Los Angeles County, CA

ZIP 90831

In ZIP 90831, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Long Beach Utilities Department meets every EPA legal limit; 12 contaminants are above health goals, led by arsenic at 714× California’s Public Health Goal.
• Nearest Superfund site: Montrose Chemical Corp., 7.8 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Ultramar Inc Wilmington Refinery (21%), mostly chromium compounds.
• Fine particles (PM2.5) average 11.3 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 90831

• Superfund sites nearbyD
• Factories and industrial sitesF
• Oil and gas wellsF
• Parks and nature nearbyC
• Air qualityF
• Drinking water qualityC
• Pesticide useC
• Neighborhood health statusA
• Past wildfire impactsA
• Past flood impactsA
• Noise levelsD

Based on 1 census tract · compiled October 25, 2026 · how each grade works and its sources

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