Salt Lake County, UT

ZIP 84020

In ZIP 84020, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Lehi City meets every EPA legal limit; 9 contaminants are above health goals, led by arsenic at 528× California’s Public Health Goal.
• Nearest Superfund site: Sharon Steel Corp. (midvale Tailings), 4.2 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Bd Medical (67%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.4 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 150,057 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 84020

• Superfund sites nearbyA to F
• Factories and industrial sitesD to F
• Oil and gas wellsA to B
• Parks and nature nearbyA to C
• Air qualityA to D
• Drinking water qualityA to C
• Pesticide useA to D
• Neighborhood health statusA to B
• Past wildfire impactsA to D
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsB to F

Based on 14 census tracts · compiled October 25, 2026 · how each grade works and its sources

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