Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
NORTHWEST PIPE CO
509 BURLINGTON DR, SAGINAW, TX, 76179
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 | Manganese | Total (lbs) | ||||
| 2019 | 19 | 19 | ||||
| 2018 | 10 | 10 | ||||
| 2017 | 10 | 10 | ||||
| 2016 | 18 | 18 | ||||
| 2015 | 32 | 32 | ||||
| 2014 | 33 | 33 | ||||
| 2013 | 535 | 535 | ||||
| 2012 | 9 | 9 | ||||
| 2011 | 86 | 86 | ||||
| 2010 | 38 | 38 | ||||
| 2009 | 7 | 7 | ||||
| 1990 | 1,065 | 1,065 | ||||
▎ 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.