Mariposa County, CA

ZIP 95345

In ZIP 95345, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Cedar Lodge has 1 contaminant at or over an EPA legal limit; 13 contaminants are above health goals, led by pfos at 4.4× 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: Spi Sonora Div (100%), mostly dioxin and dioxin-like compounds.
• 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 95345

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

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

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