Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
USS MON VALLEY WORKS - IRVIN PLANT
CAMP HOLLOW RD, WEST MIFFLIN, PA, 15122
Parent company: US STEEL CORP
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 | Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | Ethylene | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | Zinc compounds | Certain glycol ethers | Total (lbs) |
| 2024 | 47,060 | 26,570 | — | 799 | — | 75,352 |
| 2023 | 44,013 | 22,716 | — | 407 | — | 68,060 |
| 2022 | 47,253 | 43,148 | — | 475 | — | 91,849 |
| 2021 | 55,500 | 50,164 | — | 454 | — | 107,043 |
| 2020 | 34,052 | 4,060 | — | 453 | — | 39,212 |
| 2019 | 88,326 | 259,573 | — | 564 | — | 349,308 |
| 2018 | 55,066 | 72,219 | — | 606 | — | 128,647 |
| 2017 | 48,009 | 38,000 | — | 399 | — | 86,897 |
| 2016 | 35,012 | 4,300 | — | 386 | — | 40,232 |
| 2015 | 42,012 | 33,000 | — | 494 | — | 76,106 |
| 2014 | 62,016 | 87,000 | 52,000 | 550 | — | 202,440 |
| 2013 | 60,000 | 45,000 | 52,000 | 495 | — | 158,266 |
| 2012 | 50,000 | 23,000 | 59,000 | 471 | — | 133,465 |
| 2011 | 46,000 | 12,000 | 64,000 | 487 | — | 123,580 |
| 2010 | 47,000 | 17,000 | 58,000 | 446 | — | 123,369 |
| 2009 | 32,000 | 3,900 | 51,000 | 640 | — | 88,308 |
| 2008 | 46,000 | 21,000 | 12,000 | 1,172 | — | 81,127 |
| 2007 | 46,000 | 7,800 | 11,000 | 1,053 | — | 66,926 |
| 2006 | 46,000 | 7,800 | 8,800 | 1,159 | — | 64,874 |
| 2005 | 48,000 | 27,000 | 10,000 | 4,076 | — | 91,391 |
| 2004 | 63,000 | 13,000 | 10,000 | 1,001 | — | 87,928 |
| 2003 | 59,000 | 14,000 | 7,800 | 1,659 | — | 83,356 |
| 2002 | 53,000 | 17,000 | 9,100 | 845 | — | 80,915 |
| 2001 | 2,900 | 19,000 | — | 892 | — | 23,678 |
| 2000 | 15,000 | 21,000 | — | 1,064 | — | 38,105 |
| 1999 | 37,000 | 10,000 | — | 453 | — | 48,112 |
| 1998 | 38,000 | 25,000 | — | 470 | — | 63,888 |
| 1997 | 37,000 | 11,000 | — | 553 | — | 48,934 |
| 1996 | 77,000 | 13,000 | — | 485 | — | 90,749 |
| 1995 | 76,000 | 47,000 | — | 52,168 | 18,180 | 194,657 |
| 1994 | 30,000 | — | — | 54,448 | — | 85,544 |
| 1993 | 6,400 | — | — | 845 | — | 7,398 |
| 1992 | 16 | — | — | 1,115 | — | 1,472 |
| 1991 | 29,000 | — | — | 872 | — | 30,509 |
| 1990 | 33,000 | — | — | 1,260 | — | 34,883 |
| 1988 | 12,000 | — | — | 5,000 | — | 21,827 |
| 1987 | — | — | — | — | — | 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.