Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
PREMIER CASTINGS
400 E FRISCO, BLACKWELL, OK, 74631
Parent company: NA
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 | Manganese compounds | 1,2,4-Trimethylbenzene | 4,4'-Methylenedi(phenyl isocyanate) | Total (lbs) | ||
| 1995 | 1,820 | — | — | 1,820 | ||
| 1994 | 1,820 | — | — | 1,820 | ||
| 1993 | 1,820 | 1,236 | — | 3,056 | ||
| 1992 | 1,820 | 1,311 | 250 | 3,381 | ||
| 1991 | — | — | 5 | 5 | ||
▎ 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.