Silver Bell Mining LLC
Total reported releases 6k lb rose sharply year over year (+40%). Total releases concentrations have fallen 29% since 2010.
25000 W AVRA VALLEY RD, Marana, Arizona · 212230 · Metal Mining · operated by Americas Mining CORP
Notable Signals
No notable signals at this facility for the current reporting year. See chemicals and equity context below for the full picture.
What This Facility Releases
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.
Lead And Lead Compounds
Lead And Lead Compounds concentrations have more than doubled since 2012.
Copper And Copper Compounds
Copper And Copper Compounds concentrations have more than halved since 2010.
Mercury compounds
Mercury compounds volumes here are too small to anchor a multi-year trend; YoY movement is still shown above.
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 →
Low-income
People of color
Under age 5
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.