Facility detail

U.S. MARINE CORPS CHOCOLATE MOUNTAINS AERIAL GUNNERY RANGE

1065 CUFF RD, NILAND, CA, 92257

Parent company: US DEPARTMENT OF DEFENSE

Carcinogen PBT — EPA classifications across all reporting years

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Year-over-year total releases

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

Top chemical totals

The 10 chemicals with the highest cumulative on-site releases in pounds (lbs) across all available years.

Full release table

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

All values in pounds (lbs)
Year	Copper	Lead	Lead And Lead Compounds	Lead compounds	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	Total (lbs)
2024	65,151	—	53,426	—	—	118,578
2023	85,325	—	64,095	—	—	149,420
2022	83,713	—	46,936	—	—	130,649
2021	63,914	—	58,241	—	—	122,155
2020	50,418	—	37,803	—	—	88,221
2019	57,417	—	37,302	—	—	94,719
2018	74,588	—	50,561	—	—	125,149
2017	83,011	85,458	—	1,745	—	170,215
2016	100,618	65,460	—	1,256	—	167,334
2015	242,268	43,222	—	1,513	—	287,003
2014	80,031	67,241	—	1,528	—	148,800
2013	56,401	51,743	—	936	—	109,082
2012	49,160	56,215	—	3,736	—	109,112
2011	3,868,358	34,018	—	1,323	—	3,903,712
2010	116,937	39,253	—	1,666	—	157,881
2009	91,054	34,003	—	2,274	—	127,331
2008	55,139	30,417	—	6,822	—	92,378
2007	88,998	37,828	—	10,646	—	137,506
2006	413,753	—	—	80,931	8,405	503,152
2005	48,343	—	—	29,726	—	78,069
2004	17,037	—	—	20,060	—	37,097
2003	28,272	19,081	—	273	—	47,626
2001	26,867	18,590	—	813	—	46,270

▎ Facilities report to EPA's TRI once they manufacture, process, or use a listed chemical above set thresholds. Once that threshold is crossed, they must report actual releases regardless of size — so a small number reflects genuine low-level discharge, not a data error.