Total reported releases
Total reported releases at Holcim (Us) INC Portland Plant have risen 65% since 2010 (through 2024).
TRI facility · TRI 2024 reporting year
Holcim (Us) INC Portland Plant
Total reported releases 177k lb fell modestly year over year (-8%). Total releases concentrations are up 65% since 2010.
3500 STATE HWY 120, Florence, Colorado · 327310 · Nonmetallic Mineral Product · operated by Holcim Participations (Us) INC
Anomaly engine
Notable Signals
Chemicals reported · most recent year
What This Facility Releases
Ammonia
Ammonia concentrations are up 46% since 2010.
Hydrogen cyanide
Hydrogen cyanide concentrations are roughly unchanged from 2023.
Benzene
Benzene concentrations are roughly unchanged from 2023.
Mercury
Mercury concentrations have more than halved since 2018.
Lead And Lead Compounds
Lead And Lead Compounds concentrations have more than halved since 2010.
Chromium
Chromium concentrations have more than halved since 2020.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Within 3 miles of this facility (4 Census block groups, population-weighted demographics): a population of 6,108. Why we surface this →
26.1%
Low-income
35.6%
People of color
2.1%
Under age 5
12.7%
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.