Total reported releases
Total reported releases at Graymont (Wi) INC. have risen 93% since 2010 (through 2024).
TRI facility · TRI 2024 reporting year
Graymont (Wi) INC.
Total reported releases 250k lb rose meaningfully year over year (+19%). Total releases concentrations are up 93% since 2010.
HILL AVE AT WINTER ST, Superior, Wisconsin · 327410 · Nonmetallic Mineral Product · operated by Graymont LTD
Anomaly engine
Notable Signals
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) at Graymont (Wi) INC. have risen 93% since 2010 (through 2024).
Chemicals reported · most recent year
What This Facility Releases
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) concentrations are up 93% since 2010.
Lead And Lead Compounds
Lead And Lead Compounds volumes here are too small to anchor a multi-year trend; YoY movement is still shown above.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Within 3 miles of this facility (20 Census block groups, population-weighted demographics): a population of 20,186. Why we surface this →
32.5%
Low-income
13.1%
People of color
4.7%
Under age 5
15.2%
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.