units are not added to operating capacity.

2024 monthly net generation

MonthNet generation
137,943 MWh
235,786 MWh
338,591 MWh
436,812 MWh
539,726 MWh
636,145 MWh
737,541 MWh
838,157 MWh
936,988 MWh
1037,000 MWh
1136,857 MWh
1236,085 MWh

Operating generators

IDTechnologyFuelMWStatus
1GeothermalGEO78OP

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Identity, technology and limitations
EIA plant ID
510
Sector
IPP Non-CHP
Water source
Wells
Data edition
2024-final