Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
KOPPERS INC (SOMERVILLE TX)
290 COUNTY RD 423, SOMERVILLE, TX, 77879
Parent company: KOPPERS INC
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 | Creosote | Naphthalene | Xylene (mixed isomers) | Ethylbenzene | Polycyclic aromatic compounds | Total (lbs) |
| 2024 | 2,544 | — | — | — | 6 | 2,550 |
| 2023 | 3,303 | — | — | — | 6 | 3,309 |
| 2022 | 3,603 | — | — | — | 7 | 3,610 |
| 2021 | 3,304 | — | — | — | 6 | 3,310 |
| 2020 | 5,706 | — | — | — | 12 | 5,718 |
| 2019 | 5,904 | — | — | — | 13 | 5,917 |
| 2018 | 7,405 | — | — | — | 16 | 7,421 |
| 2017 | 7,505 | — | — | — | 16 | 7,521 |
| 2016 | 9,008 | — | — | — | 19 | 9,027 |
| 2015 | 6,381 | — | — | — | 11 | 6,392 |
| 2014 | 6,646 | — | — | — | 11 | 6,657 |
| 2013 | 6,886 | — | — | — | 11 | 6,897 |
| 2012 | 5,475 | — | — | — | 8 | 5,483 |
| 2011 | 3,513 | — | — | — | 8 | 3,520 |
| 2010 | 3,904 | — | — | — | 8 | 3,912 |
| 2009 | 6,825 | — | — | — | 4 | 6,829 |
| 2008 | 5,084 | — | — | — | 4 | 5,088 |
| 2007 | 8,808 | — | — | — | 8 | 8,816 |
| 2006 | 7,904 | — | — | — | 7 | 7,911 |
| 2005 | 8,509 | — | — | — | 8 | 8,517 |
| 2004 | 7,750 | — | — | — | 9 | 7,759 |
| 2003 | 7,750 | — | — | — | 234 | 7,986 |
| 2002 | 9,655 | — | — | — | 16 | 9,673 |
| 2001 | 6,907 | — | — | — | 8 | 6,915 |
| 2000 | 6,848 | — | — | — | 10 | 6,858 |
| 1999 | 18,487 | — | — | — | — | 18,487 |
| 1998 | 23,728 | — | — | — | — | 23,728 |
| 1997 | 26,247 | — | — | — | — | 26,247 |
| 1996 | 23,879 | — | — | — | — | 23,879 |
| 1995 | 11,910 | — | — | — | — | 11,910 |
| 1994 | 3,030 | — | 11,408 | 2,853 | — | 17,291 |
| 1993 | 3,022 | 14,463 | 11,570 | 2,893 | — | 31,948 |
| 1992 | 2,943 | 14,082 | 11,265 | 2,817 | — | 31,107 |
| 1991 | 1,712 | 8,191 | 6,553 | 1,638 | — | 18,094 |
| 1990 | 2,876 | 13,763 | 11,010 | 2,753 | — | 30,402 |
| 1989 | — | 8,402 | 6,722 | 1,680 | — | 16,804 |
| 1988 | — | 10,438 | — | 2,088 | — | 12,526 |
| 1987 | — | 16,624 | — | — | — | 16,624 |
▎ 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.