San Diego County, CA

ZIP 92004

In ZIP 92004, 6 of the 12 things we check have at least one part graded D or F.

• Drinking water: Ocotillo Oasis, Llc has 1 contaminant at or over an EPA legal limit; 4 contaminants are above health goals, led by thallium at 710× California’s Public Health Goal.
• Closer to Superfund sites than 55% of U.S. neighborhoods, with no listed site within 10 miles of its center.
• Largest share of modeled toxic air from industry: Imperial Western Products Inc (53%), mostly ammonia.
• Fine particles (PM2.5) average 8.8 µg/m³; the WHO guideline is 5 and the EPA annual standard is 9.
• About 2,702,670 kg of agricultural pesticides are applied in the county each year.

Grades for ZIP 92004

• Superfund sites nearbyA to C
• Factories and industrial sitesA
• Oil and gas wellsA
• Parks and nature nearbyB to C
• Air qualityA to F
• Drinking water qualityC to F
• Pesticide useC to F
• Neighborhood health statusC to D
• Past wildfire impactsA to D
• Past flood impactsA
• Noise levelsA
• Radiation signalsD

Based on 3 census tracts · compiled September 10, 2026 · how each grade works and its sources

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