San Bernardino County, CA

ZIP 92345

In ZIP 92345, 8 of the 12 things we check have at least one part graded D or F.

• Drinking water: Sbdno County Service Area 64 meets every EPA legal limit; 10 contaminants are above health goals, led by pfos at 2.8× California’s Public Health Goal.
• Nearest Superfund site: Newmark Ground Water Contamination, 7.4 miles away.
• Largest share of modeled toxic air from industry: Sterigenics-Ontario Facility (81%), mostly ethylene oxide.
• Fine particles (PM2.5) average 9.2 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 92345

• Superfund sites nearbyA to D
• Factories and industrial sitesB to C
• Oil and gas wellsA to C
• Parks and nature nearbyB to F
• Air qualityB to F
• Drinking water qualityD to F
• Pesticide useB
• Neighborhood health statusB to F
• Past wildfire impactsC to F
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsD

Based on 25 census tracts · compiled September 10, 2026 · how each grade works and its sources

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