Orange County, CA

ZIP 92604

In ZIP 92604, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Irvine Ranch Water District meets every EPA legal limit; 18 contaminants are above health goals, led by pfos at 2.4× California’s Public Health Goal.
• Nearest Superfund site: El Toro Marine Corps Air Station, 4.3 miles away.
• Largest share of modeled toxic air from industry: Certified Alloy Products Inc (42%), mostly cobalt.
• Fine particles (PM2.5) average 10.6 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 92604

• Superfund sites nearbyD
• Factories and industrial sitesF
• Oil and gas wellsC
• Parks and nature nearbyB
• Air qualityF
• Drinking water qualityC
• Pesticide useB to D
• Neighborhood health statusA to B
• Past wildfire impactsD
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsB

Based on 9 census tracts · compiled October 25, 2026 · how each grade works and its sources

Loading the full report, with every source…