Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
MKS INSTRUMENTS INC
6 SHATTUCK RD, ANDOVER, MA, 01810
Parent company: NA
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) | Ammonia | Total (lbs) | |||
| 1992 | — | 5 | 5 | |||
| 1990 | 15,450 | 5 | 15,455 | |||
| 1989 | 22,000 | — | 22,000 | |||
| 1988 | 14,221 | — | 14,221 | |||
▎ 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.