Marathon Petroleum CO - Wellsville Oh Asp Terminal
Total reported releases 41 lb more than halved year over year (-95%). Total releases concentrations have more than halved since 2012.
102 21ST ST, Wellsville, Ohio · 424710 · Petroleum Bulk Terminals · operated by Marathon Petroleum 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
Xylene (mixed isomers)
Xylene (mixed isomers) concentrations have more than halved since 2013.
Ethylbenzene
Ethylbenzene concentrations have fallen 25% since 2013.
Toluene
Toluene concentrations have more than halved since 2013.
Naphthalene
Naphthalene concentrations have more than halved since 2012.
n-Hexane
n-Hexane concentrations have more than halved since 2013.
Who Lives Next To This Facility
Within 3 miles of this facility (5 Census block groups, population-weighted demographics): a population of 3,626. 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.