Uss Mon Valley Works - Irvin Plant
Total reported releases 79k lb held roughly steady year over year (-0%). Total releases concentrations have fallen 49% since 2010.
CAMP HOLLOW RD, West Mifflin, Pennsylvania · 331221 · Primary Metals · operated by US Steel 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
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) concentrations are roughly unchanged from 2010.
Ethylene
Ethylene concentrations are up 56% since 2010.
Manganese And Manganese Compounds
Manganese And Manganese Compounds concentrations have more than halved since 2010.
Zinc compounds
Zinc compounds concentrations have more than halved since 2010.
Nickel compounds
Nickel compounds concentrations have more than halved since 2018.
Lead compounds
Lead compounds concentrations have more than halved since 2010.
Benzene
Benzene concentrations have fallen 18% since 2018.
Who Lives Next To This Facility
Within 3 miles of this facility (40 Census block groups, population-weighted demographics): a population of 44,398. Why we surface this →
Low-income
People of color
Under age 5
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.