Salt Lake County, UT

ZIP 84104

In ZIP 84104, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Salt Lake City Water System has 2 contaminants at or over an EPA legal limit; 19 contaminants are above health goals, led by pfos at 7.1× 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 84104

• Superfund sites nearbyF
• Factories and industrial sitesF
• Oil and gas wellsA
• Parks and nature nearbyB to F
• Air qualityB to D
• Drinking water qualityD to F
• Pesticide useB to C
• Neighborhood health statusB to D
• Past wildfire impactsA to C
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsD

Based on 10 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…