Los Angeles County, CA

ZIP 90001

In ZIP 90001, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Walnut Park Mutual Water Co. meets every EPA legal limit; 13 contaminants are above health goals, led by lead at 31× California’s Public Health Goal.
• Nearest Superfund site: Cooper Drum Co., 3.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Chevron Products Co. Div Of Chevron USA Inc. (25%), mostly ethylene oxide.
• Fine particles (PM2.5) average 13.2 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 90001

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

Based on 20 census tracts · compiled September 10, 2026 · how each grade works and its sources

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