Lake County, CA

ZIP 95451

In ZIP 95451, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Lake County Csa 20 - Soda Bay meets every EPA legal limit; 11 contaminants are above health goals, led by lead at 200× California’s Public Health Goal.
• Nearest Superfund site: Sulphur Bank Mercury Mine, 6.5 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 7.5 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 305,708 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 95451

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

Based on 4 census tracts · compiled September 10, 2026 · how each grade works and its sources

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