Year-over-year total releases
Reported on-site TRI releases in pounds, grouped by reporting year.
Facility detail
WELLBORN INDUSTRIES LTD
1604 S PIERCE, MASON CITY, IA, 50401
Parent company: NA
Carcinogen
PBT
— EPA classifications across all reporting years
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 | Ammonia | Nitric acid | Trichloroethylene | Methyl ethyl ketone | Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | Total |
|---|---|---|---|---|---|---|
| 2002 | — | — | — | — | — | 0 |
| 2001 | — | — | — | — | — | 0 |
| 1999 | 185 | — | — | — | — | 185 |
| 1998 | 105 | — | — | — | — | 105 |
| 1997 | 145 | — | — | — | — | 145 |
| 1996 | 1,545 | — | — | — | — | 1,545 |
| 1994 | 9,387 | — | — | — | 1,000 | 10,387 |
| 1993 | 4,197 | — | — | — | 1,000 | 5,697 |
| 1992 | 1,546 | 755 | — | — | 1,000 | 3,801 |
| 1991 | — | 1,000 | — | — | 1,000 | 2,505 |
| 1990 | — | 1,000 | — | — | 1,000 | 2,505 |
| 1989 | — | 9,225 | 11,000 | 8,300 | — | 30,025 |
| 1988 | — | — | — | — | — | 1,500 |