Santa Clara County, CA

ZIP 95123

In ZIP 95123, 8 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: Fairchild Semiconductor Corp. (south San Jose Plant), 1.2 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Tesla Inc. (77%), mostly cobalt compounds.
• Fine particles (PM2.5) average 9.2 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 95123

• Superfund sites nearbyD to F
• Factories and industrial sitesB to C
• Oil and gas wellsA
• Parks and nature nearbyC to F
• Air qualityC to F
• Drinking water qualityF
• Pesticide useC to F
• Neighborhood health statusA to B
• Past wildfire impactsF
• Past flood impactsB
• Noise levelsA to D
• Radiation signalsC to D

Based on 17 census tracts · compiled September 10, 2026 · how each grade works and its sources

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