Capitol Aggregates INC.
Total reported releases 29k lb rose by an order of magnitude year over year (+1222%). Total releases concentrations have more than doubled since 2010.
11551 NACOGDOCHES RD, San Antonio, Texas · 327310 · Nonmetallic Mineral Product · operated by Zachry Construction & Materials INC
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
Formaldehyde
Formaldehyde concentrations have fallen 23% since 2014.
Ammonia
Ammonia concentrations have fallen 21% since 2010.
Mercury And Mercury Compounds
Mercury And Mercury Compounds concentrations have more than doubled since 2010.
Lead And Lead Compounds
Lead And Lead Compounds concentrations are up 76% since 2010.
Who Lives Next To This Facility
Within 3 miles of this facility (64 Census block groups, population-weighted demographics): a population of 91,742. 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.