Orange County, CA

ZIP 92618

In ZIP 92618, 10 of the 12 things we check have at least one part graded D or F.

• Drinking water: Western Mwd (Arlington) has 3 contaminants at or over an EPA legal limit; 16 contaminants are above health goals, led by trichloroethylene at 16× California’s Public Health Goal.
• Nearest Superfund site: El Toro Marine Corps Air Station, 3.3 miles away.
• Largest share of modeled toxic air from industry: Certified Alloy Products Inc (59%), mostly cobalt.
• Fine particles (PM2.5) average 10.2 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 92618

• Superfund sites nearbyD to F
• Factories and industrial sitesD
• Oil and gas wellsC to D
• Parks and nature nearbyB to F
• Air qualityC to F
• Drinking water qualityD to F
• Pesticide useC to D
• Neighborhood health statusA to B
• Past wildfire impactsD to F
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC to D

Based on 14 census tracts · compiled September 10, 2026 · how each grade works and its sources

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