Mendocino County, CA

ZIP 95428

In ZIP 95428, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Covelo Mobile Home Park meets every EPA legal limit; 1 contaminant is above health goals, led by arsenic at 438× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Fine particles (PM2.5) average 10.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 471,607 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 95428

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyC
• Air qualityF
• Drinking water qualityC
• Pesticide useF
• Neighborhood health statusF
• Past wildfire impactsF
• Past flood impactsA
• Noise levelsA
• Radiation signalsB

Based on 1 census tract · compiled October 25, 2026 · how each grade works and its sources

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