Mariposa County, CA

ZIP 95318

In ZIP 95318, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Fishcamp Mutual Water Company meets every EPA legal limit; 5 contaminants are above health goals, led by lead at 33× 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.
• Fine particles (PM2.5) average 11.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 1,787 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 95318

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

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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