Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
POLYPORE INC
4601 S 3RD AVE, TUCSON, AZ, 857142899
Parent company: NA
Carcinogen
— 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 | Acetone | Dibutyl phthalate | 1,1,1-Trichloroethane | Toluene | C.I. Solvent Yellow 3 | Total (lbs) |
| 1992 | — | — | — | — | — | 5 |
| 1991 | 1 | 1 | 5 | 5 | — | 12 |
| 1990 | 5 | — | 5 | 5 | 5 | 20 |
| 1989 | 1,500 | 30 | 6 | 6 | — | 1,542 |
▎ 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.