Facility detail

MP MINE OPERATIONS LLC

67750 BAILEY RD, MOUNTAIN PASS, CA, 92366

Parent company: NA

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	Ammonium nitrate (solution)	Lead And Lead Compounds	Lead compounds	Ammonia	Chlorine	Total
2024	—	1,600,418	—	11,373	607	1,617,518
2023	—	1,384,319	—	7,184	2,137	1,398,061
2015	—	—	70	—	1,013	13,541
2014	—	—	149	—	991	16,294
2013	—	—	14	—	3,100	16,115
2012	—	—	207	—	17,000	17,207
2011	—	—	17	—	14,000	40,997
2010	—	—	138	—	855	992
2009	—	—	122	—	—	122
2008	—	—	202	—	—	202
2007	—	—	227	—	—	227
2006	—	—	245	—	—	245
2005	—	—	281	—	—	281
2004	—	—	280	—	—	280
2003	—	—	383	—	—	383
2002	—	—	32,936	—	—	32,936
2001	—	—	27,361	—	—	27,361
2000	—	—	—	—	—	8
1999	—	—	223,306	—	—	223,306
1998	—	—	1,367,454	—	1,432	1,686,559
1995	—	—	—	811,526	26,007	2,082,112
1994	506,976	—	7,442	28,291	12,474	601,317
1993	599,028	—	57,858	98,441	15,936	779,506
1992	682,089	—	22,970	172,151	32,214	1,019,637
1991	5,764,976	—	74,647	151,727	304,415	6,388,368
1990	2,300,000	—	63,000	182,000	352,000	2,987,870
1989	2,700,000	—	50,000	171,000	550,000	3,577,700
1988	—	—	54,653	110,000	—	214,103
1987	—	—	—	—	—	34,383