Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
MERSEN USA GS CORP. - ST MARYS
1032 TROUT RUN RD, SAINT MARYS, PA, 15857
Parent company: MERSEN USA BN 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 | Polycyclic aromatic compounds | Copper | Naphthalene | Phenanthrene | Benzo[g,h,i]perylene | Total (lbs) |
| 2024 | 274 | 8 | 52 | — | 3 | 340 |
| 2023 | 353 | 4 | 62 | — | 4 | 426 |
| 2022 | 386 | 4 | 51 | — | 3 | 446 |
| 2021 | 262 | 4 | 40 | — | 4 | 312 |
| 2020 | 230 | 7 | — | — | 1 | 240 |
| 2019 | 426 | 4 | 42 | 54 | 3 | 528 |
| 2018 | 766 | 4 | 83 | 155 | 6 | 1,070 |
| 2017 | 328 | 11 | — | — | 22 | 373 |
| 2016 | 211 | — | — | — | 17 | 249 |
| 2015 | 193 | 11 | — | — | 24 | 238 |
| 2014 | 238 | 9 | — | — | 27 | 279 |
| 2013 | 34 | 16 | — | — | 4 | 59 |
| 2012 | 172 | — | — | 16 | 4 | 196 |
| 2011 | — | 16 | — | — | — | 41 |
| 2010 | — | 13 | — | — | — | 14 |
| 2009 | — | 8 | — | — | — | 8 |
| 2008 | — | 12 | — | — | — | 13 |
| 2007 | — | 19 | — | — | — | 20 |
| 2006 | — | 12 | — | — | — | 12 |
| 2005 | — | 24 | — | — | — | 25 |
| 2004 | — | 5 | — | — | — | 6 |
| 2003 | — | 4 | — | — | — | 5 |
| 2002 | 2,861 | 1,740 | — | — | — | 4,601 |
| 2001 | 4,887 | 250 | — | — | — | 5,137 |
| 2000 | 5,200 | 4 | — | — | — | 5,204 |
| 1999 | 1,576 | 577 | — | — | — | 2,153 |
| 1998 | 1,751 | 1,524 | — | — | — | 3,275 |
| 1997 | 7,091 | — | — | — | — | 7,091 |
| 1996 | 8,370 | — | — | — | — | 8,370 |
| 1995 | 6,664 | 715 | — | — | — | 7,379 |
| 1994 | — | 4,630 | — | — | — | 4,630 |
| 1992 | — | 250 | — | — | — | 250 |
▎ 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.