Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
MOLYCORP METALS & ALLOYS INC
8220 W HARRISON ST, TOLLESON, AZ, 85353
Parent company: MOLYCORP MINERALS LLC
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 | Ammonium sulfate (solution) | Ammonium nitrate (solution) | Nitric acid | Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | Aluminum oxide (fibrous forms) | Total (lbs) |
| 1991 | — | — | 55 | — | — | 55 |
| 1990 | — | — | 500 | — | — | 1,000 |
| 1989 | 230,467 | 121,807 | 500 | — | — | 353,274 |
| 1988 | — | 69,600 | 15,500 | 39,000 | 1,400 | 125,500 |
| 1987 | 258,909 | 91,711 | 105,852 | — | — | 456,472 |
▎ 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.