Total reported releases
Total reported releases at Cholla Power Plant have more than three-quarters since 2010 (through 2024).
TRI facility · TRI 2024 reporting year
Cholla Power Plant
Total reported releases 64k lb fell meaningfully year over year (-32%). Total releases concentrations have more than halved since 2010.
4801 FRONTAGE RD, Joseph City, Arizona · 221112 · Electric Utilities · operated by Pinnacle West Capital CORP
Anomaly engine
Notable Signals
Manganese And Manganese Compounds
Manganese And Manganese Compounds at Cholla Power Plant have more than three-quarters since 2010 (through 2024).
Barium And Barium Compounds
Barium And Barium Compounds at Cholla Power Plant have more than three-quarters since 2010 (through 2024).
Chemicals reported · most recent year
What This Facility Releases
Barium And Barium Compounds
Barium And Barium Compounds concentrations have more than halved since 2010.
Manganese And Manganese Compounds
Manganese And Manganese Compounds concentrations have more than halved since 2010.
Vanadium compounds
Vanadium compounds concentrations have more than halved since 2010.
Hydrogen fluoride
Hydrogen fluoride concentrations have more than halved since 2010.
Lead And Lead Compounds
Lead And Lead Compounds concentrations have more than halved since 2010.
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size)
Sulfuric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) concentrations have more than halved since 2010.
Mercury And Mercury Compounds
Mercury And Mercury Compounds concentrations have more than halved since 2010.
Naphthalene
Naphthalene concentrations have more than halved since 2010.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Navajo County County, AZ (no Census block groups within 3 miles — falling back to containing county): a population of 107,110. Why we surface this →
25.5%
Low-income
58.1%
People of color
7.4%
Under age 5
19.0%
Over age 64
Source: Census ACS 2018-2022 (5-year), county-level fallback. 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.