Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
HUGHES MISSILE SYSTEMS CO NAVAJO FACILITY
COALMINE RD, FORT DEFIANCE, AZ, 86504
Parent company: GENERAL DYNAMICS 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) | Methanol | Total (lbs) | |||
| 1992 | 52,794 | — | 52,794 | |||
| 1991 | 85,047 | — | 85,047 | |||
| 1990 | 119,250 | 7,256 | 126,506 | |||
| 1989 | 59,460 | 3,567 | 63,027 | |||
| 1988 | — | 16,313 | 16,313 | |||
▎ 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.