How many natural gas power plants are in ISO-NE?

ISO-NE has 113 operating utility-scale natural gas power plants with 17 GW of capacity, according to the EIA's monthly survey of power plants.

What is the largest natural gas power plant in ISO-NE?

Fore River Generating Station in Norfolk County, Massachusetts is the largest, at 872 MW. It came online in 2003.

How many natural gas power plants were built in ISO-NE in 2025?

1 natural gas power plant came online in ISO-NE in 2025, with 2 MW of capacity.

Who is developing natural gas power plants in ISO-NE?

Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.

Natural gas power plants in ISO-NE

ISO-NE has 113 operating natural gas power plants with 17 GW of capacity. 1 came online in 2025.

Operating113

See planned natural gas power plants in ISO-NE

Updated monthly. Last updated November 2026.

Under 250 MW250–999 MW1 GW and up

Updated monthly. Last updated November 2026.

ISO-NE had 79 natural gas power plants online in 2016 and 113 in 2026

103

107

109

111

112

113

2016’162017’172018’182019’192020’202021’212022’222023’232024’242025’252026’26

Natural gas power plants online at the end of each year. Source: EIA-860M, compiled by Cleanview.

The 10 largest natural gas power plants in ISO-NE

Operating, by capacity

#	Natural gas power plant	Location	Year online	Capacity
1	Fore River Generating Station	Norfolk County, Massachusetts	2003	872 MW
2	CPV Towantic Energy Center	New Haven County, Connecticut	2018	842 MW
3	Lake Road Generating Plant	Windham County, Connecticut	2002	840 MW
4	Salem Harbor Power Development LP	Essex County, Massachusetts	2018	798 MW
5	Granite Ridge	Rockingham County, New Hampshire	2003	790 MW
6	Kleen Energy Systems	Middlesex County, Connecticut	2011	693 MW
7	Newington Energy Center	Rockingham County, New Hampshire	2002	606 MW
8	Rhode Island State Energy Center	Providence County, Rhode Island	2002	596 MW
9	Milford Power Project	New Haven County, Connecticut	2004	578 MW
10	ANP Bellingham Energy Project	Norfolk County, Massachusetts	2002	578 MW

Natural gas power plants that came online most recently in ISO-NE

Newest first

#	Natural gas power plant	Location	Year online	Capacity
1	AbbieVie, Inc. - Worcester, MA	Worcester County, Massachusetts	2026	3 MW
2	UE-02601MA, LLC	Middlesex County, Massachusetts	2025	2 MW
3	MMWEC Simple Cycle Gas Turbine	Essex County, Massachusetts	2024	65 MW
4	Derby Fuel Cell	New Haven County, Connecticut	2024	14 MW
5	Stamford Health	Fairfield County, Connecticut	2023	2 MW
6	Stamford Health Tully Health Center	Fairfield County, Connecticut	2023	1 MW
7	Subase Microgrid Project	New London County, Connecticut	2022	7 MW
8	Naval Sub Base New London Fuel Cell	New London County, Connecticut	2022	7 MW
9	Norton Powerhouse 2	Worcester County, Massachusetts	2022	5 MW
10	Yale New Haven - New London	New London County, Connecticut	2022	2 MW

The developer behind each project is on paid plans. See plans

How Cleanview tracks natural gas power plants

Operating natural gas power plants come from the EIA's monthly survey of power plants. Planned projects come from the grid operators' interconnection queues. We research who is developing each one, since a queue lists a project company, not its owner.

Questions about natural gas power plants in ISO-NE

How many natural gas power plants are in ISO-NE?: ISO-NE has 113 operating utility-scale natural gas power plants with 17 GW of capacity, according to the EIA's monthly survey of power plants.
What is the largest natural gas power plant in ISO-NE?: Fore River Generating Station in Norfolk County, Massachusetts is the largest, at 872 MW. It came online in 2003.
How many natural gas power plants were built in ISO-NE in 2025?: 1 natural gas power plant came online in ISO-NE in 2025, with 2 MW of capacity.
Who is developing natural gas power plants in ISO-NE?: Interconnection queues list each project under a project company, not the developer behind it. Cleanview researches the developer of every project and has them on paid plans.