Navajo County, AZ

ZIP 86043

In ZIP 86043, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Mishongnovi (Upper Sipaulovi/Upper Mishongnovi) has 1 contaminant at or over an EPA legal limit; 2 contaminants are above health goals, led by arsenic at 4,181× 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.
• Fine particles (PM2.5) average 4.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 69,587 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 86043

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

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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