Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
VIPER MINE
781 600TH ST, ELKHART, IL, 62634
Parent company: KNIGHT HAWK HOLDINGS LLC
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 | Manganese compounds | Zinc compounds | Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) | Vanadium compounds | Barium And Barium Compounds | Total (lbs) |
| 2024 | — | — | — | — | — | 627 |
| 2023 | — | — | — | — | — | 14,792 |
| 2022 | — | — | 21,007 | — | — | 43,194 |
| 2021 | — | — | — | — | 49,686 | 61,357 |
| 2020 | — | 16,621 | — | — | 46,514 | 77,189 |
| 2019 | — | 40,469 | — | — | 61,177 | 372,141 |
| 2018 | — | 129,792 | — | — | 100,663 | 252,043 |
| 2017 | 15,363 | 94,650 | 95,333 | — | — | 206,396 |
| 2016 | — | 52,098 | 53,066 | — | — | 105,748 |
| 2015 | 29,167 | 84,571 | 76,767 | — | — | 191,699 |
| 2014 | 48,094 | 135,007 | 107,047 | — | — | 291,795 |
| 2013 | 219,435 | 65,513 | 65,282 | 23,918 | — | 403,936 |
| 2012 | 185,102 | 42,207 | 55,411 | 18,468 | — | 314,921 |
| 2011 | 204,453 | 43,888 | 61,299 | 20,046 | — | 344,473 |
| 2010 | 227,439 | 70,474 | 67,610 | 25,130 | — | 422,005 |
| 2009 | 236,818 | — | 70,648 | 25,303 | — | 373,892 |
| 2008 | 228,606 | 61,588 | 68,167 | 24,039 | — | 421,440 |
| 2007 | 270,195 | 78,382 | 80,458 | 29,155 | — | 513,782 |
| 2006 | 236,533 | 63,189 | 70,527 | 24,802 | — | 435,328 |
| 2005 | 210,005 | 45,005 | 65,005 | 25,005 | — | 382,661 |
| 2004 | 215,250 | 50,005 | 65,005 | 25,005 | — | 394,050 |
| 2003 | 220,250 | 55,005 | 65,005 | 25,005 | — | 394,387 |
| 2002 | 300,250 | 70,005 | 65,005 | 30,005 | — | 514,432 |
| 2001 | 300,250 | 70,005 | 65,005 | 30,005 | — | 514,432 |
| 2000 | 211,251 | 49,818 | 56,124 | 21,640 | — | 361,644 |
| 1999 | 151,505 | 30,505 | 50,005 | — | — | 232,015 |
| 1998 | 184,120 | 40,010 | 50,010 | — | — | 285,400 |
▎ 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.