Total reported releases 181k lb fell sharply year over year (-48%). Total releases concentrations are up 18% since 2010.
135TH ST & NEW AVE, Lemont, Illinois · 324110 · Petroleum · operated by Pdv Holding INC
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) releases at Citgo Petroleum Corp Lemont Refinery rose from 15k lb to 26k lb between 2023 and 2024.
Nitrate compounds (water dissociable; reportable only when in aqueous solution) releases at Citgo Petroleum Corp Lemont Refinery fell from 161k lb to 5 lb (100% lower) between 2023 and 2024.
Hydrogen sulfide concentrations have fallen 11% since 2012.
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) concentrations have fallen 43% since 2010.
Ammonia concentrations have more than doubled since 2010.
n-Hexane concentrations are up 51% since 2010.
Toluene concentrations are up 51% since 2010.
Benzene concentrations have more than doubled since 2010.
Ethylbenzene concentrations have more than doubled since 2010.
Xylene (mixed isomers) concentrations have fallen 19% since 2010.
Within 3 miles of this facility (21 Census block groups, population-weighted demographics): a population of 31,388. 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.