Placer County, CA

ZIP 95661

In ZIP 95661, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Folsom, City Of - Ashland meets every EPA legal limit; 5 contaminants are above health goals, led by chloroform at 97× California’s Public Health Goal.
• Nearest Superfund site: Mcclellan Air Force Base (ground Water Contamination), 7.3 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Mitsubishi Chemical Carbon Fiber & Composites Inc. (58%), mostly hydrogen cyanide.
• Fine particles (PM2.5) average 11.1 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 95661

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

Based on 11 census tracts · compiled October 25, 2026 · how each grade works and its sources

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