Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
COMMONWEALTH UTILITIES CORP (CUC)
CHALAN PALE ARNOLD ROAD, PUERTO RICO, SAIPAN, MP, 96950
Parent company: COMMONWEALTH UTILITIES CORP (CUC)
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 | Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) | Polycyclic aromatic compounds | Naphthalene | Ethylbenzene | Mercury | Total (lbs) |
| 2019 | — | — | 13 | — | — | 13 |
| 2018 | — | — | 4 | — | — | 4 |
| 2017 | — | — | 9 | — | — | 9 |
| 2016 | — | — | 3 | — | — | 4 |
| 2015 | — | — | — | — | — | 1 |
| 2014 | — | — | 2 | — | — | 4 |
| 2013 | — | — | 8 | — | — | 19 |
| 2012 | 8,355 | 55 | 317 | 181 | 43 | 8,964 |
| 2011 | — | 387 | 65 | — | 18 | 470 |
| 2010 | — | 408 | 68 | — | 19 | 495 |
▎ 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.