Zinc compounds
Zinc compounds releases at Chs INC. Laurel Refinery rose from 9k lb to 25k lb (2.6×) between 2023 and 2024.
TRI facility · TRI 2024 reporting year
Chs INC. Laurel Refinery
Total reported releases 298k lb rose sharply year over year (+63%). Total releases concentrations are up 17% since 2010.
803 HWY 212 S, Laurel, Montana · 324110 · Petroleum · operated by Chs INC
Anomaly engine
Notable Signals
Nitrate compounds (water dissociable; reportable only when in aqueous solution)
Nitrate compounds (water dissociable; reportable only when in aqueous solution) releases at Chs INC. Laurel Refinery rose from 46k lb to 113k lb (2.5×) between 2023 and 2024.
Ammonia
Ammonia releases at Chs INC. Laurel Refinery rose from 30k lb to 62k lb (2.1×) between 2023 and 2024.
Chemicals reported · most recent year
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 roughly unchanged from 2010.
Ammonia
Ammonia concentrations have more than doubled since 2010.
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 have fallen 15% since 2010.
Zinc compounds
Zinc compounds concentrations have more than doubled since 2023.
Xylene (mixed isomers)
Xylene (mixed isomers) concentrations are up 74% since 2010.
Propylene
Propylene concentrations have fallen 38% since 2010.
n-Hexane
n-Hexane concentrations have more than halved since 2010.
Methanol
Methanol concentrations have more than doubled since 2010.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Within 3 miles of this facility (7 Census block groups, population-weighted demographics): a population of 9,732. Why we surface this →
25.0%
Low-income
13.6%
People of color
5.9%
Under age 5
17.0%
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.