How much power plant capacity does New Hampshire have?

New Hampshire has 4.6 GW of operating utility-scale capacity as of August 2026.

What is the largest power plant in New Hampshire?

Seabrook is the largest at 1.2 GW of nuclear capacity.

Where does New Hampshire get its electricity?

Power plants in New Hampshire generated 16.8 TWh in 2023. The mix is shown above. Power also flows between states, so what plants in a state generate is not the same as what its customers use.

Checked Oct 26, 2026

New Hampshire Power Plants

Utility-scale generators of 1 megawatt or more in New Hampshire, as of August 2026 (EIA-860M).

Operating capacity: 4.6 GW
Largest plant: Seabrook; 1.2 GW
Planned through 2028: 24.0 MW
Generation, 2023: 16.8 TWh

Capacity by fuel

Operating nameplate capacity

Natural gas1.4 GW 30.6%
Nuclear1.2 GW 27.1%
Petroleum521 MW 11.4%
Hydroelectric516 MW 11.3%
Coal459 MW 10.0%
Wind214 MW 4.7%
Biomass211 MW 4.6%
Battery storage14.0 MW 0.3%
Solar4.4 MW 0.1%

Electricity generated, 2023

Net generation by fuel from EPA eGRID. CO2 output rate 273 lb/MWh

Nuclear9.5 TWh 56.7%
Natural gas4.2 TWh 25.1%
Hydroelectric1.6 TWh 9.5%
Biomass779 GWh 4.6%
Wind411 GWh 2.4%
Coal160 GWh 1.0%
Petroleum68 GWh 0.4%
Other51 GWh 0.3%
Solar3,301 MWh 0.0%

Largest power plants

By operating capacity

Swipe the table sideways to see more columns.

