Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
ISOMEDIX OPERATIONS INC.
435 WHITNEY ST, NORTHBOROUGH, MA, 01532
Parent company: STERIS CORP
Carcinogen
— EPA classifications across all reporting years
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 | Ethylene oxide | Total (lbs) | ||||
| 2024 | 45 | 45 | ||||
| 2023 | 53 | 53 | ||||
| 2022 | 62 | 62 | ||||
| 2005 | 1,688 | 1,688 | ||||
| 2004 | 1,646 | 1,646 | ||||
| 2003 | 389 | 389 | ||||
| 2002 | 323 | 323 | ||||
| 2001 | 1,520 | 1,520 | ||||
| 2000 | 502 | 502 | ||||
| 1999 | 574 | 574 | ||||
| 1998 | 635 | 635 | ||||
| 1997 | 709 | 709 | ||||
| 1996 | 595 | 595 | ||||
| 1995 | 500 | 500 | ||||
| 1994 | 500 | 500 | ||||
| 1993 | 500 | 500 | ||||
▎ 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.