Largest greenhouse-gas emitters in Wyoming

64 facilities in Wyoming reported 50,054,465 metric tons CO2e of direct emissions to the EPA for 2023, 2.1% of the national total for reporting direct emitters. Power Plants accounts for the most (71%). Largest first.

#	Facility	City	Sector	t CO2e
1	Laramie River	Wheatland	Power Plants	10,979,532
2	Jim Bridger	Point Of Rocks	Power Plants	8,973,791
3	Dave Johnston	Glenrock	Power Plants	4,166,695
4	Shute Creek Facility	Kemmerer	Petroleum and Natural Gas Systems	3,155,545
5	Dry Fork Station	Gillette	Power Plants	2,840,045
6	Naughton	Kemmerer	Power Plants	2,649,771
7	Wyodak	Gillette	Power Plants	2,233,043
8	Genesis Alkali Westvaco	Green River	Minerals	1,824,844
9	Tata Chemicals Soda Ash Partners, LLC	Green River	Minerals	1,537,521
10	HF Sinclair Parco Refining Company LLC	Sinclair	Refineries, Chemicals	1,050,393
11	American Soda LLC	Green River	Minerals	970,706
12	Wygen III	Gillette	Power Plants	874,717
13	Neil Simpson II	Gillette	Power Plants	835,893
14	Sisecam Wyoming LLC	Green River	Minerals	815,087
15	Wygen II	Gillette	Power Plants	810,957
16	Wygen I	Gillette	Power Plants	799,205
17	MOUNTAIN CEMENT CO	Laramie	Minerals	522,258
18	SIMPLOT PHOSPHATES	Rock Springs	Chemicals	473,444
19	Cheyenne Plant	Cheyenne	Chemicals	383,736
20	Echo Springs Gas Plant	Wamsutter	Petroleum and Natural Gas Systems	381,669
21	SINCLAIR CASPER REFINING COMPANY	Casper	Refineries	264,698
22	KERN RIVER GAS TRANSMISSION COMPANY: MUDDY CREEK COMPRESSOR STATION	Kemmerer	Petroleum and Natural Gas Systems	215,566
23	Genesis Alkali Granger	Granger	Other	207,515
24	Opal Gas Plant	Opal	Petroleum and Natural Gas Systems	206,702
25	Jonathon Lime Plant	Laramie	Minerals	196,001
26	ContangoResources_LOST CABIN	Lysite	Petroleum and Natural Gas Systems	183,283
27	Cheyenne Prairie Generating Station	Cheyenne	Power Plants	182,458
28	Carter Creek	Evanston	Petroleum and Natural Gas Systems	165,046
29	WYOMING LIME PRODUCERS	Frannie	Minerals	160,425
30	WYOMING REFINING COMPANY	Newcastle	Refineries	156,346
31	P4 Production, LLC	Rock Springs	Petroleum and Natural Gas Systems	154,570
32	Cheyenne Renewable Diesel Company LLC	Cheyenne	Chemicals	125,815
33	Thunder Creek Gas Services Buckshot Gas Plant	Douglas	Petroleum and Natural Gas Systems	120,955
34	MountainWest Pipeline - Rock Springs Station (Tran)	Rock Springs	Petroleum and Natural Gas Systems	112,740
35	Blacks Fork Gas Plant	Granger	Petroleum and Natural Gas Systems	112,471
36	Steamboat Processing Facility	Douglas	Petroleum and Natural Gas Systems	103,157
37	Bucking Horse Plant	Douglas	Petroleum and Natural Gas Systems	103,059
38	Elk Basin Gas Plant	Powell	Petroleum and Natural Gas Systems	74,650
39	CHEYENNE LANDFILL	Cheyenne	Waste	68,038
40	KERN RIVER GAS TRANSMISSION CO: COYOTE CREEK COMPRESSOR STATION	Evanston	Petroleum and Natural Gas Systems	62,383
41	50 Buttes Gas Plant	Gillette	Petroleum and Natural Gas Systems	61,389
42	Hilight-Reno Junction Gas Plant	Gillette	Petroleum and Natural Gas Systems	58,391
43	Douglas Gas Plant	Douglas	Petroleum and Natural Gas Systems	55,309
44	AMERICAN COLLOID	Colony	Other	53,087
45	Granger Gas Plant	Granger	Petroleum and Natural Gas Systems	41,101
46	THE WESTERN SUGAR COOPERATIVE	Lovell	Minerals	40,943
47	Pioneer Cryogenic Plant	Opal	Petroleum and Natural Gas Systems	40,218
48	Campbell County Landfill No.2	Gillette	Waste	38,138
49	BENTONITE PERFORMANCE MINERALS LLC LOVELL	Lovell	Other	37,711
50	GEORGIA PACIFIC Gypsum LLC	Lovell	Minerals	35,314
51	WYOMING SUGAR CO	Worland	Minerals	34,968
52	CIG Station 5680 Wamsutter, WY	Wamsutter	Petroleum and Natural Gas Systems	33,730
53	Casper Gas Plant	Casper	Petroleum and Natural Gas Systems	33,133
54	Vermillion Gas Plant	Rock Springs	Petroleum and Natural Gas Systems	31,325
55	NORTHWEST PIPELINE GP - MUDDY CREEK C/S	Kemmerer	Petroleum and Natural Gas Systems	29,739
56	West Frenchie Draw Amine Plant	Lysite	Petroleum and Natural Gas Systems	29,379
57	NORTHWEST PIPELINE GP GREEN RIVER C/S	Green River	Petroleum and Natural Gas Systems	26,998
58	WIC Station 7950 Douglas, WY	Douglas	Petroleum and Natural Gas Systems	24,921
59	UW CENTRAL ENERGY PLANT	Laramie	Power Plants	24,844
60	Rowdy Jewell Gas Plant	Gillette	Petroleum and Natural Gas Systems	19,702
61	SILVER EAGLE REFINING, INCORPORATED	Evanston	Refineries	16,299
62	CASPER BALEFILL	Casper	Waste	16,242
63	Neil Simpson II (CT2)	Gillette	Power Plants	11,754
64	CIG Station 5690 Muddy Gap, WY	Sinclair	Petroleum and Natural Gas Systems	5,100

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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