Sonoma County, CA

ZIP 95425

In ZIP 95425, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: California-American Geyserville (Puc) meets every EPA legal limit; 8 contaminants are above health goals, led by lead at 38× California’s Public Health Goal.
• Nearest Superfund site: Coast Wood Preserving, 9.5 miles away.
• Largest share of modeled toxic air from industry: Granite Construction Co - Highway 175 (100%), mostly polycyclic aromatic compounds.
• Fine particles (PM2.5) average 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 1,321,118 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 95425

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

Based on 4 census tracts · compiled September 10, 2026 · how each grade works and its sources

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