San Bernardino County, CA
ZIP 92356
In ZIP 92356, 7 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 94% of U.S. neighborhoods, with no listed site within 10 miles of its center.
- Largest share of modeled toxic air from industry: Sterigenics-Ontario Facility (59%), mostly ethylene oxide.
- Fine particles (PM2.5) average 6.8 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 92356
- Superfund sites nearbyA to F
- Factories and industrial sitesA to B
- Oil and gas wellsA to B
- Parks and nature nearbyB to C
- Air qualityA to B
- Drinking water qualityB to F
- Pesticide useB to C
- Neighborhood health statusD to F
- Past wildfire impactsA to F
- Past flood impactsC to D
- Noise levelsA to D
- Radiation signalsD to F
Based on 6 census tracts · compiled September 10, 2026 · how each grade works and its sources
Loading the full report, with every source…