Orange County, CA

ZIP 92887

In ZIP 92887, 10 of the 12 things we check have at least one part graded D or F.

• Drinking water: Chino Hills, City Of has 2 contaminants at or over an EPA legal limit; 21 contaminants are above health goals, led by lead at 2,351× California’s Public Health Goal.
• Nearest Superfund site: Orange County North Basin, 9.0 miles away.
• Largest share of modeled toxic air from industry: Sterigenics-Ontario Facility (32%), mostly ethylene oxide.
• Fine particles (PM2.5) average 8.8 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 92887

• Superfund sites nearbyA to D
• Factories and industrial sitesC to D
• Oil and gas wellsC to F
• Parks and nature nearbyB to D
• Air qualityF
• Drinking water qualityF
• Pesticide useC to D
• Neighborhood health statusA to B
• Past wildfire impactsF
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsD

Based on 8 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…