Xylene (mixed isomers)
Xylene (mixed isomers) releases at Hf Siinclair Tulsa Refining LLC East Facility rose from 4k lb to 19k lb (4.3×) between 2023 and 2024.
TRI facility · TRI 2024 reporting year
Hf Siinclair Tulsa Refining LLC East Facility
Total reported releases 213k lb rose meaningfully year over year (+30%). Total releases concentrations have fallen 27% since 2010.
902 W 25TH ST, Tulsa, Oklahoma · 324110 · Petroleum · operated by Hf Sinclair CORP
Anomaly engine
Notable Signals
Toluene
Toluene releases at Hf Siinclair Tulsa Refining LLC East Facility rose from 5k lb to 22k lb (4.2×) between 2023 and 2024.
Chemicals reported · most recent year
What This Facility Releases
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 more than doubled since 2010.
Toluene
Toluene concentrations are roughly unchanged from 2010.
Xylene (mixed isomers)
Xylene (mixed isomers) concentrations are roughly unchanged from 2010.
n-Hexane
n-Hexane concentrations have more than halved since 2010.
Benzene
Benzene concentrations have more than halved since 2010.
Formaldehyde
Formaldehyde concentrations have more than halved since 2015.
Ethylbenzene
Ethylbenzene concentrations are up 47% since 2010.
Naphthalene
Naphthalene 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 (58 Census block groups, population-weighted demographics): a population of 56,471. Why we surface this →
34.5%
Low-income
31.1%
People of color
4.9%
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.