Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
NORTHROP GRUMMAN NORDEN SYSTEMS
10 NORDEN PL, NORWALK, CT, 06856
Parent company: NORTHROP GRUMMAN SYS 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 | Freon 113 (CFC-113) | 1,1,1-Trichloroethane | Acetone | 1,1-Dichloro-1-fluoroethane (HCFC-141b) | Total (lbs) | |
| 1996 | — | — | — | 7,600 | 7,600 | |
| 1994 | 20,000 | — | — | — | 20,000 | |
| 1993 | 27,000 | — | — | — | 27,000 | |
| 1992 | 29,000 | — | — | — | 29,000 | |
| 1991 | 34,000 | 16,750 | — | — | 50,750 | |
| 1990 | 38,000 | 14,000 | — | — | 52,000 | |
| 1989 | 51,100 | 17,000 | — | — | 68,100 | |
| 1988 | 65,000 | 21,000 | — | — | 86,000 | |
| 1987 | — | — | 10,900 | — | 10,900 | |
▎ 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.