Andeavor Field Services Llc-Belfield Gas Plant
Total reported releases 31k lb fell meaningfully year over year (-18%). Total releases concentrations have more than halved since 2022.
13072 38TH ST SW, Belfield, North Dakota · 211130 · Natural Gas Processing · operated by Marathon Petroleum CORP
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
Toluene
Toluene concentrations have fallen 29% since 2022.
n-Hexane
n-Hexane concentrations are roughly unchanged from 2022.
Xylene (mixed isomers)
Xylene (mixed isomers) concentrations have more than halved since 2022.
Benzene
Benzene concentrations have more than halved since 2022.
Methanol
Methanol concentrations are roughly unchanged from 2022.
Who Lives Next To This Facility
Stark County County, ND (no Census block groups within 3 miles — falling back to containing county): a population of 32,989. Why we surface this →
Low-income
People of color
Under age 5
Over age 64
Source: Census ACS 2018-2022 (5-year), county-level fallback. 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.