Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
M-TRON INDUSTRIES INC
E HWY 50, YANKTON, SD, 57078
Parent company: LYNCH 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 | Freon 113 (CFC-113) | Acetone | Total (lbs) | |||
| 1993 | — | 4,738 | 4,738 | |||
| 1990 | 10,040 | — | 10,040 | |||
| 1989 | 21,700 | — | 21,700 | |||
| 1987 | 27,000 | — | 27,000 | |||
▎ 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.