TRI Reporter Clean Air Act RCRA

KENNECOTT UTAH COPPER CORP. SMELTER AND REFINERY

Quick Summary

•Released 33,304,111 lbs of toxic chemicals to the environment in the most recent TRI reporting year.
•Assessed $211,351 in total penalties since records began.
•Reports releases of chemicals classified as known or probable carcinogens.

Address: 11500 WEST 2100 SOUTH (REFINERY) &
MAGNA, UT 84044
View on map ↗
County: SALT LAKE County
Industry: Manufacturing
NAICS (North American Industry Classification): 331411
Inspections: 7 · last Jun 4, 2025
Total Penalties: $211,351 · last Sep 18, 2012
Registry ID: 110009506347

How This Compares

#2 of 213 TRI reporters in UT

#1 of 16,877 TRI reporters in Manufacturing

Ranked by most recent year's total TRI releases.

TRI Toxic Chemical Releases

Annual pounds of each toxic chemical released to air, water, and land, as reported to the EPA Toxic Release Inventory. Carcinogen (♦) and PFAS designations are per EPA and IARC classifications.

Emissions Trend (2015–2024) -61% overall

Year	Total Releases (lbs)	vs Prior Year
2015	42,354,088	—
2016	47,702,283	+13%
2017	33,304,111	-30%
2018	32,251,584	-3%
2019	98,312	-100%
2020	33,255,070	+33726%
2021	28,084,176	-16%
2022	19,218,552	-32%
2023	18,117,174	-6%
2024	16,634,119	-8%

2024

Chemical	Total (lbs)	Air	Water	Land	Off-Site
Copper compounds	7,499,857	121,498	116	7,378,243	4,285,868
Zinc compounds	3,847,205	1,076	22	3,846,106	15,833
Lead compounds	2,654,121	12,225	53	2,641,844	167,619
Arsenic compounds	1,753,268	3,913	175	1,749,180	87,877	♦ Carcinogen
Chromium compounds (except for chromite ore mined in the Transvaal Region)	234,481	222	500	233,759	515
Nitrate compounds (water dissociable; reportable only when in aqueous solution)	132,405	—	1,000	131,405	—
Antimony compounds	124,193	209	500	123,484	1,583
Nickel compounds	101,626	334	116	101,176	1,583	♦ Carcinogen
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	88,319	88,319	—	—	422
Selenium compounds	45,722	717	364	44,642	26,744
Ammonia	43,895	9,470	500	33,925	1
Manganese compounds	30,657	151	500	30,006	1,601
Vanadium compounds	30,618	118	500	30,001	1,583
Cadmium compounds	25,215	128	—	25,087	2,081	♦ Carcinogen
Thallium compounds	14,397	55	500	13,842	1,584
Silver compounds	3,141	313	500	2,328	1,466
Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	2,433	329	—	2,103	1,507
Thiourea	1,879	—	—	1,879	—	♦ Carcinogen
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	658	658	—	—	—
Mercury compounds	28	12	0	16	44

2023

Chemical	Total (lbs)	Air	Water	Land	Off-Site
Ethylene glycol	—	—	—	—	13,903
Copper compounds	9,804,682	69,611	165	9,734,906	632
Zinc compounds	3,396,344	903	86	3,395,355	3,396
Lead compounds	2,611,210	3,569	60	2,607,581	5,990
Arsenic compounds	1,447,936	1,337	504	1,446,095	194	♦ Carcinogen
Nickel compounds	222,881	354	188	222,339	343	♦ Carcinogen
Chromium compounds (except for chromite ore mined in the Transvaal Region)	186,731	492	500	185,739	67
Nitrate compounds (water dissociable; reportable only when in aqueous solution)	91,485	—	1,000	90,485	—
Antimony compounds	90,175	81	500	89,594	343
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	87,103	87,103	—	—	110
Selenium compounds	38,589	335	305	37,949	1,115
Vanadium compounds	35,651	152	500	34,999	339
Ammonia	34,841	7,939	500	26,402	78
Manganese compounds	30,680	175	500	30,005	346
Cadmium compounds	21,557	156	3	21,398	54	♦ Carcinogen
Thallium compounds	8,956	53	500	8,403	343
Silver compounds	4,169	221	500	3,448	71
Thiourea	2,076	—	—	2,076	—	♦ Carcinogen
Mercury compounds	1,574	8	—	1,566	20
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	533	533	—	—	—

