Los Angeles County, CA

ZIP 90023

In ZIP 90023, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Vernon-City, Water Dept. has 1 contaminant at or over an EPA legal limit; 18 contaminants are above health goals, led by lead at 39× California’s Public Health Goal.
• Nearest Superfund site: Pemaco Maywood, 1.7 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Sterigenics US LLC La 50Th (48%), mostly ethylene oxide.
• Fine particles (PM2.5) average 15.7 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 90023

• Superfund sites nearbyF
• Factories and industrial sitesF
• Oil and gas wellsF
• Parks and nature nearbyD to F
• Air qualityF
• Drinking water qualityF
• Pesticide useB to C
• Neighborhood health statusA to D
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsB to F

Based on 19 census tracts · compiled September 10, 2026 · how each grade works and its sources

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