Santa Clara County, CA

ZIP 95023

In ZIP 95023, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hollister, City Of meets every EPA legal limit; 12 contaminants are above health goals, led by lead at 1,969× 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 261,105 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 95023

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

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

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