Ventura County, CA

ZIP 91320

In ZIP 91320, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Los Angeles Cwwd 29 & 80-Malibu meets every EPA legal limit; 7 contaminants are above health goals, led by lead at 182× 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.
• Largest share of modeled toxic air from industry: Klune Industries Inc. (47%), mostly chromium.
• Fine particles (PM2.5) average 8.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 2,496,015 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 91320

• Superfund sites nearbyA
• Factories and industrial sitesC to F
• Oil and gas wellsB to F
• Parks and nature nearbyA to C
• Air qualityB to D
• Drinking water qualityC to F
• Pesticide useD to F
• Neighborhood health statusA to B
• Past wildfire impactsF
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC to D

Based on 12 census tracts · compiled October 25, 2026 · how each grade works and its sources

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