Sumco LLC
Total reported releases 353 lb fell sharply year over year (-41%). Total releases concentrations have more than doubled since 2010.
1351 S GIRLS SCHOOL RD, Indianapolis, Indiana · 332813 · Fabricated Metals
Notable Signals
No notable signals at this facility for the current reporting year. See chemicals and equity context below for the full picture.
What This Facility Releases
Copper compounds
Copper compounds concentrations are up 97% since 2010.
Nickel compounds
Nickel compounds concentrations are up 32% since 2011.
Cyanide compounds
Cyanide compounds concentrations have more than halved since 2014.
Lead compounds
Lead compounds concentrations are roughly unchanged from 2010.
Who Lives Next To This Facility
Within 3 miles of this facility (41 Census block groups, population-weighted demographics): a population of 58,504. Why we surface this →
Low-income
People of color
Under age 5
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.