Acetaldehyde
Acetaldehyde releases at Aztalan Bio rose from 3k lb to 13k lb (5.0×) between 2023 and 2024.
TRI facility · TRI 2024 reporting year
Aztalan Bio
Total reported releases 29k lb rose by an order of magnitude year over year (+843%). Total releases concentrations have more than doubled since 2023.
W5289 VALERO WAY, Johnson Creek, Wisconsin · 325193 · Chemicals
Anomaly engine
Notable Signals
Chemicals reported · most recent year
What This Facility Releases
Acetaldehyde
Acetaldehyde concentrations have more than doubled since 2023.
Formic acid
Formic acid volumes here are too small to anchor a multi-year trend; YoY movement is still shown above.
n-Hexane
n-Hexane concentrations have more than doubled since 2023.
Acrolein
Acrolein volumes here are too small to anchor a multi-year trend; YoY movement is still shown above.
Methanol
Methanol volumes here are too small to anchor a multi-year trend; YoY movement is still shown above.
Formaldehyde
Formaldehyde volumes here are too small to anchor a multi-year trend; YoY movement is still shown above.
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 2,858. Why we surface this →
15.9%
Low-income
15.0%
People of color
9.0%
Under age 5
9.9%
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.