Power plants and the grid in Connecticut
Connecticut has 185 power plants with 10.1 GW of capacity, natural gas the largest share at 4.6 GW. The map shows 17 data centers in Connecticut.
Capacity by fuel
185 power plants with 10.1 GW of capacity, planned generators left out.
- Natural gas: 4.6 GW from 47 plants (45%)
- Oil: 2.6 GW from 23 plants (26%)
- Nuclear: 2.1 GW from 1 plant (21%)
- Solar: 501 MW from 93 plants (5%)
- Biomass: 140 MW from 6 plants (1%)
- Hydro: 120 MW from 13 plants (1%)
- Pumped storage: 29 MW from 1 plant (under 1%)
- Wind: 5 MW from 1 plant (under 1%)
Largest plants
- Millstone: Nuclear, 2.1 GW
- Lake Road Generating Plant: Natural gas, 829 MW
- Middletown: Oil, 770 MW
- CPV Towantic Energy Center: Natural gas, 744 MW
- Kleen Energy Systems: Natural gas, 622 MW
- New Haven Steam: Oil, 562 MW
- Bridgeport Energy Project: Natural gas, 538 MW
- Milford Power Project: Natural gas, 510 MW
- Montville Station: Oil, 496 MW
- Bridgeport Station: Natural gas, 496 MW
Largest plants near Bridgeport
- CPV Towantic Energy Center: Natural gas, 744 MW, 34 km away
- New Haven Steam: Oil, 562 MW, 27 km away
- Bridgeport Energy Project: Natural gas, 538 MW, 2 km away
- Milford Power Project: Natural gas, 510 MW, 10 km away
- Bridgeport Station: Natural gas, 496 MW, 2 km away
Largest plants near Hartford
- Middletown: Oil, 770 MW, 26 km away
- CPV Towantic Energy Center: Natural gas, 744 MW, 49 km away
- Kleen Energy Systems: Natural gas, 622 MW, 25 km away
- Wallingford Energy: Natural gas, 318 MW, 38 km away
- GenConn Middletown LLC: Oil, 188 MW, 26 km away
Largest plants near New Haven
- Middletown: Oil, 770 MW, 37 km away
- CPV Towantic Energy Center: Natural gas, 744 MW, 25 km away
- Kleen Energy Systems: Natural gas, 622 MW, 35 km away
- New Haven Steam: Oil, 562 MW, 5 km away
- Bridgeport Energy Project: Natural gas, 538 MW, 30 km away
Largest plants near Stamford
- Bridgeport Energy Project: Natural gas, 538 MW, 32 km away
- Milford Power Project: Natural gas, 510 MW, 41 km away
- Bridgeport Station: Natural gas, 496 MW, 32 km away
- GenConn Devon LLC: Oil, 196 MW, 40 km away
- Devon Station: Oil, 132 MW, 40 km away
Planned and under construction
8 generators planned, under construction or testing, 625 MW in all, not counted above.
- Battery storage: 320 MW
- Solar: 305 MW
Grid operators
- ISO-NE (ISO or RTO): 185 plants
Data centers
17 data center sites on the map.
- Western Connecticut Planning Region: 8 sites
- Capitol Planning Region: 4 sites
- Naugatuck Valley Planning Region: 3 sites
- Operators with the most sites: CyrusOne (3), Atlas Capital Group (1), Carter Validus Mission Critical REIT (1), CenturyLink (1), ColoSpace (1), Data Ark Systems, LLC. (1), Digital Realty (1), Digital Realty Trust (1), nwiNetworks (1), SingleHop (1)
Sources
Power plants: EIA-860M (US); NRCan NACEI (Canada, Mexico); WRI GPPD (Mexico); OpenStreetMap via Geofabrik (Canada, Mexico gap fill); USGS USWTDB/USPVDB; EPA eGRID; Natural Earth admin-1; HIFLD control areas; location attributes from WorldPop (R2025A), Global Solar Atlas PVOUT, Global Wind Atlas 4, USFS Wildfire Hazard Potential, the USGS National Seismic Hazard Model and the previous publish's lines and substations; water distances from OpenStreetMap via Geofabrik; gas distances and county queue from the previous publish's EIA gas pipelines and LBNL Queued Up requests; nearest city from Natural Earth populated places; cooling degree days from NOAA NCEI nClimDiv county normals; elevation and slope from the Copernicus DEM GLO-30 (ESA, via AWS Open Data); water stress from WRI Aqueduct 4.0; ozone nonattainment from the EPA Green Book; drought from the U.S. Drought Monitor; tribal land from US Census TIGER/Line. License: ODbL (derivative database; EIA content is public domain, NRCan OGL-Canada, WRI GPPD CC BY 4.0; location attributes from WorldPop, Global Solar Atlas, Global Wind Atlas, LBNL Queued Up and WRI Aqueduct CC BY 4.0, USFS, USGS, EIA, NOAA, EPA, US Census and Natural Earth public domain, Copernicus DEM GLO-30 © DLR e.V. and Airbus Defence and Space GmbH, the U.S. Drought Monitor courtesy of NDMC)
Places gazetteer (cities, airports, regions): Natural Earth populated places; OurAirports; Natural Earth admin-1; Wattlas curated places. License: Public domain
Data centers: Epoch AI (CC BY); OpenStreetMap via the public Overpass API (ODbL, © OpenStreetMap contributors); Ringmast4r Global-Data-Center-Map (custom permissive license, attribution required); location attributes from WorldPop (R2025A), Global Solar Atlas PVOUT, Global Wind Atlas 4, USFS Wildfire Hazard Potential, the USGS National Seismic Hazard Model and the previous publish's lines and substations; gas distances and county queue from the previous publish's EIA gas pipelines and LBNL Queued Up requests; nearest city from Natural Earth populated places; generation within 20 km from the previous publish's plants; cooling degree days from NOAA NCEI nClimDiv county normals; elevation and slope from the Copernicus DEM GLO-30 (ESA, via AWS Open Data); water stress from WRI Aqueduct 4.0; ozone nonattainment from the EPA Green Book; drought from the U.S. Drought Monitor; tribal land from US Census TIGER/Line. License: CC BY; ODbL; custom permissive; WRI Aqueduct CC BY 4.0; USFS, USGS, EIA, NOAA, EPA, US Census and Natural Earth public domain; Copernicus DEM GLO-30 © DLR e.V. and Airbus Defence and Space GmbH; the U.S. Drought Monitor courtesy of NDMC
States and provinces (simplified polygons): Natural Earth 10m admin-1. License: Public domain