Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
HEWLETT-PACKARD CO
175 WYMAN ST, WALTHAM, MA, 022549030
Parent company: HEWLETT-PACKARD 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 | 1,1,1-Trichloroethane | Ammonia | Toluene | Total (lbs) | ||
| 1990 | 27,868 | — | — | 27,868 | ||
| 1989 | 13,868 | 13,651 | 8,116 | 35,635 | ||
| 1988 | 26,090 | 6,250 | — | 32,340 | ||
▎ 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.