Los Angeles County, CA

ZIP 91020

In ZIP 91020, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: La Canada Irrigation Dist. meets every EPA legal limit; 13 contaminants are above health goals, led by lead at 39× California’s Public Health Goal.
• Nearest Superfund site: San Fernando Valley (area 3), 2.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Certified Alloy Products Inc (33%), mostly cobalt.
• Fine particles (PM2.5) average 9.0 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 91020

• Superfund sites nearbyF
• Factories and industrial sitesC
• Oil and gas wellsA to C
• Parks and nature nearbyD to F
• Air qualityD to F
• Drinking water qualityC to F
• Pesticide useB
• Neighborhood health statusA to B
• Past wildfire impactsD to F
• Past flood impactsA
• Noise levelsA to D

Based on 6 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…