Total reported releases 35k lb fell sharply year over year (-52%). Total releases concentrations have more than halved since 2010.
3525 N HWY 191 S, Cochise, Arizona · 221112 · Electric Utilities
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) at Arizona Electric Power Cooperative INC have more than three-quarters since 2010 (through 2024).
Total reported releases at Arizona Electric Power Cooperative INC have more than three-quarters since 2010 (through 2024).
Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) at Arizona Electric Power Cooperative INC have more than halved since 2010 (through 2024).
Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) concentrations have more than halved since 2010.
Manganese 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) concentrations have more than halved since 2010.
Copper compounds concentrations have more than halved since 2010.
Hydrochloric acid (acid aerosols including mists, vapors, gas, fog, and other airborne forms of any particle size) concentrations have more than halved since 2010.
Lead compounds concentrations have more than halved since 2010.
Cobalt compounds concentrations have more than halved since 2010.
Hydrogen fluoride concentrations have more than halved since 2010.
Cochise County County, AZ (no Census block groups within 3 miles — falling back to containing county): a population of 125,504. Why we surface this →
Low-income
People of color
Under age 5
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.