Largest greenhouse-gas emitters in Wisconsin

128 facilities in Wisconsin reported 39,354,628 metric tons CO2e of direct emissions to the EPA for 2023, 1.7% of the national total for reporting direct emitters. Power Plants accounts for the most (81%). Largest first.

#	Facility	City	Sector	t CO2e
1	Elm Road Generating Station	Oak Creek	Power Plants	5,879,315
2	Columbia	Pardeeville	Power Plants	4,621,127
3	South Oak Creek	Oak Creek	Power Plants	3,951,885
4	Port Washington Generating Station	Port Washington	Power Plants	3,154,314
5	Weston	Kronenwetter	Power Plants	3,030,740
6	Riverside Energy Center	Beloit	Power Plants	2,867,896
7	Edgewater (4050)	Sheboygan	Power Plants	2,086,756
8	Fox Energy Center	Kaukauna	Power Plants	1,625,577
9	J P Madgett	Alma	Power Plants	1,546,538
10	GRAYMONT (WI) LLC	Superior	Minerals	521,551
11	Valley (WEPCO)	Milwaukee	Power Plants	416,963
12	Neenah Energy Facility	Neenah	Power Plants	368,505
13	Rockgen Energy Center	Cambridge	Power Plants	349,879
14	Sheboygan Falls Energy Facility	Plymouth	Power Plants	334,103
15	Graymont WESTERN LIME EDEN	Eden	Minerals	328,455
16	ND PAPER INC - BIRON DIVISION	Biron	Pulp and Paper	320,692
17	GEORGIA-PACIFIC BROADWAY LLC	Green Bay	Pulp and Paper	318,363
18	McKinley Paper WI Company	Combined Locks	Power Plants, Waste	287,871
19	Whitewater Generating Station	Whitewater	Power Plants	285,127
20	DOMTAR A. W. LLC-NEKOOSA	Nekoosa	Pulp and Paper, Waste	267,877
21	Ahlstrom NA Specialty Solutions LLC	Kaukauna	Pulp and Paper, Waste	217,180
22	West Campus Cogeneration Facility	Madison	Power Plants	211,764
23	PACKAGING CORPORATION OF AMERICA-TOMAHAWK	Tomahawk	Pulp and Paper, Waste	202,705
24	Ahlstrom Mosinee LLC	Mosinee	Pulp and Paper, Waste	201,415
25	PROCTER & GAMBLE PAPER PRODUCTS CO	Green Bay	Pulp and Paper	191,281
26	Superior Refining Company LLC	Superior	Refineries	185,344
27	WAUPACA FOUNDRY, INC-PLANTS 2 & 3	Waupaca	Metals	167,496
28	UW Madison - Charter St.	Madison	Power Plants	162,462
29	Graymont Western Lime GREEN BAY	Green Bay	Minerals	161,964
30	CARMEUSE LIME & STONE ROCKWELL OPERATION	Manitowoc	Minerals	160,190
31	CHARTER STEEL	Saukville	Metals	143,251
32	JANESVILLE CITY/ROCK COUNTY LANDFILL	Janesville	Waste	143,192
33	Georgia-Pacific Broadway LLC	Green Bay	Waste	140,472
34	West Marinette	Marinette	Power Plants	136,222
35	Marquis Energy - Wisconsin, LLC	Necedah	Other	136,084
36	ATI LADISH LLC	Cudahy	Other	127,480
37	CARDINAL FG	Portage	Minerals	124,207
38	GREEN BAY PACKAGING INC MILL DIVISION	Green Bay	Pulp and Paper	120,354
39	Ahlstrom NA Specialty Solutions LLC	Rhinelander	Pulp and Paper	118,121
40	Paris	Union Grove	Power Plants	118,092
41	CARDINAL FG COMPANY	Menomonie	Minerals	114,973
42	BADGER STATE ETHANOL	Monroe	Other, Waste	111,351
43	UNITED ETHANOL, LLC	Milton	Other	96,346
44	WISCONSIN RAPIDS PAPER MILL	Wisconsin Rapids	Waste, Pulp and Paper	91,072
45	DIDION ETHANOL LLC	Cambria	Other	88,974
46	Concord	Watertown	Power Plants	88,705
47	De Pere Energy Center	De Pere	Power Plants	88,468
48	Big River Resources Boyceville, LLC	Boyceville	Other	87,265
49	UNITED WISCONSIN GRAIN PRODUCERS LLC	Friesland	Other	86,983
50	Waupaca Foundry INC. - PLT 1	Waupaca	Metals	83,654
51	ACE ETHANOL LLC	Stanley	Other	80,642
52	MOCCASIN MIKE SANITARY LANDFILL	Superior	Waste	79,332
53	Manitowoc	Manitowoc	Power Plants	76,260
54	Ardagh Glass Inc. (Burlington)	Burlington	Minerals	76,121
55	ORCHARD RIDGE LANDFILL & MRF	Menomonee Falls	Waste	75,486
56	STEVENS POINT MILL	Stevens Point	Pulp and Paper	74,419
57	MMSD-JONES ISLAND WASTEWATER TREATMENT PLANT	Milwaukee	Other	73,395
58	Pulliam	Green Bay	Power Plants	70,913
59	Kohler Co.	Kohler	Minerals, Waste	64,409
60	Essity Professional Hygiene North America LLC	Menasha	Pulp and Paper	63,907
61	GREDE LLC REEDSBURG	Reedsburg	Metals	59,648
62	Fox River Valley Ethanol, LLC	Oshkosh	Other	55,623
63	OUTAGAMIE COUNTY LANDFILL	Appleton	Waste	55,561
