Orange County, CA

ZIP 92660

In ZIP 92660, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Irvine Ranch Water District meets every EPA legal limit; 18 contaminants are above health goals, led by pfos at 2.4× California’s Public Health Goal.
• Nearest Superfund site: El Toro Marine Corps Air Station, 8.2 miles away.
• Largest share of modeled toxic air from industry: Certified Alloy Products Inc (43%), mostly cobalt.
• Fine particles (PM2.5) average 10.1 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 92660

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

Based on 13 census tracts · compiled October 25, 2026 · how each grade works and its sources

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