Facility detail

HARDIN GENERATING STATION

643 INDUSTRIAL PARK RD, HARDIN, MT, 59034

Parent company: ROCKY MOUNTAIN POWER LLC

Carcinogen PBT — EPA classifications across all reporting years

Year-over-year total releases

Reported on-site TRI releases in pounds, grouped by reporting year.

The 10 chemicals with the highest cumulative on-site releases across all available years.

Rows are years. Columns show the five highest-total chemicals across all years plus each year's total release volume.

Year	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	Manganese compounds	Barium And Barium Compounds	Manganese	Total
2024	26,940	—	—	2,863	1,401	32,245
2023	24,298	—	—	3,016	1,386	29,648
2022	29,851	—	—	4,932	2,195	38,230
2021	27,020	—	—	5,752	2,513	36,517
2020	—	—	—	502	—	588
2019	7,631	783	431	—	—	9,178
2018	8,072	—	—	1,074	—	10,048
2017	6,100	1,987	1,154	—	—	9,723
2016	17,857	2,304	1,417	—	—	22,445
2015	26,342	3,462	2,134	—	—	33,226
2014	35,801	4,687	2,832	—	—	45,043
2013	33,212	4,863	2,646	—	—	42,274
2012	20,554	2,955	1,749	—	—	26,276
2011	33,595	4,049	2,534	—	—	41,778
2010	41,043	5,500	3,250	—	—	51,758
2009	41,170	5,973	3,467	—	—	52,681
2008	31,302	5,489	3,160	—	—	41,646
2007	39,099	7,541	4,271	—	—	53,099
2006	27,205	4,089	2,107	—	—	34,695