Santa Clara County, CA

ZIP 95023

In ZIP 95023, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Santa Clara Valley Water District meets every EPA legal limit; 14 contaminants are above health goals, led by pfos at 3.7× California’s Public Health Goal.
• Nearest Superfund site: Crazy Horse Sanitary Landfill, 7.6 miles away.
• Largest share of modeled toxic air from industry: Tesla Inc. (60%), mostly cobalt compounds.
• Fine particles (PM2.5) average 7.6 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 162,482 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 95023

• Superfund sites nearbyA to D
• Factories and industrial sitesB to C
• Oil and gas wellsA to F
• Parks and nature nearbyB to F
• Air qualityA to C
• Drinking water qualityB to F
• Pesticide useF
• Neighborhood health statusB to C
• Past wildfire impactsA to F
• Past flood impactsB to C
• Noise levelsA to C
• Radiation signalsD

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

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