Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
MATHESON TRI-GAS INC - LAPORTE BRANCH
1920 W FAIRMONT PKWY, LA PORTE, TX, 77571
Parent company: MATHESON TRI-GAS INC
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 | Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | Ammonia | Phosgene | Chlorine | Total (lbs) | |
| 2010 | — | 15 | — | — | 15 | |
| 2009 | — | 29 | — | — | 29 | |
| 2008 | — | 40 | — | — | 40 | |
| 2007 | — | 505 | — | — | 505 | |
| 2006 | 16 | 344 | — | — | 360 | |
| 2005 | 16 | 60 | — | — | 76 | |
| 2004 | 250 | 250 | — | 5 | 505 | |
| 2003 | 755 | 250 | — | 5 | 1,010 | |
| 2002 | 755 | 250 | — | 5 | 1,010 | |
| 2001 | 255 | — | — | 255 | 510 | |
| 2000 | 755 | — | — | 250 | 1,005 | |
| 1999 | 755 | — | 750 | — | 1,505 | |
| 1998 | 755 | — | 250 | — | 1,005 | |
| 1997 | 755 | — | 250 | — | 1,005 | |
| 1996 | 755 | — | — | — | 755 | |
| 1995 | 755 | — | — | — | 755 | |
| 1994 | 755 | — | — | — | 755 | |
| 1993 | 755 | — | — | — | 755 | |
| 1992 | 3 | — | — | — | 3 | |
▎ 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.