Sonoma County, CA

ZIP 95425

In ZIP 95425, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Six Acres Water Company has 2 contaminants at or over an EPA legal limit; 14 contaminants are above health goals, led by pfhxs at 2× California Notification Level.
• 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 D
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityA to C
• Drinking water qualityB to F
• Pesticide useF
• Neighborhood health statusB to D
• Past wildfire impactsA to F
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsA to B

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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