Ethylene
Ethylene at Exxonmobil Baytown Chemical Plant (Part) have more than doubled since 2010 (through 2024).
TRI facility · TRI 2024 reporting year
Exxonmobil Baytown Chemical Plant (Part)
Total reported releases 1.5M lb fell meaningfully year over year (-20%). Total releases concentrations are up 17% since 2010.
5000 BAYWAY DR, Baytown, Texas · 325110 · Chemicals · operated by Exxon Mobil CORP
Anomaly engine
Notable Signals
N090
N090 releases at Exxonmobil Baytown Chemical Plant (Part) fell from 49k lb to 0 lb (100% lower) between 2023 and 2024.
Chemicals reported · most recent year
What This Facility Releases
Propylene
Propylene concentrations are up 13% since 2010.
Ethylene
Ethylene concentrations have more than doubled since 2010.
Ammonia
Ammonia concentrations are roughly unchanged from 2010.
Nitrate compounds (water dissociable; reportable only when in aqueous solution)
Nitrate compounds (water dissociable; reportable only when in aqueous solution) concentrations have more than doubled since 2010.
Chloromethane
Chloromethane concentrations are up 37% since 2010.
n-Hexane
n-Hexane concentrations have fallen 34% since 2010.
Xylene (mixed isomers)
Xylene (mixed isomers) concentrations have fallen 46% since 2010.
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 fallen 34% since 2010.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Within 3 miles of this facility (16 Census block groups, population-weighted demographics): a population of 24,254. Why we surface this →
41.3%
Low-income
71.6%
People of color
6.2%
Under age 5
11.9%
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.