Kenai Peninsula County, AK

ZIP 99605

In ZIP 99605, 1 of the 12 things we check have at least one part graded D or F.

Drinking water: Sun Valley Heights North meets every EPA legal limit; 2 contaminants are above health goals, led by lead at 27× 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 - Anchorage Terminal (86%), mostly benzene.
Fine particles (PM2.5) average 4.0 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.

Grades for ZIP 99605

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…