Manganese
Manganese at Asarco LLC Mission Complex have more than doubled since 2010 (through 2024).
TRI facility · TRI 2024 reporting year
Asarco LLC Mission Complex
Total reported releases 2.1M lb fell modestly year over year (-6%). Total releases concentrations are up 32% since 2010.
4201 W PIMA MINE RD, Sahuarita, Arizona · 212230 · Metal Mining · operated by Americas Mining CORP
Anomaly engine
Notable Signals
Chromium
Chromium releases at Asarco LLC Mission Complex fell from 188k lb to 64k lb (66% lower) between 2023 and 2024.
Chemicals reported · most recent year
What This Facility Releases
Lead And Lead Compounds
Lead And Lead Compounds concentrations are up 17% since 2010.
Manganese
Manganese concentrations have more than doubled since 2010.
Nickel
Nickel concentrations have more than doubled since 2010.
Chromium
Chromium concentrations are roughly unchanged from 2010.
Copper And Copper Compounds
Copper And Copper Compounds concentrations have fallen 28% since 2010.
Mercury And Mercury Compounds
Mercury And Mercury Compounds concentrations are up 12% since 2013.
Ammonia
Ammonia concentrations have fallen 33% 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.