Anchorage County, AK

ZIP 99504

In ZIP 99504, 2 of the 12 things we check have at least one part graded D or F.

• Drinking water: Riviera Terrace Tc meets every EPA legal limit; 5 contaminants are above health goals, led by lead at 101× California’s Public Health Goal.
• Nearest Superfund site: Fort Richardson (usarmy), 1.8 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: US Dod Usaf Joint Base Elmendorf-Richardson (89%), mostly lead compounds.
• Fine particles (PM2.5) average 4.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.

Grades for ZIP 99504

• Superfund sites nearbyC to F
• Factories and industrial sitesA to B
• Oil and gas wellsA to B
• Air qualityA
• Drinking water qualityC to F
• Neighborhood health statusA to C
• Past wildfire impactsA
• Past flood impactsA
• Radiation signalsB to C

Based on 12 census tracts · compiled September 10, 2026 · how each grade works and its sources

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