Largest greenhouse-gas emitters in New Hampshire

17 facilities in New Hampshire reported 2,392,513 metric tons CO2e of direct emissions to the EPA for 2023, 0.1% of the national total for reporting direct emitters. Power Plants accounts for the most (78%). Largest first.

#	Facility	City	Sector	t CO2e
1	Granite Ridge Energy	Londonderry	Power Plants	1,299,588
2	Newington Energy	Newington	Power Plants	342,951
3	Merrimack	Bow	Power Plants	171,786
4	WM of NH - TREE (Turnkey Landfill)	Gonic	Waste	128,922
5	NORTH COUNTRY ENVIRONMENTAL SERVICES INC	Bethlehem	Waste	72,501
6	WHEELABRATOR CONCORD COMPANY LP	Concord (penacook)	Waste	70,061
7	Georgia-Pacific Gypsum	Newington	Minerals	68,769
8	MOUNT CARBERRY LANDFILL	Berlin	Waste	49,800
9	Newington	Newington	Power Plants	48,368
10	DARTMOUTH COLLEGE HEATING PLANT	Hanover	Other	41,362
11	Gold Bond - POR Plant	Portsmouth	Minerals	34,826
12	University of New Hampshire	Durham	Other	20,385
13	Gorham Acquisition LLC	Gorham	Pulp and Paper	12,627
14	ANHEUSER-BUSCH LLC	Merrimack	Other	10,838
15	FOUR HILLS LANDFILL	Nashua	Waste	10,011
16	LEBANON LANDFILL AND RECYCLING CENTER	West Lebanon	Waste	9,028
17	Schiller	Portsmouth	Power Plants	688

Source: EPA Greenhouse Gas Reporting Program, 2023 reporting year, sector-level emissions from data.epa.gov (fetched October 31, 2026). Direct emissions in metric tons CO2e as EPA totals them: emitter sectors only, biogenic CO2 reported separately. Covers facilities that report as direct emitters; most emit 25,000 t CO2e or more a year. Reference only.

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