San Bernardino County, CA
ZIP 92371
In ZIP 92371, 5 of the 12 things we check have at least one part graded D or F.
- Drinking water: Helendale Community Service District has 2 contaminants at or over an EPA legal limit; 10 contaminants are above health goals, led by pfos at 19× California’s Public Health Goal.
- Nearest Superfund site: George Air Force Base, 5.0 miles away.
- Largest share of modeled toxic air from industry: Sterigenics-Ontario Facility (81%), mostly ethylene oxide.
- Fine particles (PM2.5) average 7.5 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 92371
- Superfund sites nearbyA to F
- Factories and industrial sitesA to B
- Oil and gas wellsA to C
- Parks and nature nearbyA to C
- Air qualityB to C
- Drinking water qualityA to F
- Pesticide useA
- Neighborhood health statusC to F
- Past wildfire impactsA to F
- Past flood impactsC
- Noise levelsA to C
- Radiation signalsD to F
Based on 9 census tracts · compiled October 25, 2026 · how each grade works and its sources
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