San Diego County, CA

ZIP 92059

In ZIP 92059, 3 of the 12 things we check have at least one part graded D or F.

• Drinking water: Valley Center Mwd meets every EPA legal limit; 10 contaminants are above health goals, led by lead at 336× California’s Public Health Goal.
• Closer to Superfund sites than 56% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Steris Inc (86%), mostly ethylene oxide.
• Fine particles (PM2.5) average 6.2 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 344,328 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 92059

• Superfund sites nearbyA to C
• Factories and industrial sitesA to B
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityA
• Drinking water qualityC to F
• Pesticide useD
• Neighborhood health statusB to C
• Past wildfire impactsD
• Past flood impactsA
• Noise levelsA
• Radiation signalsC

Based on 2 census tracts · compiled September 10, 2026 · how each grade works and its sources

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