Orange County, CA
ZIP 92630
In ZIP 92630, 9 of the 12 things we check have at least one part graded D or F.
- Drinking water: Western Mwd (Arlington) has 3 contaminants at or over an EPA legal limit; 16 contaminants are above health goals, led by trichloroethylene at 16× California’s Public Health Goal.
- Nearest Superfund site: El Toro Marine Corps Air Station, 2.5 miles away.
- Largest share of modeled toxic air from industry: Sterigenics-Ontario Facility (37%), mostly ethylene oxide.
- Fine particles (PM2.5) average 10.5 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 92630
- Superfund sites nearbyD to F
- Factories and industrial sitesC to D
- Oil and gas wellsC to D
- Parks and nature nearbyC to D
- Air qualityD to F
- Drinking water qualityC to F
- Pesticide useC to D
- Neighborhood health statusA to C
- Past wildfire impactsD to F
- Past flood impactsA
- Noise levelsA to C
- Radiation signalsC to D
Based on 14 census tracts · compiled September 10, 2026 · how each grade works and its sources
Loading the full report, with every source…