Ethylene
Ethylene releases at Cleveland-Cliffs Monessen Coke LLC rose from 15k lb to 26k lb between 2023 and 2024.
TRI facility · TRI 2024 reporting year
Cleveland-Cliffs Monessen Coke LLC
Total reported releases 88k lb rose meaningfully year over year (+20%). Total releases concentrations are up 94% since 2014.
345 DONNER AVE, Monessen, Pennsylvania · 324199 · Petroleum · operated by Cleveland-Cliffs INC
Anomaly engine
Notable Signals
Chemicals reported · most recent year
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 have fallen 19% since 2016.
Ethylene
Ethylene concentrations have more than doubled since 2014.
Benzene
Benzene concentrations have fallen 40% since 2014.
Ammonia
Ammonia concentrations are roughly unchanged from 2015.
Propylene
Propylene concentrations have fallen 16% since 2014.
Cyanide compounds
Cyanide compounds concentrations are up 17% since 2014.
Toluene
Toluene concentrations have fallen 17% since 2014.
Xylene (mixed isomers)
Xylene (mixed isomers) concentrations have more than doubled since 2014.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Within 3 miles of this facility (26 Census block groups, population-weighted demographics): a population of 27,159. Why we surface this →
39.2%
Low-income
19.5%
People of color
4.7%
Under age 5
22.8%
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.