Orange County, CA

ZIP 92801

In ZIP 92801, 10 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: Mccoll, 4.0 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Certified Alloy Products Inc (17%), mostly ethylene oxide.
• Fine particles (PM2.5) average 13.2 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 92801

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

Based on 21 census tracts · compiled September 10, 2026 · how each grade works and its sources

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