Nickel compounds
Nickel compounds at Stillwater Mining CO East Boulder Mine have more than doubled since 2010 (through 2024).
TRI facility · TRI 2024 reporting year
Stillwater Mining CO East Boulder Mine
Total reported releases 374k lb fell modestly year over year (-9%). Total releases concentrations have more than doubled since 2010.
517 W 1ST AVE, Big Timber, Montana · 212290 · Metal Mining · operated by Stillwater Mining Co
Anomaly engine
Notable Signals
Total reported releases
Total reported releases at Stillwater Mining CO East Boulder Mine have more than doubled since 2010 (through 2024).
Methanol
Methanol releases at Stillwater Mining CO East Boulder Mine rose from 35k lb to 55k lb between 2023 and 2024.
Chemicals reported · most recent year
What This Facility Releases
Nickel compounds
Nickel compounds concentrations have more than doubled since 2010.
Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)
Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) concentrations have more than doubled since 2010.
Methanol
Methanol concentrations are up 28% since 2010.
Copper compounds
Copper compounds concentrations are up 59% since 2010.
Propylene
Propylene concentrations are roughly unchanged from 2022.
Nitrate compounds (water dissociable; reportable only when in aqueous solution)
Nitrate compounds (water dissociable; reportable only when in aqueous solution) concentrations are roughly unchanged from 2015.
Lead compounds
Lead compounds concentrations have more than halved since 2010.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Within 3 miles of this facility (3 Census block groups, population-weighted demographics): a population of 2,072. Why we surface this →
27.4%
Low-income
11.0%
People of color
7.3%
Under age 5
22.3%
Over age 64
Source: Census ACS 2018-2022 block-group demographics, population-weighted across the 3-mile buffer around this facility (from USEPA-clone/EJAM-open blockgroupstats). Indicator-level percentile and EJ-disparity scores are surfaced on the county page and the state page — they describe wider regional exposure burdens, not effects attributable to a single facility.
Source. EPA Toxics Release Inventory · retrieved 2026-05-07. Reporting year 2024. TRI is a federal public-domain dataset under 17 USC §105.
What this is not. TRI quantifies releases reported by the facility under EPCRA §313 — not ambient air or water concentrations measured at receptors. We do not attribute individual health outcomes to specific facilities; that exceeds what the data can support.