Facility detail

LEWIS & CLARK STATION

35023 HWY 23, SIDNEY, MT, 59270

Parent company: MDU RESOURCES GROUP INC

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	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	Manganese compounds	Barium	Manganese	Total
2021	92	—	166	—	—	266
2020	225	—	444	—	—	688
2019	262	—	486	—	—	769
2018	219	—	409	—	—	647
2017	204	—	416	—	—	638
2016	229	—	448	—	—	698
2015	117,359	5,468	25,777	—	—	149,921
2014	28,501	27,026	6,833	—	—	63,071
2013	46,629	28,632	10,836	—	—	87,024
2012	30,895	25,163	7,063	—	—	63,815
2011	38,046	28,007	11,294	—	—	78,078
2010	36,691	28,880	8,457	—	—	74,728
2009	36,056	29,327	8,311	—	—	74,412
2008	38,092	28,952	8,781	—	—	76,579
2007	34,136	27,224	7,869	—	—	69,910
2006	47,079	29,027	10,852	—	—	87,860
2005	35,332	23,863	8,144	—	—	67,999
2004	31,150	29,161	7,181	—	—	68,132
2003	41,306	29,262	9,521	—	—	80,896
2002	36,000	26,900	8,234	—	—	71,758
2001	57,335	29,000	12,800	—	—	100,124
2000	42,300	30,000	10,050	—	—	82,457
1999	—	22,000	—	23,555	5,401	50,996
1998	—	—	—	35,305	8,154	45,359