Largest greenhouse-gas emitters in South Dakota

39 facilities in South Dakota reported 6,299,962 metric tons CO2e of direct emissions to the EPA for 2023, 0.3% of the national total for reporting direct emitters. Power Plants accounts for the most (47%). Largest first.

#	Facility	City	Sector	t CO2e
1	Big Stone	Big Stone City	Power Plants	1,919,343
2	GCC DACOTAH	Rapid City	Minerals	817,514
3	Deer Creek Station	Elkton	Power Plants	461,037
4	PETE LIEN & SONS, INC.	Rapid City	Minerals	278,549
5	Astoria Station	Astoria	Power Plants	227,933
6	NUGEN ENERGY LLC	Marion	Other	204,168
7	VALERO RENEWABLE FUELS LLC	Aurora	Other	201,939
8	ABERDEEN ENERGY LLC	Mina	Other	197,928
9	Glacial Lakes Energy	Watertown	Other	183,158
10	Angus Anson	Sioux Falls	Power Plants	161,253
11	POET Biorefining Mitchell, LLC	Mitchell	Other	107,748
12	DAKOTA ETHANOL, LLC	Wentworth	Other	103,284
13	Ringneck Energy	Onida	Other	101,614
14	POET Biorefining - Hudson	Hudson	Other	99,741
15	Poet Biorefining-Big Stone	Big Stone City	Other	96,558
16	Groton Generating Station	Groton	Power Plants	89,416
17	POET Biorefining - Groton	Groton	Other	87,870
18	SIOUX FALLS REGIONAL SANITARY LANDFILL (SFRSL)	Hartford	Waste	87,241
19	Hub City Energy	Watertown	Other	78,278
20	REDFIELD ENERGY LLC	Redfield	Other	68,250
21	POET Biorefining-Chancellor	Chancellor	Other	62,194
22	Huron Energy	Huron	Other	61,951
23	Ag Processing Inc	Aberdeen	Other	55,627
24	BROWN COUNTY LANDFILL	Aberdeen	Waste	55,468
25	Smithfield Packaged Meats Corp.	Sioux Falls	Other, Waste	53,097
26	Agropur, Inc.	Lake Norden	Other	49,285
27	Red River Energy	Rosholt	Other	44,450
28	Huron	Huron	Power Plants	44,092
29	BROOKINGS CITY LANDFILL	Brookings	Waste	41,062
30	WATERTOWN LANDFILL	Watertown	Waste	40,089
31	SOUTH DAKOTA SOYBEAN PROCESSORS	Volga	Other	39,854
32	Vermillion Sanitary Landfill	Vermillion	Waste	33,092
33	Hydro Extrusion USA, LLC.	Yankton	Metals	29,166
34	Lange	Rapid City	Power Plants	23,769
35	Aberdeen Generating Station	Aberdeen	Power Plants	22,998
36	Prairie Aquatech Manufacturing, LLC	Volga	Other	21,065
37	RAPID CITY LANDFILL	Rapid City	Waste	17,862
38	POET RESEARCH CENTER, INC.	Scotland	Other	16,316
39	BENTONITE PERFORMANCE MINERALS-COLONY	Belle Fourche	Other	15,703

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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