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: Lake Arrowhead Csd has 2 contaminants at or over an EPA legal limit; 12 contaminants are above health goals, led by thallium at 5.2× California’s Public Health Goal.
- Nearest Superfund site: Newmark Ground Water Contamination, 7.4 miles away.
- Largest share of modeled toxic air from industry: Cemex Construction Materials Pacific LLC (57%), mostly chromium.
- 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 sitesA to C
- Oil and gas wellsA to C
- Parks and nature nearbyA to D
- Air qualityB to F
- Drinking water qualityA to F
- Pesticide useA
- Neighborhood health statusA to F
- Past wildfire impactsC to F
- Past flood impactsC
- Noise levelsA to D
- Radiation signalsD to F
Based on 25 census tracts · compiled October 25, 2026 · how each grade works and its sources
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