Calaveras County, CA

ZIP 95257

In ZIP 95257, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Dunrovin Mobile Home Village meets every EPA legal limit; 2 contaminants are above health goals, led by lead at 65× 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: Ampine: A Div Of Timber Products (100%), mostly diisocyanates.
• Fine particles (PM2.5) average 7.3 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 8,792 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 95257

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyB
• Air qualityC
• Drinking water qualityC to F
• Pesticide useC
• Neighborhood health statusF
• Past wildfire impactsF
• Past flood impactsC
• Noise levelsA
• Radiation signalsD

Based on 1 census tract · compiled September 10, 2026 · how each grade works and its sources

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