Year-over-year total releases
Reported on-site TRI releases in pounds, grouped by reporting year.
Facility detail
SHANNON GROUP INC TONKA DIV
2001 15TH ST SW, MASON CITY, IA, 50401
Parent company: NA
Top chemical totals
The 10 chemicals with the highest cumulative on-site releases 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.
| Year | Chlorodifluoromethane (HCFC-22) | Total |
|---|---|---|
| 1996 | 11,736 | 11,736 |
| 1995 | 16,797 | 16,797 |
| 1994 | 15,030 | 15,030 |