#	Plant	Fuel	Capacity	Since
1	SeabrookRockingham	Nuclear	1.2 GW	1990
2	Granite RidgeRockingham	Natural gas	790 MW	2003
3	Newington Energy CenterRockingham	Natural gas	606 MW	2002
4	MerrimackMerrimack	Coal	496 MW	1960
5	NewingtonRockingham	Petroleum	414 MW	1974
6	S C MooreGrafton	Hydroelectric	195 MW	1957
7	ComerfordGrafton	Hydroelectric	168 MW	1930
8	Granite Reliable PowerCoos	Wind	99.0 MW	2012
9	Burgess BioPowerCoos	Biomass	75.0 MW	2013
10	Groton Wind LLCGrafton	Wind	48.0 MW	2012
11	Berlin GorhamCoos	Hydroelectric	44.3 MW	1914
12	Antrim WindHillsborough	Wind	28.8 MW	2019
13	NE Renewable Tamworth, LLCCarroll	Biomass	25.0 MW	1987
14	Lempster Wind LLCSullivan	Wind	24.0 MW	2008
15	SchillerRockingham	Petroleum	21.2 MW	1970
16	Bridgewater Power LPGrafton	Biomass	20.0 MW	1987
17	NE Renewable Springfield, LLCSullivan	Biomass	20.0 MW	1987
18	NE Renewable Whitefield, LLCCoos	Biomass	19.9 MW	1988
19	White LakeCarroll	Petroleum	18.6 MW	1968
20	Lost NationCoos	Petroleum	18.0 MW	1969
21	NE Renewable Bethlehem, LLCGRAFTON	Biomass	17.5 MW	1986
22	AmoskeagHillsborough	Hydroelectric	16.0 MW	1922
23	Smith (NH)Coos	Hydroelectric	15.0 MW	1948
24	Jericho PowerCoos	Wind	14.3 MW	2016
25	Wheelabrator Concord FacilityMerrimack	Biomass	14.0 MW	1989
26	Garvins FallsMerrimack	Hydroelectric	12.4 MW	1925
27	Pontook Hydro FacilityCoos	Hydroelectric	10.5 MW	1986
28	Turnkey Landfill Gas RecoveryStrafford	Biomass	9.2 MW	1992
29	Ayers IslandGrafton	Hydroelectric	8.4 MW	1925
30	UNH 7.9 MW PlantStrafford	Biomass	7.9 MW	2006
31	Dartmouth College Heating PlantGrafton	Petroleum	7.0 MW	1970
32	Eastman FallsMerrimack	Hydroelectric	6.4 MW	1937
33	Hampton FacilityRockingham	Natural gas	5.0 MW	2000
34	Dodge Falls AssociatesGrafton	Hydroelectric	5.0 MW	1990
35	Penacook Lower FallsMerrimack	Hydroelectric	4.6 MW	1983
36	Rolfe Canal HydroMerrimack	Hydroelectric	4.3 MW	1987
37	Gregg FallsHillsborough	Hydroelectric	3.5 MW	1985
38	Penacook Upper Falls HydroMerrimack	Hydroelectric	3.4 MW	1986
39	JackmanHillsborough	Hydroelectric	3.2 MW	1926
40	Mine Falls Generating StationHillsborough	Hydroelectric	3.0 MW	1985
41	Errol Hydroelectric ProjectCoos	Hydroelectric	3.0 MW	1986
42	Plymouth State College CogenerationGrafton	Petroleum	2.8 MW	1994
43	Pembroke HydroMerrimack	Hydroelectric	2.7 MW	1985
44	Clement Dam Hydro LLCBelknap	Hydroelectric	2.4 MW	1984
45	Nashua PlantHillsborough	Biomass	2.4 MW	1996
46	Merrimack Solar Farm, LLCHillsborough	Solar	2.4 MW	2019
47	GorhamCoos	Hydroelectric	2.2 MW	1917
48	Seven Hills New HampshireHillsborough	Petroleum	2.1 MW	1990
49	Blackwater Rd SolarStrafford	Solar	2.0 MW	2025
50	Stevens Mills DamMerrimack	Hydroelectric	1.9 MW	1985
51	China Mill HydroMerrimack	Hydroelectric	1.7 MW	1981
52	HooksettMerrimack	Hydroelectric	1.6 MW	1927
53	Mascoma HydroGrafton	Hydroelectric	1.5 MW	1988
54	Milton HydroStrafford	Hydroelectric	1.4 MW	1914
55	Newfound HydroelectricGrafton	Hydroelectric	1.4 MW	1983
56	RollinsfordStrafford	Hydroelectric	1.4 MW	1986
57	Somersworth Lower Great DamStrafford	Hydroelectric	1.3 MW	1985
58	Hillsborough HosieryHillsborough	Hydroelectric	1.2 MW	1989
59	Lower Village Water Power ProjectSullivan	Hydroelectric	1.2 MW	1995
60	Lochmere Hydroelectric PlantBelknap	Hydroelectric	1.2 MW	1984
61	EHC West HopkintonMerrimack	Hydroelectric	1.0 MW	1985

Show all 61Show fewer

Planned and under construction

Largest planned additions, including expansions of operating plants

Swipe the table sideways to see more columns.

Plant	Planned	Operating now
Nutes SolarStrafford	20.0 MW	None yet
Kearsarge GrissomSullivan	4.0 MW	None yet

Power plants by county

Operating plants located in each county

Capacity is the nameplate rating of generators that are operating or on standby. Solar capacity is in alternating current (AC). Batteries are counted by power (MW), not by stored energy (MWh).

Frequently asked questions

How much power plant capacity does New Hampshire have?: New Hampshire has 4.6 GW of operating utility-scale capacity as of August 2026.
What is the largest power plant in New Hampshire?: Seabrook is the largest at 1.2 GW of nuclear capacity.
Where does New Hampshire get its electricity?: Power plants in New Hampshire generated 16.8 TWh in 2023. The mix is shown above. Power also flows between states, so what plants in a state generate is not the same as what its customers use.

Source: U.S. Energy Information Administration, Form EIA-860M; U.S. EPA eGRID · Data for August 2026

Data sources

Form EIA-860M Monthly Electric Generator InventoryU.S. Energy Information Administration
Emissions & Generation Resource Integrated Database (eGRID)U.S. Environmental Protection Agency

Data for August 2026

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