Largest greenhouse-gas emitters in Idaho

36 facilities in Idaho reported 5,668,302 metric tons CO2e of direct emissions to the EPA for 2023, 0.2% of the national total for reporting direct emitters. Power Plants accounts for the most (44%). Largest first.

#	Facility	City	Sector	t CO2e
1	Rathdrum Power, LLC	Rathdrum	Power Plants	695,632
2	Langley Gulch Power Plant	New Plymouth	Power Plants	607,456
3	P4 PRODUCTION L L C	Soda Springs	Chemicals	466,431
4	Rathdrum Combustion Turbine Project	Rathdrum	Power Plants	436,177
5	Bennett Mountain Power Project	Mountain Home	Power Plants	407,421
6	Evander Andrews Power Complex	Mountain Home	Power Plants	331,721
7	CLEARWATER PAPER CORP	Lewiston	Pulp and Paper, Waste	294,660
8	AMALGAMATED SUGAR CO LLC	Paul	Minerals, Waste	282,864
9	AMALGAMATED SUGAR CO LLC	Nampa	Minerals, Waste	262,054
10	AMALGAMATED SUGAR CO LLC	Twin Falls	Minerals	201,358
11	Itafos Conda LLC	Soda Springs	Chemicals	138,625
12	Gas Transmission Northwest Pipeline Athol CS#5	Athol	Petroleum and Natural Gas Systems	138,500
13	Pickles Butte Sanitary Landfill	Nampa	Waste	135,518
14	Gas Transmission Northwest Pipeline Sandpoint CS#4	Sandpoint	Petroleum and Natural Gas Systems	111,439
15	JR SIMPLOT COMPANY DON SIDING COMPLEX	Pocatello	Chemicals	105,807
16	Ada County Solid Waste Management	Boise	Waste	88,400
17	Gas Transmission Northwest Pipeline (Eastport Compressor Station)	Sandpoint	Petroleum and Natural Gas Systems	85,670
18	Lamb Weston Twin Falls	Twin Falls	Other, Waste	83,139
19	MCCAIN FOODS USA INC	Burley	Other, Waste	76,423
20	JR SIMPLOT COMPANY - FOOD GROUP	Caldwell	Other, Waste	71,412
21	BASIC AMERICAN FOODS	Blackfoot	Other	63,061
22	LAMB WESTON INCORPORATED	American Falls	Other, Waste	63,053
23	MICRON TECHNOLOGY, INC.	Boise	Other	60,486
24	BUSCH AGRICULTURAL RESOURCES	Idaho Falls	Other	57,983
25	Basic American Foods Rexburg	Rexburg	Other	48,508
26	ALTO MAGIC VALLEY LLC	Burley	Other	44,427
27	Sorrento Lactalis	Nampa	Other	42,346
28	LA Semiconductor	Pocatello	Other	38,434
29	Milner Butte Landfill	Burley	Waste	37,461
30	FORT HALL MINE LANDFILL	Pocatello	Waste	35,412
31	Glanbia Foods, Inc.	Gooding	Other	30,870
32	Agropur	Jeorme	Other	30,475
33	Chobani	Twin Falls	Other	29,788
34	CS Beef Packers	Kuna	Other, Waste	26,966
35	Great Western Malting Co	Pocatello	Other	25,508
36	FIGHTING CREEK FARM LANDFILL	Coeur D\alene	Waste	12,816

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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