Year-over-year total releases
Reported on-site TRI releases in pounds, grouped by reporting year.
Facility detail
PERMALOK-A NORTHWEST PIPE CO
472 PAUL AVE, SAINT LOUIS, MO, 63135
Parent company: NORTHWEST PIPE CO
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 | Manganese | Total |
|---|---|---|
| 2023 | 89 | 89 |
| 2022 | 160 | 160 |
| 2021 | 159 | 159 |
| 2020 | 158 | 158 |
| 2019 | 158 | 158 |
| 2018 | 66 | 66 |
| 2017 | 33 | 33 |
| 2016 | 250 | 250 |
| 2015 | 250 | 250 |
| 2014 | 100 | 100 |