Ethylene
Ethylene at Ineos USA LLC - Chocolate Bayou Plant have more than halved since 2010 (through 2024).
TRI facility · TRI 2024 reporting year
Ineos USA LLC - Chocolate Bayou Plant
Total reported releases 837k lb rose meaningfully year over year (+26%). Total releases concentrations have fallen 40% since 2010.
2 MILES S OF INTERSECTION FM2004 & FM2917, Alvin, Texas · 325199 · Chemicals · operated by Ineos US I INC
Anomaly engine
Notable Signals
Chemicals reported · most recent year
What This Facility Releases
Ethylene
Ethylene concentrations have more than halved since 2010.
Propylene
Propylene concentrations have fallen 47% since 2010.
1,3-Butadiene
1,3-Butadiene concentrations have fallen 30% since 2010.
Ammonia
Ammonia concentrations have more than doubled since 2010.
Nitrate compounds (water dissociable; reportable only when in aqueous solution)
Nitrate compounds (water dissociable; reportable only when in aqueous solution) concentrations are up 58% since 2011.
Benzene
Benzene concentrations have fallen 37% since 2010.
Xylene (mixed isomers)
Xylene (mixed isomers) concentrations have fallen 20% since 2010.
n-Hexane
n-Hexane concentrations have fallen 50% since 2010.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Within 3 miles of this facility (1 Census block groups, population-weighted demographics): a population of 1,661. Why we surface this →
23.8%
Low-income
41.0%
People of color
9.5%
Under age 5
10.2%
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.