Propylene
Propylene releases at Motiva - Port Arthur Chemicals fell from 57k lb to 28k lb (52% lower) between 2023 and 2024.
TRI facility · TRI 2024 reporting year
Motiva - Port Arthur Chemicals
Total reported releases 158k lb fell modestly year over year (-10%). Total releases concentrations have more than halved since 2010.
4241 SAVANNAH AVE, Port Arthur, Texas · 325110 · Chemicals · operated by Aramco Services Co
Anomaly engine
Notable Signals
Ethylene
Ethylene at Motiva - Port Arthur Chemicals have more than three-quarters since 2010 (through 2024).
Total reported releases
Total reported releases at Motiva - Port Arthur Chemicals have more than three-quarters since 2010 (through 2024).
Propylene
Propylene at Motiva - Port Arthur Chemicals have more than three-quarters since 2010 (through 2024).
Chemicals reported · most recent year
What This Facility Releases
Ethylene
Ethylene concentrations have more than halved since 2010.
Propylene
Propylene concentrations have more than halved since 2010.
Benzene
Benzene concentrations have more than halved since 2010.
Cyclohexane
Cyclohexane concentrations have more than halved since 2010.
Toluene
Toluene concentrations have fallen 30% since 2010.
n-Hexane
n-Hexane concentrations have more than halved since 2010.
Ammonia
Ammonia concentrations have more than doubled since 2017.
1,3-Butadiene
1,3-Butadiene concentrations have more than halved since 2010.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Within 3 miles of this facility (26 Census block groups, population-weighted demographics): a population of 25,040. Why we surface this →
48.6%
Low-income
87.2%
People of color
6.9%
Under age 5
14.0%
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.