2022

Chemical	Total (lbs)	Air	Water	Land	Off-Site
Ethylene glycol	—	—	—	—	2,398
Copper compounds	8,895,419	89,695	118	8,805,606	393
Zinc compounds	4,525,584	1,170	3	4,524,411	2,198
Lead compounds	3,128,501	7,595	45	3,120,861	50
Arsenic compounds	1,807,960	2,296	196	1,805,468	49	♦ Carcinogen
Nickel compounds	223,262	836	77	222,349	220	♦ Carcinogen
Chromium compounds (except for chromite ore mined in the Transvaal Region)	183,435	923	500	182,012	23
Antimony compounds	126,808	148	500	126,160	220
Nitrate compounds (water dissociable; reportable only when in aqueous solution)	94,701	—	1,000	93,701	—
Selenium compounds	52,173	533	160	51,480	24
Cadmium compounds	43,368	124	—	43,244	24	♦ Carcinogen
Manganese compounds	30,697	183	500	30,014	220
Vanadium compounds	30,644	143	500	30,001	220
Ammonia	30,391	6,601	500	23,290	1
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	25,254	25,254	—	—	—
Thallium compounds	11,199	28	500	10,671	220
Silver compounds	3,714	247	500	2,967	22
Mercury compounds	3,554	6	—	3,548	11
Thiourea	1,342	—	—	1,342	612	♦ Carcinogen
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	545	545	—	—	—

2021

Chemical	Total (lbs)	Air	Water	Land	Off-Site
Copper compounds	15,353,893	39,497	118	15,314,278	338
Zinc compounds	6,752,218	1,142	29	6,751,047	391
Lead compounds	3,208,012	5,487	51	3,202,474	32
Arsenic compounds	1,809,459	1,662	230	1,807,567	25	♦ Carcinogen
Nickel compounds	224,051	1,607	109	222,335	39	♦ Carcinogen
Chromium compounds (except for chromite ore mined in the Transvaal Region)	189,861	1,075	500	188,286	20
Nitrate compounds (water dissociable; reportable only when in aqueous solution)	146,727	—	1,000	145,727	—
Antimony compounds	144,245	85	500	143,660	39
Cadmium compounds	68,185	220	—	67,965	20	♦ Carcinogen
Ammonia	47,013	9,199	500	37,314	—
Selenium compounds	40,645	274	228	40,143	21
Vanadium compounds	34,932	178	500	34,254	39
Manganese compounds	30,821	320	500	30,001	39
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	20,513	20,513	—	—	—
Thallium compounds	5,566	70	500	4,996	39
Silver compounds	4,886	187	500	4,199	5
Thiourea	2,578	—	—	2,578	—	♦ Carcinogen
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	545	545	—	—	—
Mercury compounds	25	5	0	20	2

2020

Chemical	Total (lbs)	Air	Water	Land	Off-Site
Ethylene glycol	—	—	—	—	900
Copper compounds	13,953,186	77,220	271	13,875,695	516
Zinc compounds	10,477,586	3,795	78	10,473,713	997
Lead compounds	4,603,355	11,993	65	4,591,297	120
Arsenic compounds	3,081,978	11,067	636	3,070,275	108	♦ Carcinogen
Chromium compounds (except for chromite ore mined in the Transvaal Region)	337,332	103	500	336,729	110
Nickel compounds	222,761	239	177	222,345	102	♦ Carcinogen
Antimony compounds	199,257	175	500	198,582	102
Cadmium compounds	99,046	84	—	98,962	102	♦ Carcinogen
Nitrate compounds (water dissociable; reportable only when in aqueous solution)	83,886	—	1,000	82,886	—
Ammonia	45,887	7,916	500	37,471	—
Selenium compounds	39,200	717	379	38,104	103
Vanadium compounds	35,586	66	500	35,020	99
Manganese compounds	30,588	78	500	30,010	102
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	24,330	24,330	—	—	—
Thallium compounds	14,598	54	500	14,044	102
Silver compounds	4,826	247	500	4,079	15
Thiourea	1,143	—	—	1,143	—	♦ Carcinogen
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	504	504	—	—	26,067
Mercury compounds	21	2	2	17	9

