Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
MASONITE CORP - 12TH ST FACILITY
1600 12TH ST NE, MASON CITY, IA, 50401
Parent company: MASONITE CORP.
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 | Xylene (mixed isomers) | 1,1,1-Trichloroethane | Methyl ethyl ketone | Total (lbs) | ||
| 2003 | — | — | 4,800 | 4,800 | ||
| 1997 | 11,293 | — | — | 11,293 | ||
| 1994 | 13,542 | — | — | 13,542 | ||
| 1993 | 20,449 | 750 | — | 21,199 | ||
| 1992 | — | 8,000 | — | 8,000 | ||
| 1991 | — | 9,100 | — | 9,100 | ||
| 1990 | — | 9,578 | — | 9,578 | ||
| 1989 | — | 5,704 | — | 5,704 | ||
| 1988 | — | 9,941 | — | 9,941 | ||
▎ 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.