Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
SHELL CHEMICAL LP - MARTINEZ CATALYST PLANT
10 MOCOCO RD, MARTINEZ, CA, 94553
Parent company: SHELL PETROLEUM INC
Carcinogen
PBT
— 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 | Silver And Silver Compounds | Silver | Toluene | Silver compounds | Ammonia | Total (lbs) |
| 2024 | 6,698 | — | 3,648 | — | 3,248 | 13,594 |
| 2023 | — | — | 6,979 | 9,434 | 4,963 | 21,376 |
| 2022 | 13,717 | — | 3,368 | — | 5,048 | 22,133 |
| 2021 | 13,456 | — | 4,796 | — | 5,988 | 24,240 |
| 2020 | — | — | 3,575 | 9,843 | 995 | 14,413 |
| 2019 | 12,018 | — | 3,483 | — | 1,302 | 16,803 |
| 2002 | — | — | 278 | 5,678 | 3 | 6,024 |
| 2001 | — | 5,159 | 268 | — | — | 5,427 |
| 2000 | — | 7,241 | 310 | — | — | 7,551 |
| 1999 | — | 6,113 | 309 | — | — | 6,422 |
| 1998 | — | 5,547 | 301 | — | — | 5,848 |
| 1997 | — | 3,843 | 225 | — | — | 4,068 |
| 1996 | — | 4,700 | 500 | — | — | 5,200 |
▎ 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.