Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
NORTHWEST ALUMINUM CO
3313 W SECOND ST, THE DALLES, OR, 97058
Parent company: NORTHWEST ALUMININUM CO 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 | Sodium hydroxide (solution) | Carbonyl sulfide | Chlorine | Hydrogen fluoride | Hexachloroethane | Total (lbs) |
| 2007 | — | — | 250 | — | — | 250 |
| 2006 | — | — | 250 | — | — | 250 |
| 2005 | — | — | 250 | — | — | 250 |
| 2004 | — | — | 500 | — | — | 500 |
| 2003 | — | — | 1,000 | — | — | 1,000 |
| 2002 | — | — | 250 | — | — | 250 |
| 2001 | — | — | 11,800 | — | — | 11,800 |
| 2000 | — | 350,806 | 31,323 | 19,024 | — | 408,579 |
| 1999 | — | 421,845 | 36,890 | 24,861 | — | 483,596 |
| 1998 | — | 464,812 | 55,049 | 26,405 | — | 546,266 |
| 1997 | — | 467,812 | 70,606 | 29,890 | — | 568,308 |
| 1996 | — | 476,908 | 37,450 | 34,892 | — | 549,250 |
| 1995 | — | — | 65,811 | 32,768 | — | 98,579 |
| 1994 | — | — | 85,349 | 26,921 | — | 112,270 |
| 1993 | — | — | 72,176 | 19,913 | — | 92,089 |
| 1992 | — | — | 70,320 | 10,776 | 12,480 | 93,576 |
| 1991 | — | — | 176,100 | 13,800 | 14,342 | 204,242 |
| 1990 | — | — | 321,700 | 19,000 | — | 343,350 |
| 1989 | — | — | 197,200 | 8,145 | — | 212,558 |
| 1988 | 2,589,000 | — | — | 8,565 | — | 2,597,653 |
| 1987 | — | — | 148,800 | 7,558 | — | 156,358 |
▎ 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.