Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
ALLIED-SIGNAL PRECISION PRODS, PLANT 2
934 WASHINGTON ST, NORWOOD, MA, 020629802
Parent company: NORTHROP GRUMMAN CORP
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 | Freon 113 (CFC-113) | Acetone | Total (lbs) | ||
| 1996 | 42,000 | 29,600 | — | 71,600 | ||
| 1995 | 31,000 | 24,960 | — | 55,960 | ||
| 1994 | 41,000 | 31,940 | — | 72,940 | ||
| 1993 | 67,002 | 37,400 | — | 104,402 | ||
| 1992 | 66,000 | 65,000 | — | 131,000 | ||
| 1991 | 55,320 | 88,680 | — | 144,000 | ||
| 1990 | 61,400 | 63,100 | — | 124,500 | ||
| 1989 | 79,100 | 76,700 | 5,500 | 161,300 | ||
| 1988 | 90,400 | — | — | 90,400 | ||
▎ 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.