Year-over-year total releases
Reported on-site TRI releases in pounds, grouped by reporting year.
Facility detail
NORTHWEST PIPE CO
183 NORTHWEST DR, WASHINGTON, WV, 26181
Parent company: NA
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 | Xylene (mixed isomers) | Phosphorus (yellow or white) | Methanol | Manganese | Aluminum (fume or dust) | Total |
|---|---|---|---|---|---|---|
| 2024 | — | — | — | 36 | — | 36 |
| 2023 | — | — | — | 33 | — | 33 |
| 2022 | — | — | — | 38 | — | 38 |
| 2020 | — | — | — | 47 | — | 47 |
| 2019 | — | — | — | 9 | — | 9 |
| 2018 | — | — | — | 57 | — | 57 |
| 2016 | — | — | — | 25 | — | 25 |
| 2015 | — | — | — | 52 | — | 52 |
| 2014 | — | — | — | 883 | — | 883 |
| 2013 | — | — | — | 785 | — | 785 |
| 2012 | — | — | — | 745 | — | 745 |
| 2011 | — | — | — | 1,369 | — | 1,369 |
| 2010 | — | — | — | 3,215 | — | 3,220 |
| 2009 | — | — | — | 1,760 | — | 1,760 |
| 2008 | — | — | — | 1,344 | — | 1,359 |
| 2002 | — | — | — | — | — | 276 |
| 2001 | — | — | — | — | — | 255 |
| 2000 | — | — | — | — | — | 32 |
| 1999 | — | — | — | — | — | 21 |
| 1998 | — | — | — | — | — | 21 |
| 1996 | 12,317 | — | — | — | 2,795 | 15,612 |
| 1995 | 14,343 | 750 | — | — | 3,807 | 19,400 |
| 1994 | 12,834 | 6,981 | — | — | 750 | 21,565 |
| 1993 | 65,190 | 2,822 | 12,100 | — | 750 | 81,362 |
| 1992 | — | 2,822 | — | — | 750 | 6,894 |
| 1991 | — | — | — | — | — | 74 |
| 1990 | — | — | — | — | — | 55 |
| 1989 | — | — | — | — | — | 57 |
| 1988 | — | — | — | — | — | 80 |
| 1987 | — | — | — | — | — | 59 |