Santa Clara County, CA

ZIP 94040

In ZIP 94040, 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; 11 contaminants are above health goals, led by pfos at 2.7× California’s Public Health Goal.
• Nearest Superfund site: Jasco Chemical Corp., 2.9 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Tesla Inc. (70%), mostly cobalt compounds.
• Fine particles (PM2.5) average 7.4 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 94040

• Superfund sites nearbyF
• Factories and industrial sitesF
• Oil and gas wellsA
• Parks and nature nearbyB to D
• Air qualityB to C
• Drinking water qualityC
• Pesticide useB to C
• Neighborhood health statusA
• Past wildfire impactsA to C
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsB to C

Based on 13 census tracts · compiled October 25, 2026 · how each grade works and its sources

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