Mendocino County, CA

ZIP 95415

In ZIP 95415, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hopland Public Utility District meets every EPA legal limit; 7 contaminants are above health goals, led by arsenic at 325× California’s Public Health Goal.
• Nearest Superfund site: Coast Wood Preserving, 5.0 miles away.
• Largest share of modeled toxic air from industry: Granite Construction Co - Highway 175 (100%), mostly polycyclic aromatic compounds.
• Fine particles (PM2.5) average 6.3 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 95415

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

Based on 3 census tracts · compiled October 25, 2026 · how each grade works and its sources

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