Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
KOPPERS INC.
3185 S COUNTY RD A, SUPERIOR, WI, 54880
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 | Creosote | Naphthalene | Dibenzofuran | Anthracene | Polycyclic aromatic compounds | Total (lbs) |
| 2005 | 2,010 | — | — | — | 1 | 2,011 |
| 2004 | 1,360 | — | — | — | 1 | 1,361 |
| 2003 | 2,465 | — | — | — | 2 | 2,467 |
| 2002 | 2,265 | — | — | — | 2 | 2,267 |
| 2001 | 1,281 | — | — | — | 1 | 1,282 |
| 2000 | 1,869 | — | — | — | 4 | 1,873 |
| 1999 | 4,436 | — | — | — | — | 4,436 |
| 1998 | 4,558 | — | — | — | — | 4,558 |
| 1997 | 5,562 | — | — | — | — | 5,562 |
| 1996 | 5,164 | — | — | — | — | 5,164 |
| 1995 | 4,400 | — | — | — | — | 4,400 |
| 1994 | 3,200 | — | — | — | — | 3,200 |
| 1993 | 3,300 | — | — | — | — | 3,300 |
| 1992 | 5,700 | — | — | — | — | 5,700 |
| 1991 | 2,530 | — | — | — | — | 2,530 |
| 1990 | 3,419 | — | — | — | — | 3,419 |
| 1989 | — | 611 | 72 | 36 | — | 719 |
| 1988 | — | 613 | 136 | — | — | 749 |
| 1987 | — | 4,110 | 464 | — | — | 4,574 |
▎ 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.