N020
N020 releases at Springerville Generating Station fell from 26k lb to 0 lb (100% lower) between 2023 and 2024.
TRI facility · TRI 2024 reporting year
Springerville Generating Station
Total reported releases 2.2M lb fell modestly year over year (-9%). Total releases concentrations have fallen 47% since 2010.
12 MILES N 12 MILES E, Springerville, Arizona · 221112 · Electric Utilities · operated by Uns Energy CORP
Anomaly engine
Notable Signals
Ammonia
Ammonia releases at Springerville Generating Station fell from 115k lb to 9k lb (92% lower) between 2023 and 2024.
Ammonia
Ammonia at Springerville Generating Station have more than three-quarters since 2010 (through 2024).
Hydrogen fluoride
Hydrogen fluoride at Springerville Generating Station have more than halved since 2010 (through 2024).
Chemicals reported · most recent year
What This Facility Releases
Barium compounds (except for barium sulfate (CAS No. 7727-43-7))
Barium compounds (except for barium sulfate (CAS No. 7727-43-7)) concentrations have fallen 30% since 2018.
Manganese compounds
Manganese compounds concentrations have more than halved since 2018.
Vanadium compounds
Vanadium compounds concentrations have fallen 42% since 2018.
Copper compounds
Copper compounds concentrations have fallen 33% since 2018.
Zinc compounds
Zinc compounds concentrations have fallen 45% since 2010.
Chromium compounds (except for chromite ore mined in the Transvaal Region)
Chromium compounds (except for chromite ore mined in the Transvaal Region) concentrations have fallen 50% since 2018.
Lead compounds
Lead compounds concentrations have fallen 44% since 2018.
Nickel compounds
Nickel compounds concentrations have fallen 49% since 2018.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Within 3 miles of this facility (4 Census block groups, population-weighted demographics): a population of 4,475. Why we surface this →
35.2%
Low-income
25.0%
People of color
8.8%
Under age 5
25.0%
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.