San Bernardino County, CA

ZIP 92337

In ZIP 92337, 7 of the 12 things we check have at least one part graded D or F.

• Drinking water: San Gabriel Valley Wc - Fontana has 1 contaminant at or over an EPA legal limit; 23 contaminants are above health goals, led by lead at 49× California’s Public Health Goal.
• Nearest Superfund site: Stringfellow, 3.5 miles away (3 within 10 miles).
• Largest share of modeled toxic air from industry: Sterigenics-Ontario Facility (85%), mostly ethylene oxide.
• Fine particles (PM2.5) average 12.4 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 92337

• Superfund sites nearbyD to F
• Factories and industrial sitesD to F
• Oil and gas wellsA to C
• Parks and nature nearbyC to F
• Air qualityF
• Drinking water qualityD to F
• Pesticide useB
• Neighborhood health statusA to C
• Past wildfire impactsC
• Past flood impactsC
• Noise levelsA to D
• Radiation signalsD

Based on 8 census tracts · compiled September 10, 2026 · how each grade works and its sources

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