Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
NORTHWEST PIPE CO
6307 TOLEDO, HOUSTON, TX, 77008
Parent company: NORTHWEST PIPE CO
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 | 1,1,1-Trichloroethane | Manganese | Total (lbs) | |||
| 2013 | — | 5 | 5 | |||
| 2012 | — | 5 | 5 | |||
| 2011 | — | 5 | 5 | |||
| 2010 | — | 5 | 5 | |||
| 2009 | — | 5 | 5 | |||
| 2008 | — | 5 | 5 | |||
| 2007 | — | 3 | 3 | |||
| 2006 | — | 12 | 12 | |||
| 2005 | — | 250 | 250 | |||
| 2000 | 4,234 | — | 4,234 | |||
| 1999 | — | 546 | 546 | |||
▎ 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.