Zinc compounds
Zinc compounds at Hecla LTD Lucky Friday Mine Unit have risen 67% since 2010 (through 2024).
TRI facility · TRI 2024 reporting year
Hecla LTD Lucky Friday Mine Unit
Total reported releases 19.6M lb rose meaningfully year over year (+29%). Total releases concentrations are roughly unchanged from 2010.
397 FRIDAY AVENUE, Mullan, Idaho · 212230 · Metal Mining · operated by Hecla Mining Co
Anomaly engine
Notable Signals
Lead And Lead Compounds
Lead And Lead Compounds releases at Hecla LTD Lucky Friday Mine Unit rose from 3.1M lb to 4.7M lb between 2023 and 2024.
Chemicals reported · most recent year
What This Facility Releases
Manganese And Manganese Compounds
Manganese And Manganese Compounds concentrations have fallen 23% since 2010.
Lead And Lead Compounds
Lead And Lead Compounds concentrations are up 24% since 2010.
Zinc compounds
Zinc compounds concentrations are up 67% since 2010.
Barium And Barium Compounds
Barium And Barium Compounds concentrations are up 25% since 2010.
Arsenic And Arsenic Compounds
Arsenic And Arsenic Compounds concentrations have fallen 37% since 2010.
Copper And Copper Compounds
Copper And Copper Compounds concentrations have more than doubled since 2010.
Cadmium And Cadmium Compounds
Cadmium And Cadmium Compounds concentrations are up 83% since 2010.
Mercury And Mercury Compounds
Mercury And Mercury Compounds 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 717. Why we surface this →
35.1%
Low-income
9.3%
People of color
8.6%
Under age 5
27.9%
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.