Connecticut
power plants.
Connecticut has 67 operating power plants in the catalog, 9,934 MW in all. The catalog also marks 1 plant as Retired, with 71 MW of capacity. Its operating fleet leans on natural gas, which accounts for 52.6% of operating capacity, with nuclear second at 22.1%. The largest operating plant in the catalog is Millstone Nuclear Power Plant (2,198 MW, recorded start year 1975).
Source: Global Energy Monitor, Global Integrated Power Tracker, March 2026 release II. Catalog content date: .
Source: Global Energy Monitor, Global Integrated Power Tracker, March 2026 release II. Catalog content date: .
Connecticut electricity mix
Operating installed capacity by fuel. Each row gives megawatts and its share of the operating total.
Source: Global Energy Monitor, Global Integrated Power Tracker, March 2026 release II. Catalog content date: .
Largest plants in Connecticut
Source: Global Energy Monitor, Global Integrated Power Tracker, March 2026 release II. Catalog content date: .
Newest plants in Connecticut
Operating plants with the most recent recorded start years. The catalog records years, not full commissioning dates.
Source: Global Energy Monitor, Global Integrated Power Tracker, March 2026 release II. Catalog content date: .
Frequently asked questions
Where does Connecticut get its electricity?
Across the 67 operating plants in the catalog, capacity is led by natural gas at 52.6%, then nuclear at 22.1%. These are installed-capacity shares, not live generation.
What is the largest power plant in Connecticut?
The largest operating plant in the catalog for Connecticut is Millstone Nuclear Power Plant, a nuclear facility with 2,198 MW and a recorded start year of 1975.
How many power plants are in Connecticut?
The catalog tracks 67 operating power plants in Connecticut, with 9,934 MW in all. It also marks 1 plant as Retired, with 71 MW of capacity.