Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
KEYSTONE POWDERED METAL CO
250 OLD MURDOCK RD, TROUTMAN, NC, 28166
Parent company: KEYSTONE POWDERED METAL CO
Carcinogen
— EPA classifications across all reporting years
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 | Methanol | Chromium | Copper | Nickel | Total (lbs) | |
| 2024 | — | — | 19 | 6 | 25 | |
| 2023 | — | — | 18 | 4 | 23 | |
| 2022 | — | — | 19 | 5 | 23 | |
| 2021 | 204 | — | — | — | 204 | |
| 2020 | 204 | — | — | — | 204 | |
| 2019 | 66 | — | — | — | 66 | |
| 2018 | 171 | — | — | — | 171 | |
| 2017 | 204 | — | — | — | 204 | |
| 2016 | 204 | — | — | — | 204 | |
| 2015 | 204 | — | — | — | 204 | |
| 2014 | 204 | — | — | — | 204 | |
| 2013 | 195 | — | — | — | 195 | |
| 2012 | 187 | — | — | — | 187 | |
| 2011 | 204 | — | — | — | 204 | |
| 2010 | 220 | — | — | — | 220 | |
| 2009 | 172 | — | — | — | 172 | |
| 2008 | 286 | — | — | — | 286 | |
| 2007 | 755 | — | — | — | 755 | |
| 2006 | 255 | — | — | — | 255 | |
| 2005 | 250 | — | — | — | 250 | |
| 2004 | 250 | — | — | — | 250 | |
| 2002 | 250 | — | — | — | 250 | |
| 2000 | 250 | — | 4 | — | 254 | |
| 1999 | 750 | — | 4 | — | 754 | |
| 1998 | 250 | — | 4 | — | 254 | |
| 1997 | 250 | 3,800 | 4 | — | 4,054 | |
| 1996 | 250 | — | 3,300 | — | 3,550 | |
▎ 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.