Largest greenhouse-gas emitters in Oregon

55 facilities in Oregon reported 13,734,569 metric tons CO2e of direct emissions to the EPA for 2023, 0.6% of the national total for reporting direct emitters. Power Plants accounts for the most (69%). Largest first.

#	Facility	City	Sector	t CO2e
1	Port Westward	Clatskanie	Power Plants	1,733,773
2	Coyote Springs	Boardman	Power Plants	1,576,674
3	Hermiston Power, LLC	Hermiston	Power Plants	1,563,688
4	Carty Generating Station	Boardman	Power Plants	1,255,636
5	HERMISTON GENERATING COMPANY, L.P.	Hermiston	Power Plants	1,199,069
6	Klamath Cogeneration Project	Klamath Falls	Power Plants	1,145,632
7	Beaver	Clatskanie	Power Plants	912,292
8	ASH GROVE CEMENT COMPANY-DURKEE	Durkee	Minerals	580,298
9	GEORGIA-PACIFIC TOLEDO LLC	Toledo	Pulp and Paper, Waste	336,731
10	WAUNA MILL	Clatskanie	Pulp and Paper, Waste	315,350
11	INTEL CORPORATION RONLER ACRES CAMPUS	Hillsboro	Other	283,665
12	WASTE MANAGEMENT DISPOSAL SERVICES OF OREGON	Arlington	Waste	260,629
13	MICROCHIP TECHNOLOGY INC	Gresham	Other	208,460
14	Dyno Nobel	Deer Island	Chemicals	190,239
15	SHORT MOUNTAIN LANDFILL	Eugene	Waste	189,631
16	ON Semiconductor	Gresham	Other	135,614
17	Jireh Semiconductor, Inc.	Hillsboro	Other	110,902
18	International Paper - Springfield Mill	Springfield	Pulp and Paper	110,745
19	Gas Transmission Northwest Pipeline Kent CS#10	Kent	Petroleum and Natural Gas Systems	105,946
20	Klamath Energy LLC	Klamath Falls	Power Plants	100,828
21	Gas Transmission Northwest Pipeline Bend CS#12	Bend	Petroleum and Natural Gas Systems	96,482
22	Evraz Oregon Steel	Portland	Metals	92,843
23	CASCADE STEEL ROLLING MILLS INC	Mcminnville	Metals	75,235
24	COVANTA MARION, INC	Brooks	Waste	69,591
25	KNOTT PIT LANDFILL	Bend	Waste	69,466
26	Gas Transmission Northwest Pipeline Bonanza CS#14	Bonanza	Petroleum and Natural Gas Systems	68,114
27	ROSEBURG LANDFILL	Roseburg	Waste	66,693
28	Gas Transmission Northwest Pipeline Chemult CS#13	Chemult	Petroleum and Natural Gas Systems	65,717
29	Dry Creek Landfill	White City	Waste	62,696
30	Willamette Falls Paper Company	West Linn	Pulp and Paper	62,477
31	CASCADE PACIFIC PULP HALSEY PULP MILL	Halsey	Pulp and Paper	56,768
32	Gas Transmission Northwest Pipeline Ione CS#9	Ione	Petroleum and Natural Gas Systems	41,938
33	Gas Transmission Northwest - Madras	Madras	Petroleum and Natural Gas Systems	41,730
34	ALTO COLUMBIA LLC	Boardman	Other	38,611
35	Qorvo US, Inc.	Hillsboro	Other	38,043
36	US GYPSUM - RAINIER PLANT	Rainier	Minerals	38,039
37	LAMB WESTON INC. Hermiston	Hermiston	Other	36,902
38	LAMB WESTON INCORPORATED	Boardman	Other	36,455
39	OREGON STATE UNIVERSITY	Corvallis	Other	35,355
40	Hollingsworth & Vose Fiber Company	Corvallis	Minerals	33,835
41	EP Minerals, LLC	Vale	Other	33,340
42	WASCO COUNTY LANDFILL	The Dalles	Waste	31,545
43	FINLEY BUTTES REGIONAL LANDFILL	Boardman	Waste	29,949
44	ENTEK International, LLC	Lebanon	Other	28,972
45	Cascades Tissue Group-Oregon, a division of Cascades Holding US Inc	Saint Helens	Pulp and Paper	28,698
46	Lamb Weston, Inc	Boardman	Other	26,715
47	CROOK COUNTY LANDFILL	Prineville	Waste	24,192
48	COFFIN BUTTE LANDFILL	Corvallis	Waste	22,911
49	RIVERBEND LANDFILL CO.	Mcminnville	Waste	21,077
50	INTEL CORPORATION ALOHA CAMPUS	Aloha	Other	15,228
51	ROSEBURG FOREST PRODUCTS - DILLARD	Dillard	Other, Waste	14,002
52	OWENS-BROCKWAY GLASS CONTAINER INC. PLANT 21	Portland	Minerals	11,029
53	Emerald People's Utility District	Eugene	Power Plants	1,731
54	ST JOHN LANDFILL	Portland	Waste	1,720
55	Murphy Plywood	Rogue River	Other	667

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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