Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
HAWAIIAN ELECTRIC CO INC SCHOFIELD GENERATING STATION
FOOTE AVE, WAHIAWA, HI, 96786
Parent company: HAWAIIAN ELECTRIC INDUSTRIES 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 | Ammonia | Naphthalene | Polycyclic aromatic compounds | Total (lbs) | ||
| 2024 | 214 | 28 | 1 | 243 | ||
| 2023 | 58 | 26 | 1 | 85 | ||
| 2022 | 42 | 18 | 1 | 61 | ||
| 2021 | 61 | 26 | 1 | 88 | ||
| 2020 | 71 | 31 | 1 | 103 | ||
| 2019 | 127 | 56 | 2 | 185 | ||
| 2018 | 111 | 49 | 2 | 162 | ||
▎ 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.