Total reported releases 86k lb held roughly steady year over year (+4%). Total releases concentrations have more than halved since 2010.
401 S 23RD ST, Billings, Montana · 324110 · Petroleum · operated by Phillips 66 Co
Nitrate compounds (water dissociable; reportable only when in aqueous solution) at Phillips 66 CO Billings Refinery have more than three-quarters since 2010 (through 2024).
Total reported releases at Phillips 66 CO Billings Refinery have more than halved since 2010 (through 2024).
Xylene (mixed isomers) concentrations are up 29% since 2010.
Toluene concentrations have fallen 14% since 2010.
Propylene concentrations are up 21% since 2010.
Nitrate compounds (water dissociable; reportable only when in aqueous solution) concentrations have more than halved since 2010.
n-Hexane concentrations have fallen 13% since 2010.
Ammonia concentrations are up 58% since 2010.
Benzene concentrations have fallen 42% since 2010.
Ethylene concentrations have more than doubled since 2010.
Within 3 miles of this facility (40 Census block groups, population-weighted demographics): a population of 46,182. 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.