Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
SIMPSON PAPER CO
100 ERIE ST, POMONA, CA, 91768
Parent company: SIMPSON INVESTMENT CO
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 | 1,2,4-Trimethylbenzene | Certain glycol ethers | Chlorine | Sodium hydroxide (solution) | Chlorine dioxide | Total (lbs) |
| 1994 | — | 263 | — | — | — | 263 |
| 1993 | — | 266 | — | — | — | 266 |
| 1992 | 3,445 | 268 | — | — | — | 3,713 |
| 1991 | 2,382 | — | — | — | — | 2,382 |
| 1990 | — | — | 250 | — | 5 | 255 |
| 1989 | — | — | 250 | — | 5 | 255 |
| 1988 | — | — | — | 25 | 5 | 30 |
▎ 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.