Orange County, CA

ZIP 92649

In ZIP 92649, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: City Of Westminster meets every EPA legal limit; 12 contaminants are above health goals, led by pfos at 2.8× California’s Public Health Goal.
• Nearest Superfund site: Ralph Gray Trucking Co., 1.7 miles away (2 within 10 miles).
• Largest share of modeled toxic air from industry: Certified Alloy Products Inc (61%), mostly cobalt.
• Fine particles (PM2.5) average 11.6 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 92649

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

Based on 11 census tracts · compiled October 25, 2026 · how each grade works and its sources

Loading the full report, with every source…