San Bernardino County, CA

ZIP 92344

In ZIP 92344, 5 of the 12 things we check have at least one part graded D or F.

• Drinking water: Sbdno County Service Area 70j meets every EPA legal limit; 6 contaminants are above health goals, led by arsenic at 1,120× California’s Public Health Goal.
• Nearest Superfund site: George Air Force Base, 9.4 miles away.
• Largest share of modeled toxic air from industry: Sterigenics-Ontario Facility (78%), mostly ethylene oxide.
• Fine particles (PM2.5) average 7.9 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 92344

• Superfund sites nearbyA to C
• Factories and industrial sitesA to B
• Oil and gas wellsA to C
• Parks and nature nearbyA to C
• Air qualityB to D
• Drinking water qualityC
• Pesticide useA
• Neighborhood health statusA to D
• Past wildfire impactsC to D
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsD

Based on 7 census tracts · compiled October 25, 2026 · how each grade works and its sources

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