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Preliminary 2025 facility recordOperating

Middletown, CA · EIA plant 50066

Calistoga Power Plant

Calistoga Power Plant is a geothermal power facility in Middletown, CA, with 176 MW of operating capacity.

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Operating capacity176 MW2 operating generators
Proposed capacity0 MW0 proposed generators
UtilityGeysers Power Co LLCEIA-reported operator
Balancing authorityCISOCalifornia Independent System Operator

Capacity profile

Fuel and technology

Nameplate capacity
Operating
Geothermal176 MW
ProposedNo proposed capacity reported
Reported technologiesGeothermal

Nearby in CA

Related facilities

CA · 0.7 miSonoma California Geothermal78 MW →CA · 0.8 miGeysers Unit 5-201,236 MW →CA · 1.2 miWest Ford Flat25 MW →CA · 2.8 miGeothermal 1110 MW →

Source quality

Preliminary facility data

This page uses the EIA-860 2025 Early Release. EIA identifies the release as preliminary, so it should not be used for official state or national aggregation. Capacity is nameplate capacity, not real-time output or annual generation.

Read methodologyEIA-860 source