2019

Chemical	Total (lbs)	Air	Water	Land	Off-Site
Thallium compounds	54,215	118	500	53,597	25
Ammonia	43,593	10,148	500	32,945	—
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	504	504	—	—	7

2018

Chemical	Total (lbs)	Air	Water	Land	Off-Site
Copper compounds	16,523,751	39,492	121	16,484,138	23
Zinc compounds	7,290,414	1,074	107	7,289,233	178
Lead compounds	5,361,348	15,055	57	5,346,236	41,493
Arsenic compounds	1,889,374	3,646	338	1,885,390	610	♦ Carcinogen
Chromium compounds (except for chromite ore mined in the Transvaal Region)	303,042	145	500	302,397	18
Nickel compounds	222,722	226	159	222,337	18	♦ Carcinogen
Antimony compounds	146,031	121	500	145,410	18
Nitrate compounds (water dissociable; reportable only when in aqueous solution)	124,806	—	1,000	123,806	—
Cadmium compounds	103,554	371	1	103,182	18	♦ Carcinogen
Selenium compounds	103,113	583	394	102,136	18
Ammonia	61,061	10,096	500	50,465	2
Vanadium compounds	30,789	235	500	30,054	18
Manganese compounds	30,627	125	500	30,002	18
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	27,435	27,435	—	—	41
Thallium compounds	23,804	159	500	23,145	18
Silver compounds	5,790	201	500	5,089	2
Thiourea	3,354	—	—	3,354	—	♦ Carcinogen
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	504	504	—	—	—
Mercury compounds	65	15	1	49	1

2017

Chemical	Total (lbs)	Air	Water	Land	Off-Site
Copper compounds	17,978,300	22,229	281	17,955,790	246
Zinc compounds	6,807,444	897	100	6,806,447	620
Lead compounds	4,949,778	12,029	67	4,937,682	4,885
Arsenic compounds	2,410,898	3,264	368	2,407,266	66	♦ Carcinogen
Chromium compounds (except for chromite ore mined in the Transvaal Region)	316,944	219	500	316,225	76
Nickel compounds	222,815	245	234	222,336	66	♦ Carcinogen
Nitrate compounds (water dissociable; reportable only when in aqueous solution)	146,727	—	1,000	145,727	—
Antimony compounds	137,233	107	500	136,626	66
Selenium compounds	79,921	374	446	79,101	66
Cadmium compounds	60,958	249	28	60,681	72	♦ Carcinogen
Ammonia	47,253	9,385	500	37,368	—
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	37,009	37,009	—	—	—
Vanadium compounds	32,101	93	500	31,508	62
Manganese compounds	30,669	168	500	30,001	66
Thallium compounds	29,964	217	500	29,247	66
Silver compounds	8,912	178	500	8,234	10
Thiourea	5,886	—	—	5,886	—	♦ Carcinogen
Cresol (mixed isomers)	750	250	250	250	—
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	506	506	—	—	3
Mercury compounds	43	7	—	36	47

2016

Chemical	Total (lbs)	Air	Water	Land	Off-Site
Ethylene glycol	—	—	—	—	469
Copper compounds	22,855,884	30,944	220	22,824,720	12
Zinc compounds	15,957,451	1,624	220	15,955,607	125
Lead compounds	4,583,257	11,052	73	4,572,132	12
Arsenic compounds	3,018,714	3,405	356	3,014,953	12	♦ Carcinogen
Chromium compounds (except for chromite ore mined in the Transvaal Region)	435,486	463	500	434,523	12
Nickel compounds	223,000	380	285	222,335	12	♦ Carcinogen
Antimony compounds	184,140	149	500	183,491	12
Cadmium compounds	89,007	685	66	88,256	12	♦ Carcinogen
Nitrate compounds (water dissociable; reportable only when in aqueous solution)	84,178	—	1,000	83,178	—
Ammonia	66,596	9,749	500	56,347	1
Silver compounds	52,955	237	500	52,218	1
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	39,943	39,943	—	—	—
Selenium compounds	31,732	565	392	30,775	12
Manganese compounds	30,670	169	500	30,001	12
Vanadium compounds	30,653	153	500	30,000	12
Thallium compounds	15,676	216	500	14,960	12
Thiourea	1,584	—	—	1,584	—	♦ Carcinogen
Cresol (mixed isomers)	750	250	250	250	—
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	506	506	—	—	—
Mercury compounds	101	12	—	89	1

