San Bernardino County, CA

ZIP 92411

In ZIP 92411, 9 of the 12 things we check have at least one part graded D or F.

• Drinking water: Colton, City Of has 1 contaminant at or over an EPA legal limit; 13 contaminants are above health goals, led by pfoa at 471× California’s Public Health Goal.
• Nearest Superfund site: Rockets, Fireworks, and Flares Site, 3.2 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Sterigenics-Ontario Facility (83%), mostly ethylene oxide.
• Fine particles (PM2.5) average 12.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 52,223 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 92411

• Superfund sites nearbyF
• Factories and industrial sitesC to D
• Oil and gas wellsC
• Parks and nature nearbyB to D
• Air qualityF
• Drinking water qualityB to F
• Pesticide useA to B
• Neighborhood health statusC to F
• Past wildfire impactsD to F
• Past flood impactsC
• Noise levelsA to F
• Radiation signalsC to F

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

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