Lone Star Ind. INC. Dba Buzzi Unicem USA Pryor Cement Plant
Total reported releases 109 lb fell modestly year over year (-5%). Total releases concentrations have more than halved since 2010.
2430 S COUNTY RD 437, Pryor, Oklahoma · 327310 · Nonmetallic Mineral Product · operated by Rc Lonestar 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 Toxic Chemicals Lone Star Ind. INC. Dba Buzzi Unicem USA Pryor Cement Plant Releases
Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)
Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) concentrations have more than halved since 2018.
Lead And Lead Compounds
Lead And Lead Compounds concentrations have fallen 35% since 2010.
Lithium carbonate
Lithium carbonate concentrations are up 63% since 2014.
Mercury And Mercury Compounds
Mercury And Mercury Compounds concentrations have more than halved since 2010.
Dioxin and dioxin-like compounds
Dioxin and dioxin-like compounds volumes here are too small to anchor a multi-year trend; YoY movement is still shown above.
Who Lives Near Lone Star Ind. INC. Dba Buzzi Unicem USA Pryor Cement Plant
Within 3 miles of this facility (1 Census block groups, population-weighted demographics): a population of 2,210. 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.