San Bernardino County, CA

ZIP 92256

In ZIP 92256, 4 of the 12 things we check have at least one part graded D or F.

• Drinking water: Hi Desert Wd meets every EPA legal limit; 15 contaminants are above health goals, led by pfos at 2.1× California’s Public Health Goal.
• Closer to Superfund sites than 0% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Mitsubishi Cement Corp. (79%), mostly chromium.
• Fine particles (PM2.5) average 7.8 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 92256

• Superfund sites nearbyA
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityA to C
• Drinking water qualityC to F
• Pesticide useB
• Neighborhood health statusF
• Past wildfire impactsA to F
• Past flood impactsC
• Noise levelsA
• Radiation signalsD to F

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

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