Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
PROTO CIRCUIT INC
2035 MIDWAY DR, TWINSBURG, OH, 44087
Parent company: NA
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 | Ammonia | Copper | Copper compounds | Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | Total (lbs) | |
| 1999 | 250 | — | — | — | 250 | |
| 1998 | 250 | 750 | 750 | — | 1,750 | |
| 1997 | 250 | 750 | 750 | — | 1,750 | |
| 1996 | 20,853 | — | — | — | 20,853 | |
| 1995 | 14,360 | — | — | — | 14,360 | |
| 1994 | 13,600 | — | — | 500 | 14,100 | |
| 1993 | 14,308 | — | — | 500 | 14,808 | |
| 1992 | 12,850 | — | — | 500 | 13,350 | |
| 1991 | 11,250 | — | — | — | 11,250 | |
| 1990 | 16,250 | — | — | — | 16,250 | |
| 1989 | 12,250 | — | — | — | 12,250 | |
▎ 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.