Orange County, CA

ZIP 92679

In ZIP 92679, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: Elsinore Valley Mwd has 1 contaminant at or over an EPA legal limit; 17 contaminants are above health goals, led by arsenic at 2,102× California’s Public Health Goal.
• Nearest Superfund site: El Toro Marine Corps Air Station, 5.1 miles away.
• Largest share of modeled toxic air from industry: Sterigenics-Ontario Facility (48%), mostly ethylene oxide.
• Fine particles (PM2.5) average 9.2 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 92679

• Superfund sites nearbyA to D
• Factories and industrial sitesB to D
• Oil and gas wellsA to C
• Parks and nature nearbyA to B
• Air qualityA to F
• Drinking water qualityC to F
• Pesticide useB to D
• Neighborhood health statusA to B
• Past wildfire impactsD to F
• Past flood impactsA to C
• Noise levelsA
• Radiation signalsC to D

Based on 10 census tracts · compiled October 25, 2026 · how each grade works and its sources

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