Honolulu County, HI

ZIP 96731

In ZIP 96731, none of the 12 things we check has a part graded D or F.

• Drinking water: Waialee-Sunset Beach meets every EPA legal limit; 3 contaminants are above health goals, led by bromoform at 3.7× California’s Public Health Goal.
• Closer to Superfund sites than 53% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Hawaiian Electric Co Inc Kahe Generating Station (55%), mostly nickel compounds.
• Fine particles (PM2.5) average 3.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.

Grades for ZIP 96731

• Superfund sites nearbyA to C
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyA to B
• Air qualityA
• Drinking water qualityA to B
• Neighborhood health statusA to B
• Past wildfire impactsA
• Past flood impactsA

Based on 2 census tracts · compiled October 25, 2026 · how each grade works and its sources

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