Orange County, CA

ZIP 92651

In ZIP 92651, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Irvine Ranch Water District has 2 contaminants at or over an EPA legal limit; 22 contaminants are above health goals, led by lead at 154× California’s Public Health Goal.
• Nearest Superfund site: El Toro Marine Corps Air Station, 4.5 miles away.
• Largest share of modeled toxic air from industry: Certified Alloy Products Inc (67%), mostly cobalt.
• Fine particles (PM2.5) average 9.0 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 92651

• Superfund sites nearbyA to D
• Factories and industrial sitesB to D
• Oil and gas wellsC to D
• Parks and nature nearbyB to D
• Air qualityD to F
• Drinking water qualityD to F
• Pesticide useC to D
• Neighborhood health statusB to C
• Past wildfire impactsD to F
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC

Based on 9 census tracts · compiled September 10, 2026 · how each grade works and its sources

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