Honolulu County, HI

ZIP 96857

In ZIP 96857, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Schofield Barracks meets every EPA legal limit; 4 contaminants are above health goals, led by vanadium at 1.8× California’s Public Health Goal.
• Nearest Superfund site: Schofield Barracks (usarmy), 0.7 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Hawaiian Electric Co Inc Kahe Generating Station (50%), mostly nickel compounds.
• Fine particles (PM2.5) average 3.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.

Grades for ZIP 96857

• Superfund sites nearbyF
• Factories and industrial sitesA to B
• Oil and gas wellsA
• Air qualityA
• Drinking water qualityF
• Neighborhood health statusA
• Past wildfire impactsA
• Past flood impactsA

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

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