Santa Clara County, CA

ZIP 95139

In ZIP 95139, 4 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), 1.0 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Tesla Inc. (79%), mostly cobalt compounds.
• Fine particles (PM2.5) average 7.8 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 95139

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

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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