Facility detail

RM HESKETT STATION

2025 38TH ST, MANDAN, ND, 58554

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	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	Zinc compounds	Barium	Total
2022	4,242	18,061	3,267	18,006	—	44,450
2021	39,220	181,713	32,785	107,882	—	370,464
2020	37,858	166,939	30,236	91,315	—	335,534
2019	31,841	158,609	28,570	83,236	—	309,442
2018	35,983	177,961	32,123	73,486	—	326,825
2017	35,653	163,364	29,488	67,298	—	301,136
2016	22,701	167,741	30,278	67,413	—	294,299
2015	25,617	148,245	32,312	51,896	—	267,614
2014	306,036	196,766	35,506	—	—	542,155
2013	254,176	160,502	28,964	—	—	447,223
2012	307,611	171,885	30,986	—	—	514,373
2011	290,282	178,988	17,430	—	—	491,565
2010	256,381	166,639	18,093	—	—	443,919
2009	308,938	202,374	22,078	—	—	536,799
2008	284,737	206,779	22,452	—	—	517,437
2007	305,919	225,045	24,449	—	—	559,205
2006	227,087	158,627	17,224	—	—	405,608
2005	306,758	214,162	23,248	—	—	547,770
2004	308,249	223,443	24,265	—	—	559,722
2003	314,422	189,192	20,540	—	—	527,349
2002	309,000	185,302	20,069	—	—	517,524
2001	324,000	211,502	23,078	—	—	562,151
2000	248,000	171,202	18,064	—	—	437,397
1999	320,000	—	—	—	293,108	645,612
1998	—	—	—	—	242,506	293,512