Orange County, CA

ZIP 92805

In ZIP 92805, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Golden State Wc - Placentia/Yorba Linda has 2 contaminants at or over an EPA legal limit; 18 contaminants are above health goals, led by lead at 18× California’s Public Health Goal.
• Nearest Superfund site: Orange County North Basin, 2.4 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Sterigenics-Ontario Facility (18%), mostly chromium.
• Fine particles (PM2.5) average 12.9 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 206,209 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 92805

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

Based on 15 census tracts · compiled September 10, 2026 · how each grade works and its sources

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