Year-over-year total releases
Reported on-site TRI releases in pounds, grouped by reporting year.
Facility detail
NORTHWEST PIPE CO
430 HAMILTON RD, BOSSIER CITY, LA, 71111
Parent company: NORTHWEST PIPE CO
Carcinogen
— EPA classifications across all reporting years
Top chemical totals
The 10 chemicals with the highest cumulative on-site releases 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.
| Year | Nickel | Manganese | Chromium | Total |
|---|---|---|---|---|
| 2013 | — | 41 | — | 41 |
| 2012 | — | 24 | — | 24 |
| 2011 | — | 5 | — | 5 |
| 1999 | 465 | 265 | 48 | 778 |