Los Angeles County, CA

ZIP 90813

In ZIP 90813, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Signal Hill - City, Water Dept. meets every EPA legal limit; 10 contaminants are above health goals, led by arsenic at 884× California’s Public Health Goal.
• Nearest Superfund site: Montrose Chemical Corp., 7.3 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Cunico Corp, A Bwxt Company (30%), mostly chromium compounds.
• Fine particles (PM2.5) average 10.3 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 90813

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

Based on 24 census tracts · compiled October 25, 2026 · how each grade works and its sources

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