Alameda County, CA

ZIP 94603

In ZIP 94603, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: East Bay Mud meets every EPA legal limit; 13 contaminants are above health goals, led by lead at 48× California’s Public Health Goal.
• Nearest Superfund site: Alameda Naval Air Station, 6.7 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Pcc Structurals-San Leandro (41%), mostly cobalt.
• Fine particles (PM2.5) average 8.7 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 57,837 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 94603

• Superfund sites nearbyA to D
• Factories and industrial sitesC to D
• Oil and gas wellsA
• Parks and nature nearbyD to F
• Air qualityD to F
• Drinking water qualityF
• Pesticide useB to D
• Neighborhood health statusB to C
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsA to F
• Radiation signalsB to C

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

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