Los Angeles County, CA

ZIP 91326

In ZIP 91326, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Las Virgenes Mwd meets every EPA legal limit; 9 contaminants are above health goals, led by arsenic at 361× 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: Chevron Products Co. Div Of Chevron USA Inc. (37%), mostly ethylene oxide.
• Fine particles (PM2.5) average 9.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 250,208 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 91326

• Superfund sites nearbyA
• Factories and industrial sitesD to F
• Oil and gas wellsF
• Parks and nature nearbyB to D
• Air qualityC to F
• Drinking water qualityC
• Pesticide useB
• Neighborhood health statusA to B
• Past wildfire impactsD to F
• Past flood impactsA
• Noise levelsA to B
• Radiation signalsD

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

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