Selenium And Selenium Compounds
Selenium And Selenium Compounds releases at Kennecott Utah Copper Smelter & Refinery rose from 40k lb to 72k lb between 2023 and 2024.
TRI facility · TRI 2024 reporting year
Kennecott Utah Copper Smelter & Refinery
Total reported releases 21.2M lb rose meaningfully year over year (+17%). Total releases concentrations have fallen 12% since 2010.
12000 WEST 2100 SOUTH & 11500 W 2100 S, Magna, Utah · 331410 · Primary Metals · operated by Rio Tinto America INC
Anomaly engine
Notable Signals
0000107211
0000107211 releases at Kennecott Utah Copper Smelter & Refinery fell from 14k lb to 0 lb (100% lower) between 2023 and 2024.
Nickel And Nickel Compounds
Nickel And Nickel Compounds releases at Kennecott Utah Copper Smelter & Refinery fell from 223k lb to 103k lb (54% lower) between 2023 and 2024.
Nickel And Nickel Compounds
Nickel And Nickel Compounds at Kennecott Utah Copper Smelter & Refinery have more than halved since 2010 (through 2024).
Showing the 4 most editorially weighted signals out of 5. Lower-severity signals fold into the chemical breakdown and history charts below.
Chemicals reported · most recent year
What This Facility Releases
Copper And Copper Compounds
Copper And Copper Compounds concentrations are roughly unchanged from 2010.
Zinc compounds
Zinc compounds concentrations have fallen 15% since 2010.
Lead And Lead Compounds
Lead And Lead Compounds concentrations are roughly unchanged from 2010.
Arsenic And Arsenic Compounds
Arsenic And Arsenic Compounds concentrations have fallen 49% since 2010.
Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region)
Chromium and Chromium Compounds(except for chromite ore mined in the Transvaal Region) concentrations have fallen 37% since 2010.
Nitrate compounds (water dissociable; reportable only when in aqueous solution)
Nitrate compounds (water dissociable; reportable only when in aqueous solution) concentrations have more than doubled since 2010.
Antimony And Antimony Compounds
Antimony And Antimony Compounds concentrations have more than halved since 2010.
Nickel And Nickel Compounds
Nickel And Nickel Compounds concentrations have more than halved since 2010.
Equity context · ACS 2018-2022 block-group demographics
Who Lives Next To This Facility
Within 3 miles of this facility (23 Census block groups, population-weighted demographics): a population of 41,720. Why we surface this →
28.0%
Low-income
49.0%
People of color
7.9%
Under age 5
8.2%
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.