Nevada County, CA

ZIP 95959

In ZIP 95959, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Donner Summit Public Utility District meets every EPA legal limit; 6 contaminants are above health goals, led by arsenic at 256× California’s Public Health Goal.
• Nearest Superfund site: Lava Cap Mine, 5.1 miles away.
• Largest share of modeled toxic air from industry: Sierra Pacific Industries Lincoln Div (73%), mostly ammonia.
• Fine particles (PM2.5) average 8.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 5,533 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 95959

• Superfund sites nearbyA to F
• Factories and industrial sitesA to C
• Oil and gas wellsA
• Parks and nature nearbyA to C
• Air qualityA to F
• Drinking water qualityB to F
• Pesticide useC
• Neighborhood health statusC to D
• Past wildfire impactsC to F
• Past flood impactsB
• Noise levelsA
• Radiation signalsB to D

Based on 8 census tracts · compiled October 25, 2026 · how each grade works and its sources

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