Honolulu County, HI

ZIP 96818

In ZIP 96818, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hnl-Windward-Pearl Harbor meets every EPA legal limit; 8 contaminants are above health goals, led by arsenic at 250× California’s Public Health Goal.
• Nearest Superfund site: Pearl Harbor Naval Complex, 2.3 miles away.
• Largest share of modeled toxic air from industry: Hffc Airport Fuel Farm (81%), mostly chromium.
• Fine particles (PM2.5) average 4.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.

Grades for ZIP 96818

• Superfund sites nearbyF
• Factories and industrial sitesC to F
• Oil and gas wellsA
• Parks and nature nearbyB to D
• Air qualityA
• Drinking water qualityC
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsA

Based on 19 census tracts · compiled October 25, 2026 · how each grade works and its sources

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