San Bernardino County, CA

ZIP 92350

In ZIP 92350, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Loma Linda, City Of has 1 contaminant at or over an EPA legal limit; 14 contaminants are above health goals, led by arsenic at 1,806× California’s Public Health Goal.
• Nearest Superfund site: Norton Air Force Base (lndfll #2), 3.4 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Sterigenics-Ontario Facility (59%), mostly ethylene oxide.
• Fine particles (PM2.5) average 11.3 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 92350

• Superfund sites nearbyF
• Factories and industrial sitesD
• Oil and gas wellsC
• Parks and nature nearbyC
• Air qualityF
• Drinking water qualityC to D
• Pesticide useA
• Neighborhood health statusB
• Past wildfire impactsC
• Past flood impactsC
• Noise levelsD
• Radiation signalsD

Based on 1 census tract · compiled October 25, 2026 · how each grade works and its sources

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