Hydrogen fluoride
Hydrogen fluoride releases at Roy S. Nelson Plant rose from 17k lb to 55k lb (3.2×) between 2023 and 2024.
TRI facility · TRI 2024 reporting year
Roy S. Nelson Plant
Total reported releases 426k lb more than doubled year over year (+136%). Total releases concentrations have more than halved since 2010.
3500 HOUSTON RIVER RD, Westlake, Louisiana · 221112 · Electric Utilities · operated by Entergy CORP
Anomaly engine
Notable Signals
Barium And Barium Compounds
Barium And Barium Compounds releases at Roy S. Nelson Plant rose from 134k lb to 296k lb (2.2×) between 2023 and 2024.
0007664939
0007664939 releases at Roy S. Nelson Plant fell from 10k lb to 0 lb (100% lower) between 2023 and 2024.
Total reported releases
Total reported releases at Roy S. Nelson Plant have more than halved since 2010 (through 2024).
Showing the 4 most editorially weighted signals out of 6. Lower-severity signals fold into the chemical breakdown and history charts below.
Chemicals reported · most recent year
What This Facility Releases
Barium And Barium Compounds
Barium And Barium Compounds concentrations have more than halved since 2010.
Hydrogen fluoride
Hydrogen fluoride concentrations have more than halved 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 are up 73% since 2010.
Vanadium compounds
Vanadium compounds concentrations have more than halved since 2010.
Manganese And Manganese Compounds
Manganese And Manganese Compounds concentrations have more than halved since 2010.
Copper And Copper Compounds
Copper And Copper Compounds concentrations have more than halved since 2010.
Zinc compounds
Zinc compounds concentrations have fallen 49% since 2010.
Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)
Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) 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 (7 Census block groups, population-weighted demographics): a population of 9,025. Why we surface this →
33.0%
Low-income
13.9%
People of color
6.7%
Under age 5
18.8%
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.