64	U S PAPER MILLS Menasha	Menasha	Pulp and Paper	49,679
65	Ahlstrom North America SPECIALTY SOLUTIONS	Depere	Pulp and Paper	49,418
66	MALLARD RIDGE LANDFILL, INC	Delevan	Waste	46,406
67	NEENAH PAPER INC - WHITING MILL	Stevens Point	Pulp and Paper	44,663
68	LA CROSSE COUNTY SOLID WASTE MANAGEMENT FACILITY	La Crosse	Waste	43,211
69	Rothschild Biomass Cogeneration Plant	Rothschild	Power Plants	41,885
70	HICKORY MEADOWS LANDFILL, LLC	Hilbert	Waste	41,846
71	EMERALD PARK LANDFILL LLC	Muskego	Waste	41,069
72	NEENAH FOUNDRY CO PLTS 2 & 3	Neenah	Metals	40,126
73	MILWAUKEE REGIONAL MEDICAL CENTER THERMAL	Milwaukee	Power Plants	39,824
74	KIMBERLY-CLARK CORP	Marinette	Pulp and Paper	39,084
75	MCCAIN FOODS USA INC	Plover	Other, Waste	39,067
76	SAPUTO CHEESE USA INC	Waupun	Other	38,558
77	Grassland Dairy Products, Inc.	Greenwood	Other, Waste	38,018
78	French Island	La Crosse	Power Plants	36,165
79	WISCONSIN PAPERBOARD	Milwaukee	Pulp and Paper	36,086
80	Troy Area Landfill	East Troy	Waste	35,972
81	3M CO - WAUSAU DOWNTOWN	Wausau	Other	35,941
82	MERCURY MARINE FOND DU LAC COMPLEX	Fond Du Lac	Other	33,504
83	Little Rapids - Shawano Paper Mill	Shawano	Pulp and Paper	33,064
84	Hi-Crush Inc Wyeville	Tomah	Other	33,045
85	ST PAPER LLC	Oconto Falls	Pulp and Paper	32,739
86	SEVEN MILE CREEK LANDFILL LLC	Eau Claire	Waste	32,328
87	Molson Coors-MILWAUKEE BREWERY	Milwaukee	Other	31,356
88	Dunn Paper - Ladysmith, LLC	Ladysmith	Pulp and Paper	29,542
89	Metro Recycling and Disposal Facility	Franklin	Waste	29,508
90	Agropur Inc.	Luxemburg	Other	28,456
91	SANIMAX USA LLC	Green Bay	Other	28,167
92	MARATHON COUNTY LANDFILL	Ringle	Waste	27,743
93	FOX RIVER VALLEY ETHANOL LLC - PICKETT	Pickett	Other	27,738
94	Wheaton Generating Plant	Eau Claire	Power Plants	27,472
95	DANE CNTY LANDFILL SITE #2 RODEFELD	Madison	Waste	27,439
96	FritoLay	Beloit	Other	26,835
97	GLACIER RIDGE LANDFILL LLC	Horicon	Waste	26,421
98	Cascades Tissue Group Wisconsin Inc	Eau Claire	Pulp and Paper	25,772
99	WATER RENEWAL CENTER	Stevens Point	Waste, Other	25,034
100	SC JOHNSON & SON INC WAXDALE FACILITY	Sturtevant	Chemicals	24,715
101	APPVION - APPLETON PLT	Appleton	Pulp and Paper	24,684
102	Elk Mound Generating Station	Elk Mound	Power Plants	24,124
103	Masonite Corporation	Marshfield	Other	23,657
104	DEER TRACK PARK LANDFILL	Watertown	Waste	23,296
105	WASTE MANAGEMENT OF WISCONSIN, INC.	Whitelaw	Waste	22,559
106	Pheasant Run Recycling and Disposal Facility	Bristol	Waste	22,442
107	ERCO Worldwide (USA) Inc	Nekoosa	Chemicals	22,426
108	ADVANCED DISPOSAL CRANBERRY CREEK LANDFILL LLC	Wisconsin Rapids	Waste	22,229
109	Quad/Graphics, Inc. - Lomira Facility	Lomira	Pulp and Paper	22,084
110	South Fond Du Lac	Fond Du Lac	Power Plants	20,963
111	UW Milwaukee	Milwaukee	Power Plants	20,843
112	WINNEBAGO COUNTY SUNNYVIEW LANDFILL	Oshkosh	Waste	20,624
113	Nemak USA Inc. - Gateway	Sheboygan	Metals	20,501
114	Skana Aluminum Company	Manitowoc	Metals	20,465
115	Neenah Inc	neenah	Pulp and Paper	20,007
116	GEORGIA-PACIFIC CONSUMER OPERATIONS LLC	Green Bay	Waste, Pulp and Paper	18,675
117	VALLEY TRAIL RECYCLING & DISPOSAL FACILITY	Berlin	Waste	17,736
118	W M W I - TIMBERLINE TRAIL RDF	Weyerhaeuser	Waste	17,064
119	Aztalan Bio LLC	Johnson Creek	Other	15,063
120	Great Lakes Gas Transmission Pipeline Iron River CS#6	Iron River	Petroleum and Natural Gas Systems	14,627
121	USG INTERIORS, LLC - WALWORTH PLANT	Walworth	Minerals	14,321
122	Bay Front	Ashland	Power Plants	14,220
123	Germantown Power Plant	Germantown	Power Plants	13,651
124	Blount Street	Madison	Power Plants	13,003
125	LAKE AREA DISPOSAL LF	Sarona	Waste	11,888
126	KESTREL HAWK LANDFILL	Racine	Waste	6,341
127	Seagrave Fire Apparatus LLC	Clintonville	Other	2,590
128	Rock River	Beloit	Power Plants	328

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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