Los Angeles County, CA

ZIP 90401

In ZIP 90401, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Santa Monica-City, Water Division meets every EPA legal limit; 18 contaminants are above health goals, led by trichloroethylene at 1.6× 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: Certified Alloy Products Inc (26%), mostly cobalt.
• Fine particles (PM2.5) average 11.5 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 90401

• Superfund sites nearbyA
• Factories and industrial sitesF
• Oil and gas wellsF
• Parks and nature nearbyB
• Air qualityF
• Drinking water qualityC
• Pesticide useB to C
• Neighborhood health statusA to B
• Past wildfire impactsD
• Past flood impactsA
• Noise levelsC to D

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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