Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
KENNECOTT UTAH COPPER SMELTER & REFINERY
12000 WEST 2100 SOUTH & 11500 W 2100 S, MAGNA, UT, 84044
Parent company: NA
Carcinogen
PBT
— EPA classifications across all reporting years
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 compounds | Zinc compounds | Copper | Arsenic compounds | Lead compounds | Total (lbs) |
| 2024 | — | 3,847,204 | — | — | — | 16,634,119 |
| 2023 | — | 3,396,344 | — | — | — | 18,117,174 |
| 2022 | — | 4,525,584 | — | — | — | 19,218,552 |
| 2021 | 15,353,893 | 6,752,218 | — | 1,809,459 | 3,208,012 | 28,084,176 |
| 2020 | — | 10,477,586 | — | — | — | 33,255,070 |
| 2019 | 16,917,579 | 8,837,319 | — | 3,532,500 | 5,985,242 | 36,562,686 |
| 2018 | 16,523,751 | 7,290,414 | — | 1,889,374 | 5,361,348 | 32,251,584 |
| 2017 | 17,978,300 | 6,807,444 | — | 2,410,898 | 4,949,778 | 33,304,111 |
| 2016 | 22,855,884 | 15,957,451 | — | 3,018,714 | 4,583,257 | 47,702,283 |
| 2015 | 15,854,932 | 17,902,014 | — | 2,810,360 | 4,665,516 | 42,354,088 |
| 2014 | 11,091,623 | 5,744,913 | — | 3,444,725 | 3,876,117 | 25,326,926 |
| 2013 | 9,127,644 | 4,509,220 | — | 2,583,531 | 1,997,713 | 19,142,585 |
| 2012 | 8,071,281 | 4,176,625 | — | 2,492,347 | 3,197,057 | 19,051,301 |
| 2011 | 11,335,513 | 5,599,106 | — | 2,618,213 | 2,679,438 | 23,444,819 |
| 2010 | 11,145,110 | 4,528,980 | — | 3,623,570 | 3,096,914 | 23,981,968 |
| 2009 | 11,669,366 | 3,634,911 | — | 3,718,783 | 2,705,559 | 23,036,593 |
| 2008 | 8,337,349 | 5,200,773 | — | 3,404,280 | 2,866,442 | 21,090,516 |
| 2007 | 4,576,961 | 4,000,944 | — | 2,702,405 | 2,688,072 | 15,780,479 |
| 2006 | 6,080,090 | 3,970,326 | — | 2,412,920 | 2,611,500 | 17,198,509 |
| 2005 | 7,894,950 | 11,013,050 | — | 4,339,700 | 5,368,063 | 30,129,719 |
| 2004 | 9,353,150 | 7,408,600 | — | 6,010,100 | 4,019,466 | 29,823,397 |
| 2003 | 8,081,955 | 5,608,150 | — | 5,405,481 | 4,209,505 | 25,675,841 |
| 2002 | 12,415,600 | 5,310,150 | — | 2,813,850 | 3,721,882 | 25,220,896 |
| 2001 | 14,457,750 | 5,232,800 | — | 2,922,800 | 2,874,480 | 27,830,109 |
| 2000 | 31,020,350 | 5,585,450 | — | 6,619,250 | 3,953,900 | 54,147,990 |
| 1999 | 8,367,550 | 5,745,955 | — | 7,832,905 | 4,787,855 | 28,605,960 |
| 1998 | 11,085,300 | 7,357,450 | — | 6,231,700 | 5,384,450 | 33,924,485 |
| 1997 | 9,994,500 | 4,989,150 | — | 4,211,500 | 4,547,450 | 24,327,070 |
| 1996 | 5,318,750 | 2,202,400 | — | 663,305 | 858,005 | 9,360,290 |
| 1995 | 2,483,750 | 1,613,750 | — | 636,000 | 805,700 | 5,990,210 |
| 1994 | 4,540,805 | 2,720,105 | — | 1,218,800 | 1,380,155 | 10,460,875 |
| 1993 | 4,902,850 | 2,814,850 | — | 1,617,700 | 1,746,200 | 11,717,315 |
| 1992 | 4,065,500 | 1,813,000 | — | 1,719,200 | 1,147,300 | 10,223,075 |
| 1991 | 3,389,750 | 1,512,605 | — | 1,226,100 | 816,100 | 14,234,230 |
| 1990 | 3,369,650 | 2,013,605 | — | 1,320,955 | 1,239,150 | 9,694,735 |
| 1989 | — | 3,714,050 | 4,054,250 | 2,848,050 | — | 15,473,300 |
| 1988 | — | 781,750 | 4,217,150 | 2,615,800 | — | 11,393,850 |
| 1987 | — | — | 130,071,800 | 8,309,550 | — | 149,405,350 |
▎ 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.