2015

Chemical	Total (lbs)	Air	Water	Land	Off-Site
Ethylene glycol	—	—	—	—	—
Zinc compounds	17,902,014	1,105	178	17,900,731	240
Copper compounds	15,854,932	40,155	218	15,814,559	33
Lead compounds	4,665,516	6,842	17	4,658,657	24
Arsenic compounds	2,810,360	1,682	615	2,808,063	77	♦ Carcinogen
Chromium compounds (except for chromite ore mined in the Transvaal Region)	317,315	178	500	316,637	24
Nickel compounds	222,718	210	172	222,336	24	♦ Carcinogen
Antimony compounds	171,329	70	500	170,759	24
Cadmium compounds	74,959	123	26	74,810	24	♦ Carcinogen
Nitrate compounds (water dissociable; reportable only when in aqueous solution)	67,518	—	1,000	66,518	—
Ammonia	61,579	14,958	500	46,121	209
Selenium compounds	52,665	233	509	51,923	24
Thallium compounds	43,519	158	500	42,861	24
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	35,741	35,741	—	—	—
Vanadium compounds	30,686	186	500	30,000	24
Manganese compounds	30,641	140	500	30,001	24
Silver compounds	8,433	166	500	7,767	2
Thiourea	3,569	—	—	3,569	—	♦ Carcinogen
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	507	507	—	—	—
Mercury compounds	87	14	—	73	1

Waste Management & Recycling

How this facility manages toxic chemicals beyond direct releases — through recycling, energy recovery, and on-site or off-site treatment. Data from the most recent TRI reporting year. Quantities in pounds.

Chemical	Released	Recycled	Energy Recovery	Treated
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	—	—	—	250
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	—	—	—	872
Ammonia	—	—	—	250

Off-Site Transfer Destinations

Facilities to which toxic chemicals were transferred for disposal, recycling, energy recovery, or treatment during the most recent TRI reporting year. Quantities in pounds.

Destination	Chemical	Disposal	Recycling	Energy Rec.	Treatment
CLEAN HARBORS GRASSY MOUNTAIN KNOLLS, UT	Antimony compounds	1,583	—	—	—
CLEAN HARBORS GRASSY MOUNTAIN KNOLLS, UT	Arsenic compounds	87,877	—	—	—
CLEAN HARBORS GRASSY MOUNTAIN KNOLLS, UT	Cadmium compounds	2,081	—	—	—
US ECOLOGY IDAHO INC SITE B GRAND VIEW, ID	Copper compounds	5	—	—	—
CLEAN HARBORS GRASSY MOUNTAIN KNOLLS, UT	Copper compounds	4,285,863	—	—	—
CLEAN HARBORS GRASSY MOUNTAIN KNOLLS, UT	Silver compounds	1,466	—	—	—
CLEAN HARBORS GRASSY MOUNTAIN KNOLLS, UT	Thallium compounds	1,584	—	—	—
CLEAN HARBORS GRASSY MOUNTAIN KNOLLS, UT	Vanadium compounds	1,583	—	—	—
CLEAN HARBORS GRASSY MOUNTAIN KNOLLS, UT	Zinc compounds	15,833	—	—	—
CLEAN HARBORS GRASSY MOUNTAIN KNOLLS, UT	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	1,506	—	—	—
US ECOLOGY IDAHO INC SITE B GRAND VIEW, ID	Barium compounds (except for barium sulfate (CAS No. 7727-43-7))	1	—	—	—
US ECOLOGY IDAHO INC SITE B GRAND VIEW, ID	Ammonia	1	—	—	—
CLEAN HARBORS GRASSY MOUNTAIN KNOLLS, UT	Chromium compounds (except for chromite ore mined in the Transvaal Region)	515	—	—	—
CLEAN HARBORS GRASSY MOUNTAIN KNOLLS, UT	Lead compounds	167,619	—	—	—
CLEAN HARBORS GRASSY MOUNTAIN KNOLLS, UT	Manganese compounds	1,583	—	—	—
US ECOLOGY IDAHO INC SITE B GRAND VIEW, ID	Manganese compounds	17	—	—	—
CLEAN HARBORS GRASSY MOUNTAIN KNOLLS, UT	Mercury compounds	44	—	—	—
CLEAN HARBORS GRASSY MOUNTAIN KNOLLS, UT	Nickel compounds	1,583	—	—	—
CLEAN HARBORS GRASSY MOUNTAIN KNOLLS, UT	Selenium compounds	26,744	—	—	—
US ECOLOGY IDAHO INC SITE B GRAND VIEW, ID	Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)	50	—	—	—

