Cyanco CO LLC
Total reported releases 26k lb more than doubled year over year (+126%). Total releases concentrations have more than doubled since 2012.
5505 CYANCO DR., Winnemucca, Nevada · 325180 · Chemicals · operated by Cyanco 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
Cyanide compounds
Cyanide compounds concentrations have more than doubled since 2011.
Ammonia
Ammonia concentrations have more than doubled since 2017.
Hydrogen cyanide
Hydrogen cyanide concentrations have more than halved since 2012.
Who Lives Next To This Facility
Humboldt County County, NV (no Census block groups within 3 miles — falling back to containing county): a population of 17,266. 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.