Bethel County, AK

ZIP 99503

In ZIP 99503, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Crooked Creek Watering Point meets every EPA legal limit; 6 contaminants are above health goals, led by lead at 34× California’s Public Health Goal.
• Nearest Superfund site: Elmendorf Air Force Base, 5.1 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Tesoro - Anchorage Terminal (90%), mostly benzene.
• Fine particles (PM2.5) average 5.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.

Grades for ZIP 99503

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

Based on 7 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…