Holcim Wcr INC Firestone Ready Mix Plant
Total reported releases 487 lb rose sharply year over year (+66%). Total releases concentrations are up 66% since 2023.
12248 COUNTY ROAD 15, Longmont, Colorado · 327320 · Nonmetallic Mineral Product · operated by Holcim Participations (Us) INC
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
Nitrate compounds (water dissociable; reportable only when in aqueous solution)
Nitrate compounds (water dissociable; reportable only when in aqueous solution) concentrations are up 66% since 2023.
Lead And Lead Compounds
Lead And Lead Compounds concentrations are up 89% since 2023.
Who Lives Next To This Facility
Within 3 miles of this facility (6 Census block groups, population-weighted demographics): a population of 12,513. 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.