Nickel
Nickel at Freeport-Mcmoran Morenci INC have more than doubled since 2010 (through 2024).
TRI facility · TRI 2024 reporting year
Freeport-Mcmoran Morenci INC
Total reported releases 6.3M lb rose sharply year over year (+54%). Total releases concentrations have more than doubled since 2010.
4521 N US HWY 191, Morenci, Arizona · 212230 · Metal Mining · operated by Freeport-Mcmoran INC
Anomaly engine
Notable Signals
Total reported releases
Total reported releases at Freeport-Mcmoran Morenci INC have more than doubled since 2010 (through 2024).
Zinc compounds
Zinc compounds releases at Freeport-Mcmoran Morenci INC rose from 1.3M lb to 2.9M lb (2.2×) between 2023 and 2024.
N078
N078 releases at Freeport-Mcmoran Morenci INC fell from 26k lb to 0 lb (100% lower) between 2023 and 2024.
Showing the 4 most editorially weighted signals out of 6. Lower-severity signals fold into the chemical breakdown and history charts below.
Chemicals reported · most recent year
What This Facility Releases
Zinc compounds
Zinc compounds concentrations have more than doubled since 2015.
Lead And Lead Compounds
Lead And Lead Compounds concentrations are roughly unchanged from 2010.
Chromium
Chromium concentrations are roughly unchanged from 2010.
Manganese And Manganese Compounds
Manganese And Manganese Compounds concentrations have fallen 35% since 2010.
Nickel
Nickel concentrations have more than doubled since 2010.
Arsenic And Arsenic Compounds
Arsenic And Arsenic Compounds concentrations are up 50% since 2020.
Cobalt And Cobalt Compounds
Cobalt And Cobalt Compounds concentrations have more than doubled since 2015.
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) concentrations are roughly unchanged from 2010.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Within 3 miles of this facility (1 Census block groups, population-weighted demographics): a population of 1,115. Why we surface this →
5.9%
Low-income
46.1%
People of color
11.0%
Under age 5
0.4%
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.