Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
SHELL OIL CO WESTHOLLOW TECH CENTER
3333 HWY 6 S, HOUSTON, TX, 77082
Parent company: SHELL OIL CO
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 | Cyclohexane | Ethylene | Methyl ethyl ketone | Toluene | 1,3-Butadiene | Total (lbs) |
| 2010 | — | 11,227 | — | — | — | 11,227 |
| 2000 | 2,460 | — | 1,002 | 1,065 | 184 | 4,779 |
| 1999 | 2,031 | — | 471 | 1,102 | 48 | 3,711 |
| 1998 | 8,229 | — | — | 1,034 | 207 | 9,615 |
| 1997 | 8,279 | — | 1,694 | 1,280 | 67 | 11,404 |
| 1996 | 4,087 | — | 1,426 | — | 56 | 5,635 |
| 1995 | 3,241 | — | 2,191 | — | 51 | 5,506 |
| 1994 | 4,723 | — | 1,176 | 2,537 | 157 | 8,683 |
| 1993 | 4,964 | — | 1,011 | — | 173 | 6,353 |
▎ 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.