Zinc compounds
Zinc compounds releases at Hf Sinclair Parco Refining LLC rose from 2k lb to 24k lb (16.3×) between 2023 and 2024.
TRI facility · TRI 2024 reporting year
Hf Sinclair Parco Refining LLC
Total reported releases 340k lb fell modestly year over year (-12%). Total releases concentrations are up 19% since 2010.
100 E LINCOLN AVE, Sinclair, Wyoming · 324110 · Petroleum · operated by Hf Sinclair CORP
Anomaly engine
Notable Signals
Chemicals reported · most recent year
What This Facility Releases
Toluene
Toluene concentrations are up 83% since 2010.
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.
Xylene (mixed isomers)
Xylene (mixed isomers) concentrations have more than doubled since 2010.
Zinc compounds
Zinc compounds concentrations have more than doubled since 2014.
Ammonia
Ammonia concentrations have fallen 30% since 2010.
Hydrogen sulfide
Hydrogen sulfide concentrations are up 13% since 2012.
Molybdenum trioxide
Molybdenum trioxide concentrations have more than doubled since 2022.
n-Hexane
n-Hexane concentrations have more than halved since 2010.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Carbon County County, WY (no Census block groups within 3 miles — falling back to containing county): a population of 14,609. Why we surface this →
13.9%
Low-income
23.8%
People of color
7.9%
Under age 5
18.3%
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.