Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
HARTWELL CORP
900 S RICHFIELD RD, PLACENTIA, CA, 92870
Parent company: WESTERN SKY INDS
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 | 1,1,1-Trichloroethane | Total (lbs) | ||||
| 1995 | 6,105 | 6,105 | ||||
| 1994 | 4,995 | 4,995 | ||||
| 1993 | 4,263 | 4,263 | ||||
| 1992 | 6,566 | 6,566 | ||||
| 1991 | 8,000 | 8,000 | ||||
| 1990 | 18,000 | 18,000 | ||||
| 1989 | 718 | 718 | ||||
▎ 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.