Orange County, CA

ZIP 92691

In ZIP 92691, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Santa Margarita Water District-Id9 has 2 contaminants at or over an EPA legal limit; 10 contaminants are above health goals, led by pfoa at 1,114× California’s Public Health Goal.
• Nearest Superfund site: El Toro Marine Corps Air Station, 6.7 miles away.
• Largest share of modeled toxic air from industry: Applied Medical Resources Corp (25%), mostly chromium.
• Fine particles (PM2.5) average 9.3 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 92691

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

Based on 15 census tracts · compiled October 25, 2026 · how each grade works and its sources

Loading the full report, with every source…