Kenai Peninsula County, AK

ZIP 99611

In ZIP 99611, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Ashton Park has 2 contaminants at or over an EPA legal limit; 5 contaminants are above health goals, led by arsenic at 9,213× 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: Tesoro Alaska - Kenai Refinery (100%), mostly benzene.
• Fine particles (PM2.5) average 4.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.

Grades for ZIP 99611

• Superfund sites nearbyA
• Factories and industrial sitesA to B
• Oil and gas wellsB to D
• Air qualityA
• Drinking water qualityD to F
• Neighborhood health statusB to D
• Past wildfire impactsA to C
• Past flood impactsA
• Radiation signalsC

Based on 4 census tracts · compiled September 10, 2026 · how each grade works and its sources

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