Davis County, UT

ZIP 84040

In ZIP 84040, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hill Air Force Base meets every EPA legal limit; 10 contaminants are above health goals, led by arsenic at 229× California’s Public Health Goal.
• Nearest Superfund site: Hill Air Force Base, 4.0 miles away.
• Largest share of modeled toxic air from industry: Kennecott Utah Copper Smelter & Refinery (55%), mostly arsenic compounds.
• Fine particles (PM2.5) average 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 15,863 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 84040

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

Based on 8 census tracts · compiled October 25, 2026 · how each grade works and its sources

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