Marin County, CA
ZIP 94952
In ZIP 94952, 6 of the 12 things we check have at least one part graded D or F.
- Drinking water: College Park Mutual Water Company has 1 contaminant at or over an EPA legal limit; 4 contaminants are above health goals, led by arsenic at 2,854× 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: Phillips 66 San Francisco Refinery (29%), mostly sulfuric acid.
- 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 94952
- Superfund sites nearbyA
- Factories and industrial sitesA to C
- Oil and gas wellsA to B
- Parks and nature nearbyA to D
- Air qualityA to C
- Drinking water qualityA to D
- Pesticide useC to F
- Neighborhood health statusB to D
- Past wildfire impactsA to F
- Past flood impactsA
- Noise levelsA to D
- Radiation signalsA to B
Based on 14 census tracts · compiled October 25, 2026 · how each grade works and its sources
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