Los Angeles County, CA

ZIP 90042

In ZIP 90042, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of South Pasadena meets every EPA legal limit; 20 contaminants are above health goals, led by lead at 136× California’s Public Health Goal.
• Nearest Superfund site: San Gabriel Valley (area 3), 3.4 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Certified Alloy Products Inc (25%), mostly ethylene oxide.
• Fine particles (PM2.5) average 13.1 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 90042

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

Based on 25 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…