Washington Mills Hennepin INC
Total reported releases 28k lb held roughly steady year over year (+3%). Total releases concentrations are up 31% since 2010.
13230 PRARIE INDUSTRIAL PKWY, Hennepin, Illinois · 327910 · Nonmetallic Mineral Product · operated by Washington Mills Electro Minerals 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
Carbonyl sulfide
Carbonyl sulfide concentrations are roughly unchanged from 2010.
Hydrogen sulfide
Hydrogen sulfide concentrations are up 13% since 2012.
Carbon disulfide
Carbon disulfide concentrations are roughly unchanged from 2010.
Who Lives Next To This Facility
Within 3 miles of this facility (2 Census block groups, population-weighted demographics): a population of 1,697. 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.