Heidelberg Materials US Cement LLC
Total reported releases 10k lb fell modestly year over year (-7%). Total releases concentrations have fallen 31% since 2012.
675 QUAKER HILL RD, Union Bridge, Maryland · 327310 · Nonmetallic Mineral Product · operated by Heidelberg Materials 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
Hydrogen sulfide
Hydrogen sulfide concentrations have fallen 37% since 2012.
Ammonia
Ammonia concentrations are up 13% since 2012.
Mercury And Mercury Compounds
Mercury And Mercury Compounds concentrations have more than halved since 2010.
Chromium compounds (except for chromite ore mined in the Transvaal Region)
Chromium compounds (except for chromite ore mined in the Transvaal Region) concentrations have fallen 19% since 2010.
Nickel And Nickel Compounds
Nickel And Nickel Compounds volumes here are too small to anchor a multi-year trend; YoY movement is still shown above.
Lead And Lead Compounds
Lead And Lead Compounds concentrations have more than halved since 2010.
Who Lives Next To This Facility
Within 3 miles of this facility (2 Census block groups, population-weighted demographics): a population of 3,081. 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.