Nevada County, CA

ZIP 95949

In ZIP 95949, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Midway Heights C. W. D. meets every EPA legal limit; 5 contaminants are above health goals, led by chloroform at 105× California’s Public Health Goal.
• Nearest Superfund site: Lava Cap Mine, 4.7 miles away.
• Largest share of modeled toxic air from industry: Greenheck Fan Corp - Rocklin California (63%), mostly chromium.
• 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 95949

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

Based on 9 census tracts · compiled October 25, 2026 · how each grade works and its sources

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