Nevada County, CA

ZIP 95946

In ZIP 95946, 5 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; 7 contaminants are above health goals, led by lead at 923× California’s Public Health Goal.
• Closer to Superfund sites than 53% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Elite Spice Inc. (52%), mostly ethylene oxide.
• Fine particles (PM2.5) average 9.1 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 95946

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

Based on 6 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…