Orange County, CA

ZIP 92610

In ZIP 92610, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Santa Margarita Water District meets every EPA legal limit; 8 contaminants are above health goals, led by lithium at 4.2× the USGS health-based screening level.
• Nearest Superfund site: El Toro Marine Corps Air Station, 3.4 miles away.
• Largest share of modeled toxic air from industry: Certified Alloy Products Inc (34%), mostly ethylene oxide.
• Fine particles (PM2.5) average 11.2 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 92610

• Superfund sites nearbyD to F
• Factories and industrial sitesD
• Oil and gas wellsC
• Parks and nature nearbyA to B
• Air qualityC to F
• Drinking water qualityC
• Pesticide useB to C
• Neighborhood health statusA
• Past wildfire impactsF
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsD

Based on 4 census tracts · compiled October 25, 2026 · how each grade works and its sources

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