n-Butyl alcohol
n-Butyl alcohol releases at Freeport-Mcmoran Sierrita INC fell from 22k lb to 8k lb (64% lower) between 2023 and 2024.
TRI facility · TRI 2024 reporting year
Freeport-Mcmoran Sierrita INC
Total reported releases 1.7M lb fell meaningfully year over year (-32%). Total releases concentrations have fallen 33% since 2010.
6200 W DUVAL MINE RD, Green Valley, Arizona · 212230 · Metal Mining · operated by Freeport-Mcmoran INC
Anomaly engine
Notable Signals
Manganese
Manganese releases at Freeport-Mcmoran Sierrita INC fell from 340k lb to 130k lb (62% lower) between 2023 and 2024.
Nickel
Nickel releases at Freeport-Mcmoran Sierrita INC fell from 140k lb to 60k lb (57% lower) between 2023 and 2024.
Chromium
Chromium at Freeport-Mcmoran Sierrita INC have more than three-quarters since 2011 (through 2024).
Showing the 4 most editorially weighted signals out of 5. Lower-severity signals fold into the chemical breakdown and history charts below.
Chemicals reported · most recent year
What This Facility Releases
Lead And Lead Compounds
Lead And Lead Compounds concentrations have fallen 28% since 2010.
Manganese
Manganese concentrations have more than halved since 2010.
Cobalt
Cobalt concentrations are up 10% since 2019.
Arsenic
Arsenic concentrations are up 12% since 2019.
Nickel
Nickel concentrations have more than halved since 2011.
Chromium
Chromium concentrations have more than halved since 2011.
Molybdenum trioxide
Molybdenum trioxide concentrations are up 43% since 2010.
Copper And Copper Compounds
Copper And Copper Compounds concentrations are up 18% since 2010.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Pima County County, AZ (no Census block groups within 3 miles — falling back to containing county): a population of 1,042,393. Why we surface this →
14.9%
Low-income
49.9%
People of color
5.6%
Under age 5
20.4%
Over age 64
Source: Census ACS 2018-2022 (5-year), county-level fallback. 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.