Placer County, CA

ZIP 95658

In ZIP 95658, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Gold Hill Mobilehome Park has 1 contaminant at or over an EPA legal limit; 10 contaminants are above health goals, led by pfos at 6.5× California’s Public Health Goal.
• Closer to Superfund sites than 55% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Mitsubishi Chemical Carbon Fiber & Composites Inc. (72%), mostly hydrogen cyanide.
• Fine particles (PM2.5) average 9.1 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 85,451 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 95658

• Superfund sites nearbyA to C
• Factories and industrial sitesA to C
• Oil and gas wellsA
• Parks and nature nearbyA to B
• Air qualityF
• Drinking water qualityC to D
• Pesticide useC to D
• Neighborhood health statusB to C
• Past wildfire impactsA
• Past flood impactsB
• Noise levelsA to B
• Radiation signalsA to C

Based on 7 census tracts · compiled October 25, 2026 · how each grade works and its sources

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