Tooele County, UT

ZIP 84074

In ZIP 84074, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: South Rim Water System meets every EPA legal limit; 2 contaminants are above health goals, led by arsenic at 350× California’s Public Health Goal.
• Nearest Superfund site: International Smelting and Refining, 3.6 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: US Magnesium LLC (43%), mostly chlorine.
• Fine particles (PM2.5) average 5.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 10,523 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 84074

• Superfund sites nearbyF
• Factories and industrial sitesA to D
• Oil and gas wellsA
• Parks and nature nearbyA to C
• Air qualityA
• Drinking water qualityC
• Pesticide useB to D
• Neighborhood health statusB to D
• Past wildfire impactsA to F
• Past flood impactsA
• Noise levelsA to C
• Radiation signalsC to F

Based on 15 census tracts · compiled October 25, 2026 · how each grade works and its sources

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