Sonoma County, CA
ZIP 95403
In ZIP 95403, 6 of the 12 things we check have at least one part graded D or F.
- Drinking water: Stonegate Mobile Home Park has 1 contaminant at or over an EPA legal limit; 7 contaminants are above health goals, led by pfos at 9.1× California’s Public Health Goal.
- Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
- Largest share of modeled toxic air from industry: Nick Barbieri Trucking LLC (85%), mostly polycyclic aromatic compounds.
- Fine particles (PM2.5) average 8.3 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 95403
- Superfund sites nearbyA
- Factories and industrial sitesB to D
- Oil and gas wellsA
- Parks and nature nearbyB to C
- Air qualityA to D
- Drinking water qualityA to F
- Pesticide useD to F
- Neighborhood health statusB to C
- Past wildfire impactsC to F
- Past flood impactsA
- Noise levelsA to D
- Radiation signalsA to B
Based on 15 census tracts · compiled October 25, 2026 · how each grade works and its sources
Loading the full report, with every source…