Total reported releases 247k lb held roughly steady year over year (+0%). Total releases concentrations have fallen 18% since 2010.
4101 POST RD, Trainer, Pennsylvania · 324110 · Petroleum · operated by Delta Air Lines INC
Nitrate compounds (water dissociable; reportable only when in aqueous solution) at Monroe Energy Llc-Trainer Refinery have more than three-quarters since 2010 (through 2024).
Xylene (mixed isomers) concentrations have more than doubled since 2010.
Nitrate compounds (water dissociable; reportable only when in aqueous solution) concentrations have more than halved since 2010.
n-Hexane concentrations have more than doubled since 2010.
Toluene concentrations have more than doubled since 2010.
Benzene concentrations have more than doubled since 2010.
1,2,4-Trimethylbenzene concentrations have more than doubled since 2010.
Ammonia concentrations have more than halved since 2010.
Ethylbenzene concentrations have more than doubled since 2010.
Within 3 miles of this facility (39 Census block groups, population-weighted demographics): a population of 54,814. 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.