Salt Lake County, UT

ZIP 84120

In ZIP 84120, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Magna Water District has 1 contaminant at or over an EPA legal limit; 10 contaminants are above health goals, led by arsenic at 1,545× California’s Public Health Goal.
• Nearest Superfund site: Portland Cement (kiln Dust 2 & 3), 2.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Kennecott Utah Copper Smelter & Refinery (64%), mostly arsenic compounds.
• Fine particles (PM2.5) average 7.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 11,147 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 84120

• Superfund sites nearbyF
• Factories and industrial sitesD
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityB to D
• Drinking water qualityC to D
• Pesticide useA to B
• Neighborhood health statusB to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to C
• Radiation signalsD to F

Based on 13 census tracts · compiled October 25, 2026 · how each grade works and its sources

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