Marquis Energy LLC
Total reported releases 53k lb held roughly steady year over year (+2%). Total releases concentrations have more than doubled since 2010.
11953 PRAIRIE INDUSTRIAL PKWY, Hennepin, Illinois · 325193 · Chemicals
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
n-Hexane
n-Hexane concentrations have fallen 17% since 2017.
Acetaldehyde
Acetaldehyde concentrations are up 33% since 2010.
Formaldehyde
Formaldehyde concentrations have more than doubled since 2017.
Methanol
Methanol concentrations have more than doubled since 2014.
Acrolein
Acrolein concentrations are up 69% since 2010.
Formic acid
Formic acid concentrations have more than doubled since 2019.
Ammonia
Ammonia concentrations have more than halved since 2010.
Xylene (mixed isomers)
Xylene (mixed isomers) concentrations are up 14% since 2013.
Who Lives Next To This Facility
Within 3 miles of this facility (3 Census block groups, population-weighted demographics): a population of 2,378. 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.