Solano County, CA

ZIP 94534

In ZIP 94534, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Rural North Vacaville Water District meets every EPA legal limit; 6 contaminants are above health goals, led by arsenic at 2,013× California’s Public Health Goal.
• Nearest Superfund site: Travis Air Force Base, 7.1 miles away.
• Largest share of modeled toxic air from industry: Valero Refining Co-Cali Fornia Benicia Refinery (27%), mostly nickel compounds.
• Fine particles (PM2.5) average 9.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 511,126 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 94534

• Superfund sites nearbyA to D
• Factories and industrial sitesB to D
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityC to F
• Drinking water qualityC to F
• Pesticide useD to F
• Neighborhood health statusA to C
• Past wildfire impactsC to F
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsA to B

Based on 11 census tracts · compiled October 25, 2026 · how each grade works and its sources

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