Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
STELLAR INDUSTRIES INC. - MASON CITY PLANT
2421 15TH ST SW, MASON CITY, IA, 50401
Parent company: STELLAR INDUSTRIES INC
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 | 1,1,1-Trichloroethane | Toluene | Chlorodifluoromethane (HCFC-22) | Trichlorofluoromethane (CFC-11) | Dichloromethane | Total (lbs) |
| 2024 | — | — | — | — | — | 0 |
| 2006 | — | — | 676 | — | — | 676 |
| 2005 | — | — | 1,194 | — | — | 1,194 |
| 2004 | — | — | 1,179 | — | — | 1,179 |
| 2003 | — | — | 1,196 | — | — | 1,196 |
| 2002 | — | — | 1,208 | — | — | 1,208 |
| 2001 | — | — | 1,367 | — | — | 1,367 |
| 2000 | — | — | 1,570 | — | — | 1,570 |
| 1999 | — | — | 1,580 | — | — | 1,580 |
| 1998 | — | — | 1,521 | — | — | 1,521 |
| 1997 | — | — | 1,695 | — | — | 1,695 |
| 1996 | — | — | 1,420 | — | — | 1,810 |
| 1995 | — | — | 1,107 | — | — | 1,428 |
| 1993 | — | — | — | — | — | 275 |
| 1992 | 19,588 | — | — | — | 4,040 | 23,827 |
| 1991 | 16,174 | — | — | 12,312 | 2,788 | 38,355 |
| 1990 | 14,167 | — | — | — | 3,036 | 17,203 |
| 1987 | — | 25,000 | — | — | — | 25,000 |
▎ 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.