Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
TAMCO
12459 ARROW RT STE B, RANCHO CUCAMONGA, CA, 91739
Parent company: COMMERCIAL METALS CO
Carcinogen
PBT
— 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 | Zinc compounds | Zinc (fume or dust) | Lead compounds | Manganese compounds | Manganese | Total (lbs) |
| 2020 | — | — | — | — | 8 | 17 |
| 2019 | 240 | — | 66 | — | — | 461 |
| 2018 | 296 | — | 35 | 85 | — | 517 |
| 2017 | 22,910 | — | 516 | 1,779 | — | 25,590 |
| 2016 | 16,564 | — | 1,517 | 1,323 | — | 19,682 |
| 2015 | 16,629 | — | 1,451 | 1,321 | — | 19,691 |
| 2014 | 19,162 | — | 1,754 | 1,564 | — | 22,803 |
| 2013 | 15,545 | — | 1,422 | 1,195 | — | 18,423 |
| 2012 | 16,946 | — | 1,423 | 1,096 | — | 19,735 |
| 2011 | 10,163 | — | 834 | 643 | — | 11,659 |
| 2010 | 8,826 | — | 726 | 568 | — | 10,120 |
| 2009 | 5,792 | — | 78 | 46 | — | 6,003 |
| 2008 | 17,569 | — | 248 | 133 | — | 18,173 |
| 2007 | 21,169 | — | 1,509 | 1,086 | — | 24,137 |
| 2006 | 6,923 | — | 466 | 448 | — | 7,947 |
| 2005 | 6,413 | — | 515 | 513 | — | 7,554 |
| 2004 | 5,692 | — | 530 | 433 | — | 6,782 |
| 2003 | 6,247 | — | 461 | — | — | 6,872 |
| 2002 | 4,995 | — | 352 | — | — | 5,467 |
| 2001 | 4,475 | — | 327 | 468 | — | 5,379 |
| 2000 | 5,123 | — | 652 | 354 | — | 6,335 |
| 1999 | — | 5,837 | — | — | 391 | 7,191 |
| 1998 | — | 5,123 | — | — | 382 | 6,544 |
| 1997 | — | 5,392 | — | — | 369 | 6,719 |
| 1996 | — | 4,757 | — | — | 383 | 5,390 |
| 1995 | — | 3,052 | — | — | 250 | 3,802 |
| 1994 | — | 3,400 | — | — | 250 | 4,150 |
| 1993 | — | 3,365 | — | — | 250 | 4,115 |
| 1992 | 3,549 | — | 250 | 250 | — | 4,299 |
| 1991 | — | 2,479 | — | — | 2,191 | 5,170 |
| 1990 | 3,063 | — | 250 | 250 | — | 3,818 |
▎ 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.