Cache County, UT

ZIP 84321

In ZIP 84321, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: North Logan City meets every EPA legal limit; 8 contaminants are above health goals, led by lead at 31× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Ttm Technologies Inc. (83%), mostly nitric acid.
• Fine particles (PM2.5) average 6.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 55,660 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 84321

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

Based on 19 census tracts · compiled September 10, 2026 · how each grade works and its sources

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