Compliance Violations

Individual permit violations recorded by the EPA across air, water, and hazardous waste programs. Open violations are unresolved as of the most recent ECHO data update.

Program	Type	Violation Date	Return to Compliance	Status
rcra	Standards Applicable to Generators of HW: General	Mar 1, 2023	Mar 22, 2023	Resolved
rcra	ID and Listing of HW: General	Sep 29, 2020	Sep 3, 2021	Resolved
rcra	Standards Applicable to Generators of HW: Preparedness. Prevention, and Emergency Procedures for LQGs	Sep 29, 2020	May 14, 2021	Resolved
rcra	Standards Applicable to Generators of HW: Pre-Transport Requirements Applicable to Small and Large Quantity Generators	Mar 27, 2012	Mar 29, 2012	Resolved
rcra	Standards for Owners and Operators of HW TSDs: Use and Management of Containers	Feb 14, 2007	Feb 19, 2007	Resolved
rcra	Interim Status Standards for Owners and Operators of HW TSDs: Use and Management of Containers	Feb 13, 2007	Feb 13, 2007	Resolved
rcra	Standards for Owners and Operators of HW TSDs: Use and Management of Containers	Feb 13, 2007	Feb 13, 2007	Resolved
rcra	Standards Applicable to Generators of HW: General	Apr 29, 1999	May 29, 1999	Resolved
rcra	Standards Applicable to Generators of HW: General	Dec 27, 1993	Jan 15, 1994	Resolved
rcra	Standards Applicable to Generators of HW: Manifest Requirements Applicable to Small and Large Quantity Generators	Jun 30, 1992	Aug 3, 1992	Resolved
rcra	Standards Applicable to Generators of HW: General	Jun 30, 1992	Aug 3, 1992	Resolved
rcra	Standards for Owners and Operators of HW TSDs: Manifest System, Recordkeeping and Reporting	Apr 1, 1992	Aug 30, 1992	Resolved

Enforcement Actions

Formal enforcement cases brought by the EPA or state agencies, including administrative orders and civil penalties assessed. Penalty amounts reflect what was formally assessed, not necessarily what was collected.

Administrative - Formal

· Case 08-2026-0101 · Jan 20, 2026

Administrative - Formal

· Case 08-2025-0185 · Sep 29, 2025

$211,351

WRITTEN INFORMAL

RCRA (Hazardous Waste) · Case RCRA-UTD000826412-001 · Apr 15, 2021

Administrative - Formal

· Case 08-2012-0133 · Sep 18, 2012

$2,640

Administrative - Formal

· Case 08-2008-0127 · May 22, 2008

VERBAL INFORMAL

RCRA (Hazardous Waste) · Case RCRA-UTD000826446-001 · Mar 28, 2007

INITIAL 3008(A) COMPLIANCE

RCRA (Hazardous Waste) · Case RCRA-UTD000826446-000 · Dec 27, 1993

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