Salt Lake County, UT
ZIP 84104
In ZIP 84104, 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 (93%), 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 84104
- Superfund sites nearbyF
- Factories and industrial sitesD to F
- Oil and gas wellsA
- Parks and nature nearbyB to C
- Air qualityB to D
- Drinking water qualityC to D
- Pesticide useA to C
- Neighborhood health statusA to C
- Past wildfire impactsA to C
- Past flood impactsA
- Noise levelsA to D
- Radiation signalsD to F
Based on 10 census tracts · compiled October 25, 2026 · how each grade works and its sources
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