Alameda County, CA

ZIP 94546

In ZIP 94546, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Hayward has 1 contaminant at or over an EPA legal limit; 13 contaminants are above health goals, led by lead at 35× California’s Public Health Goal.
• Closer to Superfund sites than 56% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Tesla Inc. (34%), mostly cobalt compounds.
• Fine particles (PM2.5) average 8.2 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 94546

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

Based on 13 census tracts · compiled September 10, 2026 · how each grade works and its sources

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