Orange County, CA

ZIP 92840

In ZIP 92840, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Garden Grove has 2 contaminants at or over an EPA legal limit; 18 contaminants are above health goals, led by lead at 10× California’s Public Health Goal.
• Nearest Superfund site: Ralph Gray Trucking Co., 3.3 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Certified Alloy Products Inc (40%), mostly cobalt.
• Fine particles (PM2.5) average 11.9 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 92840

• Superfund sites nearbyD
• Factories and industrial sitesF
• Oil and gas wellsA to D
• Parks and nature nearbyF
• Air qualityF
• Drinking water qualityF
• Pesticide useC
• Neighborhood health statusA to B
• Past wildfire impactsC to D
• Past flood impactsA
• Noise levelsA to D
• Radiation signalsC to D

Based on 15 census tracts · compiled September 10, 2026 · how each grade works and its sources

Loading the full report, with every source…