Polycyclic aromatic compounds
Polycyclic aromatic compounds at Koppers INC have more than three-quarters since 2010 (through 2024).
TRI facility · TRI 2024 reporting year
Koppers INC
Total reported releases 163k lb held roughly steady year over year (+3%). Total releases concentrations have fallen 45% since 2010.
3900 S LARAMIE AVE, Cicero, Illinois · 325194 · Chemicals · operated by Koppers INC
Anomaly engine
Notable Signals
Chemicals reported · most recent year
What This Facility Releases
Maleic anhydride
Maleic anhydride concentrations are roughly unchanged from 2010.
Phthalic anhydride
Phthalic anhydride concentrations have fallen 24% since 2010.
Naphthalene
Naphthalene concentrations have fallen 49% since 2010.
Benzene
Benzene concentrations are up 78% since 2010.
Xylene (mixed isomers)
Xylene (mixed isomers) concentrations are roughly unchanged from 2019.
Toluene
Toluene concentrations have fallen 34% since 2019.
Phenol
Phenol concentrations have more than doubled since 2012.
Polycyclic aromatic compounds
Polycyclic aromatic compounds concentrations have more than halved since 2010.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Within 3 miles of this facility (216 Census block groups, population-weighted demographics): a population of 283,140. Why we surface this →
38.7%
Low-income
84.8%
People of color
6.0%
Under age 5
12.8%
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.