Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
NORTHWEST PIPE CO
6030 WASHINGTON ST, DENVER, CO, 80216
Parent company: NORTHWEST PIPE CO
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 | Xylene (mixed isomers) | 1,1,1-Trichloroethane | Dichloromethane | Manganese | Nickel | Total (lbs) |
| 2014 | — | — | — | 74 | — | 74 |
| 2013 | — | — | — | 399 | — | 399 |
| 2012 | — | — | — | 412 | — | 412 |
| 2011 | — | — | — | 540 | — | 540 |
| 2010 | — | — | — | 29 | — | 29 |
| 2009 | — | — | — | 250 | — | 250 |
| 2008 | — | — | — | 250 | 5 | 261 |
| 2007 | — | — | — | 250 | — | 255 |
| 2006 | — | — | — | 250 | 5 | 255 |
| 2005 | — | — | — | 250 | 250 | 505 |
| 2004 | — | — | — | 250 | 5 | 260 |
| 2003 | — | — | — | 250 | 5 | 260 |
| 2002 | — | — | — | 250 | 5 | 260 |
| 2001 | — | — | — | 250 | 5 | 260 |
| 2000 | — | 15,268 | 15,268 | — | — | 30,536 |
| 1999 | — | 15,010 | 15,010 | — | — | 30,020 |
| 1998 | — | 17,369 | 10,906 | 750 | — | 29,025 |
| 1997 | — | 23,614 | — | — | — | 23,614 |
| 1993 | 27,374 | — | — | 97 | — | 27,471 |
| 1992 | — | — | — | 86 | — | 86 |
| 1991 | 24,000 | — | — | 46 | — | 24,046 |
| 1990 | — | — | — | 250 | — | 250 |
| 1989 | 22,606 | — | — | 46 | — | 22,652 |
▎ 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.