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Preliminary 2025 facility recordOperating

Waterford, CT · EIA plant 566

Millstone

Millstone is a nuclear power facility in Waterford, CT, with 2,260 MW of operating capacity.

Open on mapView CT profileOpen EIA source
Operating capacity2,260 MW2 operating generators
Proposed capacity0 MW0 proposed generators
UtilityDominion Energy Nuclear Conn IncEIA-reported operator
Balancing authorityISNEISO New England Inc.

Capacity profile

Fuel and technology

Nameplate capacity
Operating
Nuclear2,260 MW
ProposedNo proposed capacity reported
Reported technologiesNuclear

Nearby in CT

Related facilities

CT · 3.7 miYale New Haven - New London2 MW →CT · 4.8 miPfizer Groton Plant38 MW →CT · 5.3 miPfizer Groton Fuel Cell6 MW →CT · 5.7 miBridge Street 1 & 25 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