Year-over-year total releases
Reported on-site TRI releases in pounds (lbs), grouped by reporting year.
Facility detail
ISABELLA PEARL MINE (006-240-02)
5000 HWY 361, LUNING, NV, 89420
Parent company: FORTITUDE GOLD CORP
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 | Nitrate compounds (water dissociable; reportable only when in aqueous solution) | Mercury And Mercury Compounds | Mercury compounds | Cyanide compounds | Total (lbs) | |
| 2024 | 4,246 | — | 3,652 | — | 7,898 | |
| 2023 | 3,212 | — | 3,383 | — | 6,595 | |
| 2022 | 6,742 | — | 4,151 | 1,874 | 12,767 | |
| 2021 | 19,323 | 17,297 | — | — | 36,620 | |
| 2019 | 18,807 | — | — | — | 18,807 | |
▎ 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.